mirror of https://gitee.com/openkylin/linux.git
3469 lines
88 KiB
C
3469 lines
88 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Procedures for interfacing to Open Firmware.
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
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* {engebret|bergner}@us.ibm.com
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*/
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#undef DEBUG_PROM
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/* we cannot use FORTIFY as it brings in new symbols */
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#define __NO_FORTIFY
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#include <stdarg.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/proc_fs.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/bitops.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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#include <asm/iommu.h>
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#include <asm/btext.h>
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#include <asm/sections.h>
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#include <asm/machdep.h>
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#include <asm/asm-prototypes.h>
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#include <asm/ultravisor-api.h>
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#include <linux/linux_logo.h>
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/* All of prom_init bss lives here */
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#define __prombss __section(.bss.prominit)
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/*
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* Eventually bump that one up
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*/
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#define DEVTREE_CHUNK_SIZE 0x100000
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/*
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* This is the size of the local memory reserve map that gets copied
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* into the boot params passed to the kernel. That size is totally
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* flexible as the kernel just reads the list until it encounters an
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* entry with size 0, so it can be changed without breaking binary
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* compatibility
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*/
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#define MEM_RESERVE_MAP_SIZE 8
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/*
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* prom_init() is called very early on, before the kernel text
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* and data have been mapped to KERNELBASE. At this point the code
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* is running at whatever address it has been loaded at.
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* On ppc32 we compile with -mrelocatable, which means that references
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* to extern and static variables get relocated automatically.
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* ppc64 objects are always relocatable, we just need to relocate the
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* TOC.
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*
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* Because OF may have mapped I/O devices into the area starting at
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* KERNELBASE, particularly on CHRP machines, we can't safely call
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* OF once the kernel has been mapped to KERNELBASE. Therefore all
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* OF calls must be done within prom_init().
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*
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* ADDR is used in calls to call_prom. The 4th and following
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* arguments to call_prom should be 32-bit values.
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* On ppc64, 64 bit values are truncated to 32 bits (and
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* fortunately don't get interpreted as two arguments).
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*/
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#define ADDR(x) (u32)(unsigned long)(x)
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#ifdef CONFIG_PPC64
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#define OF_WORKAROUNDS 0
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#else
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#define OF_WORKAROUNDS of_workarounds
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static int of_workarounds __prombss;
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#endif
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#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
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#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
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#define PROM_BUG() do { \
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prom_printf("kernel BUG at %s line 0x%x!\n", \
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__FILE__, __LINE__); \
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__builtin_trap(); \
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} while (0)
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#ifdef DEBUG_PROM
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#define prom_debug(x...) prom_printf(x)
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#else
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#define prom_debug(x...) do { } while (0)
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#endif
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typedef u32 prom_arg_t;
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struct prom_args {
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__be32 service;
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__be32 nargs;
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__be32 nret;
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__be32 args[10];
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};
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struct prom_t {
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ihandle root;
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phandle chosen;
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int cpu;
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ihandle stdout;
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ihandle mmumap;
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ihandle memory;
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};
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struct mem_map_entry {
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__be64 base;
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__be64 size;
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};
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typedef __be32 cell_t;
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extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7, unsigned long r8,
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unsigned long r9);
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#ifdef CONFIG_PPC64
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extern int enter_prom(struct prom_args *args, unsigned long entry);
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#else
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static inline int enter_prom(struct prom_args *args, unsigned long entry)
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{
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return ((int (*)(struct prom_args *))entry)(args);
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}
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#endif
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extern void copy_and_flush(unsigned long dest, unsigned long src,
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unsigned long size, unsigned long offset);
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/* prom structure */
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static struct prom_t __prombss prom;
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static unsigned long __prombss prom_entry;
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static char __prombss of_stdout_device[256];
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static char __prombss prom_scratch[256];
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static unsigned long __prombss dt_header_start;
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static unsigned long __prombss dt_struct_start, dt_struct_end;
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static unsigned long __prombss dt_string_start, dt_string_end;
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static unsigned long __prombss prom_initrd_start, prom_initrd_end;
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#ifdef CONFIG_PPC64
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static int __prombss prom_iommu_force_on;
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static int __prombss prom_iommu_off;
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static unsigned long __prombss prom_tce_alloc_start;
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static unsigned long __prombss prom_tce_alloc_end;
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#endif
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#ifdef CONFIG_PPC_PSERIES
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static bool __prombss prom_radix_disable;
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static bool __prombss prom_xive_disable;
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#endif
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#ifdef CONFIG_PPC_SVM
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static bool __prombss prom_svm_enable;
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#endif
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struct platform_support {
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bool hash_mmu;
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bool radix_mmu;
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bool radix_gtse;
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bool xive;
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};
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/* Platforms codes are now obsolete in the kernel. Now only used within this
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* file and ultimately gone too. Feel free to change them if you need, they
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* are not shared with anything outside of this file anymore
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*/
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#define PLATFORM_PSERIES 0x0100
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#define PLATFORM_PSERIES_LPAR 0x0101
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#define PLATFORM_LPAR 0x0001
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#define PLATFORM_POWERMAC 0x0400
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#define PLATFORM_GENERIC 0x0500
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static int __prombss of_platform;
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static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
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static unsigned long __prombss prom_memory_limit;
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static unsigned long __prombss alloc_top;
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static unsigned long __prombss alloc_top_high;
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static unsigned long __prombss alloc_bottom;
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static unsigned long __prombss rmo_top;
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static unsigned long __prombss ram_top;
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static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
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static int __prombss mem_reserve_cnt;
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static cell_t __prombss regbuf[1024];
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static bool __prombss rtas_has_query_cpu_stopped;
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/*
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* Error results ... some OF calls will return "-1" on error, some
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* will return 0, some will return either. To simplify, here are
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* macros to use with any ihandle or phandle return value to check if
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* it is valid
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*/
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#define PROM_ERROR (-1u)
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#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
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#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
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/* Copied from lib/string.c and lib/kstrtox.c */
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static int __init prom_strcmp(const char *cs, const char *ct)
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{
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unsigned char c1, c2;
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while (1) {
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c1 = *cs++;
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c2 = *ct++;
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if (c1 != c2)
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return c1 < c2 ? -1 : 1;
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if (!c1)
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break;
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}
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return 0;
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}
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static char __init *prom_strcpy(char *dest, const char *src)
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{
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char *tmp = dest;
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while ((*dest++ = *src++) != '\0')
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/* nothing */;
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return tmp;
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}
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static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
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{
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unsigned char c1, c2;
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while (count) {
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c1 = *cs++;
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c2 = *ct++;
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if (c1 != c2)
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return c1 < c2 ? -1 : 1;
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if (!c1)
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break;
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count--;
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}
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return 0;
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}
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static size_t __init prom_strlen(const char *s)
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{
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const char *sc;
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for (sc = s; *sc != '\0'; ++sc)
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/* nothing */;
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return sc - s;
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}
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static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
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{
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const unsigned char *su1, *su2;
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int res = 0;
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for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
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if ((res = *su1 - *su2) != 0)
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break;
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return res;
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}
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static char __init *prom_strstr(const char *s1, const char *s2)
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{
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size_t l1, l2;
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l2 = prom_strlen(s2);
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if (!l2)
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return (char *)s1;
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l1 = prom_strlen(s1);
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while (l1 >= l2) {
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l1--;
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if (!prom_memcmp(s1, s2, l2))
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return (char *)s1;
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s1++;
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}
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return NULL;
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}
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static size_t __init prom_strlcpy(char *dest, const char *src, size_t size)
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{
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size_t ret = prom_strlen(src);
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if (size) {
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size_t len = (ret >= size) ? size - 1 : ret;
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memcpy(dest, src, len);
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dest[len] = '\0';
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}
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return ret;
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}
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#ifdef CONFIG_PPC_PSERIES
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static int __init prom_strtobool(const char *s, bool *res)
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{
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if (!s)
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return -EINVAL;
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switch (s[0]) {
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case 'y':
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case 'Y':
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case '1':
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*res = true;
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return 0;
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case 'n':
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case 'N':
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case '0':
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*res = false;
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return 0;
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case 'o':
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case 'O':
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switch (s[1]) {
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case 'n':
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case 'N':
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*res = true;
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return 0;
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case 'f':
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case 'F':
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*res = false;
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return 0;
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default:
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break;
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}
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default:
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break;
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}
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return -EINVAL;
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}
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#endif
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/* This is the one and *ONLY* place where we actually call open
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* firmware.
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*/
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static int __init call_prom(const char *service, int nargs, int nret, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = cpu_to_be32(ADDR(service));
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args.nargs = cpu_to_be32(nargs);
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args.nret = cpu_to_be32(nret);
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va_start(list, nret);
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for (i = 0; i < nargs; i++)
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args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
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va_end(list);
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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if (enter_prom(&args, prom_entry) < 0)
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return PROM_ERROR;
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return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
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}
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static int __init call_prom_ret(const char *service, int nargs, int nret,
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prom_arg_t *rets, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = cpu_to_be32(ADDR(service));
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args.nargs = cpu_to_be32(nargs);
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args.nret = cpu_to_be32(nret);
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va_start(list, rets);
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for (i = 0; i < nargs; i++)
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args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
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va_end(list);
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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if (enter_prom(&args, prom_entry) < 0)
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return PROM_ERROR;
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if (rets != NULL)
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for (i = 1; i < nret; ++i)
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rets[i-1] = be32_to_cpu(args.args[nargs+i]);
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return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
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}
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static void __init prom_print(const char *msg)
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{
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const char *p, *q;
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if (prom.stdout == 0)
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return;
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for (p = msg; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n'; ++q)
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;
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if (q > p)
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call_prom("write", 3, 1, prom.stdout, p, q - p);
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if (*q == 0)
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break;
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++q;
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call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
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}
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}
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/*
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* Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
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* we do not need __udivdi3 or __umoddi3 on 32bits.
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*/
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static void __init prom_print_hex(unsigned long val)
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{
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int i, nibbles = sizeof(val)*2;
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char buf[sizeof(val)*2+1];
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for (i = nibbles-1; i >= 0; i--) {
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buf[i] = (val & 0xf) + '0';
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if (buf[i] > '9')
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buf[i] += ('a'-'0'-10);
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val >>= 4;
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}
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buf[nibbles] = '\0';
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call_prom("write", 3, 1, prom.stdout, buf, nibbles);
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}
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/* max number of decimal digits in an unsigned long */
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#define UL_DIGITS 21
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static void __init prom_print_dec(unsigned long val)
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{
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int i, size;
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char buf[UL_DIGITS+1];
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for (i = UL_DIGITS-1; i >= 0; i--) {
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buf[i] = (val % 10) + '0';
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val = val/10;
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if (val == 0)
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break;
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}
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/* shift stuff down */
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size = UL_DIGITS - i;
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call_prom("write", 3, 1, prom.stdout, buf+i, size);
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}
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__printf(1, 2)
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static void __init prom_printf(const char *format, ...)
