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linux_old1/arch/sparc64/kernel/setup.c

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/* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
* linux/arch/sparc64/kernel/setup.c
*
* Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#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/syscalls.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/inet.h>
#include <linux/console.h>
#include <linux/root_dev.h>
#include <linux/interrupt.h>
#include <linux/cpu.h>
#include <linux/initrd.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/idprom.h>
#include <asm/head.h>
#include <asm/starfire.h>
#include <asm/mmu_context.h>
#include <asm/timer.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/mmu.h>
#ifdef CONFIG_IP_PNP
#include <net/ipconfig.h>
#endif
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, /* unused, ega_bx, unused */
54, /* orig-video-lines */
0, /* orig-video-isVGA */
16 /* orig-video-points */
};
void (*prom_palette)(int);
void (*prom_keyboard)(void);
static void
prom_console_write(struct console *con, const char *s, unsigned n)
{
prom_write(s, n);
}
unsigned int boot_flags = 0;
#define BOOTME_DEBUG 0x1
#define BOOTME_SINGLE 0x2
/* Exported for mm/init.c:paging_init. */
unsigned long cmdline_memory_size = 0;
static struct console prom_debug_console = {
.name = "debug",
.write = prom_console_write,
.flags = CON_PRINTBUFFER,
.index = -1,
};
/* XXX Implement this at some point... */
void kernel_enter_debugger(void)
{
}
int obp_system_intr(void)
{
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;
case 'p':
/* Use PROM debug console. */
register_console(&prom_debug_console);
break;
case 'P':
/* Force UltraSPARC-III P-Cache on. */
if (tlb_type != cheetah) {
printk("BOOT: Ignoring P-Cache force option.\n");
break;
}
cheetah_pcache_forced_on = 1;
add_taint(TAINT_MACHINE_CHECK);
cheetah_enable_pcache();
break;
default:
printk("Unknown boot switch (-%c)\n", c);
break;
}
}
static void __init process_console(char *commands)
{
serial_console = 0;
commands += 8;
/* Linux-style serial */
if (!strncmp(commands, "ttyS", 4))
serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
else if (!strncmp(commands, "tty", 3)) {
char c = *(commands + 3);
/* Solaris-style serial */
if (c == 'a' || c == 'b') {
serial_console = c - 'a' + 1;
prom_printf ("Using /dev/tty%c as console.\n", c);
}
/* else Linux-style fbcon, not serial */
}
#if defined(CONFIG_PROM_CONSOLE)
if (!strncmp(commands, "prom", 4)) {
char *p;
for (p = commands - 8; *p && *p != ' '; p++)
*p = ' ';
conswitchp = &prom_con;
}
#endif
}
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, "console=", 8)) {
process_console(commands);
} else 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++;
}
}
extern void panic_setup(char *, int *);
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];
static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
void __init per_cpu_patch(void)
{
struct cpuid_patch_entry *p;
unsigned long ver;
int is_jbus;
if (tlb_type == spitfire && !this_is_starfire)
return;
is_jbus = 0;
if (tlb_type != hypervisor) {
__asm__ ("rdpr %%ver, %0" : "=r" (ver));
is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
(ver >> 32UL) == __SERRANO_ID);
}
p = &__cpuid_patch;
while (p < &__cpuid_patch_end) {
unsigned long addr = p->addr;
unsigned int *insns;
switch (tlb_type) {
case spitfire:
insns = &p->starfire[0];
break;
case cheetah:
case cheetah_plus:
if (is_jbus)
insns = &p->cheetah_jbus[0];
else
insns = &p->cheetah_safari[0];
break;
case hypervisor:
insns = &p->sun4v[0];
break;
default:
prom_printf("Unknown cpu type, halting.\n");
prom_halt();
};
*(unsigned int *) (addr + 0) = insns[0];
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 0));
*(unsigned int *) (addr + 4) = insns[1];
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 4));
*(unsigned int *) (addr + 8) = insns[2];
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 8));
*(unsigned int *) (addr + 12) = insns[3];
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 12));
p++;
