412 строки
9.2 KiB
C
412 строки
9.2 KiB
C
/*
|
|
* Common boot and setup code for both 32-bit and 64-bit.
|
|
* Extracted from arch/powerpc/kernel/setup_64.c.
|
|
*
|
|
* Copyright (C) 2001 PPC64 Team, IBM Corp
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/console.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <asm/io.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/elf.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/time.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/btext.h>
|
|
#include <asm/nvram.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/system.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/iommu.h>
|
|
#include <asm/serial.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/page.h>
|
|
#include <asm/mmu.h>
|
|
#include <asm/lmb.h>
|
|
|
|
#undef DEBUG
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) udbg_printf(fmt)
|
|
#else
|
|
#define DBG(fmt...)
|
|
#endif
|
|
|
|
/*
|
|
* This still seems to be needed... -- paulus
|
|
*/
|
|
struct screen_info screen_info = {
|
|
.orig_x = 0,
|
|
.orig_y = 25,
|
|
.orig_video_cols = 80,
|
|
.orig_video_lines = 25,
|
|
.orig_video_isVGA = 1,
|
|
.orig_video_points = 16
|
|
};
|
|
|
|
#ifdef __DO_IRQ_CANON
|
|
/* XXX should go elsewhere eventually */
|
|
int ppc_do_canonicalize_irqs;
|
|
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
|
|
#endif
|
|
|
|
/* also used by kexec */
|
|
void machine_shutdown(void)
|
|
{
|
|
if (ppc_md.nvram_sync)
|
|
ppc_md.nvram_sync();
|
|
}
|
|
|
|
void machine_restart(char *cmd)
|
|
{
|
|
machine_shutdown();
|
|
ppc_md.restart(cmd);
|
|
#ifdef CONFIG_SMP
|
|
smp_send_stop();
|
|
#endif
|
|
printk(KERN_EMERG "System Halted, OK to turn off power\n");
|
|
local_irq_disable();
|
|
while (1) ;
|
|
}
|
|
|
|
void machine_power_off(void)
|
|
{
|
|
machine_shutdown();
|
|
ppc_md.power_off();
|
|
#ifdef CONFIG_SMP
|
|
smp_send_stop();
|
|
#endif
|
|
printk(KERN_EMERG "System Halted, OK to turn off power\n");
|
|
local_irq_disable();
|
|
while (1) ;
|
|
}
|
|
/* Used by the G5 thermal driver */
|
|
EXPORT_SYMBOL_GPL(machine_power_off);
|
|
|
|
void (*pm_power_off)(void) = machine_power_off;
|
|
EXPORT_SYMBOL_GPL(pm_power_off);
|
|
|
|
void machine_halt(void)
|
|
{
|
|
machine_shutdown();
|
|
ppc_md.halt();
|
|
#ifdef CONFIG_SMP
|
|
smp_send_stop();
|
|
#endif
|
|
printk(KERN_EMERG "System Halted, OK to turn off power\n");
|
|
local_irq_disable();
|
|
while (1) ;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_TAU
|
|
extern u32 cpu_temp(unsigned long cpu);
|
|
extern u32 cpu_temp_both(unsigned long cpu);
|
|
#endif /* CONFIG_TAU */
|
|
|
|
#ifdef CONFIG_SMP
|
|
DEFINE_PER_CPU(unsigned int, pvr);
|
|
#endif
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
unsigned long cpu_id = (unsigned long)v - 1;
|
|
unsigned int pvr;
|
|
unsigned short maj;
|
|
unsigned short min;
|
|
|
|
if (cpu_id == NR_CPUS) {
|
|
#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
|
|
unsigned long bogosum = 0;
|
|
int i;
|
|
for (i = 0; i < NR_CPUS; ++i)
|
|
if (cpu_online(i))
|
|
bogosum += loops_per_jiffy;
|
|
seq_printf(m, "total bogomips\t: %lu.%02lu\n",
|
|
bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
|
|
