setup.c
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- /* $Id: setup.c,v 1.71 2001/11/13 00:49:28 davem Exp $
- * linux/arch/sparc64/kernel/setup.c
- *
- * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
- #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/inet.h>
- #include <linux/console.h>
- #include <asm/segment.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/processor.h>
- #include <asm/oplib.h>
- #include <asm/page.h>
- #include <asm/pgtable.h>
- #include <asm/idprom.h>
- #include <asm/head.h>
- #include <asm/starfire.h>
- #include <asm/hardirq.h>
- #ifdef CONFIG_IP_PNP
- #include <net/ipconfig.h>
- #endif
- 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, /* unused, ega_bx, unused */
- 54, /* orig-video-lines */
- 0, /* orig-video-isVGA */
- 16 /* orig-video-points */
- };
- /* Typing sync at the prom prompt calls the function pointed to by
- * the sync callback which I set to the following function.
- * This should sync all filesystems and return, for now it just
- * prints out pretty messages and returns.
- */
- #if CONFIG_SUN_CONSOLE
- void (*prom_palette)(int);
- #endif
- void (*prom_keyboard)(void);
- asmlinkage void sys_sync(void); /* it's really int */
- static void
- prom_console_write(struct console *con, const char *s, unsigned n)
- {
- prom_printf("%s", s);
- }
- static struct console prom_console = {
- name: "prom",
- write: prom_console_write,
- flags: CON_CONSDEV | CON_ENABLED,
- index: -1,
- };
- #define PROM_TRUE -1
- #define PROM_FALSE 0
- /* Pretty sick eh? */
- int prom_callback(long *args)
- {
- struct console *cons, *saved_console = NULL;
- unsigned long flags;
- char *cmd;
- extern spinlock_t prom_entry_lock;
- if (!args)
- return -1;
- if (!(cmd = (char *)args[0]))
- return -1;
- /*
- * The callback can be invoked on the cpu that first dropped
- * into prom_cmdline after taking the serial interrupt, or on
- * a slave processor that was smp_captured() if the
- * administrator has done a switch-cpu inside obp. In either
- * case, the cpu is marked as in-interrupt. Drop IRQ locks.
- */
- irq_exit(smp_processor_id(), 0);
- save_and_cli(flags);
- spin_unlock(&prom_entry_lock);
- cons = console_drivers;
- while (cons) {
- unregister_console(cons);
- cons->flags &= ~(CON_PRINTBUFFER);
- cons->next = saved_console;
- saved_console = cons;
- cons = console_drivers;
- }
- register_console(&prom_console);
- if (!strcmp(cmd, "sync")) {
- prom_printf("PROM `%s' command...n", cmd);
- show_free_areas();
- if(current->pid != 0) {
- sti();
- sys_sync();
- cli();
- }
- args[2] = 0;
- args[args[1] + 3] = -1;
- prom_printf("Returning to PROMn");
- } else if (!strcmp(cmd, "va>tte-data")) {
- unsigned long ctx, va;
- unsigned long tte = 0;
- long res = PROM_FALSE;
- ctx = args[3];
- va = args[4];
- if (ctx) {
- /*
- * Find process owning ctx, lookup mapping.
- */
- struct task_struct *p;
- struct mm_struct *mm = NULL;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- for_each_task(p) {
- mm = p->mm;
- if (CTX_HWBITS(mm->context) == ctx)
- break;
- }
- if (!mm ||
- CTX_HWBITS(mm->context) != ctx)
- goto done;
- pgdp = pgd_offset(mm, va);
- if (pgd_none(*pgdp))
- goto done;
- pmdp = pmd_offset(pgdp, va);
- if (pmd_none(*pmdp))
- goto done;
- ptep = pte_offset(pmdp, va);
- if (!pte_present(*ptep))
- goto done;
- tte = pte_val(*ptep);
- res = PROM_TRUE;
- goto done;
- }
- if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "flush %%g6"
- : /* No outputs */
- : "r" (0),
- "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
- /*
- * Locked down tlb entry.
- */
- if (tlb_type == spitfire)
- tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
- else if (tlb_type == cheetah)
- tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
- res = PROM_TRUE;
- goto done;
- }
- if (va < PGDIR_SIZE) {
- /*
- * vmalloc or prom_inherited mapping.