}
}
void __init sun4v_patch(void)
{
struct sun4v_1insn_patch_entry *p1;
struct sun4v_2insn_patch_entry *p2;
if (tlb_type != hypervisor)
return;
p1 = &__sun4v_1insn_patch;
while (p1 < &__sun4v_1insn_patch_end) {
unsigned long addr = p1->addr;
*(unsigned int *) (addr + 0) = p1->insn;
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 0));
p1++;
}
p2 = &__sun4v_2insn_patch;
while (p2 < &__sun4v_2insn_patch_end) {
unsigned long addr = p2->addr;
*(unsigned int *) (addr + 0) = p2->insns[0];
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 0));
*(unsigned int *) (addr + 4) = p2->insns[1];
wmb();
__asm__ __volatile__("flush %0" : : "r" (addr + 4));
p2++;
}
}
#ifdef CONFIG_SMP
void __init boot_cpu_id_too_large(int cpu)
{
prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
cpu, NR_CPUS);
prom_halt();
}
#endif
void __init setup_arch(char **cmdline_p)
{
/* Initialize PROM console and command line. */
*cmdline_p = prom_getbootargs();
strcpy(saved_command_line, *cmdline_p);
if (tlb_type == hypervisor)
printk("ARCH: SUN4V\n");
else
printk("ARCH: SUN4U\n");
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#elif defined(CONFIG_PROM_CONSOLE)
conswitchp = &prom_con;
#endif
boot_flags_init(*cmdline_p);
idprom_init();
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
task_thread_info(&init_task)->kregs = &fake_swapper_regs;
#ifdef CONFIG_IP_PNP
if (!ic_set_manually) {
int chosen = prom_finddevice ("/chosen");
u32 cl, sv, gw;
cl = prom_getintdefault (chosen, "client-ip", 0);
sv = prom_getintdefault (chosen, "server-ip", 0);
gw = prom_getintdefault (chosen, "gateway-ip", 0);
if (cl && sv) {
ic_myaddr = cl;
ic_servaddr = sv;
if (gw)
ic_gateway = gw;
#if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
ic_proto_enabled = 0;
#endif
}
}
#endif
/* Get boot processor trap_block[] setup. */
init_cur_cpu_trap(current_thread_info());
paging_init();
smp_setup_cpu_possible_map();
}
static int __init set_preferred_console(void)
{
int idev, odev;
/* The user has requested a console so this is already set up. */
if (serial_console >= 0)
return -EBUSY;
idev = prom_query_input_device();
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_IRSC && odev == PROMDEV_ORSC) {
serial_console = 3;
} else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
/* sunhv_console_init() doesn't check the serial_console
* value anyways...
*/
serial_console = 4;
return add_preferred_console("ttyHV", 0, NULL);
} else {
prom_printf("Inconsistent console: "
"input %d, output %d\n",
idev, odev);
prom_halt();
}
if (serial_console)
return add_preferred_console("ttyS", serial_console - 1, NULL);
return -ENODEV;
}
console_initcall(set_preferred_console);
/* BUFFER is PAGE_SIZE bytes long. */
extern char *sparc_cpu_type;
extern char *sparc_fpu_type;
extern void smp_info(struct seq_file *);
extern void smp_bogo(struct seq_file *);
extern void mmu_info(struct seq_file *);
unsigned int dcache_parity_tl1_occurred;
unsigned int icache_parity_tl1_occurred;
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"
"prom\t\t: %s\n"
"type\t\t: %s\n"
"ncpus probed\t: %d\n"
"ncpus active\t: %d\n"
"D$ parity tl1\t: %u\n"
"I$ parity tl1\t: %u\n"
#ifndef CONFIG_SMP
"Cpu0Bogo\t: %lu.%02lu\n"
"Cpu0ClkTck\t: %016lx\n"
#endif
,
sparc_cpu_type,
sparc_fpu_type,
prom_version,
((tlb_type == hypervisor) ?
"sun4v" :
"sun4u"),
ncpus_probed,
num_online_cpus(),
dcache_parity_tl1_occurred,
icache_parity_tl1_occurred
#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)
{
}
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;
prom_printf("\n");
flush_user_windows();
prom_cmdline();
}
int serial_console = -1;
int stop_a_enabled = 1;
static int __init topology_init(void)
{
int i, err;
err = -ENOMEM;
/* 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_probed = 0;
while (!cpu_find_by_instance(ncpus_probed, NULL, NULL))
ncpus_probed++;
for_each_possible_cpu(i) {
struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p) {
register_cpu(p, i, NULL);
err = 0;
}
}
return err;
}
subsys_initcall(topology_init);
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