forked from luck/tmp_suning_uos_patched
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
477 lines
11 KiB
C
477 lines
11 KiB
C
/* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
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* linux/arch/sparc/kernel/setup.c
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 2000 Anton Blanchard (anton@samba.org)
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/initrd.h>
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#include <asm/smp.h>
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#include <linux/user.h>
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#include <linux/a.out.h>
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#include <linux/tty.h>
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#include <linux/delay.h>
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#include <linux/config.h>
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#include <linux/fs.h>
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#include <linux/seq_file.h>
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#include <linux/syscalls.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/console.h>
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#include <linux/spinlock.h>
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#include <linux/root_dev.h>
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#include <asm/segment.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/oplib.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/traps.h>
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#include <asm/vaddrs.h>
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#include <asm/kdebug.h>
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#include <asm/mbus.h>
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#include <asm/idprom.h>
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#include <asm/machines.h>
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#include <asm/cpudata.h>
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#include <asm/setup.h>
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struct screen_info screen_info = {
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0, 0, /* orig-x, orig-y */
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0, /* unused */
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0, /* orig-video-page */
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0, /* orig-video-mode */
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128, /* orig-video-cols */
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0,0,0, /* ega_ax, ega_bx, ega_cx */
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54, /* orig-video-lines */
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0, /* orig-video-isVGA */
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16 /* orig-video-points */
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};
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/* Typing sync at the prom prompt calls the function pointed to by
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* romvec->pv_synchook which I set to the following function.
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* This should sync all filesystems and return, for now it just
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* prints out pretty messages and returns.
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*/
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extern unsigned long trapbase;
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void (*prom_palette)(int);
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/* Pretty sick eh? */
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void prom_sync_me(void)
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{
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unsigned long prom_tbr, flags;
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/* XXX Badly broken. FIX! - Anton */
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local_irq_save(flags);
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__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
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__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t" : : "r" (&trapbase));
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if (prom_palette)
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prom_palette(1);
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prom_printf("PROM SYNC COMMAND...\n");
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show_free_areas();
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if(current->pid != 0) {
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local_irq_enable();
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sys_sync();
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local_irq_disable();
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}
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prom_printf("Returning to prom\n");
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__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t" : : "r" (prom_tbr));
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local_irq_restore(flags);
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return;
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}
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unsigned int boot_flags __initdata = 0;
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#define BOOTME_DEBUG 0x1
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#define BOOTME_SINGLE 0x2
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/* Exported for mm/init.c:paging_init. */
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unsigned long cmdline_memory_size __initdata = 0;
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static void
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prom_console_write(struct console *con, const char *s, unsigned n)
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{
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prom_write(s, n);
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}
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static struct console prom_debug_console = {
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.name = "debug",
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.write = prom_console_write,
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.flags = CON_PRINTBUFFER,
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.index = -1,
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};
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int obp_system_intr(void)
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{
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if (boot_flags & BOOTME_DEBUG) {
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printk("OBP: system interrupted\n");
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prom_halt();
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return 1;
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}
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return 0;
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}
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/*
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* Process kernel command line switches that are specific to the
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* SPARC or that require special low-level processing.
