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linux-next/arch/powerpc/kernel/setup-common.c
Paul Mackerras 03501dab03 powerpc: Pull common bits of setup_{32,64}.c into setup-common.c 
This creates a new arch/powerpc/kernel/setup-common.c with various
bits that setup_32.c and setup_64.c had in common - functions like
machine_shutdown/restart/power_off, show_cpuinfo, set_preferred_console
etc.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-26 17:11:18 +10:00

413 lines
9.2 KiB
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/*
* 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/bootinfo.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 */
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