707 lines
16 KiB
C
707 lines
16 KiB
C
/* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
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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/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/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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#ifdef CONFIG_IP_PNP
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#include <net/ipconfig.h>
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#endif
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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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/* Typing sync at the prom prompt calls the function pointed to by
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* the sync callback 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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void (*prom_palette)(int);
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void (*prom_keyboard)(void);
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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_console = {
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.name = "prom",
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.write = prom_console_write,
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.flags = CON_CONSDEV | CON_ENABLED,
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.index = -1,
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};
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#define PROM_TRUE -1
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#define PROM_FALSE 0
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/* Pretty sick eh? */
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int prom_callback(long *args)
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{
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struct console *cons, *saved_console = NULL;
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unsigned long flags;
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char *cmd;
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extern spinlock_t prom_entry_lock;
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if (!args)
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return -1;
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if (!(cmd = (char *)args[0]))
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return -1;
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/*
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* The callback can be invoked on the cpu that first dropped
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* into prom_cmdline after taking the serial interrupt, or on
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* a slave processor that was smp_captured() if the
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* administrator has done a switch-cpu inside obp. In either
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* case, the cpu is marked as in-interrupt. Drop IRQ locks.
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*/
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irq_exit();
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/* XXX Revisit the locking here someday. This is a debugging
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* XXX feature so it isnt all that critical. -DaveM
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*/
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local_irq_save(flags);
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spin_unlock(&prom_entry_lock);
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cons = console_drivers;
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while (cons) {
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unregister_console(cons);
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cons->flags &= ~(CON_PRINTBUFFER);
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cons->next = saved_console;
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saved_console = cons;
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cons = console_drivers;
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}
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register_console(&prom_console);
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if (!strcmp(cmd, "sync")) {
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prom_printf("PROM `%s' command...\n", cmd);
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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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args[2] = 0;
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args[args[1] + 3] = -1;
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prom_printf("Returning to PROM\n");
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} else if (!strcmp(cmd, "va>tte-data")) {
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unsigned long ctx, va;
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unsigned long tte = 0;
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long res = PROM_FALSE;
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ctx = args[3];
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va = args[4];
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if (ctx) {
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/*
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* Find process owning ctx, lookup mapping.
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*/
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struct task_struct *p;
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struct mm_struct *mm = NULL;
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pgd_t *pgdp;
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pud_t *pudp;
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pmd_t *pmdp;
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pte_t *ptep;
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pte_t pte;
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for_each_process(p) {
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mm = p->mm;
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if (CTX_NRBITS(mm->context) == ctx)
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break;
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}
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if (!mm ||
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CTX_NRBITS(mm->context) != ctx)
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goto done;
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pgdp = pgd_offset(mm, va);
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if (pgd_none(*pgdp))
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goto done;
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pudp = pud_offset(pgdp, va);
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if (pud_none(*pudp))
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goto done;
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pmdp = pmd_offset(pudp, va);
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if (pmd_none(*pmdp))
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goto done;
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/* Preemption implicitly disabled by virtue of
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* being called from inside OBP.
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*/
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ptep = pte_offset_map(pmdp, va);
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pte = *ptep;
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if (pte_present(pte)) {
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tte = pte_val(pte);
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res = PROM_TRUE;
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}
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pte_unmap(ptep);
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goto done;
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}
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if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
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extern unsigned long sparc64_kern_pri_context;
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/* Spitfire Errata #32 workaround */
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"flush %%g6"
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: /* No outputs */
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: "r" (sparc64_kern_pri_context),
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"r" (PRIMARY_CONTEXT),
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"i" (ASI_DMMU));
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/*
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* Locked down tlb entry.
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*/
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if (tlb_type == spitfire)
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tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
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else if (tlb_type == cheetah || tlb_type == cheetah_plus)
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tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
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res = PROM_TRUE;
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goto done;
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}
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if (va < PGDIR_SIZE) {
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/*
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* vmalloc or prom_inherited mapping.
