setup.c
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上传日期:2013-04-10
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- /* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
- * linux/arch/sparc/kernel/setup.c
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
- */
- #include <linux/errno.h>
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/mm.h>
- #include <linux/stddef.h>
- #include <linux/unistd.h>
- #include <linux/ptrace.h>
- #include <linux/slab.h>
- #include <asm/smp.h>
- #include <linux/user.h>
- #include <linux/a.out.h>
- #include <linux/tty.h>
- #include <linux/delay.h>
- #include <linux/config.h>
- #include <linux/fs.h>
- #include <linux/seq_file.h>
- #include <linux/kdev_t.h>
- #include <linux/major.h>
- #include <linux/string.h>
- #include <linux/blk.h>
- #include <linux/init.h>
- #include <linux/interrupt.h>
- #include <linux/console.h>
- #include <linux/spinlock.h>
- #include <asm/segment.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/kgdb.h>
- #include <asm/processor.h>
- #include <asm/oplib.h>
- #include <asm/page.h>
- #include <asm/pgtable.h>
- #include <asm/traps.h>
- #include <asm/vaddrs.h>
- #include <asm/kdebug.h>
- #include <asm/mbus.h>
- #include <asm/idprom.h>
- #include <asm/softirq.h>
- #include <asm/hardirq.h>
- #include <asm/machines.h>
- struct screen_info screen_info = {
- 0, 0, /* orig-x, orig-y */
- 0, /* unused */
- 0, /* orig-video-page */
- 0, /* orig-video-mode */
- 128, /* orig-video-cols */
- 0,0,0, /* ega_ax, ega_bx, ega_cx */
- 54, /* orig-video-lines */
- 0, /* orig-video-isVGA */
- 16 /* orig-video-points */
- };
- /* Typing sync at the prom prompt calls the function pointed to by
- * romvec->pv_synchook which I set to the following function.
- * This should sync all filesystems and return, for now it just
- * prints out pretty messages and returns.
- */
- extern unsigned long trapbase;
- extern int serial_console;
- extern void breakpoint(void);
- #if CONFIG_SUN_CONSOLE
- void (*prom_palette)(int);
- #endif
- asmlinkage void sys_sync(void); /* it's really int */
- /* Pretty sick eh? */
- void prom_sync_me(void)
- {
- unsigned long prom_tbr, flags;
- /* XXX Badly broken. FIX! - Anton */
- save_and_cli(flags);
- __asm__ __volatile__("rd %%tbr, %0nt" : "=r" (prom_tbr));
- __asm__ __volatile__("wr %0, 0x0, %%tbrnt"
- "nopnt"
- "nopnt"
- "nopnt" : : "r" (&trapbase));
- #ifdef CONFIG_SUN_CONSOLE
- if (prom_palette)
- prom_palette(1);
- #endif
- prom_printf("PROM SYNC COMMAND...n");
- show_free_areas();
- if(current->pid != 0) {
- sti();
- sys_sync();
- cli();
- }
- prom_printf("Returning to promn");
- __asm__ __volatile__("wr %0, 0x0, %%tbrnt"
- "nopnt"
- "nopnt"
- "nopnt" : : "r" (prom_tbr));
- restore_flags(flags);
- return;
- }
- extern void rs_kgdb_hook(int tty_num); /* sparc/serial.c */
- unsigned int boot_flags __initdata = 0;
- #define BOOTME_DEBUG 0x1
- #define BOOTME_SINGLE 0x2
- #define BOOTME_KGDBA 0x4
- #define BOOTME_KGDBB 0x8
- #define BOOTME_KGDB 0xc
- #ifdef CONFIG_SUN_CONSOLE
- static int console_fb __initdata = 0;
- #endif
- /* Exported for mm/init.c:paging_init. */
- unsigned long cmdline_memory_size __initdata = 0;
- void kernel_enter_debugger(void)
- {
- if (boot_flags & BOOTME_KGDB) {
- printk("KGDB: Enteredn");
- breakpoint();
- }
- }
- static void
- prom_console_write(struct console *con, const char *s, unsigned n)
- {
- prom_printf("%s", s);
- }
- static struct console prom_debug_console = {
- name: "debug",
- write: prom_console_write,
- flags: CON_PRINTBUFFER,
- index: -1,
- };
- int obp_system_intr(void)
- {
- if (boot_flags & BOOTME_KGDB) {
- printk("KGDB: system interruptedn");
- breakpoint();
- return 1;
- }
- if (boot_flags & BOOTME_DEBUG) {
- printk("OBP: system interruptedn");
- prom_halt();
- return 1;
- }
- return 0;
- }
- /*
- * Process kernel command line switches that are specific to the
- * SPARC or that require special low-level processing.
