574 lines
13 KiB
C
574 lines
13 KiB
C
/*
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* Common boot and setup code for both 32-bit and 64-bit.
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* Extracted from arch/powerpc/kernel/setup_64.c.
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*
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* Copyright (C) 2001 PPC64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/reboot.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/platform_device.h>
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#include <linux/seq_file.h>
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#include <linux/ioport.h>
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#include <linux/console.h>
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#include <linux/utsname.h>
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#include <linux/screen_info.h>
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#include <linux/root_dev.h>
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#include <linux/notifier.h>
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#include <linux/cpu.h>
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#include <linux/unistd.h>
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#include <linux/serial.h>
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#include <linux/serial_8250.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/processor.h>
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#include <asm/vdso_datapage.h>
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#include <asm/pgtable.h>
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#include <asm/smp.h>
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#include <asm/elf.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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#include <asm/cputable.h>
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#include <asm/sections.h>
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#include <asm/firmware.h>
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#include <asm/btext.h>
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#include <asm/nvram.h>
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#include <asm/setup.h>
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#include <asm/system.h>
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#include <asm/rtas.h>
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#include <asm/iommu.h>
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#include <asm/serial.h>
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#include <asm/cache.h>
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#include <asm/page.h>
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#include <asm/mmu.h>
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#include <asm/lmb.h>
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#include <asm/xmon.h>
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#include "setup.h"
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#ifdef DEBUG
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#include <asm/udbg.h>
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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/* The main machine-dep calls structure
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*/
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struct machdep_calls ppc_md;
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EXPORT_SYMBOL(ppc_md);
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struct machdep_calls *machine_id;
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EXPORT_SYMBOL(machine_id);
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unsigned long klimit = (unsigned long) _end;
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/*
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* This still seems to be needed... -- paulus
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*/
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struct screen_info screen_info = {
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.orig_x = 0,
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.orig_y = 25,
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.orig_video_cols = 80,
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.orig_video_lines = 25,
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.orig_video_isVGA = 1,
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.orig_video_points = 16
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};
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#ifdef __DO_IRQ_CANON
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/* XXX should go elsewhere eventually */
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int ppc_do_canonicalize_irqs;
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EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
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#endif
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/* also used by kexec */
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void machine_shutdown(void)
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{
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if (ppc_md.machine_shutdown)
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ppc_md.machine_shutdown();
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}
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void machine_restart(char *cmd)
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{
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machine_shutdown();
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if (ppc_md.restart)
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ppc_md.restart(cmd);
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#ifdef CONFIG_SMP
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smp_send_stop();
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#endif
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printk(KERN_EMERG "System Halted, OK to turn off power\n");
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local_irq_disable();
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while (1) ;
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}
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void machine_power_off(void)
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{
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machine_shutdown();
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if (ppc_md.power_off)
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ppc_md.power_off();
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#ifdef CONFIG_SMP
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smp_send_stop();
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#endif
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printk(KERN_EMERG "System Halted, OK to turn off power\n");
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local_irq_disable();
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while (1) ;
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}
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/* Used by the G5 thermal driver */
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EXPORT_SYMBOL_GPL(machine_power_off);
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void (*pm_power_off)(void) = machine_power_off;
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EXPORT_SYMBOL_GPL(pm_power_off);
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void machine_halt(void)
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{
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machine_shutdown();
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if (ppc_md.halt)
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ppc_md.halt();
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#ifdef CONFIG_SMP
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smp_send_stop();
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#endif
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printk(KERN_EMERG "System Halted, OK to turn off power\n");
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local_irq_disable();
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while (1) ;
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}
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#ifdef CONFIG_TAU
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extern u32 cpu_temp(unsigned long cpu);
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extern u32 cpu_temp_both(unsigned long cpu);
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#endif /* CONFIG_TAU */
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#ifdef CONFIG_SMP
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DEFINE_PER_CPU(unsigned int, pvr);
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#endif
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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unsigned long cpu_id = (unsigned long)v - 1;
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unsigned int pvr;
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unsigned short maj;
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unsigned short min;
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if (cpu_id == NR_CPUS) {
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#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
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unsigned long bogosum = 0;
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int i;
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for_each_online_cpu(i)
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bogosum += loops_per_jiffy;
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seq_printf(m, "total bogomips\t: %lu.%02lu\n",
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bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
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#endif /* CONFIG_SMP && CONFIG_PPC32 */
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seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
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if (ppc_md.name)
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seq_printf(m, "platform\t: %s\n", ppc_md.name);
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if (ppc_md.show_cpuinfo != NULL)
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ppc_md.show_cpuinfo(m);
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return 0;
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}
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/* We only show online cpus: disable preempt (overzealous, I
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* knew) to prevent cpu going down. */
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preempt_disable();
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if (!cpu_online(cpu_id)) {
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preempt_enable();
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return 0;
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}
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#ifdef CONFIG_SMP
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pvr = per_cpu(pvr, cpu_id);
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#else
