427 строки
9.2 KiB
C
427 строки
9.2 KiB
C
/*
|
|
* linux/arch/sparc/kernel/setup.c
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/initrd.h>
|
|
#include <asm/smp.h>
|
|
#include <linux/user.h>
|
|
#include <linux/screen_info.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/major.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/console.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/kdebug.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/io.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/vaddrs.h>
|
|
#include <asm/mbus.h>
|
|
#include <asm/idprom.h>
|
|
#include <asm/machines.h>
|
|
#include <asm/cpudata.h>
|
|
#include <asm/setup.h>
|
|
|
|
#include "kernel.h"
|
|
|
|
struct screen_info screen_info = {
|
|
0, 0, /* orig-x, orig-y */
|
|
0, /* unused */
|
|
0, /* orig-video-page */
|
|
0, /* orig-video-mode */
|
|
128, /* orig-video-cols */
|
|
0,0,0, /* ega_ax, ega_bx, ega_cx */
|
|
54, /* orig-video-lines */
|
|
0, /* orig-video-isVGA */
|
|
16 /* orig-video-points */
|
|
};
|
|
|
|
/* Typing sync at the prom prompt calls the function pointed to by
|
|
* romvec->pv_synchook which I set to the following function.
|
|
* This should sync all filesystems and return, for now it just
|
|
* prints out pretty messages and returns.
|
|
*/
|
|
|
|
extern unsigned long trapbase;
|
|
|
|
/* Pretty sick eh? */
|
|
static void prom_sync_me(void)
|
|
{
|
|
unsigned long prom_tbr, flags;
|
|
|
|
/* XXX Badly broken. FIX! - Anton */
|
|
local_irq_save(flags);
|
|
__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
|
|
__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t" : : "r" (&trapbase));
|
|
|
|
prom_printf("PROM SYNC COMMAND...\n");
|
|
show_free_areas();
|
|
if(current->pid != 0) {
|
|
local_irq_enable();
|
|
sys_sync();
|
|
local_irq_disable();
|
|
}
|
|
prom_printf("Returning to prom\n");
|
|
|
|
__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t" : : "r" (prom_tbr));
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static unsigned int boot_flags __initdata = 0;
|
|
#define BOOTME_DEBUG 0x1
|
|
|
|
/* Exported for mm/init.c:paging_init. */
|
|
unsigned long cmdline_memory_size __initdata = 0;
|
|
|
|
static void
|
|
prom_console_write(struct console *con, const char *s, unsigned n)
|
|
{
|
|
prom_write(s, n);
|
|
}
|
|
|
|
static struct console prom_debug_console = {
|
|
.name = "debug",
|
|
.write = prom_console_write,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
/*
|
|
* Process kernel command line switches that are specific to the
|
|
* SPARC or that require special low-level processing.
|
|
*/
|
|
static void __init process_switch(char c)
|
|
{
|
|
switch (c) {
|
|
case 'd':
|
|
boot_flags |= BOOTME_DEBUG;
|
|
break;
|
|
case 's':
|
|
break;
|
|
case 'h':
|
|
prom_printf("boot_flags_init: Halt!\n");
|
|
prom_halt();
|
|
break;
|
|
case 'p':
|
|
/* Use PROM debug console. */
|
|
register_console(&prom_debug_console);
|
|
break;
|
|
default:
|
|
printk("Unknown boot switch (-%c)\n", c);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void __init boot_flags_init(char *commands)
|
|
{
|
|
while (*commands) {
|
|
/* Move to the start of the next "argument". */
|
|
while (*commands && *commands == ' ')
|
|
commands++;
|
|
|
|
/* Process any command switches, otherwise skip it. */
|
|
if (*commands == '\0')
|
|
break;
|
|
if (*commands == '-') {
|
|
commands++;
|
|
while (*commands && *commands != ' ')
|
|
process_switch(*commands++);
|
|
continue;
|
|
}
|
|
if (!strncmp(commands, "mem=", 4)) {
|
|
/*
|
|
* "mem=XXX[kKmM] overrides the PROM-reported
|
|
* memory size.