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{
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const char *p, *q, *s;
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va_list args;
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unsigned long v;
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long vs;
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int n = 0;
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va_start(args, format);
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for (p = format; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
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;
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if (q > p)
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call_prom("write", 3, 1, prom.stdout, p, q - p);
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if (*q == 0)
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break;
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if (*q == '\n') {
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++q;
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call_prom("write", 3, 1, prom.stdout,
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ADDR("\r\n"), 2);
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continue;
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}
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++q;
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if (*q == 0)
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break;
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while (*q == 'l') {
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++q;
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++n;
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}
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switch (*q) {
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case 's':
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++q;
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s = va_arg(args, const char *);
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prom_print(s);
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break;
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case 'x':
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++q;
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switch (n) {
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case 0:
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v = va_arg(args, unsigned int);
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break;
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case 1:
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v = va_arg(args, unsigned long);
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break;
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case 2:
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default:
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v = va_arg(args, unsigned long long);
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break;
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}
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prom_print_hex(v);
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break;
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case 'u':
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++q;
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switch (n) {
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case 0:
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v = va_arg(args, unsigned int);
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break;
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case 1:
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v = va_arg(args, unsigned long);
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break;
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case 2:
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default:
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v = va_arg(args, unsigned long long);
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break;
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}
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prom_print_dec(v);
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break;
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case 'd':
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++q;
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switch (n) {
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case 0:
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vs = va_arg(args, int);
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break;
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case 1:
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vs = va_arg(args, long);
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break;
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case 2:
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default:
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vs = va_arg(args, long long);
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break;
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}
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if (vs < 0) {
|
|
prom_print("-");
|
|
vs = -vs;
|
|
}
|
|
prom_print_dec(vs);
|
|
break;
|
|
}
|
|
}
|
|
va_end(args);
|
|
}
|
|
|
|
|
|
static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
|
|
unsigned long align)
|
|
{
|
|
|
|
if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
|
|
/*
|
|
* Old OF requires we claim physical and virtual separately
|
|
* and then map explicitly (assuming virtual mode)
|
|
*/
|
|
int ret;
|
|
prom_arg_t result;
|
|
|
|
ret = call_prom_ret("call-method", 5, 2, &result,
|
|
ADDR("claim"), prom.memory,
|
|
align, size, virt);
|
|
if (ret != 0 || result == -1)
|
|
return -1;
|
|
ret = call_prom_ret("call-method", 5, 2, &result,
|
|
ADDR("claim"), prom.mmumap,
|
|
align, size, virt);
|
|
if (ret != 0) {
|
|
call_prom("call-method", 4, 1, ADDR("release"),
|
|
prom.memory, size, virt);
|
|
return -1;
|
|
}
|
|
/* the 0x12 is M (coherence) + PP == read/write */
|
|
call_prom("call-method", 6, 1,
|
|
ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
|
|
return virt;
|
|
}
|
|
return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
|
|
(prom_arg_t)align);
|
|
}
|
|
|
|
static void __init __attribute__((noreturn)) prom_panic(const char *reason)
|
|
{
|
|
prom_print(reason);
|
|
/* Do not call exit because it clears the screen on pmac
|
|
* it also causes some sort of double-fault on early pmacs */
|
|
if (of_platform == PLATFORM_POWERMAC)
|
|
asm("trap\n");
|
|
|
|
/* ToDo: should put up an SRC here on pSeries */
|
|
call_prom("exit", 0, 0);
|
|
|
|
for (;;) /* should never get here */
|
|
;
|
|
}
|
|
|
|
|
|
static int __init prom_next_node(phandle *nodep)
|
|
{
|
|
phandle node;
|
|
|
|
if ((node = *nodep) != 0
|
|
&& (*nodep = call_prom("child", 1, 1, node)) != 0)
|
|
return 1;
|
|
if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
|
|
return 1;
|
|
for (;;) {
|
|
if ((node = call_prom("parent", 1, 1, node)) == 0)
|
|
return 0;
|
|
if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static inline int __init prom_getprop(phandle node, const char *pname,
|
|
void *value, size_t valuelen)
|
|
{
|
|
return call_prom("getprop", 4, 1, node, ADDR(pname),
|
|
(u32)(unsigned long) value, (u32) valuelen);
|
|
}
|
|
|
|
static inline int __init prom_getproplen(phandle node, const char *pname)
|
|
{
|
|
return call_prom("getproplen", 2, 1, node, ADDR(pname));
|
|
}
|
|
|
|
static void add_string(char **str, const char *q)
|
|
{
|
|
char *p = *str;
|
|
|
|
while (*q)
|
|
*p++ = *q++;
|
|
*p++ = ' ';
|
|
*str = p;
|
|
}
|
|
|
|
static char *tohex(unsigned int x)
|
|
{
|
|
static const char digits[] __initconst = "0123456789abcdef";
|
|
static char result[9] __prombss;
|
|
int i;
|
|
|
|
result[8] = 0;
|
|
i = 8;
|
|
do {
|
|
--i;
|
|
result[i] = digits[x & 0xf];
|
|
x >>= 4;
|
|
} while (x != 0 && i > 0);
|
|
return &result[i];
|
|
}
|
|
|
|
static int __init prom_setprop(phandle node, const char *nodename,
|
|
const char *pname, void *value, size_t valuelen)
|
|
{
|
|
char cmd[256], *p;
|
|
|
|
if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
|
|
return call_prom("setprop", 4, 1, node, ADDR(pname),
|
|
(u32)(unsigned long) value, (u32) valuelen);
|
|
|
|
/* gah... setprop doesn't work on longtrail, have to use interpret */
|
|
p = cmd;
|
|
add_string(&p, "dev");
|
|
add_string(&p, nodename);
|
|
add_string(&p, tohex((u32)(unsigned long) value));
|
|
add_string(&p, tohex(valuelen));
|
|
add_string(&p, tohex(ADDR(pname)));
|
|
add_string(&p, tohex(prom_strlen(pname)));
|
|
add_string(&p, "property");
|
|
*p = 0;
|
|
return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
|
|
}
|
|
|
|
/* We can't use the standard versions because of relocation headaches. */
|
|
#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
|
|
|| ('a' <= (c) && (c) <= 'f') \
|
|
|| ('A' <= (c) && (c) <= 'F'))
|
|
|
|
#define isdigit(c) ('0' <= (c) && (c) <= '9')
|
|
#define islower(c) ('a' <= (c) && (c) <= 'z')
|
|
#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
|
|
|
|
static unsigned long prom_strtoul(const char *cp, const char **endp)
|
|
{
|
|
unsigned long result = 0, base = 10, value;
|
|
|
|
if (*cp == '0') {
|
|
base = 8;
|
|
cp++;
|
|
if (toupper(*cp) == 'X') {
|
|
cp++;
|
|
base = 16;
|
|
}
|
|
}
|
|
|
|
while (isxdigit(*cp) &&
|
|
(value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
|
|
result = result * base + value;
|
|
cp++;
|
|
}
|
|
|
|
if (endp)
|
|
*endp = cp;
|
|
|
|
return result;
|
|
}
|
|
|
|
static unsigned long prom_memparse(const char *ptr, const char **retptr)
|
|
{
|
|
unsigned long ret = prom_strtoul(ptr, retptr);
|
|
int shift = 0;
|
|
|
|
/*
|
|
* We can't use a switch here because GCC *may* generate a
|
|
* jump table which won't work, because we're not running at
|
|
* the address we're linked at.
|
|
*/
|
|
if ('G' == **retptr || 'g' == **retptr)
|
|
shift = 30;
|
|
|
|
if ('M' == **retptr || 'm' == **retptr)
|
|
shift = 20;
|
|
|
|
if ('K' == **retptr || 'k' == **retptr)
|
|
shift = 10;
|
|
|
|
if (shift) {
|
|
ret <<= shift;
|
|
(*retptr)++;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Early parsing of the command line passed to the kernel, used for
|
|
* "mem=x" and the options that affect the iommu
|
|
*/
|
|
static void __init early_cmdline_parse(void)
|
|
{
|
|
const char *opt;
|
|
|
|
char *p;
|
|
int l = 0;
|
|
|
|
prom_cmd_line[0] = 0;
|
|
p = prom_cmd_line;
|
|
if ((long)prom.chosen > 0)
|
|
l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
|
|
if (IS_ENABLED(CONFIG_CMDLINE_BOOL) && (l <= 0 || p[0] == '\0')) /* dbl check */
|
|
prom_strlcpy(prom_cmd_line, CONFIG_CMDLINE, sizeof(prom_cmd_line));
|
|
prom_printf("command line: %s\n", prom_cmd_line);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
opt = prom_strstr(prom_cmd_line, "iommu=");
|
|
if (opt) {
|
|
prom_printf("iommu opt is: %s\n", opt);
|
|
opt += 6;
|
|
while (*opt && *opt == ' ')
|
|
opt++;
|
|
if (!prom_strncmp(opt, "off", 3))
|
|
prom_iommu_off = 1;
|
|
else if (!prom_strncmp(opt, "force", 5))
|
|
prom_iommu_force_on = 1;
|
|
}
|
|
#endif
|
|
opt = prom_strstr(prom_cmd_line, "mem=");
|
|
if (opt) {
|
|
opt += 4;
|
|
prom_memory_limit = prom_memparse(opt, (const char **)&opt);
|
|
#ifdef CONFIG_PPC64
|
|
/* Align to 16 MB == size of ppc64 large page */
|
|
prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
|
|
opt = prom_strstr(prom_cmd_line, "disable_radix");
|
|
if (opt) {
|
|
opt += 13;
|
|
if (*opt && *opt == '=') {
|
|
bool val;
|
|
|
|
if (prom_strtobool(++opt, &val))
|
|
prom_radix_disable = false;
|
|
else
|
|
prom_radix_disable = val;
|
|
} else
|
|
prom_radix_disable = true;
|
|
}
|
|
if (prom_radix_disable)
|
|
prom_debug("Radix disabled from cmdline\n");
|
|
|
|
opt = prom_strstr(prom_cmd_line, "xive=off");
|
|
if (opt) {
|
|
prom_xive_disable = true;
|
|
prom_debug("XIVE disabled from cmdline\n");
|
|
}
|
|
#endif /* CONFIG_PPC_PSERIES */
|
|
|
|
#ifdef CONFIG_PPC_SVM
|
|
opt = prom_strstr(prom_cmd_line, "svm=");
|
|
if (opt) {
|
|
bool val;
|
|
|
|
opt += sizeof("svm=") - 1;
|
|
if (!prom_strtobool(opt, &val))
|
|
prom_svm_enable = val;
|
|
}
|
|
#endif /* CONFIG_PPC_SVM */
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
/*
|
|
* The architecture vector has an array of PVR mask/value pairs,
|
|
* followed by # option vectors - 1, followed by the option vectors.
|
|
*
|
|
* See prom.h for the definition of the bits specified in the
|
|
* architecture vector.
|
|
*/
|
|
|
|
/* Firmware expects the value to be n - 1, where n is the # of vectors */
|
|
#define NUM_VECTORS(n) ((n) - 1)
|
|
|
|
/*
|
|
* Firmware expects 1 + n - 2, where n is the length of the option vector in
|
|
* bytes. The 1 accounts for the length byte itself, the - 2 .. ?
|
|
*/
|
|
#define VECTOR_LENGTH(n) (1 + (n) - 2)
|
|
|
|
struct option_vector1 {
|
|
u8 byte1;
|
|
u8 arch_versions;
|
|
u8 arch_versions3;
|
|
} __packed;
|
|
|
|
struct option_vector2 {
|
|
u8 byte1;
|
|
__be16 reserved;
|
|
__be32 real_base;
|
|
__be32 real_size;
|
|
__be32 virt_base;
|
|
__be32 virt_size;
|
|
__be32 load_base;
|
|
__be32 min_rma;
|
|
__be32 min_load;
|
|
u8 min_rma_percent;
|
|
u8 max_pft_size;
|
|
} __packed;
|
|
|
|
struct option_vector3 {
|
|
u8 byte1;
|
|
u8 byte2;
|
|
} __packed;
|
|
|
|
struct option_vector4 {
|
|
u8 byte1;
|
|
u8 min_vp_cap;
|
|
} __packed;
|
|
|
|
struct option_vector5 {
|
|
u8 byte1;
|
|
u8 byte2;
|
|
u8 byte3;
|
|
u8 cmo;
|
|
u8 associativity;
|
|
u8 bin_opts;
|
|
u8 micro_checkpoint;
|
|
u8 reserved0;
|
|
__be32 max_cpus;
|
|
__be16 papr_level;
|
|
__be16 reserved1;
|
|
u8 platform_facilities;
|
|
u8 reserved2;
|
|
__be16 reserved3;
|
|
u8 subprocessors;
|
|
u8 byte22;
|
|
u8 intarch;
|
|
u8 mmu;
|
|
u8 hash_ext;
|
|
u8 radix_ext;
|
|
} __packed;
|
|
|
|
struct option_vector6 {
|
|
u8 reserved;
|
|
u8 secondary_pteg;
|
|
u8 os_name;
|
|
} __packed;
|
|
|
|
struct ibm_arch_vec {
|
|
struct { u32 mask, val; } pvrs[12];
|
|
|
|
u8 num_vectors;
|
|
|
|
u8 vec1_len;
|
|
struct option_vector1 vec1;
|
|
|
|
u8 vec2_len;
|
|
struct option_vector2 vec2;
|
|
|
|
u8 vec3_len;
|
|
struct option_vector3 vec3;
|
|
|
|
u8 vec4_len;
|
|
struct option_vector4 vec4;
|
|
|
|
u8 vec5_len;
|
|
struct option_vector5 vec5;
|
|
|
|