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*/
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static void __init process_switch(char c)
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{
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switch (c) {
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case 'd':
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boot_flags |= BOOTME_DEBUG;
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break;
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case 's':
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boot_flags |= BOOTME_SINGLE;
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break;
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case 'h':
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prom_printf("boot_flags_init: Halt!\n");
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prom_halt();
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break;
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case 'p':
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/* Use PROM debug console. */
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register_console(&prom_debug_console);
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break;
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default:
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printk("Unknown boot switch (-%c)\n", c);
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break;
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}
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}
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static void __init process_console(char *commands)
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{
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serial_console = 0;
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commands += 8;
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/* Linux-style serial */
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if (!strncmp(commands, "ttyS", 4))
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serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
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else if (!strncmp(commands, "tty", 3)) {
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char c = *(commands + 3);
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/* Solaris-style serial */
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if (c == 'a' || c == 'b')
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serial_console = c - 'a' + 1;
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/* else Linux-style fbcon, not serial */
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}
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#if defined(CONFIG_PROM_CONSOLE)
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if (!strncmp(commands, "prom", 4)) {
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char *p;
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for (p = commands - 8; *p && *p != ' '; p++)
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*p = ' ';
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conswitchp = &prom_con;
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}
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#endif
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}
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static void __init boot_flags_init(char *commands)
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{
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while (*commands) {
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/* Move to the start of the next "argument". */
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while (*commands && *commands == ' ')
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commands++;
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/* Process any command switches, otherwise skip it. */
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if (*commands == '\0')
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break;
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if (*commands == '-') {
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commands++;
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while (*commands && *commands != ' ')
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process_switch(*commands++);
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continue;
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}
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if (!strncmp(commands, "console=", 8)) {
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process_console(commands);
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} else if (!strncmp(commands, "mem=", 4)) {
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/*
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* "mem=XXX[kKmM] overrides the PROM-reported
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* memory size.
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*/
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cmdline_memory_size = simple_strtoul(commands + 4,
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&commands, 0);
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if (*commands == 'K' || *commands == 'k') {
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cmdline_memory_size <<= 10;
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commands++;
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} else if (*commands=='M' || *commands=='m') {
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cmdline_memory_size <<= 20;
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commands++;
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}
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}
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while (*commands && *commands != ' ')
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commands++;
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}
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}
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/* This routine will in the future do all the nasty prom stuff
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* to probe for the mmu type and its parameters, etc. This will
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* also be where SMP things happen plus the Sparc specific memory
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* physical memory probe as on the alpha.
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*/
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extern int prom_probe_memory(void);
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extern void sun4c_probe_vac(void);
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extern char cputypval;
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extern unsigned long start, end;
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extern void panic_setup(char *, int *);
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extern unsigned short root_flags;
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extern unsigned short root_dev;
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extern unsigned short ram_flags;
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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extern int root_mountflags;
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char reboot_command[COMMAND_LINE_SIZE];
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enum sparc_cpu sparc_cpu_model;
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struct tt_entry *sparc_ttable;
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struct pt_regs fake_swapper_regs;
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extern void paging_init(void);
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void __init setup_arch(char **cmdline_p)
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{
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int i;
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unsigned long highest_paddr;
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sparc_ttable = (struct tt_entry *) &start;
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/* Initialize PROM console and command line. */
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*cmdline_p = prom_getbootargs();
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strcpy(saved_command_line, *cmdline_p);
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/* Set sparc_cpu_model */
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sparc_cpu_model = sun_unknown;
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if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
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if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
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if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
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if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */
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if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
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if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
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if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
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#ifdef CONFIG_SUN4
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if (sparc_cpu_model != sun4) {
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prom_printf("This kernel is for Sun4 architecture only.\n");
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prom_halt();
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}
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#endif
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printk("ARCH: ");
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switch(sparc_cpu_model) {
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case sun4:
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printk("SUN4\n");
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break;
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case sun4c:
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printk("SUN4C\n");
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break;
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case sun4m:
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printk("SUN4M\n");
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break;
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case sun4d:
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printk("SUN4D\n");