|
|
*/
|
|
cmdline_memory_size = simple_strtoul(commands + 4,
|
|
&commands, 0);
|
|
if (*commands == 'K' || *commands == 'k') {
|
|
cmdline_memory_size <<= 10;
|
|
commands++;
|
|
} else if (*commands=='M' || *commands=='m') {
|
|
cmdline_memory_size <<= 20;
|
|
commands++;
|
|
}
|
|
}
|
|
while (*commands && *commands != ' ')
|
|
commands++;
|
|
}
|
|
}
|
|
|
|
/* This routine will in the future do all the nasty prom stuff
|
|
* to probe for the mmu type and its parameters, etc. This will
|
|
* also be where SMP things happen.
|
|
*/
|
|
|
|
extern void sun4c_probe_vac(void);
|
|
extern char cputypval;
|
|
extern unsigned long start, end;
|
|
|
|
extern unsigned short root_flags;
|
|
extern unsigned short root_dev;
|
|
extern unsigned short ram_flags;
|
|
#define RAMDISK_IMAGE_START_MASK 0x07FF
|
|
#define RAMDISK_PROMPT_FLAG 0x8000
|
|
#define RAMDISK_LOAD_FLAG 0x4000
|
|
|
|
extern int root_mountflags;
|
|
|
|
char reboot_command[COMMAND_LINE_SIZE];
|
|
|
|
enum sparc_cpu sparc_cpu_model;
|
|
EXPORT_SYMBOL(sparc_cpu_model);
|
|
|
|
struct tt_entry *sparc_ttable;
|
|
|
|
struct pt_regs fake_swapper_regs;
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
int i;
|
|
unsigned long highest_paddr;
|
|
|
|
sparc_ttable = (struct tt_entry *) &start;
|
|
|
|
/* Initialize PROM console and command line. */
|
|
*cmdline_p = prom_getbootargs();
|
|
strcpy(boot_command_line, *cmdline_p);
|
|
parse_early_param();
|
|
|
|
/* Set sparc_cpu_model */
|
|
sparc_cpu_model = sun_unknown;
|
|
if (!strcmp(&cputypval,"sun4 "))
|
|
sparc_cpu_model = sun4;
|
|
if (!strcmp(&cputypval,"sun4c"))
|
|
sparc_cpu_model = sun4c;
|
|
if (!strcmp(&cputypval,"sun4m"))
|
|
sparc_cpu_model = sun4m;
|
|
if (!strcmp(&cputypval,"sun4s"))
|
|
sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
|
|
if (!strcmp(&cputypval,"sun4d"))
|
|
sparc_cpu_model = sun4d;
|
|
if (!strcmp(&cputypval,"sun4e"))
|
|
sparc_cpu_model = sun4e;
|
|
if (!strcmp(&cputypval,"sun4u"))
|
|
sparc_cpu_model = sun4u;
|
|
if (!strncmp(&cputypval, "leon" , 4))
|
|
sparc_cpu_model = sparc_leon;
|
|
|
|
printk("ARCH: ");
|
|
switch(sparc_cpu_model) {
|
|
case sun4:
|
|
printk("SUN4\n");
|
|
break;
|
|
case sun4c:
|
|
printk("SUN4C\n");
|
|
break;
|
|
case sun4m:
|
|
printk("SUN4M\n");
|
|
break;
|
|
case sun4d:
|
|
printk("SUN4D\n");
|
|
break;
|
|
case sun4e:
|
|
printk("SUN4E\n");
|
|
break;
|
|
case sun4u:
|
|
printk("SUN4U\n");
|
|
break;
|
|
case sparc_leon:
|
|
printk("LEON\n");
|
|
break;
|
|
default:
|
|
printk("UNKNOWN!\n");
|
|
break;
|
|
};
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
boot_flags_init(*cmdline_p);
|
|
|
|
idprom_init();
|
|
if (ARCH_SUN4C)
|
|
sun4c_probe_vac();
|
|
load_mmu();
|
|
|
|
phys_base = 0xffffffffUL;
|
|
highest_paddr = 0UL;
|
|
for (i = 0; sp_banks[i].num_bytes != 0; i++) {
|
|
unsigned long top;
|
|
|
|
if (sp_banks[i].base_addr < phys_base)
|
|
phys_base = sp_banks[i].base_addr;
|
|
top = sp_banks[i].base_addr +
|
|