u8 vec6_len;
|
|
struct option_vector6 vec6;
|
|
} __packed;
|
|
|
|
static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
|
|
.pvrs = {
|
|
{
|
|
.mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
|
|
.val = cpu_to_be32(0x003a0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffff0000), /* POWER6 */
|
|
.val = cpu_to_be32(0x003e0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffff0000), /* POWER7 */
|
|
.val = cpu_to_be32(0x003f0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffff0000), /* POWER8E */
|
|
.val = cpu_to_be32(0x004b0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
|
|
.val = cpu_to_be32(0x004c0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffff0000), /* POWER8 */
|
|
.val = cpu_to_be32(0x004d0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffff0000), /* POWER9 */
|
|
.val = cpu_to_be32(0x004e0000),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
|
|
.val = cpu_to_be32(0x0f000005),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
|
|
.val = cpu_to_be32(0x0f000004),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
|
|
.val = cpu_to_be32(0x0f000003),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
|
|
.val = cpu_to_be32(0x0f000002),
|
|
},
|
|
{
|
|
.mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
|
|
.val = cpu_to_be32(0x0f000001),
|
|
},
|
|
},
|
|
|
|
.num_vectors = NUM_VECTORS(6),
|
|
|
|
.vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
|
|
.vec1 = {
|
|
.byte1 = 0,
|
|
.arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
|
|
OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
|
|
.arch_versions3 = OV1_PPC_3_00,
|
|
},
|
|
|
|
.vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
|
|
/* option vector 2: Open Firmware options supported */
|
|
.vec2 = {
|
|
.byte1 = OV2_REAL_MODE,
|
|
.reserved = 0,
|
|
.real_base = cpu_to_be32(0xffffffff),
|
|
.real_size = cpu_to_be32(0xffffffff),
|
|
.virt_base = cpu_to_be32(0xffffffff),
|
|
.virt_size = cpu_to_be32(0xffffffff),
|
|
.load_base = cpu_to_be32(0xffffffff),
|
|
.min_rma = cpu_to_be32(512), /* 512MB min RMA */
|
|
.min_load = cpu_to_be32(0xffffffff), /* full client load */
|
|
.min_rma_percent = 0, /* min RMA percentage of total RAM */
|
|
.max_pft_size = 48, /* max log_2(hash table size) */
|
|
},
|
|
|
|
.vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
|
|
/* option vector 3: processor options supported */
|
|
.vec3 = {
|
|
.byte1 = 0, /* don't ignore, don't halt */
|
|
.byte2 = OV3_FP | OV3_VMX | OV3_DFP,
|
|
},
|
|
|
|
.vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
|
|
/* option vector 4: IBM PAPR implementation */
|
|
.vec4 = {
|
|
.byte1 = 0, /* don't halt */
|
|
.min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
|
|
},
|
|
|
|
.vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
|
|
/* option vector 5: PAPR/OF options */
|
|
.vec5 = {
|
|
.byte1 = 0, /* don't ignore, don't halt */
|
|
.byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
|
|
OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
|
|
#ifdef CONFIG_PCI_MSI
|
|
/* PCIe/MSI support. Without MSI full PCIe is not supported */
|
|
OV5_FEAT(OV5_MSI),
|
|
#else
|
|
0,
|
|
#endif
|
|
.byte3 = 0,
|
|
.cmo =
|
|
#ifdef CONFIG_PPC_SMLPAR
|
|
OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
|
|
#else
|
|
0,
|
|
#endif
|
|
.associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
|
|
.bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
|
|
.micro_checkpoint = 0,
|
|
.reserved0 = 0,
|
|
.max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
|
|
.papr_level = 0,
|
|
.reserved1 = 0,
|
|
.platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
|
|
.reserved2 = 0,
|
|
.reserved3 = 0,
|
|
.subprocessors = 1,
|
|
.byte22 = OV5_FEAT(OV5_DRMEM_V2),
|
|
.intarch = 0,
|
|
.mmu = 0,
|
|
.hash_ext = 0,
|
|
.radix_ext = 0,
|
|
},
|
|
|
|
/* option vector 6: IBM PAPR hints */
|
|
.vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
|
|
.vec6 = {
|
|
.reserved = 0,
|
|
.secondary_pteg = 0,
|
|
.os_name = OV6_LINUX,
|
|
},
|
|
};
|
|
|
|
static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
|
|
|
|
/* Old method - ELF header with PT_NOTE sections only works on BE */
|
|
#ifdef __BIG_ENDIAN__
|
|
static const struct fake_elf {
|
|
Elf32_Ehdr elfhdr;
|
|
Elf32_Phdr phdr[2];
|
|
struct chrpnote {
|
|
u32 namesz;
|
|
u32 descsz;
|
|
u32 type;
|
|
char name[8]; /* "PowerPC" */
|
|
struct chrpdesc {
|
|
u32 real_mode;
|
|
u32 real_base;
|
|
u32 real_size;
|
|
u32 virt_base;
|
|
u32 virt_size;
|
|
u32 load_base;
|
|
} chrpdesc;
|
|
} chrpnote;
|
|
struct rpanote {
|
|
u32 namesz;
|
|
u32 descsz;
|
|
u32 type;
|
|
char name[24]; /* "IBM,RPA-Client-Config" */
|
|
struct rpadesc {
|
|
u32 lpar_affinity;
|
|
u32 min_rmo_size;
|
|
u32 min_rmo_percent;
|
|
u32 max_pft_size;
|
|
u32 splpar;
|
|
u32 min_load;
|
|
u32 new_mem_def;
|
|
u32 ignore_me;
|
|
} rpadesc;
|
|
} rpanote;
|
|
} fake_elf __initconst = {
|
|
.elfhdr = {
|
|
.e_ident = { 0x7f, 'E', 'L', 'F',
|
|
ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
|
|
.e_type = ET_EXEC, /* yeah right */
|
|
.e_machine = EM_PPC,
|
|
.e_version = EV_CURRENT,
|
|
.e_phoff = offsetof(struct fake_elf, phdr),
|
|
.e_phentsize = sizeof(Elf32_Phdr),
|
|
.e_phnum = 2
|
|
},
|
|
.phdr = {
|
|
[0] = {
|
|
.p_type = PT_NOTE,
|
|
.p_offset = offsetof(struct fake_elf, chrpnote),
|
|
.p_filesz = sizeof(struct chrpnote)
|
|
}, [1] = {
|
|
.p_type = PT_NOTE,
|
|
.p_offset = offsetof(struct fake_elf, rpanote),
|
|
.p_filesz = sizeof(struct rpanote)
|
|
}
|
|
},
|
|
.chrpnote = {
|
|
.namesz = sizeof("PowerPC"),
|
|
.descsz = sizeof(struct chrpdesc),
|
|
.type = 0x1275,
|
|
.name = "PowerPC",
|
|
.chrpdesc = {
|
|
.real_mode = ~0U, /* ~0 means "don't care" */
|
|
.real_base = ~0U,
|
|
.real_size = ~0U,
|
|
.virt_base = ~0U,
|
|
.virt_size = ~0U,
|
|
.load_base = ~0U
|
|
},
|
|
},
|
|
.rpanote = {
|
|
.namesz = sizeof("IBM,RPA-Client-Config"),
|
|
.descsz = sizeof(struct rpadesc),
|
|
.type = 0x12759999,
|
|
.name = "IBM,RPA-Client-Config",
|
|
.rpadesc = {
|
|
.lpar_affinity = 0,
|
|
.min_rmo_size = 64, /* in megabytes */
|
|
.min_rmo_percent = 0,
|
|
.max_pft_size = 48, /* 2^48 bytes max PFT size */
|
|
.splpar = 1,
|
|
.min_load = ~0U,
|
|
.new_mem_def = 0
|
|
}
|
|
}
|
|
};
|
|
#endif /* __BIG_ENDIAN__ */
|
|
|
|
static int __init prom_count_smt_threads(void)
|
|
{
|
|
phandle node;
|
|
char type[64];
|
|
unsigned int plen;
|
|
|
|
/* Pick up th first CPU node we can find */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
if (prom_strcmp(type, "cpu"))
|
|
continue;
|
|
/*
|
|
* There is an entry for each smt thread, each entry being
|
|
* 4 bytes long. All cpus should have the same number of
|
|
* smt threads, so return after finding the first.
|
|
*/
|
|
plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
|
|
if (plen == PROM_ERROR)
|
|
break;
|
|
plen >>= 2;
|
|
prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
|
|
|
|
/* Sanity check */
|
|
if (plen < 1 || plen > 64) {
|
|
prom_printf("Threads per core %lu out of bounds, assuming 1\n",
|
|
(unsigned long)plen);
|
|
return 1;
|
|
}
|
|
return plen;
|
|
}
|
|
prom_debug("No threads found, assuming 1 per core\n");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
static void __init prom_parse_mmu_model(u8 val,
|
|
struct platform_support *support)
|
|
{
|
|
switch (val) {
|
|
case OV5_FEAT(OV5_MMU_DYNAMIC):
|
|
case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
|
|
prom_debug("MMU - either supported\n");
|
|
support->radix_mmu = !prom_radix_disable;
|
|
support->hash_mmu = true;
|
|
break;
|
|
case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
|
|
prom_debug("MMU - radix only\n");
|
|
if (prom_radix_disable) {
|
|
/*
|
|
* If we __have__ to do radix, we're better off ignoring
|
|
* the command line rather than not booting.
|
|
*/
|
|
prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
|
|
}
|
|
support->radix_mmu = true;
|
|
break;
|
|
case OV5_FEAT(OV5_MMU_HASH):
|
|
prom_debug("MMU - hash only\n");
|
|
support->hash_mmu = true;
|
|
break;
|
|
default:
|
|
prom_debug("Unknown mmu support option: 0x%x\n", val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void __init prom_parse_xive_model(u8 val,
|
|
struct platform_support *support)
|
|
{
|
|
switch (val) {
|
|
case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
|
|
prom_debug("XIVE - either mode supported\n");
|
|
support->xive = !prom_xive_disable;
|
|
break;
|
|
case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
|
|
prom_debug("XIVE - exploitation mode supported\n");
|
|
if (prom_xive_disable) {
|
|
/*
|
|
* If we __have__ to do XIVE, we're better off ignoring
|
|
* the command line rather than not booting.
|
|
*/
|
|
prom_printf("WARNING: Ignoring cmdline option xive=off\n");
|
|
}
|
|
support->xive = true;
|
|
break;
|
|
case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
|
|
prom_debug("XIVE - legacy mode supported\n");
|
|
break;
|
|
default:
|
|
prom_debug("Unknown xive support option: 0x%x\n", val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void __init prom_parse_platform_support(u8 index, u8 val,
|
|
struct platform_support *support)
|
|
{
|
|
switch (index) {
|
|
case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
|
|
prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
|
|
break;
|
|
case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
|
|
if (val & OV5_FEAT(OV5_RADIX_GTSE)) {
|
|
prom_debug("Radix - GTSE supported\n");
|
|
support->radix_gtse = true;
|
|
}
|
|
break;
|
|
case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
|
|
prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
|
|
support);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void __init prom_check_platform_support(void)
|
|
{
|
|
struct platform_support supported = {
|
|
.hash_mmu = false,
|
|
.radix_mmu = false,
|
|
.radix_gtse = false,
|
|
.xive = false
|
|
};
|
|
int prop_len = prom_getproplen(prom.chosen,
|
|
"ibm,arch-vec-5-platform-support");
|
|
|
|
/*
|
|
* First copy the architecture vec template
|
|
*
|
|
* use memcpy() instead of *vec = *vec_template so that GCC replaces it
|
|
* by __memcpy() when KASAN is active
|
|
*/
|
|
memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
|
|
sizeof(ibm_architecture_vec));
|
|
|
|
if (prop_len > 1) {
|
|
int i;
|
|
u8 vec[8];
|
|
prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
|
|
prop_len);
|
|
if (prop_len > sizeof(vec))
|
|
prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
|
|
prop_len);
|
|
prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
|
|
&vec, sizeof(vec));
|
|
for (i = 0; i < sizeof(vec); i += 2) {
|
|
prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
|
|
, vec[i]
|
|
, vec[i + 1]);
|
|
prom_parse_platform_support(vec[i], vec[i + 1],
|
|
&supported);
|
|
}
|
|
}
|
|
|
|
if (supported.radix_mmu && supported.radix_gtse &&
|
|
IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
|
|
/* Radix preferred - but we require GTSE for now */
|
|
prom_debug("Asking for radix with GTSE\n");
|
|
ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
|
|
ibm_architecture_vec.vec5.radix_ext = OV5_FEAT(OV5_RADIX_GTSE);
|
|
} else if (supported.hash_mmu) {
|
|
/* Default to hash mmu (if we can) */
|
|
prom_debug("Asking for hash\n");
|
|
ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
|
|
} else {
|
|
/* We're probably on a legacy hypervisor */
|
|
prom_debug("Assuming legacy hash support\n");
|
|
}
|
|
|
|
if (supported.xive) {
|
|
prom_debug("Asking for XIVE\n");
|
|
ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
|
|
}
|
|
}
|
|
|
|
static void __init prom_send_capabilities(void)
|
|
{
|
|
ihandle root;
|
|
prom_arg_t ret;
|
|
u32 cores;
|
|
|
|
/* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
|
|
prom_check_platform_support();
|
|
|
|
root = call_prom("open", 1, 1, ADDR("/"));
|
|
if (root != 0) {
|
|
/* We need to tell the FW about the number of cores we support.
|
|
*
|
|
* To do that, we count the number of threads on the first core
|
|
* (we assume this is the same for all cores) and use it to
|
|
* divide NR_CPUS.
|
|
*/
|
|
|
|
cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
|
|
prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
|
|
cores, NR_CPUS);
|
|
|
|
ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
|
|
|
|
/* try calling the ibm,client-architecture-support method */
|
|
prom_printf("Calling ibm,client-architecture-support...");
|
|
if (call_prom_ret("call-method", 3, 2, &ret,
|
|
ADDR("ibm,client-architecture-support"),
|
|
root,
|
|
ADDR(&ibm_architecture_vec)) == 0) {
|
|
/* the call exists... */
|
|
if (ret)
|
|
prom_printf("\nWARNING: ibm,client-architecture"
|
|
"-support call FAILED!\n");
|
|
call_prom("close", 1, 0, root);
|
|
prom_printf(" done\n");
|
|
return;
|
|
}
|
|
call_prom("close", 1, 0, root);
|
|
prom_printf(" not implemented\n");
|
|
}
|
|
|
|
#ifdef __BIG_ENDIAN__
|
|
{
|
|
ihandle elfloader;
|
|
|
|
/* no ibm,client-architecture-support call, try the old way */
|
|
elfloader = call_prom("open", 1, 1,
|
|
ADDR("/packages/elf-loader"));
|
|
if (elfloader == 0) {
|
|
prom_printf("couldn't open /packages/elf-loader\n");
|
|
return;
|
|
}
|
|
call_prom("call-method", 3, 1, ADDR("process-elf-header"),
|
|
elfloader, ADDR(&fake_elf));
|
|
call_prom("close", 1, 0, elfloader);
|
|
}
|
|
#endif /* __BIG_ENDIAN__ */
|
|
}
|
|
#endif /* CONFIG_PPC_PSERIES */
|
|
|
|
/*
|
|
* Memory allocation strategy... our layout is normally:
|
|
*
|
|
* at 14Mb or more we have vmlinux, then a gap and initrd. In some
|
|
* rare cases, initrd might end up being before the kernel though.
|
|
* We assume this won't override the final kernel at 0, we have no
|
|
* provision to handle that in this version, but it should hopefully
|
|
* never happen.
|
|
*
|
|
* alloc_top is set to the top of RMO, eventually shrink down if the
|
|
* TCEs overlap
|
|
*
|
|
* alloc_bottom is set to the top of kernel/initrd
|
|
*
|
|
* from there, allocations are done this way : rtas is allocated
|
|
* topmost, and the device-tree is allocated from the bottom. We try
|
|
* to grow the device-tree allocation as we progress. If we can't,
|
|
* then we fail, we don't currently have a facility to restart
|
|
* elsewhere, but that shouldn't be necessary.
|
|
*
|
|
* Note that calls to reserve_mem have to be done explicitly, memory
|
|
* allocated with either alloc_up or alloc_down isn't automatically
|
|
* reserved.
