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linux-next/arch/sparc64/kernel/setup.c
David S. Miller ebd8c56c5a [SPARC64]: Fix uniprocessor IRQ targetting on SUN4V.
We need to use the real hardware processor ID when
targetting interrupts, not the "define to 0" thing
the uniprocessor build gives us.

Also, fill in the Node-ID and Agent-ID fields properly
on sun4u/Safari.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 01:13:24 -08:00

555 lines
12 KiB
C

/* $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 };
static 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++;
}
}
static 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++;
}
}
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
/* Work out if we are starfire early on */
check_if_starfire();
/* Now we know enough to patch the get_cpuid sequences
* used by trap code.
*/
per_cpu_patch();
sun4v_patch();
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_INITRD
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
smp_setup_cpu_possible_map();
paging_init();
/* Get boot processor trap_block[] setup. */
init_cur_cpu_trap(current_thread_info());
}
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"
"promlib\t\t: Version 3 Revision %d\n"
"prom\t\t: %d.%d.%d\n"
"type\t\t: sun4u\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_rev,
prom_prev >> 16,
(prom_prev >> 8) & 0xff,
prom_prev & 0xff,
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 (i = 0; i < NR_CPUS; i++) {
if (cpu_possible(i)) {
struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL);
if (p) {
memset(p, 0, sizeof(*p));
register_cpu(p, i, NULL);
err = 0;
}
}
}
return err;
}
subsys_initcall(topology_init);