sp_banks[i].num_bytes;
|
|
if (highest_paddr < top)
|
|
highest_paddr = top;
|
|
}
|
|
pfn_base = phys_base >> PAGE_SHIFT;
|
|
|
|
if (!root_flags)
|
|
root_mountflags &= ~MS_RDONLY;
|
|
ROOT_DEV = old_decode_dev(root_dev);
|
|
#ifdef CONFIG_BLK_DEV_RAM
|
|
rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
|
|
rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
|
|
rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
|
|
#endif
|
|
|
|
prom_setsync(prom_sync_me);
|
|
|
|
if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
|
|
((*(short *)linux_dbvec) != -1)) {
|
|
printk("Booted under KADB. Syncing trap table.\n");
|
|
(*(linux_dbvec->teach_debugger))();
|
|
}
|
|
|
|
init_mm.context = (unsigned long) NO_CONTEXT;
|
|
init_task.thread.kregs = &fake_swapper_regs;
|
|
|
|
paging_init();
|
|
|
|
smp_setup_cpu_possible_map();
|
|
}
|
|
|
|
static int ncpus_probed;
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *__unused)
|
|
{
|
|
seq_printf(m,
|
|
"cpu\t\t: %s\n"
|
|
"fpu\t\t: %s\n"
|
|
"promlib\t\t: Version %d Revision %d\n"
|
|
"prom\t\t: %d.%d\n"
|
|
"type\t\t: %s\n"
|
|
"ncpus probed\t: %d\n"
|
|
"ncpus active\t: %d\n"
|
|
#ifndef CONFIG_SMP
|
|
"CPU0Bogo\t: %lu.%02lu\n"
|
|
"CPU0ClkTck\t: %ld\n"
|
|
#endif
|
|
,
|
|
sparc_cpu_type,
|
|
sparc_fpu_type ,
|
|
romvec->pv_romvers,
|
|
prom_rev,
|
|
romvec->pv_printrev >> 16,
|
|
romvec->pv_printrev & 0xffff,
|
|
&cputypval,
|
|
ncpus_probed,
|
|
num_online_cpus()
|
|
#ifndef CONFIG_SMP
|
|
, cpu_data(0).udelay_val/(500000/HZ),
|
|
(cpu_data(0).udelay_val/(5000/HZ)) % 100,
|
|
cpu_data(0).clock_tick
|
|
#endif
|
|
);
|
|
|
|
#ifdef CONFIG_SMP
|
|
smp_bogo(m);
|
|
#endif
|
|
mmu_info(m);
|
|
#ifdef CONFIG_SMP
|
|
smp_info(m);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
/* The pointer we are returning is arbitrary,
|
|
* it just has to be non-NULL and not IS_ERR
|
|
* in the success case.
|
|
*/
|
|
return *pos == 0 ? &c_start : 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)
|
|
{
|
|
}
|
|
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start =c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|
|
extern int stop_a_enabled;
|
|
|
|
void sun_do_break(void)
|
|
{
|
|
if (!stop_a_enabled)
|
|
return;
|
|
|
|
printk("\n");
|
|
flush_user_windows();
|
|
|
|
prom_cmdline();
|
|
}
|
|
EXPORT_SYMBOL(sun_do_break);
|
|
|
|
int stop_a_enabled = 1;
|
|
|
|
static int __init topology_init(void)
|
|
{
|
|
int i, ncpus, err;
|
|
|
|
/* Count the number of physically present processors in
|
|
* the machine, even on uniprocessor, so that /proc/cpuinfo
|
|
* output is consistent with 2.4.x
|
|
*/
|
|
ncpus = 0;
|
|
while (!cpu_find_by_instance(ncpus, NULL, NULL))
|
|
ncpus++;
|
|
ncpus_probed = ncpus;
|
|
|
|
err = 0;
|
|
for_each_online_cpu(i) {
|
|
struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
if (!p)
|
|
err = -ENOMEM;
|
|
else
|
|
register_cpu(p, i);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
subsys_initcall(topology_init);
|