|
|
*/
|
|
|
|
|
|
/*
|
|
* Allocates memory in the RMO upward from the kernel/initrd
|
|
*
|
|
* When align is 0, this is a special case, it means to allocate in place
|
|
* at the current location of alloc_bottom or fail (that is basically
|
|
* extending the previous allocation). Used for the device-tree flattening
|
|
*/
|
|
static unsigned long __init alloc_up(unsigned long size, unsigned long align)
|
|
{
|
|
unsigned long base = alloc_bottom;
|
|
unsigned long addr = 0;
|
|
|
|
if (align)
|
|
base = _ALIGN_UP(base, align);
|
|
prom_debug("%s(%lx, %lx)\n", __func__, size, align);
|
|
if (ram_top == 0)
|
|
prom_panic("alloc_up() called with mem not initialized\n");
|
|
|
|
if (align)
|
|
base = _ALIGN_UP(alloc_bottom, align);
|
|
else
|
|
base = alloc_bottom;
|
|
|
|
for(; (base + size) <= alloc_top;
|
|
base = _ALIGN_UP(base + 0x100000, align)) {
|
|
prom_debug(" trying: 0x%lx\n\r", base);
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
|
if (addr != PROM_ERROR && addr != 0)
|
|
break;
|
|
addr = 0;
|
|
if (align == 0)
|
|
break;
|
|
}
|
|
if (addr == 0)
|
|
return 0;
|
|
alloc_bottom = addr + size;
|
|
|
|
prom_debug(" -> %lx\n", addr);
|
|
prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
|
|
prom_debug(" alloc_top : %lx\n", alloc_top);
|
|
prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
|
|
prom_debug(" rmo_top : %lx\n", rmo_top);
|
|
prom_debug(" ram_top : %lx\n", ram_top);
|
|
|
|
return addr;
|
|
}
|
|
|
|
/*
|
|
* Allocates memory downward, either from top of RMO, or if highmem
|
|
* is set, from the top of RAM. Note that this one doesn't handle
|
|
* failures. It does claim memory if highmem is not set.
|
|
*/
|
|
static unsigned long __init alloc_down(unsigned long size, unsigned long align,
|
|
int highmem)
|
|
{
|
|
unsigned long base, addr = 0;
|
|
|
|
prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
|
|
highmem ? "(high)" : "(low)");
|
|
if (ram_top == 0)
|
|
prom_panic("alloc_down() called with mem not initialized\n");
|
|
|
|
if (highmem) {
|
|
/* Carve out storage for the TCE table. */
|
|
addr = _ALIGN_DOWN(alloc_top_high - size, align);
|
|
if (addr <= alloc_bottom)
|
|
return 0;
|
|
/* Will we bump into the RMO ? If yes, check out that we
|
|
* didn't overlap existing allocations there, if we did,
|
|
* we are dead, we must be the first in town !
|
|
*/
|
|
if (addr < rmo_top) {
|
|
/* Good, we are first */
|
|
if (alloc_top == rmo_top)
|
|
alloc_top = rmo_top = addr;
|
|
else
|
|
return 0;
|
|
}
|
|
alloc_top_high = addr;
|
|
goto bail;
|
|
}
|
|
|
|
base = _ALIGN_DOWN(alloc_top - size, align);
|
|
for (; base > alloc_bottom;
|
|
base = _ALIGN_DOWN(base - 0x100000, align)) {
|
|
prom_debug(" trying: 0x%lx\n\r", base);
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
|
if (addr != PROM_ERROR && addr != 0)
|
|
break;
|
|
addr = 0;
|
|
}
|
|
if (addr == 0)
|
|
return 0;
|
|
alloc_top = addr;
|
|
|
|
bail:
|
|
prom_debug(" -> %lx\n", addr);
|
|
prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
|
|
prom_debug(" alloc_top : %lx\n", alloc_top);
|
|
prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
|
|
prom_debug(" rmo_top : %lx\n", rmo_top);
|
|
prom_debug(" ram_top : %lx\n", ram_top);
|
|
|
|
return addr;
|
|
}
|
|
|
|
/*
|
|
* Parse a "reg" cell
|
|
*/
|
|
static unsigned long __init prom_next_cell(int s, cell_t **cellp)
|
|
{
|
|
cell_t *p = *cellp;
|
|
unsigned long r = 0;
|
|
|
|
/* Ignore more than 2 cells */
|
|
while (s > sizeof(unsigned long) / 4) {
|
|
p++;
|
|
s--;
|
|
}
|
|
r = be32_to_cpu(*p++);
|
|
#ifdef CONFIG_PPC64
|
|
if (s > 1) {
|
|
r <<= 32;
|
|
r |= be32_to_cpu(*(p++));
|
|
}
|
|
#endif
|
|
*cellp = p;
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Very dumb function for adding to the memory reserve list, but
|
|
* we don't need anything smarter at this point
|
|
*
|
|
* XXX Eventually check for collisions. They should NEVER happen.
|
|
* If problems seem to show up, it would be a good start to track
|
|
* them down.
|
|
*/
|
|
static void __init reserve_mem(u64 base, u64 size)
|
|
{
|
|
u64 top = base + size;
|
|
unsigned long cnt = mem_reserve_cnt;
|
|
|
|
if (size == 0)
|
|
return;
|
|
|
|
/* We need to always keep one empty entry so that we
|
|
* have our terminator with "size" set to 0 since we are
|
|
* dumb and just copy this entire array to the boot params
|
|
*/
|
|
base = _ALIGN_DOWN(base, PAGE_SIZE);
|
|
top = _ALIGN_UP(top, PAGE_SIZE);
|
|
size = top - base;
|
|
|
|
if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
|
|
prom_panic("Memory reserve map exhausted !\n");
|
|
mem_reserve_map[cnt].base = cpu_to_be64(base);
|
|
mem_reserve_map[cnt].size = cpu_to_be64(size);
|
|
mem_reserve_cnt = cnt + 1;
|
|
}
|
|
|
|
/*
|
|
* Initialize memory allocation mechanism, parse "memory" nodes and
|
|
* obtain that way the top of memory and RMO to setup out local allocator
|
|
*/
|
|
static void __init prom_init_mem(void)
|
|
{
|
|
phandle node;
|
|
char type[64];
|
|
unsigned int plen;
|
|
cell_t *p, *endp;
|
|
__be32 val;
|
|
u32 rac, rsc;
|
|
|
|
/*
|
|
* We iterate the memory nodes to find
|
|
* 1) top of RMO (first node)
|
|
* 2) top of memory
|
|
*/
|
|
val = cpu_to_be32(2);
|
|
prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
|
|
rac = be32_to_cpu(val);
|
|
val = cpu_to_be32(1);
|
|
prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
|
|
rsc = be32_to_cpu(val);
|
|
prom_debug("root_addr_cells: %x\n", rac);
|
|
prom_debug("root_size_cells: %x\n", rsc);
|
|
|
|
prom_debug("scanning memory:\n");
|
|
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
|
|
if (type[0] == 0) {
|
|
/*
|
|
* CHRP Longtrail machines have no device_type
|
|
* on the memory node, so check the name instead...
|
|
*/
|
|
prom_getprop(node, "name", type, sizeof(type));
|
|
}
|
|
if (prom_strcmp(type, "memory"))
|
|
continue;
|
|
|
|
plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
|
|
if (plen > sizeof(regbuf)) {
|
|
prom_printf("memory node too large for buffer !\n");
|
|
plen = sizeof(regbuf);
|
|
}
|
|
p = regbuf;
|
|
endp = p + (plen / sizeof(cell_t));
|
|
|
|
#ifdef DEBUG_PROM
|
|
memset(prom_scratch, 0, sizeof(prom_scratch));
|
|
call_prom("package-to-path", 3, 1, node, prom_scratch,
|
|
sizeof(prom_scratch) - 1);
|
|
prom_debug(" node %s :\n", prom_scratch);
|
|
#endif /* DEBUG_PROM */
|
|
|
|
while ((endp - p) >= (rac + rsc)) {
|
|
unsigned long base, size;
|
|
|
|
base = prom_next_cell(rac, &p);
|
|
size = prom_next_cell(rsc, &p);
|
|
|
|
if (size == 0)
|
|
continue;
|
|
prom_debug(" %lx %lx\n", base, size);
|
|
if (base == 0 && (of_platform & PLATFORM_LPAR))
|
|
rmo_top = size;
|
|
if ((base + size) > ram_top)
|
|
ram_top = base + size;
|
|
}
|
|
}
|
|
|
|
alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
|
|
|
|
/*
|
|
* If prom_memory_limit is set we reduce the upper limits *except* for
|
|
* alloc_top_high. This must be the real top of RAM so we can put
|
|
* TCE's up there.
|
|
*/
|
|
|
|
alloc_top_high = ram_top;
|
|
|
|
if (prom_memory_limit) {
|
|
if (prom_memory_limit <= alloc_bottom) {
|
|
prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
|
|
prom_memory_limit);
|
|
prom_memory_limit = 0;
|
|
} else if (prom_memory_limit >= ram_top) {
|
|
prom_printf("Ignoring mem=%lx >= ram_top.\n",
|
|
prom_memory_limit);
|
|
prom_memory_limit = 0;
|
|
} else {
|
|
ram_top = prom_memory_limit;
|
|
rmo_top = min(rmo_top, prom_memory_limit);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Setup our top alloc point, that is top of RMO or top of
|
|
* segment 0 when running non-LPAR.
|
|
* Some RS64 machines have buggy firmware where claims up at
|
|
* 1GB fail. Cap at 768MB as a workaround.
|
|
* Since 768MB is plenty of room, and we need to cap to something
|
|
* reasonable on 32-bit, cap at 768MB on all machines.
|
|
*/
|
|
if (!rmo_top)
|
|
rmo_top = ram_top;
|
|
rmo_top = min(0x30000000ul, rmo_top);
|
|
alloc_top = rmo_top;
|
|
alloc_top_high = ram_top;
|
|
|
|
/*
|
|
* Check if we have an initrd after the kernel but still inside
|
|
* the RMO. If we do move our bottom point to after it.
|
|
*/
|
|
if (prom_initrd_start &&
|
|
prom_initrd_start < rmo_top &&
|
|
prom_initrd_end > alloc_bottom)
|
|
alloc_bottom = PAGE_ALIGN(prom_initrd_end);
|
|
|
|
prom_printf("memory layout at init:\n");
|
|
prom_printf(" memory_limit : %lx (16 MB aligned)\n",
|
|
prom_memory_limit);
|
|
prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
|
|
prom_printf(" alloc_top : %lx\n", alloc_top);
|
|
prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
|
|
prom_printf(" rmo_top : %lx\n", rmo_top);
|
|
prom_printf(" ram_top : %lx\n", ram_top);
|
|
}
|
|
|
|
static void __init prom_close_stdin(void)
|
|
{
|
|
__be32 val;
|
|
ihandle stdin;
|
|
|
|
if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
|
|
stdin = be32_to_cpu(val);
|
|
call_prom("close", 1, 0, stdin);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_SVM
|
|
static int prom_rtas_hcall(uint64_t args)
|
|
{
|
|
register uint64_t arg1 asm("r3") = H_RTAS;
|
|
register uint64_t arg2 asm("r4") = args;
|
|
|
|
asm volatile("sc 1\n" : "=r" (arg1) :
|
|
"r" (arg1),
|
|
"r" (arg2) :);
|
|
return arg1;
|
|
}
|
|
|
|
static struct rtas_args __prombss os_term_args;
|
|
|
|
static void __init prom_rtas_os_term(char *str)
|
|
{
|
|
phandle rtas_node;
|
|
__be32 val;
|
|
u32 token;
|
|
|
|
prom_debug("%s: start...\n", __func__);
|
|
rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
|
prom_debug("rtas_node: %x\n", rtas_node);
|
|
if (!PHANDLE_VALID(rtas_node))
|
|
return;
|
|
|
|
val = 0;
|
|
prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
|
|
token = be32_to_cpu(val);
|
|
prom_debug("ibm,os-term: %x\n", token);
|
|
if (token == 0)
|
|
prom_panic("Could not get token for ibm,os-term\n");
|
|
os_term_args.token = cpu_to_be32(token);
|
|
prom_rtas_hcall((uint64_t)&os_term_args);
|
|
}
|
|
#endif /* CONFIG_PPC_SVM */
|
|
|
|
/*
|
|
* Allocate room for and instantiate RTAS
|
|
*/
|
|
static void __init prom_instantiate_rtas(void)
|
|
{
|
|
phandle rtas_node;
|
|
ihandle rtas_inst;
|
|
u32 base, entry = 0;
|
|
__be32 val;
|
|
u32 size = 0;
|
|
|
|
prom_debug("prom_instantiate_rtas: start...\n");
|
|
|
|
rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
|
prom_debug("rtas_node: %x\n", rtas_node);
|
|
if (!PHANDLE_VALID(rtas_node))
|
|
return;
|
|
|
|
val = 0;
|
|
prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
|
|
size = be32_to_cpu(val);
|
|
if (size == 0)
|
|
return;
|
|
|
|
base = alloc_down(size, PAGE_SIZE, 0);
|
|
if (base == 0)
|
|
prom_panic("Could not allocate memory for RTAS\n");
|
|
|
|
rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
|
|
if (!IHANDLE_VALID(rtas_inst)) {
|
|
prom_printf("opening rtas package failed (%x)\n", rtas_inst);
|
|
return;
|
|
}
|
|
|
|
prom_printf("instantiating rtas at 0x%x...", base);
|
|
|
|
if (call_prom_ret("call-method", 3, 2, &entry,
|
|
ADDR("instantiate-rtas"),
|
|
rtas_inst, base) != 0
|
|
|| entry == 0) {
|
|
prom_printf(" failed\n");
|
|
return;
|
|
}
|
|
prom_printf(" done\n");
|
|
|
|
reserve_mem(base, size);
|
|
|
|
val = cpu_to_be32(base);
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
|
|
&val, sizeof(val));
|
|
val = cpu_to_be32(entry);
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
|
|
&val, sizeof(val));
|
|
|
|
/* Check if it supports "query-cpu-stopped-state" */
|
|
if (prom_getprop(rtas_node, "query-cpu-stopped-state",
|
|
&val, sizeof(val)) != PROM_ERROR)
|
|
rtas_has_query_cpu_stopped = true;
|
|
|
|
prom_debug("rtas base = 0x%x\n", base);
|
|
prom_debug("rtas entry = 0x%x\n", entry);
|
|
prom_debug("rtas size = 0x%x\n", size);
|
|
|
|
prom_debug("prom_instantiate_rtas: end...\n");
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* Allocate room for and instantiate Stored Measurement Log (SML)
|
|
*/
|
|
static void __init prom_instantiate_sml(void)
|
|
{
|
|
phandle ibmvtpm_node;
|
|
ihandle ibmvtpm_inst;
|
|
u32 entry = 0, size = 0, succ = 0;
|
|
u64 base;
|
|
__be32 val;
|
|
|
|
prom_debug("prom_instantiate_sml: start...\n");
|
|
|
|
ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
|
|
prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
|
|
if (!PHANDLE_VALID(ibmvtpm_node))
|
|
return;
|
|
|
|
ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
|
|
if (!IHANDLE_VALID(ibmvtpm_inst)) {
|
|
prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
|
|
return;
|
|
}
|
|
|
|
if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
|
|
&val, sizeof(val)) != PROM_ERROR) {
|
|
if (call_prom_ret("call-method", 2, 2, &succ,
|
|
ADDR("reformat-sml-to-efi-alignment"),
|
|
ibmvtpm_inst) != 0 || succ == 0) {
|
|
