forked from luck/tmp_suning_uos_patched
c73fcc846c
The current scheme works on static interpretation of text names, which
is wrong.
The output-device setting, for example, must be resolved via an alias
or similar to a full path name to the console device.
Paths also contain an optional set of 'options', which starts with a
colon at the end of the path. The option area is used to specify
which of two serial ports ('a' or 'b') the path refers to when a
device node drives multiple ports. 'a' is assumed if the option
specification is missing.
This was caught by the UltraSPARC-T1 simulator. The 'output-device'
property was set to 'ttya' and we didn't pick upon the fact that this
is an OBP alias set to '/virtual-devices/console'. Instead we saw it
as the first serial console device, instead of the hypervisor console.
The infrastructure is now there to take advantage of this to resolve
the console correctly even in multi-head situations in fbcon too.
Thanks to Greg Onufer for the bug report.
Signed-off-by: David S. Miller <davem@davemloft.net>
445 lines
9.4 KiB
C
445 lines
9.4 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/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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/* 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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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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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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unsigned int boot_flags = 0;
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#define BOOTME_DEBUG 0x1
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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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/*
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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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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 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 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 __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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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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#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 (!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 char *sparc_cpu_type;
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extern char *sparc_fpu_type;
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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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"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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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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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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int stop_a_enabled = 1;
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