- */
- static void __init process_switch(char c)
- {
- switch (c) {
- case 'd':
- boot_flags |= BOOTME_DEBUG;
- break;
- case 's':
- boot_flags |= BOOTME_SINGLE;
- break;
- case 'h':
- prom_printf("boot_flags_init: Halt!n");
- prom_halt();
- break;
- case 'p':
- /* Use PROM debug console. */
- register_console(&prom_debug_console);
- break;
- default:
- printk("Unknown boot switch (-%c)n", c);
- break;
- }
- }
- static void __init boot_flags_init(char *commands)
- {
- while (*commands) {
- /* Move to the start of the next "argument". */
- while (*commands && *commands == ' ')
- commands++;
- /* Process any command switches, otherwise skip it. */
- if (*commands == ' ')
- break;
- else if (*commands == '-') {
- commands++;
- while (*commands && *commands != ' ')
- process_switch(*commands++);
- } else if (strlen(commands) >= 9
- && !strncmp(commands, "kgdb=tty", 8)) {
- switch (commands[8]) {
- #ifdef CONFIG_SUN_SERIAL
- case 'a':
- boot_flags |= BOOTME_KGDBA;
- prom_printf("KGDB: Using serial line /dev/ttya.n");
- break;
- case 'b':
- boot_flags |= BOOTME_KGDBB;
- prom_printf("KGDB: Using serial line /dev/ttyb.n");
- break;
- #endif
- default:
- printk("KGDB: Unknown tty line.n");
- break;
- }
- commands += 9;
- } else {
- #if CONFIG_SUN_CONSOLE
- if (!strncmp(commands, "console=", 8)) {
- commands += 8;
- if (!strncmp (commands, "ttya", 4)) {
- console_fb = 2;
- prom_printf ("Using /dev/ttya as console.n");
- } else if (!strncmp (commands, "ttyb", 4)) {
- console_fb = 3;
- prom_printf ("Using /dev/ttyb as console.n");
- #if defined(CONFIG_PROM_CONSOLE)
- } else if (!strncmp (commands, "prom", 4)) {
- char *p;
-
- for (p = commands - 8; *p && *p != ' '; p++)
- *p = ' ';
- conswitchp = &prom_con;
- console_fb = 1;
- #endif
- } else {
- console_fb = 1;
- }
- } else
- #endif
- if (!strncmp(commands, "mem=", 4)) {
- /*
- * "mem=XXX[kKmM] overrides the PROM-reported
- * memory size.
- */
- cmdline_memory_size = simple_strtoul(commands + 4,
- &commands, 0);
- if (*commands == 'K' || *commands == 'k') {
- cmdline_memory_size <<= 10;
- commands++;
- } else if (*commands=='M' || *commands=='m') {
- cmdline_memory_size <<= 20;
- commands++;
- }
- }
- while (*commands && *commands != ' ')
- commands++;
- }
- }
- }
- /* This routine will in the future do all the nasty prom stuff
- * to probe for the mmu type and its parameters, etc. This will
- * also be where SMP things happen plus the Sparc specific memory
- * physical memory probe as on the alpha.
- */
- extern int prom_probe_memory(void);
- extern void sun4c_probe_vac(void);
- extern char cputypval;
- extern unsigned long start, end;
- extern void panic_setup(char *, int *);
- extern void srmmu_end_memory(unsigned long, unsigned long *);
- extern void sun_serial_setup(void);
- extern unsigned short root_flags;
- extern unsigned short root_dev;
- extern unsigned short ram_flags;
- #define RAMDISK_IMAGE_START_MASK 0x07FF
- #define RAMDISK_PROMPT_FLAG 0x8000
- #define RAMDISK_LOAD_FLAG 0x4000
- extern int root_mountflags;
- char saved_command_line[256];
- char reboot_command[256];
- enum sparc_cpu sparc_cpu_model;
- struct tt_entry *sparc_ttable;
- struct pt_regs fake_swapper_regs;
- extern void paging_init(void);
- void __init setup_arch(char **cmdline_p)
- {
- int i;
- unsigned long highest_paddr;
- sparc_ttable = (struct tt_entry *) &start;
- /* Initialize PROM console and command line. */
- *cmdline_p = prom_getbootargs();
- strcpy(saved_command_line, *cmdline_p);
- /* Set sparc_cpu_model */
- sparc_cpu_model = sun_unknown;
- if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
- if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
- if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
- if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */
- if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
- if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
- if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
- #ifdef CONFIG_SUN4