prom_printf("Reformat SML to EFI alignment failed\n");
|
|
return;
|
|
}
|
|
|
|
if (call_prom_ret("call-method", 2, 2, &size,
|
|
ADDR("sml-get-allocated-size"),
|
|
ibmvtpm_inst) != 0 || size == 0) {
|
|
prom_printf("SML get allocated size failed\n");
|
|
return;
|
|
}
|
|
} else {
|
|
if (call_prom_ret("call-method", 2, 2, &size,
|
|
ADDR("sml-get-handover-size"),
|
|
ibmvtpm_inst) != 0 || size == 0) {
|
|
prom_printf("SML get handover size failed\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
base = alloc_down(size, PAGE_SIZE, 0);
|
|
if (base == 0)
|
|
prom_panic("Could not allocate memory for sml\n");
|
|
|
|
prom_printf("instantiating sml at 0x%llx...", base);
|
|
|
|
memset((void *)base, 0, size);
|
|
|
|
if (call_prom_ret("call-method", 4, 2, &entry,
|
|
ADDR("sml-handover"),
|
|
ibmvtpm_inst, size, base) != 0 || entry == 0) {
|
|
prom_printf("SML handover failed\n");
|
|
return;
|
|
}
|
|
prom_printf(" done\n");
|
|
|
|
reserve_mem(base, size);
|
|
|
|
prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
|
|
&base, sizeof(base));
|
|
prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
|
|
&size, sizeof(size));
|
|
|
|
prom_debug("sml base = 0x%llx\n", base);
|
|
prom_debug("sml size = 0x%x\n", size);
|
|
|
|
prom_debug("prom_instantiate_sml: end...\n");
|
|
}
|
|
|
|
/*
|
|
* Allocate room for and initialize TCE tables
|
|
*/
|
|
#ifdef __BIG_ENDIAN__
|
|
static void __init prom_initialize_tce_table(void)
|
|
{
|
|
phandle node;
|
|
ihandle phb_node;
|
|
char compatible[64], type[64], model[64];
|
|
char *path = prom_scratch;
|
|
u64 base, align;
|
|
u32 minalign, minsize;
|
|
u64 tce_entry, *tce_entryp;
|
|
u64 local_alloc_top, local_alloc_bottom;
|
|
u64 i;
|
|
|
|
if (prom_iommu_off)
|
|
return;
|
|
|
|
prom_debug("starting prom_initialize_tce_table\n");
|
|
|
|
/* Cache current top of allocs so we reserve a single block */
|
|
local_alloc_top = alloc_top_high;
|
|
local_alloc_bottom = local_alloc_top;
|
|
|
|
/* Search all nodes looking for PHBs. */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
compatible[0] = 0;
|
|
type[0] = 0;
|
|
model[0] = 0;
|
|
prom_getprop(node, "compatible",
|
|
compatible, sizeof(compatible));
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
prom_getprop(node, "model", model, sizeof(model));
|
|
|
|
if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
|
|
continue;
|
|
|
|
/* Keep the old logic intact to avoid regression. */
|
|
if (compatible[0] != 0) {
|
|
if ((prom_strstr(compatible, "python") == NULL) &&
|
|
(prom_strstr(compatible, "Speedwagon") == NULL) &&
|
|
(prom_strstr(compatible, "Winnipeg") == NULL))
|
|
continue;
|
|
} else if (model[0] != 0) {
|
|
if ((prom_strstr(model, "ython") == NULL) &&
|
|
(prom_strstr(model, "peedwagon") == NULL) &&
|
|
(prom_strstr(model, "innipeg") == NULL))
|
|
continue;
|
|
}
|
|
|
|
if (prom_getprop(node, "tce-table-minalign", &minalign,
|
|
sizeof(minalign)) == PROM_ERROR)
|
|
minalign = 0;
|
|
if (prom_getprop(node, "tce-table-minsize", &minsize,
|
|
sizeof(minsize)) == PROM_ERROR)
|
|
minsize = 4UL << 20;
|
|
|
|
/*
|
|
* Even though we read what OF wants, we just set the table
|
|
* size to 4 MB. This is enough to map 2GB of PCI DMA space.
|
|
* By doing this, we avoid the pitfalls of trying to DMA to
|
|
* MMIO space and the DMA alias hole.
|
|
*/
|
|
minsize = 4UL << 20;
|
|
|
|
/* Align to the greater of the align or size */
|
|
align = max(minalign, minsize);
|
|
base = alloc_down(minsize, align, 1);
|
|
if (base == 0)
|
|
prom_panic("ERROR, cannot find space for TCE table.\n");
|
|
if (base < local_alloc_bottom)
|
|
local_alloc_bottom = base;
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
memset(path, 0, sizeof(prom_scratch));
|
|
/* Call OF to setup the TCE hardware */
|
|
if (call_prom("package-to-path", 3, 1, node,
|
|
path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
|
|
prom_printf("package-to-path failed\n");
|
|
}
|
|
|
|
/* Save away the TCE table attributes for later use. */
|
|
prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
|
|
prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
|
|
|
|
prom_debug("TCE table: %s\n", path);
|
|
prom_debug("\tnode = 0x%x\n", node);
|
|
prom_debug("\tbase = 0x%llx\n", base);
|
|
prom_debug("\tsize = 0x%x\n", minsize);
|
|
|
|
/* Initialize the table to have a one-to-one mapping
|
|
* over the allocated size.
|
|
*/
|
|
tce_entryp = (u64 *)base;
|
|
for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
|
|
tce_entry = (i << PAGE_SHIFT);
|
|
tce_entry |= 0x3;
|
|
*tce_entryp = tce_entry;
|
|
}
|
|
|
|
prom_printf("opening PHB %s", path);
|
|
phb_node = call_prom("open", 1, 1, path);
|
|
if (phb_node == 0)
|
|
prom_printf("... failed\n");
|
|
else
|
|
prom_printf("... done\n");
|
|
|
|
call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
|
|
phb_node, -1, minsize,
|
|
(u32) base, (u32) (base >> 32));
|
|
call_prom("close", 1, 0, phb_node);
|
|
}
|
|
|
|
reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
|
|
|
|
/* These are only really needed if there is a memory limit in
|
|
* effect, but we don't know so export them always. */
|
|
prom_tce_alloc_start = local_alloc_bottom;
|
|
prom_tce_alloc_end = local_alloc_top;
|
|
|
|
/* Flag the first invalid entry */
|
|
prom_debug("ending prom_initialize_tce_table\n");
|
|
}
|
|
#endif /* __BIG_ENDIAN__ */
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
/*
|
|
* With CHRP SMP we need to use the OF to start the other processors.
|
|
* We can't wait until smp_boot_cpus (the OF is trashed by then)
|
|
* so we have to put the processors into a holding pattern controlled
|
|
* by the kernel (not OF) before we destroy the OF.
|
|
*
|
|
* This uses a chunk of low memory, puts some holding pattern
|
|
* code there and sends the other processors off to there until
|
|
* smp_boot_cpus tells them to do something. The holding pattern
|
|
* checks that address until its cpu # is there, when it is that
|
|
* cpu jumps to __secondary_start(). smp_boot_cpus() takes care
|
|
* of setting those values.
|
|
*
|
|
* We also use physical address 0x4 here to tell when a cpu
|
|
* is in its holding pattern code.
|
|
*
|
|
* -- Cort
|
|
*/
|
|
/*
|
|
* We want to reference the copy of __secondary_hold_* in the
|
|
* 0 - 0x100 address range
|
|
*/
|
|
#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
|
|
|
|
static void __init prom_hold_cpus(void)
|
|
{
|
|
unsigned long i;
|
|
phandle node;
|
|
char type[64];
|
|
unsigned long *spinloop
|
|
= (void *) LOW_ADDR(__secondary_hold_spinloop);
|
|
unsigned long *acknowledge
|
|
= (void *) LOW_ADDR(__secondary_hold_acknowledge);
|
|
unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
|
|
|
|
/*
|
|
* On pseries, if RTAS supports "query-cpu-stopped-state",
|
|
* we skip this stage, the CPUs will be started by the
|
|
* kernel using RTAS.
|
|
*/
|
|
if ((of_platform == PLATFORM_PSERIES ||
|
|
of_platform == PLATFORM_PSERIES_LPAR) &&
|
|
rtas_has_query_cpu_stopped) {
|
|
prom_printf("prom_hold_cpus: skipped\n");
|
|
return;
|
|
}
|
|
|
|
prom_debug("prom_hold_cpus: start...\n");
|
|
prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
|
|
prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
|
|
prom_debug(" 1) acknowledge = 0x%lx\n",
|
|
(unsigned long)acknowledge);
|
|
prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
|
|
prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
|
|
|
|
/* Set the common spinloop variable, so all of the secondary cpus
|
|
* will block when they are awakened from their OF spinloop.
|
|
* This must occur for both SMP and non SMP kernels, since OF will
|
|
* be trashed when we move the kernel.
|
|
*/
|
|
*spinloop = 0;
|
|
|
|
/* look for cpus */
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
unsigned int cpu_no;
|
|
__be32 reg;
|
|
|
|
type[0] = 0;
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
if (prom_strcmp(type, "cpu") != 0)
|
|
continue;
|
|
|
|
/* Skip non-configured cpus. */
|
|
if (prom_getprop(node, "status", type, sizeof(type)) > 0)
|
|
if (prom_strcmp(type, "okay") != 0)
|
|
continue;
|
|
|
|
reg = cpu_to_be32(-1); /* make sparse happy */
|
|
prom_getprop(node, "reg", ®, sizeof(reg));
|
|
cpu_no = be32_to_cpu(reg);
|
|
|
|
prom_debug("cpu hw idx = %u\n", cpu_no);
|
|
|
|
/* Init the acknowledge var which will be reset by
|
|
* the secondary cpu when it awakens from its OF
|
|
* spinloop.
|
|
*/
|
|
*acknowledge = (unsigned long)-1;
|
|
|
|
if (cpu_no != prom.cpu) {
|
|
/* Primary Thread of non-boot cpu or any thread */
|
|
prom_printf("starting cpu hw idx %u... ", cpu_no);
|
|
call_prom("start-cpu", 3, 0, node,
|
|
secondary_hold, cpu_no);
|
|
|
|
for (i = 0; (i < 100000000) &&
|
|
(*acknowledge == ((unsigned long)-1)); i++ )
|
|
mb();
|
|
|
|
if (*acknowledge == cpu_no)
|
|
prom_printf("done\n");
|
|
else
|
|
prom_printf("failed: %lx\n", *acknowledge);
|
|
}
|
|
#ifdef CONFIG_SMP
|
|
else
|
|
prom_printf("boot cpu hw idx %u\n", cpu_no);
|
|
#endif /* CONFIG_SMP */
|
|
}
|
|
|
|
prom_debug("prom_hold_cpus: end...\n");
|
|
}
|
|
|
|
|
|
static void __init prom_init_client_services(unsigned long pp)
|
|
{
|
|
/* Get a handle to the prom entry point before anything else */
|
|
prom_entry = pp;
|
|
|
|
/* get a handle for the stdout device */
|
|
prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
|
|
if (!PHANDLE_VALID(prom.chosen))
|
|
prom_panic("cannot find chosen"); /* msg won't be printed :( */
|
|
|
|
/* get device tree root */
|
|
prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
if (!PHANDLE_VALID(prom.root))
|
|
prom_panic("cannot find device tree root"); /* msg won't be printed :( */
|
|
|
|
prom.mmumap = 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PPC32
|
|
/*
|
|
* For really old powermacs, we need to map things we claim.
|
|
* For that, we need the ihandle of the mmu.
|
|
* Also, on the longtrail, we need to work around other bugs.
|
|
*/
|
|
static void __init prom_find_mmu(void)
|
|
{
|
|
phandle oprom;
|
|
char version[64];
|
|
|
|
oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
|
|
if (!PHANDLE_VALID(oprom))
|
|
return;
|
|
if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
|
|
return;
|
|
version[sizeof(version) - 1] = 0;
|
|
/* XXX might need to add other versions here */
|
|
if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
|
|
of_workarounds = OF_WA_CLAIM;
|
|
else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
|
|
of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
|
|
call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
|
|
} else
|
|
return;
|
|
prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
|
|
prom_getprop(prom.chosen, "mmu", &prom.mmumap,
|
|
sizeof(prom.mmumap));
|
|
prom.mmumap = be32_to_cpu(prom.mmumap);
|
|
if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
|
|
of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
|
|
}
|
|
#else
|
|
#define prom_find_mmu()
|
|
#endif
|
|
|
|
static void __init prom_init_stdout(void)
|
|
{
|
|
char *path = of_stdout_device;
|
|
char type[16];
|
|
phandle stdout_node;
|
|
__be32 val;
|
|
|
|
if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
|
|
prom_panic("cannot find stdout");
|
|
|
|
prom.stdout = be32_to_cpu(val);
|
|
|
|
/* Get the full OF pathname of the stdout device */
|
|
memset(path, 0, 256);
|
|
call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
|
|
prom_printf("OF stdout device is: %s\n", of_stdout_device);
|
|
prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
|
|
path, prom_strlen(path) + 1);
|
|
|
|
/* instance-to-package fails on PA-Semi */
|
|
stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
|
|
if (stdout_node != PROM_ERROR) {
|
|
val = cpu_to_be32(stdout_node);
|
|
|
|
/* If it's a display, note it */
|
|
memset(type, 0, sizeof(type));
|
|
prom_getprop(stdout_node, "device_type", type, sizeof(type));
|
|
if (prom_strcmp(type, "display") == 0)
|
|
prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
|
|
}
|
|
}
|
|
|
|
static int __init prom_find_machine_type(void)
|
|
{
|
|
char compat[256];
|
|
int len, i = 0;
|
|
#ifdef CONFIG_PPC64
|
|
phandle rtas;
|
|
int x;
|
|
#endif
|
|
|
|
/* Look for a PowerMac or a Cell */
|
|
len = prom_getprop(prom.root, "compatible",
|
|
compat, sizeof(compat)-1);
|
|
if (len > 0) {
|
|
compat[len] = 0;
|
|
while (i < len) {
|
|
char *p = &compat[i];
|
|
int sl = prom_strlen(p);
|
|
if (sl == 0)
|
|
break;
|
|
if (prom_strstr(p, "Power Macintosh") ||
|
|
prom_strstr(p, "MacRISC"))
|
|
return PLATFORM_POWERMAC;
|
|
#ifdef CONFIG_PPC64
|
|
/* We must make sure we don't detect the IBM Cell
|
|
* blades as pSeries due to some firmware issues,
|
|
* so we do it here.
