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09d3f3f0e0
Many years ago when this driver was written, it had a use, but these days it's nothing but trouble and distributions should not enable it in any situation. Pretty much every console device a sparc machine could see has a bonafide real driver, making the PROM console hack unnecessary. If any new device shows up, we should write a driver instead of depending upon this crutch to save us. We've been able to take care of this even when no chip documentation exists (sunxvr500, sunxvr2500) so there are no excuses. Signed-off-by: David S. Miller <davem@davemloft.net>
432 lines
9.2 KiB
C
432 lines
9.2 KiB
C
/*
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* linux/arch/sparc64/kernel/setup.c
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*
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* Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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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 <asm/smp.h>
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#include <linux/user.h>
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#include <linux/screen_info.h>
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#include <linux/delay.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/inet.h>
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#include <linux/console.h>
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#include <linux/root_dev.h>
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#include <linux/interrupt.h>
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#include <linux/cpu.h>
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#include <linux/initrd.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/idprom.h>
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#include <asm/head.h>
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#include <asm/starfire.h>
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#include <asm/mmu_context.h>
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#include <asm/timer.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/mmu.h>
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#include <asm/ns87303.h>
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#ifdef CONFIG_IP_PNP
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#include <net/ipconfig.h>
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#endif
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#include "entry.h"
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#include "kernel.h"
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/* Used to synchronize accesses to NatSemi SUPER I/O chip configure
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* operations in asm/ns87303.h
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*/
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DEFINE_SPINLOCK(ns87303_lock);
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EXPORT_SYMBOL(ns87303_lock);
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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, /* unused, ega_bx, unused */
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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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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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/* Exported for mm/init.c:paging_init. */
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unsigned long cmdline_memory_size = 0;
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static struct console prom_early_console = {
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.name = "earlyprom",
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.write = prom_console_write,
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.flags = CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME,
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.index = -1,
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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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case 's':
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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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/* Just ignore, this behavior is now the default. */
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break;
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case 'P':
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/* Force UltraSPARC-III P-Cache on. */
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if (tlb_type != cheetah) {
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printk("BOOT: Ignoring P-Cache force option.\n");
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break;
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}
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cheetah_pcache_forced_on = 1;
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add_taint(TAINT_MACHINE_CHECK);
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cheetah_enable_pcache();
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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 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, "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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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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static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
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void __init per_cpu_patch(void)
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{
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struct cpuid_patch_entry *p;
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unsigned long ver;
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int is_jbus;
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if (tlb_type == spitfire && !this_is_starfire)
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return;
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is_jbus = 0;
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if (tlb_type != hypervisor) {
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__asm__ ("rdpr %%ver, %0" : "=r" (ver));
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is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
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(ver >> 32UL) == __SERRANO_ID);
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}
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p = &__cpuid_patch;
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while (p < &__cpuid_patch_end) {
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unsigned long addr = p->addr;
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unsigned int *insns;
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switch (tlb_type) {
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case spitfire:
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insns = &p->starfire[0];
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break;
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case cheetah:
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case cheetah_plus:
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if (is_jbus)
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insns = &p->cheetah_jbus[0];
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else
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insns = &p->cheetah_safari[0];
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break;
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case hypervisor:
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insns = &p->sun4v[0];
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break;
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default:
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prom_printf("Unknown cpu type, halting.\n");
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prom_halt();
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};
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*(unsigned int *) (addr + 0) = insns[0];
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 0));
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*(unsigned int *) (addr + 4) = insns[1];
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 4));
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*(unsigned int *) (addr + 8) = insns[2];
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 8));
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*(unsigned int *) (addr + 12) = insns[3];
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 12));
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p++;
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}
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}
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void __init sun4v_patch(void)
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{
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extern void sun4v_hvapi_init(void);
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struct sun4v_1insn_patch_entry *p1;
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struct sun4v_2insn_patch_entry *p2;
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if (tlb_type != hypervisor)
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return;
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p1 = &__sun4v_1insn_patch;
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while (p1 < &__sun4v_1insn_patch_end) {
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unsigned long addr = p1->addr;
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*(unsigned int *) (addr + 0) = p1->insn;
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 0));
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p1++;
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}
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p2 = &__sun4v_2insn_patch;
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while (p2 < &__sun4v_2insn_patch_end) {
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unsigned long addr = p2->addr;
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*(unsigned int *) (addr + 0) = p2->insns[0];
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 0));
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*(unsigned int *) (addr + 4) = p2->insns[1];
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wmb();
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__asm__ __volatile__("flush %0" : : "r" (addr + 4));
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p2++;
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}
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sun4v_hvapi_init();
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}
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#ifdef CONFIG_SMP
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void __init boot_cpu_id_too_large(int cpu)
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{
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prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
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cpu, NR_CPUS);
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prom_halt();
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}
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#endif
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void __init setup_arch(char **cmdline_p)
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{
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/* Initialize PROM console and command line. */
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*cmdline_p = prom_getbootargs();
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strcpy(boot_command_line, *cmdline_p);
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parse_early_param();
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boot_flags_init(*cmdline_p);
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register_console(&prom_early_console);
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if (tlb_type == hypervisor)
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printk("ARCH: SUN4V\n");
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else
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printk("ARCH: SUN4U\n");
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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idprom_init();
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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_RAM
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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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task_thread_info(&init_task)->kregs = &fake_swapper_regs;
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#ifdef CONFIG_IP_PNP
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if (!ic_set_manually) {
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int chosen = prom_finddevice ("/chosen");
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u32 cl, sv, gw;
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cl = prom_getintdefault (chosen, "client-ip", 0);
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sv = prom_getintdefault (chosen, "server-ip", 0);
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gw = prom_getintdefault (chosen, "gateway-ip", 0);
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if (cl && sv) {
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ic_myaddr = cl;
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ic_servaddr = sv;
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if (gw)
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ic_gateway = gw;
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#if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
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ic_proto_enabled = 0;
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#endif
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}
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}
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#endif
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/* Get boot processor trap_block[] setup. */
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init_cur_cpu_trap(current_thread_info());
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paging_init();
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}
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/* BUFFER is PAGE_SIZE bytes long. */
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extern void smp_info(struct seq_file *);
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extern void smp_bogo(struct seq_file *);
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extern void mmu_info(struct seq_file *);
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unsigned int dcache_parity_tl1_occurred;
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unsigned int icache_parity_tl1_occurred;
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int ncpus_probed;
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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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"pmu\t\t: %s\n"
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"prom\t\t: %s\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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"D$ parity tl1\t: %u\n"
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"I$ parity tl1\t: %u\n"
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#ifndef CONFIG_SMP
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"Cpu0ClkTck\t: %016lx\n"
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#endif
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,
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sparc_cpu_type,
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sparc_fpu_type,
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sparc_pmu_type,
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prom_version,
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((tlb_type == hypervisor) ?
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"sun4v" :
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"sun4u"),
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ncpus_probed,
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num_online_cpus(),
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dcache_parity_tl1_occurred,
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icache_parity_tl1_occurred
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#ifndef CONFIG_SMP
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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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const 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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prom_printf("\n");
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flush_user_windows();
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prom_cmdline();
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}
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EXPORT_SYMBOL(sun_do_break);
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int stop_a_enabled = 1;
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EXPORT_SYMBOL(stop_a_enabled);
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