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pvr = mfspr(SPRN_PVR);
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#endif
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maj = (pvr >> 8) & 0xFF;
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min = pvr & 0xFF;
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seq_printf(m, "processor\t: %lu\n", cpu_id);
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seq_printf(m, "cpu\t\t: ");
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if (cur_cpu_spec->pvr_mask)
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seq_printf(m, "%s", cur_cpu_spec->cpu_name);
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else
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seq_printf(m, "unknown (%08x)", pvr);
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#ifdef CONFIG_ALTIVEC
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if (cpu_has_feature(CPU_FTR_ALTIVEC))
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seq_printf(m, ", altivec supported");
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#endif /* CONFIG_ALTIVEC */
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seq_printf(m, "\n");
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#ifdef CONFIG_TAU
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if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
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#ifdef CONFIG_TAU_AVERAGE
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/* more straightforward, but potentially misleading */
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seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
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cpu_temp(cpu_id));
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#else
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/* show the actual temp sensor range */
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u32 temp;
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temp = cpu_temp_both(cpu_id);
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seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
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temp & 0xff, temp >> 16);
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#endif
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}
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#endif /* CONFIG_TAU */
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/*
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* Assume here that all clock rates are the same in a
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* smp system. -- Cort
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*/
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if (ppc_proc_freq)
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seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
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ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
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if (ppc_md.show_percpuinfo != NULL)
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ppc_md.show_percpuinfo(m, cpu_id);
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/* If we are a Freescale core do a simple check so
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* we dont have to keep adding cases in the future */
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if (PVR_VER(pvr) & 0x8000) {
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maj = PVR_MAJ(pvr);
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min = PVR_MIN(pvr);
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} else {
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switch (PVR_VER(pvr)) {
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case 0x0020: /* 403 family */
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maj = PVR_MAJ(pvr) + 1;
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min = PVR_MIN(pvr);
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break;
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case 0x1008: /* 740P/750P ?? */
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maj = ((pvr >> 8) & 0xFF) - 1;
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min = pvr & 0xFF;
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break;
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default:
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maj = (pvr >> 8) & 0xFF;
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min = pvr & 0xFF;
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break;
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}
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}
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seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
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maj, min, PVR_VER(pvr), PVR_REV(pvr));
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#ifdef CONFIG_PPC32
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seq_printf(m, "bogomips\t: %lu.%02lu\n",
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loops_per_jiffy / (500000/HZ),
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(loops_per_jiffy / (5000/HZ)) % 100);
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#endif
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#ifdef CONFIG_SMP
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seq_printf(m, "\n");
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#endif
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preempt_enable();
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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unsigned long i = *pos;
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return i <= NR_CPUS ? (void *)(i + 1) : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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struct seq_operations cpuinfo_op = {
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.start =c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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void __init check_for_initrd(void)
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{
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#ifdef CONFIG_BLK_DEV_INITRD
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DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n",
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initrd_start, initrd_end);
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/* If we were passed an initrd, set the ROOT_DEV properly if the values
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* look sensible. If not, clear initrd reference.
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*/
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if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
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initrd_end > initrd_start)
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ROOT_DEV = Root_RAM0;
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else
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initrd_start = initrd_end = 0;
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if (initrd_start)
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printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
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DBG(" <- check_for_initrd()\n");
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#endif /* CONFIG_BLK_DEV_INITRD */
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}
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#ifdef CONFIG_SMP
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/**
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* setup_cpu_maps - initialize the following cpu maps:
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* cpu_possible_map
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* cpu_present_map
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* cpu_sibling_map
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*
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* Having the possible map set up early allows us to restrict allocations
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* of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
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*
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* We do not initialize the online map here; cpus set their own bits in
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* cpu_online_map as they come up.
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*
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* This function is valid only for Open Firmware systems. finish_device_tree
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* must be called before using this.
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*
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* While we're here, we may as well set the "physical" cpu ids in the paca.
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*
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* NOTE: This must match the parsing done in early_init_dt_scan_cpus.
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*/
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void __init smp_setup_cpu_maps(void)
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{
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struct device_node *dn = NULL;
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int cpu = 0;
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while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
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const int *intserv;
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int j, len = sizeof(u32), nthreads = 1;
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intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
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&len);
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if (intserv)
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nthreads = len / sizeof(int);
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else {
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intserv = of_get_property(dn, "reg", NULL);
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if (!intserv)
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intserv = &cpu; /* assume logical == phys */
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}
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for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
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cpu_set(cpu, cpu_present_map);
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set_hard_smp_processor_id(cpu, intserv[j]);
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cpu_set(cpu, cpu_possible_map);
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cpu++;
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}
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}
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#ifdef CONFIG_PPC64
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/*
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* On pSeries LPAR, we need to know how many cpus
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* could possibly be added to this partition.