|
|
*/
|
|
if (prom_strstr(p, "IBM,CBEA") ||
|
|
prom_strstr(p, "IBM,CPBW-1.0"))
|
|
return PLATFORM_GENERIC;
|
|
#endif /* CONFIG_PPC64 */
|
|
i += sl + 1;
|
|
}
|
|
}
|
|
#ifdef CONFIG_PPC64
|
|
/* Try to figure out if it's an IBM pSeries or any other
|
|
* PAPR compliant platform. We assume it is if :
|
|
* - /device_type is "chrp" (please, do NOT use that for future
|
|
* non-IBM designs !
|
|
* - it has /rtas
|
|
*/
|
|
len = prom_getprop(prom.root, "device_type",
|
|
compat, sizeof(compat)-1);
|
|
if (len <= 0)
|
|
return PLATFORM_GENERIC;
|
|
if (prom_strcmp(compat, "chrp"))
|
|
return PLATFORM_GENERIC;
|
|
|
|
/* Default to pSeries. We need to know if we are running LPAR */
|
|
rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
|
if (!PHANDLE_VALID(rtas))
|
|
return PLATFORM_GENERIC;
|
|
x = prom_getproplen(rtas, "ibm,hypertas-functions");
|
|
if (x != PROM_ERROR) {
|
|
prom_debug("Hypertas detected, assuming LPAR !\n");
|
|
return PLATFORM_PSERIES_LPAR;
|
|
}
|
|
return PLATFORM_PSERIES;
|
|
#else
|
|
return PLATFORM_GENERIC;
|
|
#endif
|
|
}
|
|
|
|
static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
|
|
{
|
|
return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
|
|
}
|
|
|
|
/*
|
|
* If we have a display that we don't know how to drive,
|
|
* we will want to try to execute OF's open method for it
|
|
* later. However, OF will probably fall over if we do that
|
|
* we've taken over the MMU.
|
|
* So we check whether we will need to open the display,
|
|
* and if so, open it now.
|
|
*/
|
|
static void __init prom_check_displays(void)
|
|
{
|
|
char type[16], *path;
|
|
phandle node;
|
|
ihandle ih;
|
|
int i;
|
|
|
|
static const unsigned char default_colors[] __initconst = {
|
|
0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0xaa,
|
|
0x00, 0xaa, 0x00,
|
|
0x00, 0xaa, 0xaa,
|
|
0xaa, 0x00, 0x00,
|
|
0xaa, 0x00, 0xaa,
|
|
0xaa, 0xaa, 0x00,
|
|
0xaa, 0xaa, 0xaa,
|
|
0x55, 0x55, 0x55,
|
|
0x55, 0x55, 0xff,
|
|
0x55, 0xff, 0x55,
|
|
0x55, 0xff, 0xff,
|
|
0xff, 0x55, 0x55,
|
|
0xff, 0x55, 0xff,
|
|
0xff, 0xff, 0x55,
|
|
0xff, 0xff, 0xff
|
|
};
|
|
const unsigned char *clut;
|
|
|
|
prom_debug("Looking for displays\n");
|
|
for (node = 0; prom_next_node(&node); ) {
|
|
memset(type, 0, sizeof(type));
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
|
if (prom_strcmp(type, "display") != 0)
|
|
continue;
|
|
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
|
path = prom_scratch;
|
|
memset(path, 0, sizeof(prom_scratch));
|
|
|
|
/*
|
|
* leave some room at the end of the path for appending extra
|
|
* arguments
|
|
*/
|
|
if (call_prom("package-to-path", 3, 1, node, path,
|
|
sizeof(prom_scratch) - 10) == PROM_ERROR)
|
|
continue;
|
|
prom_printf("found display : %s, opening... ", path);
|
|
|
|
ih = call_prom("open", 1, 1, path);
|
|
if (ih == 0) {
|
|
prom_printf("failed\n");
|
|
continue;
|
|
}
|
|
|
|
/* Success */
|
|
prom_printf("done\n");
|
|
prom_setprop(node, path, "linux,opened", NULL, 0);
|
|
|
|
/* Setup a usable color table when the appropriate
|
|
* method is available. Should update this to set-colors */
|
|
clut = default_colors;
|
|
for (i = 0; i < 16; i++, clut += 3)
|
|
if (prom_set_color(ih, i, clut[0], clut[1],
|
|
clut[2]) != 0)
|
|
break;
|
|
|
|
#ifdef CONFIG_LOGO_LINUX_CLUT224
|
|
clut = PTRRELOC(logo_linux_clut224.clut);
|
|
for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
|
|
if (prom_set_color(ih, i + 32, clut[0], clut[1],
|
|
clut[2]) != 0)
|
|
break;
|
|
#endif /* CONFIG_LOGO_LINUX_CLUT224 */
|
|
|
|
#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
|
|
if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
|
|
PROM_ERROR) {
|
|
u32 width, height, pitch, addr;
|
|
|
|
prom_printf("Setting btext !\n");
|
|
prom_getprop(node, "width", &width, 4);
|
|
prom_getprop(node, "height", &height, 4);
|
|
prom_getprop(node, "linebytes", &pitch, 4);
|
|
prom_getprop(node, "address", &addr, 4);
|
|
prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
|
|
width, height, pitch, addr);
|
|
btext_setup_display(width, height, 8, pitch, addr);
|
|
btext_prepare_BAT();
|
|
}
|
|
#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
|
|
}
|
|
}
|
|
|
|
|
|
/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
|
|
static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
|
|
unsigned long needed, unsigned long align)
|
|
{
|
|
void *ret;
|
|
|
|
*mem_start = _ALIGN(*mem_start, align);
|
|
while ((*mem_start + needed) > *mem_end) {
|
|
unsigned long room, chunk;
|
|
|
|
prom_debug("Chunk exhausted, claiming more at %lx...\n",
|
|
alloc_bottom);
|
|
room = alloc_top - alloc_bottom;
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
|
room = DEVTREE_CHUNK_SIZE;
|
|
if (room < PAGE_SIZE)
|
|
prom_panic("No memory for flatten_device_tree "
|
|
"(no room)\n");
|
|
chunk = alloc_up(room, 0);
|
|
if (chunk == 0)
|
|
prom_panic("No memory for flatten_device_tree "
|
|
"(claim failed)\n");
|
|
*mem_end = chunk + room;
|
|
}
|
|
|
|
ret = (void *)*mem_start;
|
|
*mem_start += needed;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define dt_push_token(token, mem_start, mem_end) do { \
|
|
void *room = make_room(mem_start, mem_end, 4, 4); \
|
|
*(__be32 *)room = cpu_to_be32(token); \
|
|
} while(0)
|
|
|
|
static unsigned long __init dt_find_string(char *str)
|
|
{
|
|
char *s, *os;
|
|
|
|
s = os = (char *)dt_string_start;
|
|
s += 4;
|
|
while (s < (char *)dt_string_end) {
|
|
if (prom_strcmp(s, str) == 0)
|
|
return s - os;
|
|
s += prom_strlen(s) + 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The Open Firmware 1275 specification states properties must be 31 bytes or
|
|
* less, however not all firmwares obey this. Make it 64 bytes to be safe.
|
|
*/
|
|
#define MAX_PROPERTY_NAME 64
|
|
|
|
static void __init scan_dt_build_strings(phandle node,
|
|
unsigned long *mem_start,
|
|
unsigned long *mem_end)
|
|
{
|
|
char *prev_name, *namep, *sstart;
|
|
unsigned long soff;
|
|
phandle child;
|
|
|
|
sstart = (char *)dt_string_start;
|
|
|
|
/* get and store all property names */
|
|
prev_name = "";
|
|
for (;;) {
|
|
/* 64 is max len of name including nul. */
|
|
namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
|
|
if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
|
|
/* No more nodes: unwind alloc */
|
|
*mem_start = (unsigned long)namep;
|
|
break;
|
|
}
|
|
|
|
/* skip "name" */
|
|
if (prom_strcmp(namep, "name") == 0) {
|
|
*mem_start = (unsigned long)namep;
|
|
prev_name = "name";
|
|
continue;
|
|
}
|
|
/* get/create string entry */
|
|
soff = dt_find_string(namep);
|
|
if (soff != 0) {
|
|
*mem_start = (unsigned long)namep;
|
|
namep = sstart + soff;
|
|
} else {
|
|
/* Trim off some if we can */
|
|
*mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
|
|
dt_string_end = *mem_start;
|
|
}
|
|
prev_name = namep;
|
|
}
|
|
|
|
/* do all our children */
|
|
child = call_prom("child", 1, 1, node);
|
|
while (child != 0) {
|
|
scan_dt_build_strings(child, mem_start, mem_end);
|
|
child = call_prom("peer", 1, 1, child);
|
|
}
|
|
}
|
|
|
|
static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
|
unsigned long *mem_end)
|
|
{
|
|
phandle child;
|
|
char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
|
|
unsigned long soff;
|
|
unsigned char *valp;
|
|
static char pname[MAX_PROPERTY_NAME] __prombss;
|
|
int l, room, has_phandle = 0;
|
|
|
|
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
|
|
|
|
/* get the node's full name */
|
|
namep = (char *)*mem_start;
|
|
room = *mem_end - *mem_start;
|
|
if (room > 255)
|
|
room = 255;
|
|
l = call_prom("package-to-path", 3, 1, node, namep, room);
|
|
if (l >= 0) {
|
|
/* Didn't fit? Get more room. */
|
|
if (l >= room) {
|
|
if (l >= *mem_end - *mem_start)
|
|
namep = make_room(mem_start, mem_end, l+1, 1);
|
|
call_prom("package-to-path", 3, 1, node, namep, l);
|
|
}
|
|
namep[l] = '\0';
|
|
|
|
/* Fixup an Apple bug where they have bogus \0 chars in the
|
|
* middle of the path in some properties, and extract
|
|
* the unit name (everything after the last '/').