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break;
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case sun4e:
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printk("SUN4E\n");
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break;
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case sun4u:
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printk("SUN4U\n");
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break;
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default:
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printk("UNKNOWN!\n");
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break;
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};
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#elif defined(CONFIG_PROM_CONSOLE)
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conswitchp = &prom_con;
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#endif
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boot_flags_init(*cmdline_p);
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idprom_init();
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if (ARCH_SUN4C_SUN4)
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sun4c_probe_vac();
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load_mmu();
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(void) prom_probe_memory();
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phys_base = 0xffffffffUL;
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highest_paddr = 0UL;
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for (i = 0; sp_banks[i].num_bytes != 0; i++) {
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unsigned long top;
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if (sp_banks[i].base_addr < phys_base)
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phys_base = sp_banks[i].base_addr;
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top = sp_banks[i].base_addr +
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sp_banks[i].num_bytes;
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if (highest_paddr < top)
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highest_paddr = top;
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}
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pfn_base = phys_base >> PAGE_SHIFT;
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if (!root_flags)
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root_mountflags &= ~MS_RDONLY;
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ROOT_DEV = old_decode_dev(root_dev);
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#ifdef CONFIG_BLK_DEV_INITRD
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rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
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rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
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rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
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#endif
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prom_setsync(prom_sync_me);
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if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
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((*(short *)linux_dbvec) != -1)) {
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printk("Booted under KADB. Syncing trap table.\n");
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(*(linux_dbvec->teach_debugger))();
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}
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init_mm.context = (unsigned long) NO_CONTEXT;
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init_task.thread.kregs = &fake_swapper_regs;
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paging_init();
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}
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static int __init set_preferred_console(void)
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{
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int idev, odev;
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/* The user has requested a console so this is already set up. */
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if (serial_console >= 0)
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return -EBUSY;
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idev = prom_query_input_device();
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odev = prom_query_output_device();
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if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
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serial_console = 0;
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} else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
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serial_console = 1;
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} else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
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serial_console = 2;
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} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
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prom_printf("MrCoffee ttya\n");
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serial_console = 1;
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} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
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serial_console = 0;
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prom_printf("MrCoffee keyboard\n");
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} else {
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prom_printf("Confusing console (idev %d, odev %d)\n",
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idev, odev);
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serial_console = 1;
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}
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if (serial_console)
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return add_preferred_console("ttyS", serial_console - 1, NULL);
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return -ENODEV;
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}
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console_initcall(set_preferred_console);
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extern char *sparc_cpu_type;
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extern char *sparc_fpu_type;
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static int show_cpuinfo(struct seq_file *m, void *__unused)
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{
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seq_printf(m,
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"cpu\t\t: %s\n"
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"fpu\t\t: %s\n"
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"promlib\t\t: Version %d Revision %d\n"
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"prom\t\t: %d.%d\n"
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"type\t\t: %s\n"
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"ncpus probed\t: %d\n"
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"ncpus active\t: %d\n"
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#ifndef CONFIG_SMP
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"CPU0Bogo\t: %lu.%02lu\n"
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"CPU0ClkTck\t: %ld\n"
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#endif
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,
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sparc_cpu_type ? sparc_cpu_type : "undetermined",
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sparc_fpu_type ? sparc_fpu_type : "undetermined",
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romvec->pv_romvers,
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prom_rev,
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romvec->pv_printrev >> 16,
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romvec->pv_printrev & 0xffff,
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&cputypval,
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num_possible_cpus(),
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num_online_cpus()
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#ifndef CONFIG_SMP
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, cpu_data(0).udelay_val/(500000/HZ),
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(cpu_data(0).udelay_val/(5000/HZ)) % 100,
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cpu_data(0).clock_tick
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#endif
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);
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#ifdef CONFIG_SMP
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smp_bogo(m);
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#endif
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mmu_info(m);
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#ifdef CONFIG_SMP
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smp_info(m);
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#endif
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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/* The pointer we are returning is arbitrary,
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* it just has to be non-NULL and not IS_ERR
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* in the success case.
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*/
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return *pos == 0 ? &c_start : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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struct seq_operations cpuinfo_op = {
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.start =c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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extern int stop_a_enabled;
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void sun_do_break(void)
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{
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if (!stop_a_enabled)
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return;
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printk("\n");
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flush_user_windows();
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prom_cmdline();
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}
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int serial_console = -1;
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int stop_a_enabled = 1;
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