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*/
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pgd_t *pgdp;
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pud_t *pudp;
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pmd_t *pmdp;
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pte_t *ptep;
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pte_t pte;
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int error;
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if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) {
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tte = prom_virt_to_phys(va, &error);
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if (!error)
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res = PROM_TRUE;
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goto done;
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}
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pgdp = pgd_offset_k(va);
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if (pgd_none(*pgdp))
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goto done;
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pudp = pud_offset(pgdp, va);
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if (pud_none(*pudp))
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goto done;
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pmdp = pmd_offset(pudp, va);
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if (pmd_none(*pmdp))
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goto done;
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/* Preemption implicitly disabled by virtue of
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* being called from inside OBP.
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*/
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ptep = pte_offset_kernel(pmdp, va);
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pte = *ptep;
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if (pte_present(pte)) {
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tte = pte_val(pte);
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res = PROM_TRUE;
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}
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goto done;
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}
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if (va < PAGE_OFFSET) {
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/*
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* No mappings here.
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*/
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goto done;
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}
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if (va & (1UL << 40)) {
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/*
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* I/O page.
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*/
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tte = (__pa(va) & _PAGE_PADDR) |
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_PAGE_VALID | _PAGE_SZ4MB |
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_PAGE_E | _PAGE_P | _PAGE_W;
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res = PROM_TRUE;
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goto done;
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}
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/*
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* Normal page.
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*/
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tte = (__pa(va) & _PAGE_PADDR) |
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_PAGE_VALID | _PAGE_SZ4MB |
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_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W;
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res = PROM_TRUE;
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done:
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if (res == PROM_TRUE) {
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args[2] = 3;
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args[args[1] + 3] = 0;
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args[args[1] + 4] = res;
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args[args[1] + 5] = tte;
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} else {
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args[2] = 2;
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args[args[1] + 3] = 0;
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args[args[1] + 4] = res;
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}
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} else if (!strcmp(cmd, ".soft1")) {
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unsigned long tte;
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tte = args[3];
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prom_printf("%lx:\"%s%s%s%s%s\" ",
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(tte & _PAGE_SOFT) >> 7,
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tte & _PAGE_MODIFIED ? "M" : "-",
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tte & _PAGE_ACCESSED ? "A" : "-",
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tte & _PAGE_READ ? "W" : "-",
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tte & _PAGE_WRITE ? "R" : "-",
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tte & _PAGE_PRESENT ? "P" : "-");
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args[2] = 2;
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args[args[1] + 3] = 0;
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args[args[1] + 4] = PROM_TRUE;
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} else if (!strcmp(cmd, ".soft2")) {
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unsigned long tte;
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tte = args[3];
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prom_printf("%lx ", (tte & 0x07FC000000000000UL) >> 50);
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args[2] = 2;
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args[args[1] + 3] = 0;
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args[args[1] + 4] = PROM_TRUE;
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} else {
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prom_printf("unknown PROM `%s' command...\n", cmd);
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}
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unregister_console(&prom_console);
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while (saved_console) {
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cons = saved_console;
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saved_console = cons->next;
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register_console(cons);
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}
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spin_lock(&prom_entry_lock);
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local_irq_restore(flags);
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/*
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* Restore in-interrupt status for a resume from obp.
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*/
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irq_enter();
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return 0;
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}
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unsigned int boot_flags = 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 = 0;
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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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/* XXX Implement this at some point... */
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void kernel_enter_debugger(void)
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{
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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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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 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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prom_printf ("Using /dev/tty%c as console.\n", c);
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}
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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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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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static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
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void register_prom_callbacks(void)
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{
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prom_setcallback(prom_callback);
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prom_feval(": linux-va>tte-data 2 \" va>tte-data\" $callback drop ; "
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"' linux-va>tte-data to va>tte-data");
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prom_feval(": linux-.soft1 1 \" .soft1\" $callback 2drop ; "
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"' linux-.soft1 to .soft1");
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prom_feval(": linux-.soft2 1 \" .soft2\" $callback 2drop ; "
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"' linux-.soft2 to .soft2");
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}
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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(saved_command_line, *cmdline_p);
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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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#elif defined(CONFIG_PROM_CONSOLE)
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conswitchp = &prom_con;
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#endif
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/* Work out if we are starfire early on */
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check_if_starfire();
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boot_flags_init(*cmdline_p);
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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_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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init_task.thread_info->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;
|
|
#if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
|
|
ic_proto_enabled = 0;
|
|
#endif
|
|
}
|
|
}
|
|
#endif
|
|
|
|
paging_init();
|
|
}
|
|
|
|
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 {
|
|
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);
|