|
|
*/
|
|
for (lp = p = namep, ep = namep + l; p < ep; p++) {
|
|
if (*p == '/')
|
|
lp = namep;
|
|
else if (*p != 0)
|
|
*lp++ = *p;
|
|
}
|
|
*lp = 0;
|
|
*mem_start = _ALIGN((unsigned long)lp + 1, 4);
|
|
}
|
|
|
|
/* get it again for debugging */
|
|
path = prom_scratch;
|
|
memset(path, 0, sizeof(prom_scratch));
|
|
call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
|
|
|
|
/* get and store all properties */
|
|
prev_name = "";
|
|
sstart = (char *)dt_string_start;
|
|
for (;;) {
|
|
if (call_prom("nextprop", 3, 1, node, prev_name,
|
|
pname) != 1)
|
|
break;
|
|
|
|
/* skip "name" */
|
|
if (prom_strcmp(pname, "name") == 0) {
|
|
prev_name = "name";
|
|
continue;
|
|
}
|
|
|
|
/* find string offset */
|
|
soff = dt_find_string(pname);
|
|
if (soff == 0) {
|
|
prom_printf("WARNING: Can't find string index for"
|
|
" <%s>, node %s\n", pname, path);
|
|
break;
|
|
}
|
|
prev_name = sstart + soff;
|
|
|
|
/* get length */
|
|
l = call_prom("getproplen", 2, 1, node, pname);
|
|
|
|
/* sanity checks */
|
|
if (l == PROM_ERROR)
|
|
continue;
|
|
|
|
/* push property head */
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
|
dt_push_token(l, mem_start, mem_end);
|
|
dt_push_token(soff, mem_start, mem_end);
|
|
|
|
/* push property content */
|
|
valp = make_room(mem_start, mem_end, l, 4);
|
|
call_prom("getprop", 4, 1, node, pname, valp, l);
|
|
*mem_start = _ALIGN(*mem_start, 4);
|
|
|
|
if (!prom_strcmp(pname, "phandle"))
|
|
has_phandle = 1;
|
|
}
|
|
|
|
/* Add a "phandle" property if none already exist */
|
|
if (!has_phandle) {
|
|
soff = dt_find_string("phandle");
|
|
if (soff == 0)
|
|
prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
|
|
else {
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
|
dt_push_token(4, mem_start, mem_end);
|
|
dt_push_token(soff, mem_start, mem_end);
|
|
valp = make_room(mem_start, mem_end, 4, 4);
|
|
*(__be32 *)valp = cpu_to_be32(node);
|
|
}
|
|
}
|
|
|
|
/* do all our children */
|
|
child = call_prom("child", 1, 1, node);
|
|
while (child != 0) {
|
|
scan_dt_build_struct(child, mem_start, mem_end);
|
|
child = call_prom("peer", 1, 1, child);
|
|
}
|
|
|
|
dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
|
|
}
|
|
|
|
static void __init flatten_device_tree(void)
|
|
{
|
|
phandle root;
|
|
unsigned long mem_start, mem_end, room;
|
|
struct boot_param_header *hdr;
|
|
char *namep;
|
|
u64 *rsvmap;
|
|
|
|
/*
|
|
* Check how much room we have between alloc top & bottom (+/- a
|
|
* few pages), crop to 1MB, as this is our "chunk" size
|
|
*/
|
|
room = alloc_top - alloc_bottom - 0x4000;
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
|
room = DEVTREE_CHUNK_SIZE;
|
|
prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
|
|
|
|
/* Now try to claim that */
|
|
mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
|
|
if (mem_start == 0)
|
|
prom_panic("Can't allocate initial device-tree chunk\n");
|
|
mem_end = mem_start + room;
|
|
|
|
/* Get root of tree */
|
|
root = call_prom("peer", 1, 1, (phandle)0);
|
|
if (root == (phandle)0)
|
|
prom_panic ("couldn't get device tree root\n");
|
|
|
|
/* Build header and make room for mem rsv map */
|
|
mem_start = _ALIGN(mem_start, 4);
|
|
hdr = make_room(&mem_start, &mem_end,
|
|
sizeof(struct boot_param_header), 4);
|
|
dt_header_start = (unsigned long)hdr;
|
|
rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
|
|
|
|
/* Start of strings */
|
|
mem_start = PAGE_ALIGN(mem_start);
|
|
dt_string_start = mem_start;
|
|
mem_start += 4; /* hole */
|
|
|
|
/* Add "phandle" in there, we'll need it */
|
|
namep = make_room(&mem_start, &mem_end, 16, 1);
|
|
prom_strcpy(namep, "phandle");
|
|
mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
|
|
|
|
/* Build string array */
|
|
prom_printf("Building dt strings...\n");
|
|
scan_dt_build_strings(root, &mem_start, &mem_end);
|
|
dt_string_end = mem_start;
|
|
|
|
/* Build structure */
|
|
mem_start = PAGE_ALIGN(mem_start);
|
|
dt_struct_start = mem_start;
|
|
prom_printf("Building dt structure...\n");
|
|
scan_dt_build_struct(root, &mem_start, &mem_end);
|
|
dt_push_token(OF_DT_END, &mem_start, &mem_end);
|
|
dt_struct_end = PAGE_ALIGN(mem_start);
|
|
|
|
/* Finish header */
|
|
hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
|
|
hdr->magic = cpu_to_be32(OF_DT_HEADER);
|
|
hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
|
|
hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
|
|
hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
|
|
hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
|
|
hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
|
|
hdr->version = cpu_to_be32(OF_DT_VERSION);
|
|
/* Version 16 is not backward compatible */
|
|
hdr->last_comp_version = cpu_to_be32(0x10);
|
|
|
|
/* Copy the reserve map in */
|
|
memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
|
|
|
|
#ifdef DEBUG_PROM
|
|
{
|
|
int i;
|
|
prom_printf("reserved memory map:\n");
|
|
for (i = 0; i < mem_reserve_cnt; i++)
|
|
prom_printf(" %llx - %llx\n",
|
|
be64_to_cpu(mem_reserve_map[i].base),
|
|
be64_to_cpu(mem_reserve_map[i].size));
|
|
}
|
|
#endif
|
|
/* Bump mem_reserve_cnt to cause further reservations to fail
|
|
* since it's too late.
|
|
*/
|
|
mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
|
|
|
|
prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
|
|
dt_string_start, dt_string_end);
|
|
prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
|
|
dt_struct_start, dt_struct_end);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_MAPLE
|
|
/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
|
|
* The values are bad, and it doesn't even have the right number of cells. */
|
|
static void __init fixup_device_tree_maple(void)
|
|
{
|
|
phandle isa;
|
|
u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
|
|
u32 isa_ranges[6];
|
|
char *name;
|
|
|
|
name = "/ht@0/isa@4";
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(isa)) {
|
|
name = "/ht@0/isa@6";
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
|
}
|
|
if (!PHANDLE_VALID(isa))
|
|
return;
|
|
|
|
if (prom_getproplen(isa, "ranges") != 12)
|
|
return;
|
|
if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
|
|
== PROM_ERROR)
|
|
return;
|
|
|
|
if (isa_ranges[0] != 0x1 ||
|
|
isa_ranges[1] != 0xf4000000 ||
|
|
isa_ranges[2] != 0x00010000)
|
|
return;
|
|
|
|
prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
|
|
|
|
isa_ranges[0] = 0x1;
|
|
isa_ranges[1] = 0x0;
|
|
isa_ranges[2] = rloc;
|
|
isa_ranges[3] = 0x0;
|
|
isa_ranges[4] = 0x0;
|
|
isa_ranges[5] = 0x00010000;
|
|
prom_setprop(isa, name, "ranges",
|
|
isa_ranges, sizeof(isa_ranges));
|
|
}
|
|
|
|
#define CPC925_MC_START 0xf8000000
|
|
#define CPC925_MC_LENGTH 0x1000000
|
|
/* The values for memory-controller don't have right number of cells */
|
|
static void __init fixup_device_tree_maple_memory_controller(void)
|
|
{
|
|
phandle mc;
|
|
u32 mc_reg[4];
|
|
char *name = "/hostbridge@f8000000";
|
|
u32 ac, sc;
|
|
|
|
mc = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(mc))
|
|
return;
|
|
|
|
if (prom_getproplen(mc, "reg") != 8)
|
|
return;
|
|
|
|
prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
|
|
prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
|
|
if ((ac != 2) || (sc != 2))
|
|
return;
|
|
|
|
if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
|
|
return;
|
|
|
|
if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
|
|
return;
|
|
|
|
prom_printf("Fixing up bogus hostbridge on Maple...\n");
|
|
|
|
mc_reg[0] = 0x0;
|
|
mc_reg[1] = CPC925_MC_START;
|
|
mc_reg[2] = 0x0;
|
|
mc_reg[3] = CPC925_MC_LENGTH;
|
|
prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
|
|
}
|
|
#else
|
|
#define fixup_device_tree_maple()
|
|
#define fixup_device_tree_maple_memory_controller()
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_CHRP
|
|
/*
|
|
* Pegasos and BriQ lacks the "ranges" property in the isa node
|
|
* Pegasos needs decimal IRQ 14/15, not hexadecimal
|
|
* Pegasos has the IDE configured in legacy mode, but advertised as native
|
|
*/
|
|
static void __init fixup_device_tree_chrp(void)
|
|
{
|
|
phandle ph;
|
|
u32 prop[6];
|
|
u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
|
|
char *name;
|
|
int rc;
|
|
|
|
name = "/pci@80000000/isa@c";
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(ph)) {
|
|
name = "/pci@ff500000/isa@6";
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
|
}
|
|
if (PHANDLE_VALID(ph)) {
|
|
rc = prom_getproplen(ph, "ranges");
|
|
if (rc == 0 || rc == PROM_ERROR) {
|
|
prom_printf("Fixing up missing ISA range on Pegasos...\n");
|
|
|
|
prop[0] = 0x1;
|
|
prop[1] = 0x0;
|
|
prop[2] = rloc;
|
|
prop[3] = 0x0;
|
|
prop[4] = 0x0;
|
|
prop[5] = 0x00010000;
|
|
prom_setprop(ph, name, "ranges", prop, sizeof(prop));
|
|
}
|
|
}
|
|
|
|
name = "/pci@80000000/ide@C,1";
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (PHANDLE_VALID(ph)) {
|
|
prom_printf("Fixing up IDE interrupt on Pegasos...\n");
|
|
prop[0] = 14;
|
|
prop[1] = 0x0;
|
|
prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
|
|
prom_printf("Fixing up IDE class-code on Pegasos...\n");
|
|
rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
|
|
if (rc == sizeof(u32)) {
|
|
prop[0] &= ~0x5;
|
|
prom_setprop(ph, name, "class-code", prop, sizeof(u32));
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
#define fixup_device_tree_chrp()
|
|
#endif
|
|
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
|
|
static void __init fixup_device_tree_pmac(void)
|
|
{
|
|
phandle u3, i2c, mpic;
|
|
u32 u3_rev;
|
|
u32 interrupts[2];
|
|
u32 parent;
|
|
|
|
/* Some G5s have a missing interrupt definition, fix it up here */
|
|
u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
|
|
if (!PHANDLE_VALID(u3))
|
|
return;
|
|
i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
|
|
if (!PHANDLE_VALID(i2c))
|
|
return;
|
|
mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
|
|
if (!PHANDLE_VALID(mpic))
|
|
return;
|
|
|
|
/* check if proper rev of u3 */
|
|
if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
|
|
== PROM_ERROR)
|
|
return;
|
|
if (u3_rev < 0x35 || u3_rev > 0x39)
|
|
return;
|
|
/* does it need fixup ? */
|
|
if (prom_getproplen(i2c, "interrupts") > 0)
|
|
return;
|
|
|
|
prom_printf("fixing up bogus interrupts for u3 i2c...\n");
|
|
|
|
/* interrupt on this revision of u3 is number 0 and level */
|
|
interrupts[0] = 0;
|
|
interrupts[1] = 1;
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
|
|
&interrupts, sizeof(interrupts));
|
|
parent = (u32)mpic;
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
|
|
&parent, sizeof(parent));
|
|
}
|
|
#else
|
|
#define fixup_device_tree_pmac()
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_EFIKA
|
|
/*
|
|
* The MPC5200 FEC driver requires an phy-handle property to tell it how
|
|
* to talk to the phy. If the phy-handle property is missing, then this
|
|
* function is called to add the appropriate nodes and link it to the
|
|
* ethernet node.
|
|
*/
|
|
static void __init fixup_device_tree_efika_add_phy(void)
|
|
{
|
|
u32 node;
|
|
char prop[64];
|
|
int rv;
|
|
|
|
/* Check if /builtin/ethernet exists - bail if it doesn't */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
|
|
if (!PHANDLE_VALID(node))
|
|
return;
|
|
|
|
/* Check if the phy-handle property exists - bail if it does */
|
|
rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
|
|
if (!rv)
|
|
return;
|
|
|
|
/*
|
|
* At this point the ethernet device doesn't have a phy described.
|
|
* Now we need to add the missing phy node and linkage
|
|
*/
|
|
|
|
/* Check for an MDIO bus node - if missing then create one */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
|
|
if (!PHANDLE_VALID(node)) {
|
|
prom_printf("Adding Ethernet MDIO node\n");
|
|
call_prom("interpret", 1, 1,
|
|
" s\" /builtin\" find-device"
|
|
" new-device"
|
|
" 1 encode-int s\" #address-cells\" property"
|
|
" 0 encode-int s\" #size-cells\" property"
|
|
" s\" mdio\" device-name"
|
|
" s\" fsl,mpc5200b-mdio\" encode-string"
|
|
" s\" compatible\" property"
|
|
" 0xf0003000 0x400 reg"
|
|
" 0x2 encode-int"
|
|
" 0x5 encode-int encode+"
|
|
" 0x3 encode-int encode+"
|
|
" s\" interrupts\" property"
|
|
" finish-device");
|
|
};
|
|
|
|
/* Check for a PHY device node - if missing then create one and
|
|
* give it's phandle to the ethernet node */
|
|
node = call_prom("finddevice", 1, 1,
|
|
ADDR("/builtin/mdio/ethernet-phy"));
|
|
if (!PHANDLE_VALID(node)) {
|
|
prom_printf("Adding Ethernet PHY node\n");
|
|
call_prom("interpret", 1, 1,
|
|
" s\" /builtin/mdio\" find-device"
|
|
" new-device"
|
|
" s\" ethernet-phy\" device-name"
|
|
" 0x10 encode-int s\" reg\" property"
|
|
" my-self"
|
|
" ihandle>phandle"
|
|
" finish-device"
|
|
" s\" /builtin/ethernet\" find-device"
|
|
" encode-int"
|
|
" s\" phy-handle\" property"
|
|
" device-end");
|
|
}
|
|
}
|
|
|
|
static void __init fixup_device_tree_efika(void)
|
|
{
|
|
int sound_irq[3] = { 2, 2, 0 };
|
|
int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
|
|
3,4,0, 3,5,0, 3,6,0, 3,7,0,
|
|
3,8,0, 3,9,0, 3,10,0, 3,11,0,
|
|
3,12,0, 3,13,0, 3,14,0, 3,15,0 };
|
|
u32 node;
|
|
char prop[64];
|
|
int rv, len;
|
|
|
|
/* Check if we're really running on a EFIKA */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
if (!PHANDLE_VALID(node))
|
|
return;
|
|
|
|
rv = prom_getprop(node, "model", prop, sizeof(prop));
|
|
if (rv == PROM_ERROR)
|
|
return;
|
|
if (prom_strcmp(prop, "EFIKA5K2"))
|
|
return;
|
|
|
|
prom_printf("Applying EFIKA device tree fixups\n");
|
|
|
|
/* Claiming to be 'chrp' is death */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/"));
|
|
rv = prom_getprop(node, "device_type", prop, sizeof(prop));
|
|
if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
|
|
prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
|
|
|
|
/* CODEGEN,description is exposed in /proc/cpuinfo so
|
|
fix that too */
|
|
rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
|
|
if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
|
|
prom_setprop(node, "/", "CODEGEN,description",
|
|
"Efika 5200B PowerPC System",
|
|
sizeof("Efika 5200B PowerPC System"));
|
|
|
|
/* Fixup bestcomm interrupts property */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
|
|
if (PHANDLE_VALID(node)) {
|
|
len = prom_getproplen(node, "interrupts");
|
|
if (len == 12) {
|
|
prom_printf("Fixing bestcomm interrupts property\n");
|
|
prom_setprop(node, "/builtin/bestcom", "interrupts",
|
|
bcomm_irq, sizeof(bcomm_irq));
|
|
}
|
|
}
|
|
|
|
/* Fixup sound interrupts property */
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
|
|
if (PHANDLE_VALID(node)) {
|
|
rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
|
|
if (rv == PROM_ERROR) {
|
|
prom_printf("Adding sound interrupts property\n");
|
|
prom_setprop(node, "/builtin/sound", "interrupts",
|
|
sound_irq, sizeof(sound_irq));
|
|
}
|
|
}
|
|
|
|
/* Make sure ethernet phy-handle property exists */
|
|
fixup_device_tree_efika_add_phy();
|
|
}
|
|
#else
|
|
#define fixup_device_tree_efika()
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_PASEMI_NEMO
|
|
/*
|
|
* CFE supplied on Nemo is broken in several ways, biggest
|
|
* problem is that it reassigns ISA interrupts to unused mpic ints.
