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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 <asm/smp.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/delay.h>
#include <linux/config.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/blk.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/console.h>
#include <linux/spinlock.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/kgdb.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/kdebug.h>
#include <asm/mbus.h>
#include <asm/idprom.h>
#include <asm/softirq.h>
#include <asm/hardirq.h>
#include <asm/machines.h>
#undef PROM_DEBUG_CONSOLE
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;
extern int serial_console;
extern void breakpoint(void);
#if CONFIG_SUN_CONSOLE
void (*prom_palette)(int);
#endif
asmlinkage void sys_sync(void); /* it's really int */
/* Pretty sick eh? */
void prom_sync_me(void)
{
unsigned long prom_tbr, flags;
/* XXX Badly broken. FIX! - Anton */
save_and_cli(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));
#ifdef CONFIG_SUN_CONSOLE
if (prom_palette)
prom_palette(1);
#endif
prom_printf("PROM SYNC COMMAND...\n");
show_free_areas();
if(current->pid != 0) {
sti();
sys_sync();
cli();
}
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));
restore_flags(flags);
return;
}
extern void rs_kgdb_hook(int tty_num); /* sparc/serial.c */
unsigned int boot_flags __initdata = 0;
#define BOOTME_DEBUG 0x1
#define BOOTME_SINGLE 0x2
#define BOOTME_KGDBA 0x4
#define BOOTME_KGDBB 0x8
#define BOOTME_KGDB 0xc
#ifdef CONFIG_SUN_CONSOLE
static int console_fb __initdata = 0;
#endif
/* Exported for mm/init.c:paging_init. */
unsigned long cmdline_memory_size __initdata = 0;
void kernel_enter_debugger(void)
{
if (boot_flags & BOOTME_KGDB) {
printk("KGDB: Entered\n");
breakpoint();
}
}
int obp_system_intr(void)
{
if (boot_flags & BOOTME_KGDB) {
printk("KGDB: system interrupted\n");
breakpoint();
return 1;
}
if (boot_flags & BOOTME_DEBUG) {
printk("OBP: system interrupted\n");
prom_halt();
return 1;
}
return 0;
}
/*
* 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':
boot_flags |= BOOTME_SINGLE;
break;
case 'h':
prom_printf("boot_flags_init: Halt!\n");
prom_halt();
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;
else if (*commands == '-') {
commands++;
while (*commands && *commands != ' ')
process_switch(*commands++);
} else if (strlen(commands) >= 9
&& !strncmp(commands, "kgdb=tty", 8)) {
switch (commands[8]) {
#ifdef CONFIG_SUN_SERIAL
case 'a':
boot_flags |= BOOTME_KGDBA;
prom_printf("KGDB: Using serial line /dev/ttya.\n");
break;
case 'b':
boot_flags |= BOOTME_KGDBB;
prom_printf("KGDB: Using serial line /dev/ttyb.\n");
break;
#endif
default:
printk("KGDB: Unknown tty line.\n");
break;
}
commands += 9;
} else {
#if CONFIG_SUN_CONSOLE
if (!strncmp(commands, "console=", 8)) {
commands += 8;
if (!strncmp (commands, "ttya", 4)) {
console_fb = 2;
prom_printf ("Using /dev/ttya as console.\n");
} else if (!strncmp (commands, "ttyb", 4)) {
console_fb = 3;
prom_printf ("Using /dev/ttyb as console.\n");
#if defined(CONFIG_PROM_CONSOLE)
} else if (!strncmp (commands, "prom", 4)) {
char *p;
for (p = commands - 8; *p && *p != ' '; p++)
*p = ' ';
conswitchp = &prom_con;
console_fb = 1;
#endif
} else {
console_fb = 1;
}
} else
#endif
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 plus the Sparc specific memory
* physical memory probe as on the alpha.
*/
extern int prom_probe_memory(void);
extern void sun4c_probe_vac(void);
extern char cputypval;
extern unsigned long start, end;
extern void panic_setup(char *, int *);
extern void srmmu_end_memory(unsigned long, unsigned long *);
extern void sun_serial_setup(void);
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 saved_command_line[256];
char reboot_command[256];
enum sparc_cpu sparc_cpu_model;
struct tt_entry *sparc_ttable;
struct pt_regs fake_swapper_regs;
#ifdef PROM_DEBUG_CONSOLE
static void
prom_console_write(struct console *con, const char *s, unsigned n)
{
prom_printf("%s", s);
}
static struct console prom_console = {
name: "debug",
write: prom_console_write,
flags: CON_PRINTBUFFER,
index: -1,
};
#endif
extern void paging_init(void);
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(saved_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 PROM_DEBUG_CONSOLE
register_console(&prom_console);
#endif
#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();
(void) prom_probe_memory();
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;
}
if (!root_flags)
root_mountflags &= ~MS_RDONLY;
ROOT_DEV = to_kdev_t(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 !CONFIG_SUN_SERIAL
serial_console = 0;
#else
switch (console_fb) {
case 0: /* Let get our io devices from prom */
{
int idev = prom_query_input_device();
int odev = prom_query_output_device();
if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
serial_console = 0;
} else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
serial_console = 1;
} else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
serial_console = 2;
} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
prom_printf("MrCoffee ttya\n");
serial_console = 1;
} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
serial_console = 0;
prom_printf("MrCoffee keyboard\n");
} else {
prom_printf("Inconsistent or unknown console\n");
prom_printf("You cannot mix serial and non serial input/output devices\n");
prom_halt();
}
}
break;
case 1: serial_console = 0; break; /* Force one of the framebuffers as console */
case 2: serial_console = 1; break; /* Force ttya as console */
case 3: serial_console = 2; break; /* Force ttyb as console */
}
#endif
}
if ((boot_flags & BOOTME_KGDBA)) {
rs_kgdb_hook(0);
}
if ((boot_flags & BOOTME_KGDBB)) {
rs_kgdb_hook(1);
}
if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
((*(short *)linux_dbvec) != -1)) {
printk("Booted under KADB. Syncing trap table.\n");
(*(linux_dbvec->teach_debugger))();
}
if((boot_flags & BOOTME_KGDB)) {
set_debug_traps();
prom_printf ("Breakpoint!\n");
breakpoint();
}
init_mm.context = (unsigned long) NO_CONTEXT;
init_task.thread.kregs = &fake_swapper_regs;
if (serial_console)
conswitchp = NULL;
paging_init();
}
asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
{
return -EIO;
}
extern char *sparc_cpu_type[];
extern char *sparc_fpu_type[];
static int show_cpuinfo(struct seq_file *m, void *__unused)
{
int cpuid = hard_smp_processor_id();
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
"BogoMips\t: %lu.%02lu\n"
#endif
,
sparc_cpu_type[cpuid] ? : "undetermined",
sparc_fpu_type[cpuid] ? : "undetermined",
romvec->pv_romvers,
prom_rev,
romvec->pv_printrev >> 16,
(short) romvec->pv_printrev,
&cputypval,
linux_num_cpus,
smp_num_cpus
#ifndef CONFIG_SMP
, loops_per_jiffy/(500000/HZ),
(loops_per_jiffy/(5000/HZ)) % 100
#endif
);
#ifdef CONFIG_SMP
smp_bogo_info(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)
{
}
struct seq_operations cpuinfo_op = {
start: c_start,
next: c_next,
stop: c_stop,
show: show_cpuinfo,
};
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