- if (sparc_cpu_model != sun4) {
- prom_printf("This kernel is for Sun4 architecture only.n");
- prom_halt();
- }
- #endif
- printk("ARCH: ");
- switch(sparc_cpu_model) {
- case sun4:
- printk("SUN4n");
- break;
- case sun4c:
- printk("SUN4Cn");
- break;
- case sun4m:
- printk("SUN4Mn");
- break;
- case sun4d:
- printk("SUN4Dn");
- break;
- case sun4e:
- printk("SUN4En");
- break;
- case sun4u:
- printk("SUN4Un");
- break;
- default:
- printk("UNKNOWN!n");
- break;
- };
- #ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
- #elif defined(CONFIG_PROM_CONSOLE)
- conswitchp = &prom_con;
- #endif
- boot_flags_init(*cmdline_p);
- idprom_init();
- if (ARCH_SUN4C_SUN4)
- sun4c_probe_vac();
- load_mmu();
- (void) prom_probe_memory();
- phys_base = 0xffffffffUL;
- highest_paddr = 0UL;
- for (i = 0; sp_banks[i].num_bytes != 0; i++) {
- unsigned long top;
- if (sp_banks[i].base_addr < phys_base)
- phys_base = sp_banks[i].base_addr;
- top = sp_banks[i].base_addr +
- sp_banks[i].num_bytes;
- if (highest_paddr < top)
- highest_paddr = top;
- }
- if (!root_flags)
- root_mountflags &= ~MS_RDONLY;
- ROOT_DEV = to_kdev_t(root_dev);
- #ifdef CONFIG_BLK_DEV_INITRD
- rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
- rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
- rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
- #endif
- prom_setsync(prom_sync_me);
- {
- #if !CONFIG_SUN_SERIAL
- serial_console = 0;
- #else
- switch (console_fb) {
- case 0: /* Let get our io devices from prom */
- {
- int idev = prom_query_input_device();
- int odev = prom_query_output_device();
- if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
- serial_console = 0;
- } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
- serial_console = 1;
- } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
- serial_console = 2;
- } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
- prom_printf("MrCoffee ttyan");
- serial_console = 1;
- } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
- serial_console = 0;
- prom_printf("MrCoffee keyboardn");
- } else {
- prom_printf("Inconsistent or unknown consolen");
- prom_printf("You cannot mix serial and non serial input/output devicesn");
- prom_halt();
- }
- }
- break;
- case 1: serial_console = 0; break; /* Force one of the framebuffers as console */
- case 2: serial_console = 1; break; /* Force ttya as console */
- case 3: serial_console = 2; break; /* Force ttyb as console */
- }
- #endif
- }
- if ((boot_flags & BOOTME_KGDBA)) {
- rs_kgdb_hook(0);
- }
- if ((boot_flags & BOOTME_KGDBB)) {
- rs_kgdb_hook(1);
- }
- if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
- ((*(short *)linux_dbvec) != -1)) {
- printk("Booted under KADB. Syncing trap table.n");
- (*(linux_dbvec->teach_debugger))();
- }
- if((boot_flags & BOOTME_KGDB)) {
- set_debug_traps();
- prom_printf ("Breakpoint!n");
- breakpoint();
- }
- init_mm.context = (unsigned long) NO_CONTEXT;
- init_task.thread.kregs = &fake_swapper_regs;
- if (serial_console)
- conswitchp = NULL;
- paging_init();
- }
- asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
- {
- return -EIO;
- }
- extern char *sparc_cpu_type[];
- extern char *sparc_fpu_type[];
- static int show_cpuinfo(struct seq_file *m, void *__unused)
- {
- int cpuid = hard_smp_processor_id();
- seq_printf(m,
- "cputt: %sn"
- "fputt: %sn"
- "promlibtt: Version %d Revision %dn"
- "promtt: %d.%dn"
- "typett: %sn"
- "ncpus probedt: %dn"
- "ncpus activet: %dn"
- #ifndef CONFIG_SMP
- "BogoMipst: %lu.%02lun"
- #endif
- ,
- sparc_cpu_type[cpuid] ? : "undetermined",
- sparc_fpu_type[cpuid] ? : "undetermined",
- romvec->pv_romvers,
- prom_rev,
- romvec->pv_printrev >> 16,
- (short) romvec->pv_printrev,
- &cputypval,
- linux_num_cpus,
- smp_num_cpus
- #ifndef CONFIG_SMP
- , loops_per_jiffy/(500000/HZ),
- (loops_per_jiffy/(5000/HZ)) % 100
- #endif
- );
- #ifdef CONFIG_SMP
- smp_bogo_info(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,
- };