|
|
* Add an interrupt-controller property for the io-bridge to use
|
|
* and correct the ints so we can attach them to an irq_domain
|
|
*/
|
|
static void __init fixup_device_tree_pasemi(void)
|
|
{
|
|
u32 interrupts[2], parent, rval, val = 0;
|
|
char *name, *pci_name;
|
|
phandle iob, node;
|
|
|
|
/* Find the root pci node */
|
|
name = "/pxp@0,e0000000";
|
|
iob = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(iob))
|
|
return;
|
|
|
|
/* check if interrupt-controller node set yet */
|
|
if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
|
|
return;
|
|
|
|
prom_printf("adding interrupt-controller property for SB600...\n");
|
|
|
|
prom_setprop(iob, name, "interrupt-controller", &val, 0);
|
|
|
|
pci_name = "/pxp@0,e0000000/pci@11";
|
|
node = call_prom("finddevice", 1, 1, ADDR(pci_name));
|
|
parent = ADDR(iob);
|
|
|
|
for( ; prom_next_node(&node); ) {
|
|
/* scan each node for one with an interrupt */
|
|
if (!PHANDLE_VALID(node))
|
|
continue;
|
|
|
|
rval = prom_getproplen(node, "interrupts");
|
|
if (rval == 0 || rval == PROM_ERROR)
|
|
continue;
|
|
|
|
prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
|
|
if ((interrupts[0] < 212) || (interrupts[0] > 222))
|
|
continue;
|
|
|
|
/* found a node, update both interrupts and interrupt-parent */
|
|
if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
|
|
interrupts[0] -= 203;
|
|
if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
|
|
interrupts[0] -= 213;
|
|
if (interrupts[0] == 221)
|
|
interrupts[0] = 14;
|
|
if (interrupts[0] == 222)
|
|
interrupts[0] = 8;
|
|
|
|
prom_setprop(node, pci_name, "interrupts", interrupts,
|
|
sizeof(interrupts));
|
|
prom_setprop(node, pci_name, "interrupt-parent", &parent,
|
|
sizeof(parent));
|
|
}
|
|
|
|
/*
|
|
* The io-bridge has device_type set to 'io-bridge' change it to 'isa'
|
|
* so that generic isa-bridge code can add the SB600 and its on-board
|
|
* peripherals.
|
|
*/
|
|
name = "/pxp@0,e0000000/io-bridge@0";
|
|
iob = call_prom("finddevice", 1, 1, ADDR(name));
|
|
if (!PHANDLE_VALID(iob))
|
|
return;
|
|
|
|
/* device_type is already set, just change it. */
|
|
|
|
prom_printf("Changing device_type of SB600 node...\n");
|
|
|
|
prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
|
|
}
|
|
#else /* !CONFIG_PPC_PASEMI_NEMO */
|
|
static inline void fixup_device_tree_pasemi(void) { }
|
|
#endif
|
|
|
|
static void __init fixup_device_tree(void)
|
|
{
|
|
fixup_device_tree_maple();
|
|
fixup_device_tree_maple_memory_controller();
|
|
fixup_device_tree_chrp();
|
|
fixup_device_tree_pmac();
|
|
fixup_device_tree_efika();
|
|
fixup_device_tree_pasemi();
|
|
}
|
|
|
|
static void __init prom_find_boot_cpu(void)
|
|
{
|
|
__be32 rval;
|
|
ihandle prom_cpu;
|
|
phandle cpu_pkg;
|
|
|
|
rval = 0;
|
|
if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
|
|
return;
|
|
prom_cpu = be32_to_cpu(rval);
|
|
|
|
cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
|
|
|
|
if (!PHANDLE_VALID(cpu_pkg))
|
|
return;
|
|
|
|
prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
|
|
prom.cpu = be32_to_cpu(rval);
|
|
|
|
prom_debug("Booting CPU hw index = %d\n", prom.cpu);
|
|
}
|
|
|
|
static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (r3 && r4 && r4 != 0xdeadbeef) {
|
|
__be64 val;
|
|
|
|
prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
|
|
prom_initrd_end = prom_initrd_start + r4;
|
|
|
|
val = cpu_to_be64(prom_initrd_start);
|
|
prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
|
|
&val, sizeof(val));
|
|
val = cpu_to_be64(prom_initrd_end);
|
|
prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
|
|
&val, sizeof(val));
|
|
|
|
reserve_mem(prom_initrd_start,
|
|
prom_initrd_end - prom_initrd_start);
|
|
|
|
prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
|
|
prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_INITRD */
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#ifdef CONFIG_RELOCATABLE
|
|
static void reloc_toc(void)
|
|
{
|
|
}
|
|
|
|
static void unreloc_toc(void)
|
|
{
|
|
}
|
|
#else
|
|
static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
|
|
{
|
|
unsigned long i;
|
|
unsigned long *toc_entry;
|
|
|
|
/* Get the start of the TOC by using r2 directly. */
|
|
asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
|
|
|
|
for (i = 0; i < nr_entries; i++) {
|
|
*toc_entry = *toc_entry + offset;
|
|
toc_entry++;
|
|
}
|
|
}
|
|
|
|
static void reloc_toc(void)
|
|
{
|
|
unsigned long offset = reloc_offset();
|
|
unsigned long nr_entries =
|
|
(__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
|
|
|
|
__reloc_toc(offset, nr_entries);
|
|
|
|
mb();
|
|
}
|
|
|
|
static void unreloc_toc(void)
|
|
{
|
|
unsigned long offset = reloc_offset();
|
|
unsigned long nr_entries =
|
|
(__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
|
|
|
|
mb();
|
|
|
|
__reloc_toc(-offset, nr_entries);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_SVM
|
|
/*
|
|
* Perform the Enter Secure Mode ultracall.
|
|
*/
|
|
static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
|
|
{
|
|
register unsigned long r3 asm("r3") = UV_ESM;
|
|
register unsigned long r4 asm("r4") = kbase;
|
|
register unsigned long r5 asm("r5") = fdt;
|
|
|
|
asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
|
|
|
|
return r3;
|
|
}
|
|
|
|
/*
|
|
* Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
|
|
*/
|
|
static void setup_secure_guest(unsigned long kbase, unsigned long fdt)
|
|
{
|
|
int ret;
|
|
|
|
if (!prom_svm_enable)
|
|
return;
|
|
|
|
/* Switch to secure mode. */
|
|
prom_printf("Switching to secure mode.\n");
|
|
|
|
ret = enter_secure_mode(kbase, fdt);
|
|
if (ret != U_SUCCESS) {
|
|
prom_printf("Returned %d from switching to secure mode.\n", ret);
|
|
prom_rtas_os_term("Switch to secure mode failed.\n");
|
|
}
|
|
}
|
|
#else
|
|
static void setup_secure_guest(unsigned long kbase, unsigned long fdt)
|
|
{
|
|
}
|
|
#endif /* CONFIG_PPC_SVM */
|
|
|
|
/*
|
|
* We enter here early on, when the Open Firmware prom is still
|
|
* handling exceptions and the MMU hash table for us.
|
|
*/
|
|
|
|
unsigned long __init prom_init(unsigned long r3, unsigned long r4,
|
|
unsigned long pp,
|
|
unsigned long r6, unsigned long r7,
|
|
unsigned long kbase)
|
|
{
|
|
unsigned long hdr;
|
|
|
|
#ifdef CONFIG_PPC32
|
|
unsigned long offset = reloc_offset();
|
|
reloc_got2(offset);
|
|
#else
|
|
reloc_toc();
|
|
#endif
|
|
|
|
/*
|
|
* First zero the BSS
|
|
*/
|
|
memset(&__bss_start, 0, __bss_stop - __bss_start);
|
|
|
|
/*
|
|
* Init interface to Open Firmware, get some node references,
|
|
* like /chosen
|
|
*/
|
|
prom_init_client_services(pp);
|
|
|
|
/*
|
|
* See if this OF is old enough that we need to do explicit maps
|
|
* and other workarounds
|
|
*/
|
|
prom_find_mmu();
|
|
|
|
/*
|
|
* Init prom stdout device
|
|
*/
|
|
prom_init_stdout();
|
|
|
|
prom_printf("Preparing to boot %s", linux_banner);
|
|
|
|
/*
|
|
* Get default machine type. At this point, we do not differentiate
|
|
* between pSeries SMP and pSeries LPAR
|
|
*/
|
|
of_platform = prom_find_machine_type();
|
|
prom_printf("Detected machine type: %x\n", of_platform);
|
|
|
|
#ifndef CONFIG_NONSTATIC_KERNEL
|
|
/* Bail if this is a kdump kernel. */
|
|
if (PHYSICAL_START > 0)
|
|
prom_panic("Error: You can't boot a kdump kernel from OF!\n");
|
|
#endif
|
|
|
|
/*
|
|
* Check for an initrd
|
|
*/
|
|
prom_check_initrd(r3, r4);
|
|
|
|
/*
|
|
* Do early parsing of command line
|
|
*/
|
|
early_cmdline_parse();
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
/*
|
|
* On pSeries, inform the firmware about our capabilities
|
|
*/
|
|
if (of_platform == PLATFORM_PSERIES ||
|
|
of_platform == PLATFORM_PSERIES_LPAR)
|
|
prom_send_capabilities();
|
|
#endif
|
|
|
|
/*
|
|
* Copy the CPU hold code
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC)
|
|
copy_and_flush(0, kbase, 0x100, 0);
|
|
|
|
/*
|
|
* Initialize memory management within prom_init
|
|
*/
|
|
prom_init_mem();
|
|
|
|
/*
|
|
* Determine which cpu is actually running right _now_
|
|
*/
|
|
prom_find_boot_cpu();
|
|
|
|
/*
|
|
* Initialize display devices
|
|
*/
|
|
prom_check_displays();
|
|
|
|
#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
|
|
/*
|
|
* Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
|
|
* that uses the allocator, we need to make sure we get the top of memory
|
|
* available for us here...
|
|
*/
|
|
if (of_platform == PLATFORM_PSERIES)
|
|
prom_initialize_tce_table();
|
|
#endif
|
|
|
|
/*
|
|
* On non-powermacs, try to instantiate RTAS. PowerMacs don't
|
|
* have a usable RTAS implementation.
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC)
|
|
prom_instantiate_rtas();
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/* instantiate sml */
|
|
prom_instantiate_sml();
|
|
#endif
|
|
|
|
/*
|
|
* On non-powermacs, put all CPUs in spin-loops.
|
|
*
|
|
* PowerMacs use a different mechanism to spin CPUs
|
|
*
|
|
* (This must be done after instanciating RTAS)
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC)
|
|
prom_hold_cpus();
|
|
|
|
/*
|
|
* Fill in some infos for use by the kernel later on
|
|
*/
|
|
if (prom_memory_limit) {
|
|
__be64 val = cpu_to_be64(prom_memory_limit);
|
|
prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
|
|
&val, sizeof(val));
|
|
}
|
|
#ifdef CONFIG_PPC64
|
|
if (prom_iommu_off)
|
|
prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
|
|
NULL, 0);
|
|
|
|
if (prom_iommu_force_on)
|
|
prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
|
|
NULL, 0);
|
|
|
|
if (prom_tce_alloc_start) {
|
|
prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
|
|
&prom_tce_alloc_start,
|
|
sizeof(prom_tce_alloc_start));
|
|
prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
|
|
&prom_tce_alloc_end,
|
|
sizeof(prom_tce_alloc_end));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Fixup any known bugs in the device-tree
|
|
*/
|
|
fixup_device_tree();
|
|
|
|
/*
|
|
* Now finally create the flattened device-tree
|
|
*/
|
|
prom_printf("copying OF device tree...\n");
|
|
flatten_device_tree();
|
|
|
|
/*
|
|
* in case stdin is USB and still active on IBM machines...
|
|
* Unfortunately quiesce crashes on some powermacs if we have
|
|
* closed stdin already (in particular the powerbook 101).
|
|
*/
|
|
if (of_platform != PLATFORM_POWERMAC)
|
|
prom_close_stdin();
|
|
|
|
/*
|
|
* Call OF "quiesce" method to shut down pending DMA's from
|
|
* devices etc...
|
|
*/
|
|
prom_printf("Quiescing Open Firmware ...\n");
|
|
call_prom("quiesce", 0, 0);
|
|
|
|
/*
|
|
* And finally, call the kernel passing it the flattened device
|
|
* tree and NULL as r5, thus triggering the new entry point which
|
|
* is common to us and kexec
|
|
*/
|
|
hdr = dt_header_start;
|
|
|
|
/* Don't print anything after quiesce under OPAL, it crashes OFW */
|
|
prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
|
|
prom_debug("->dt_header_start=0x%lx\n", hdr);
|
|
|
|
#ifdef CONFIG_PPC32
|
|
reloc_got2(-offset);
|
|
#else
|
|
unreloc_toc();
|
|
#endif
|
|
|
|
/* Move to secure memory if we're supposed to be secure guests. */
|
|
setup_secure_guest(kbase, hdr);
|
|
|
|
__start(hdr, kbase, 0, 0, 0, 0, 0);
|
|
|
|
return 0;
|
|
}
|