#endif /* CONFIG_SMP && CONFIG_PPC32 */
|
|
seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
|
|
|
|
if (ppc_md.show_cpuinfo != NULL)
|
|
ppc_md.show_cpuinfo(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* We only show online cpus: disable preempt (overzealous, I
|
|
* knew) to prevent cpu going down. */
|
|
preempt_disable();
|
|
if (!cpu_online(cpu_id)) {
|
|
preempt_enable();
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
#ifdef CONFIG_PPC64 /* XXX for now */
|
|
pvr = per_cpu(pvr, cpu_id);
|
|
#else
|
|
pvr = cpu_data[cpu_id].pvr;
|
|
#endif
|
|
#else
|
|
pvr = mfspr(SPRN_PVR);
|
|
#endif
|
|
maj = (pvr >> 8) & 0xFF;
|
|
min = pvr & 0xFF;
|
|
|
|
seq_printf(m, "processor\t: %lu\n", cpu_id);
|
|
seq_printf(m, "cpu\t\t: ");
|
|
|
|
if (cur_cpu_spec->pvr_mask)
|
|
seq_printf(m, "%s", cur_cpu_spec->cpu_name);
|
|
else
|
|
seq_printf(m, "unknown (%08x)", pvr);
|
|
|
|
#ifdef CONFIG_ALTIVEC
|
|
if (cpu_has_feature(CPU_FTR_ALTIVEC))
|
|
seq_printf(m, ", altivec supported");
|
|
#endif /* CONFIG_ALTIVEC */
|
|
|
|
seq_printf(m, "\n");
|
|
|
|
#ifdef CONFIG_TAU
|
|
if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
|
|
#ifdef CONFIG_TAU_AVERAGE
|
|
/* more straightforward, but potentially misleading */
|
|
seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
|
|
cpu_temp(i));
|
|
#else
|
|
/* show the actual temp sensor range */
|
|
u32 temp;
|
|
temp = cpu_temp_both(i);
|
|
seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
|
|
temp & 0xff, temp >> 16);
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_TAU */
|
|
|
|
/*
|
|
* Assume here that all clock rates are the same in a
|
|
* smp system. -- Cort
|
|
*/
|
|
if (ppc_proc_freq)
|
|
seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
|
|
ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
|
|
|
|
if (ppc_md.show_percpuinfo != NULL)
|
|
ppc_md.show_percpuinfo(m, cpu_id);
|
|
|
|
/* If we are a Freescale core do a simple check so
|
|
* we dont have to keep adding cases in the future */
|
|
if (PVR_VER(pvr) & 0x8000) {
|
|
maj = PVR_MAJ(pvr);
|
|
min = PVR_MIN(pvr);
|
|
} else {
|
|
switch (PVR_VER(pvr)) {
|
|
case 0x0020: /* 403 family */
|
|
maj = PVR_MAJ(pvr) + 1;
|
|
min = PVR_MIN(pvr);
|
|
break;
|
|
case 0x1008: /* 740P/750P ?? */
|
|
maj = ((pvr >> 8) & 0xFF) - 1;
|
|
min = pvr & 0xFF;
|
|
break;
|
|
default:
|
|
maj = (pvr >> 8) & 0xFF;
|
|
min = pvr & 0xFF;
|
|
break;
|
|
}
|
|
}
|
|
|
|
seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
|
|
maj, min, PVR_VER(pvr), PVR_REV(pvr));
|
|
|
|
#ifdef CONFIG_PPC32
|
|
seq_printf(m, "bogomips\t: %lu.%02lu\n",
|
|
loops_per_jiffy / (500000/HZ),
|
|
(loops_per_jiffy / (5000/HZ)) % 100);
|
|
#endif
|
|
|
|
#ifdef CONFIG_SMP
|
|
seq_printf(m, "\n");
|
|
#endif
|
|
|
|
preempt_enable();
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
unsigned long i = *pos;
|
|
|
|
return i <= NR_CPUS ? (void *)(i + 1) : NULL;
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_start(m, pos);
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
struct seq_operations cpuinfo_op = {
|
|
.start =c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|
|
#ifdef CONFIG_PPC_MULTIPLATFORM
|
|
static int __init set_preferred_console(void)
|
|
{
|
|
