mirror of https://gitee.com/openkylin/linux.git
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* init.c: PROM library initialisation code.
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*
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* Copyright (C) 1998 Harald Koerfgen
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* Copyright (C) 2002, 2004 Maciej W. Rozycki
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/linkage.h>
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#include <linux/smp.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <asm/bootinfo.h>
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#include <asm/cpu.h>
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#include <asm/cpu-type.h>
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#include <asm/processor.h>
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#include <asm/dec/prom.h>
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int (*__rex_bootinit)(void);
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int (*__rex_bootread)(void);
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int (*__rex_getbitmap)(memmap *);
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unsigned long *(*__rex_slot_address)(int);
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void *(*__rex_gettcinfo)(void);
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int (*__rex_getsysid)(void);
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void (*__rex_clear_cache)(void);
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int (*__prom_getchar)(void);
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char *(*__prom_getenv)(char *);
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int (*__prom_printf)(char *, ...);
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int (*__pmax_open)(char*, int);
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int (*__pmax_lseek)(int, long, int);
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int (*__pmax_read)(int, void *, int);
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int (*__pmax_close)(int);
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/*
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* Detect which PROM the DECSTATION has, and set the callback vectors
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* appropriately.
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*/
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void __init which_prom(s32 magic, s32 *prom_vec)
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{
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/*
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* No sign of the REX PROM's magic number means we assume a non-REX
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* machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx)
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*/
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if (prom_is_rex(magic)) {
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/*
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* Set up prom abstraction structure with REX entry points.
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*/
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__rex_bootinit =
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(void *)(long)*(prom_vec + REX_PROM_BOOTINIT);
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__rex_bootread =
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(void *)(long)*(prom_vec + REX_PROM_BOOTREAD);
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__rex_getbitmap =
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(void *)(long)*(prom_vec + REX_PROM_GETBITMAP);
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__prom_getchar =
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(void *)(long)*(prom_vec + REX_PROM_GETCHAR);
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__prom_getenv =
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(void *)(long)*(prom_vec + REX_PROM_GETENV);
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__rex_getsysid =
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(void *)(long)*(prom_vec + REX_PROM_GETSYSID);
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__rex_gettcinfo =
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(void *)(long)*(prom_vec + REX_PROM_GETTCINFO);
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__prom_printf =
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(void *)(long)*(prom_vec + REX_PROM_PRINTF);
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__rex_slot_address =
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(void *)(long)*(prom_vec + REX_PROM_SLOTADDR);
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__rex_clear_cache =
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(void *)(long)*(prom_vec + REX_PROM_CLEARCACHE);
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} else {
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/*
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* Set up prom abstraction structure with non-REX entry points.
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*/
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__prom_getchar = (void *)PMAX_PROM_GETCHAR;
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__prom_getenv = (void *)PMAX_PROM_GETENV;
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__prom_printf = (void *)PMAX_PROM_PRINTF;
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__pmax_open = (void *)PMAX_PROM_OPEN;
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__pmax_lseek = (void *)PMAX_PROM_LSEEK;
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__pmax_read = (void *)PMAX_PROM_READ;
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__pmax_close = (void *)PMAX_PROM_CLOSE;
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}
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}
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void __init prom_init(void)
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{
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extern void dec_machine_halt(void);
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static const char cpu_msg[] __initconst =
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"Sorry, this kernel is compiled for a wrong CPU type!\n";
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s32 argc = fw_arg0;
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s32 *argv = (void *)fw_arg1;
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u32 magic = fw_arg2;
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s32 *prom_vec = (void *)fw_arg3;
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/*
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* Determine which PROM we have
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* (and therefore which machine we're on!)
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*/
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which_prom(magic, prom_vec);
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if (prom_is_rex(magic))
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rex_clear_cache();
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/* Register the early console. */
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register_prom_console();
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/* Were we compiled with the right CPU option? */
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#if defined(CONFIG_CPU_R3000)
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if ((current_cpu_type() == CPU_R4000SC) ||
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(current_cpu_type() == CPU_R4400SC)) {
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static const char r4k_msg[] __initconst =
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"Please recompile with \"CONFIG_CPU_R4x00 = y\".\n";
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printk(cpu_msg);
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printk(r4k_msg);
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dec_machine_halt();
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}
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#endif
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#if defined(CONFIG_CPU_R4X00)
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if ((current_cpu_type() == CPU_R3000) ||
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(current_cpu_type() == CPU_R3000A)) {
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static const char r3k_msg[] __initconst =
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"Please recompile with \"CONFIG_CPU_R3000 = y\".\n";
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printk(cpu_msg);
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printk(r3k_msg);
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dec_machine_halt();
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}
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#endif
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prom_meminit(magic);
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prom_identify_arch(magic);
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prom_init_cmdline(argc, argv, magic);
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}
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