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/* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
* 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>
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? */
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);
return;
}
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;
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);
/* 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; }
#ifdef CONFIG_SUN4
if (sparc_cpu_model != sun4) {
prom_printf("This kernel is for Sun4 architecture only.\n");
prom_halt();
}
#endif
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;
default:
printk("UNKNOWN!\n");
break;
};
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#elif defined(CONFIG_PROM_CONSOLE)
conswitchp = &prom_con;
#endif
boot_flags_init(*cmdline_p);
idprom_init();
if (ARCH_SUN4C_SUN4)
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) &&
((*(<
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