struct device_node *prom_stdout = NULL;
|
|
char *name;
|
|
u32 *spd;
|
|
int offset = 0;
|
|
|
|
DBG(" -> set_preferred_console()\n");
|
|
|
|
/* The user has requested a console so this is already set up. */
|
|
if (strstr(saved_command_line, "console=")) {
|
|
DBG(" console was specified !\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!of_chosen) {
|
|
DBG(" of_chosen is NULL !\n");
|
|
return -ENODEV;
|
|
}
|
|
/* We are getting a weird phandle from OF ... */
|
|
/* ... So use the full path instead */
|
|
name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
|
|
if (name == NULL) {
|
|
DBG(" no linux,stdout-path !\n");
|
|
return -ENODEV;
|
|
}
|
|
prom_stdout = of_find_node_by_path(name);
|
|
if (!prom_stdout) {
|
|
DBG(" can't find stdout package %s !\n", name);
|
|
return -ENODEV;
|
|
}
|
|
DBG("stdout is %s\n", prom_stdout->full_name);
|
|
|
|
name = (char *)get_property(prom_stdout, "name", NULL);
|
|
if (!name) {
|
|
DBG(" stdout package has no name !\n");
|
|
goto not_found;
|
|
}
|
|
spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);
|
|
|
|
if (0)
|
|
;
|
|
#ifdef CONFIG_SERIAL_8250_CONSOLE
|
|
else if (strcmp(name, "serial") == 0) {
|
|
int i;
|
|
u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
|
|
if (i > 8) {
|
|
switch (reg[1]) {
|
|
case 0x3f8:
|
|
offset = 0;
|
|
break;
|
|
case 0x2f8:
|
|
offset = 1;
|
|
break;
|
|
case 0x898:
|
|
offset = 2;
|
|
break;
|
|
case 0x890:
|
|
offset = 3;
|
|
break;
|
|
default:
|
|
/* We dont recognise the serial port */
|
|
goto not_found;
|
|
}
|
|
}
|
|
}
|
|
#endif /* CONFIG_SERIAL_8250_CONSOLE */
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
else if (strcmp(name, "vty") == 0) {
|
|
u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
|
|
char *compat = (char *)get_property(prom_stdout, "compatible", NULL);
|
|
|
|
if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
|
|
/* Host Virtual Serial Interface */
|
|
int offset;
|
|
switch (reg[0]) {
|
|
case 0x30000000:
|
|
offset = 0;
|
|
break;
|
|
case 0x30000001:
|
|
offset = 1;
|
|
break;
|
|
default:
|
|
goto not_found;
|
|
}
|
|
of_node_put(prom_stdout);
|
|
DBG("Found hvsi console at offset %d\n", offset);
|
|
return add_preferred_console("hvsi", offset, NULL);
|
|
} else {
|
|
/* pSeries LPAR virtual console */
|
|
of_node_put(prom_stdout);
|
|
DBG("Found hvc console\n");
|
|
return add_preferred_console("hvc", 0, NULL);
|
|
}
|
|
}
|
|
#endif /* CONFIG_PPC_PSERIES */
|
|
#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
|
|
else if (strcmp(name, "ch-a") == 0)
|
|
offset = 0;
|
|
else if (strcmp(name, "ch-b") == 0)
|
|
offset = 1;
|
|
#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
|
|
else
|
|
goto not_found;
|
|
of_node_put(prom_stdout);
|
|
|
|
DBG("Found serial console at ttyS%d\n", offset);
|
|
|
|
if (spd) {
|
|
static char __initdata opt[16];
|
|
sprintf(opt, "%d", *spd);
|
|
return add_preferred_console("ttyS", offset, opt);
|
|
} else
|
|
return add_preferred_console("ttyS", offset, NULL);
|
|
|
|
not_found:
|
|
DBG("No preferred console found !\n");
|
|
of_node_put(prom_stdout);
|
|
return -ENODEV;
|
|
}
|
|
console_initcall(set_preferred_console);
|
|
#endif /* CONFIG_PPC_MULTIPLATFORM */
|