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*/
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if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
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(dn = of_find_node_by_path("/rtas"))) {
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int num_addr_cell, num_size_cell, maxcpus;
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const unsigned int *ireg;
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num_addr_cell = of_n_addr_cells(dn);
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num_size_cell = of_n_size_cells(dn);
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ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);
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if (!ireg)
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goto out;
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maxcpus = ireg[num_addr_cell + num_size_cell];
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/* Double maxcpus for processors which have SMT capability */
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if (cpu_has_feature(CPU_FTR_SMT))
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maxcpus *= 2;
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if (maxcpus > NR_CPUS) {
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printk(KERN_WARNING
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"Partition configured for %d cpus, "
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"operating system maximum is %d.\n",
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maxcpus, NR_CPUS);
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maxcpus = NR_CPUS;
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} else
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printk(KERN_INFO "Partition configured for %d cpus.\n",
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maxcpus);
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for (cpu = 0; cpu < maxcpus; cpu++)
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cpu_set(cpu, cpu_possible_map);
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out:
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of_node_put(dn);
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}
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/*
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* Do the sibling map; assume only two threads per processor.
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*/
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for_each_possible_cpu(cpu) {
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cpu_set(cpu, cpu_sibling_map[cpu]);
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if (cpu_has_feature(CPU_FTR_SMT))
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cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
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}
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vdso_data->processorCount = num_present_cpus();
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#endif /* CONFIG_PPC64 */
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}
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#endif /* CONFIG_SMP */
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static __init int add_pcspkr(void)
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{
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struct device_node *np;
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struct platform_device *pd;
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int ret;
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np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
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of_node_put(np);
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if (!np)
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return -ENODEV;
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pd = platform_device_alloc("pcspkr", -1);
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if (!pd)
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return -ENOMEM;
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ret = platform_device_add(pd);
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if (ret)
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platform_device_put(pd);
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return ret;
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}
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device_initcall(add_pcspkr);
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void probe_machine(void)
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{
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extern struct machdep_calls __machine_desc_start;
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extern struct machdep_calls __machine_desc_end;
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/*
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* Iterate all ppc_md structures until we find the proper
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* one for the current machine type
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*/
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DBG("Probing machine type ...\n");
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for (machine_id = &__machine_desc_start;
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machine_id < &__machine_desc_end;
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machine_id++) {
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DBG(" %s ...", machine_id->name);
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memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
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if (ppc_md.probe()) {
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DBG(" match !\n");
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break;
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}
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DBG("\n");
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}
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/* What can we do if we didn't find ? */
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if (machine_id >= &__machine_desc_end) {
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DBG("No suitable machine found !\n");
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for (;;);
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}
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printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
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}
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/* Match a class of boards, not a specific device configuration. */
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int check_legacy_ioport(unsigned long base_port)
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{
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struct device_node *parent, *np = NULL;
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int ret = -ENODEV;
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switch(base_port) {
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case I8042_DATA_REG:
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np = of_find_node_by_type(NULL, "8042");
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break;
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case FDC_BASE: /* FDC1 */
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np = of_find_node_by_type(NULL, "fdc");
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break;
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#ifdef CONFIG_PPC_PREP
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case _PIDXR:
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case _PNPWRP:
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case PNPBIOS_BASE:
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/* implement me */
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#endif
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default:
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/* ipmi is supposed to fail here */
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break;
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}
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if (!np)
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return ret;
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parent = of_get_parent(np);
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if (parent) {
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if (strcmp(parent->type, "isa") == 0)
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ret = 0;
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of_node_put(parent);
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}
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of_node_put(np);
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return ret;
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}
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EXPORT_SYMBOL(check_legacy_ioport);
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static int ppc_panic_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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ppc_md.panic(ptr); /* May not return */
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return NOTIFY_DONE;
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}
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static struct notifier_block ppc_panic_block = {
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.notifier_call = ppc_panic_event,
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.priority = INT_MIN /* may not return; must be done last */
|
|
};
|
|
|
|
void __init setup_panic(void)
|
|
{
|
|
atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
|
|
}
|
|
|
|
#ifdef CONFIG_CHECK_CACHE_COHERENCY
|
|
/*
|
|
* For platforms that have configurable cache-coherency. This function
|
|
* checks that the cache coherency setting of the kernel matches the setting
|
|
* left by the firmware, as indicated in the device tree. Since a mismatch
|
|
* will eventually result in DMA failures, we print * and error and call
|
|
* BUG() in that case.
|
|
*/
|
|
|
|
#ifdef CONFIG_NOT_COHERENT_CACHE
|
|
#define KERNEL_COHERENCY 0
|
|
#else
|
|
#define KERNEL_COHERENCY 1
|
|
#endif
|
|
|
|
static int __init check_cache_coherency(void)
|
|
{
|
|
struct device_node *np;
|
|
const void *prop;
|
|
int devtree_coherency;
|
|
|
|
np = of_find_node_by_path("/");
|
|
prop = of_get_property(np, "coherency-off", NULL);
|
|
of_node_put(np);
|
|
|
|
devtree_coherency = prop ? 0 : 1;
|
|
|
|
if (devtree_coherency != KERNEL_COHERENCY) {
|
|
printk(KERN_ERR
|
|
"kernel coherency:%s != device tree_coherency:%s\n",
|
|
KERNEL_COHERENCY ? "on" : "off",
|
|
devtree_coherency ? "on" : "off");
|
|
BUG();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(check_cache_coherency);
|
|
#endif /* CONFIG_CHECK_CACHE_COHERENCY */
|