- */
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- int error;
- if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) {
- tte = prom_virt_to_phys(va, &error);
- if (!error)
- res = PROM_TRUE;
- goto done;
- }
- pgdp = pgd_offset_k(va);
- if (pgd_none(*pgdp))
- goto done;
- pmdp = pmd_offset(pgdp, va);
- if (pmd_none(*pmdp))
- goto done;
- ptep = pte_offset(pmdp, va);
- if (!pte_present(*ptep))
- goto done;
- tte = pte_val(*ptep);
- res = PROM_TRUE;
- goto done;
- }
- if (va < PAGE_OFFSET) {
- /*
- * No mappings here.
- */
- goto done;
- }
- if (va & (1UL << 40)) {
- /*
- * I/O page.
- */
- tte = (__pa(va) & _PAGE_PADDR) |
- _PAGE_VALID | _PAGE_SZ4MB |
- _PAGE_E | _PAGE_P | _PAGE_W;
- res = PROM_TRUE;
- goto done;
- }
- /*
- * Normal page.
- */
- tte = (__pa(va) & _PAGE_PADDR) |
- _PAGE_VALID | _PAGE_SZ4MB |
- _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W;
- res = PROM_TRUE;
- done:
- if (res == PROM_TRUE) {
- args[2] = 3;
- args[args[1] + 3] = 0;
- args[args[1] + 4] = res;
- args[args[1] + 5] = tte;
- } else {
- args[2] = 2;
- args[args[1] + 3] = 0;
- args[args[1] + 4] = res;
- }
- } else if (!strcmp(cmd, ".soft1")) {
- unsigned long tte;
- tte = args[3];
- prom_printf("%lx:"%s%s%s%s%s" ",
- (tte & _PAGE_SOFT) >> 7,
- tte & _PAGE_MODIFIED ? "M" : "-",
- tte & _PAGE_ACCESSED ? "A" : "-",
- tte & _PAGE_READ ? "W" : "-",
- tte & _PAGE_WRITE ? "R" : "-",
- tte & _PAGE_PRESENT ? "P" : "-");
- args[2] = 2;
- args[args[1] + 3] = 0;
- args[args[1] + 4] = PROM_TRUE;
- } else if (!strcmp(cmd, ".soft2")) {
- unsigned long tte;
- tte = args[3];
- prom_printf("%lx ", (tte & 0x07FC000000000000) >> 50);
- args[2] = 2;
- args[args[1] + 3] = 0;
- args[args[1] + 4] = PROM_TRUE;
- } else {
- prom_printf("unknown PROM `%s' command...n", cmd);
- }
- unregister_console(&prom_console);
- while (saved_console) {
- cons = saved_console;
- saved_console = cons->next;
- register_console(cons);
- }
- spin_lock(&prom_entry_lock);
- restore_flags(flags);
- /*
- * Restore in-interrupt status for a resume from obp.
- */
- irq_enter(smp_processor_id(), 0);
- return 0;
- }
- extern void rs_kgdb_hook(int tty_num); /* sparc/serial.c */
- unsigned int boot_flags = 0;
- #define BOOTME_DEBUG 0x1
- #define BOOTME_SINGLE 0x2
- #define BOOTME_KGDB 0x4
- #ifdef CONFIG_SUN_CONSOLE
- static int console_fb __initdata = 0;
- #endif
- /* Exported for mm/init.c:paging_init. */
- unsigned long cmdline_memory_size = 0;
- static struct console prom_debug_console = {
- name: "debug",
- write: prom_console_write,
- flags: CON_PRINTBUFFER,
- index: -1,
- };
- /* XXX Implement this at some point... */
- void kernel_enter_debugger(void)
- {
- }
- int obp_system_intr(void)
- {
- 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)) {
- boot_flags |= BOOTME_KGDB;
- switch (commands[8]) {
- #ifdef CONFIG_SUN_SERIAL
- case 'a':
- rs_kgdb_hook(0);
- prom_printf("KGDB: Using serial line /dev/ttya.n");
- break;
- case 'b':
- rs_kgdb_hook(1);
- prom_printf("KGDB: Using serial line /dev/ttyb.n");
- break;
- #endif
- default:
- printk("KGDB: Unknown tty line.n");
- boot_flags &= ~BOOTME_KGDB;
- 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++;
- }
- }
- }
- extern int prom_probe_memory(void);
- extern unsigned long start, end;
- extern void panic_setup(char *, int *);
- 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];
- extern unsigned long phys_base;
- static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
- void register_prom_callbacks(void)
- {
- prom_setcallback(prom_callback);
- prom_feval(": linux-va>tte-data 2 " va>tte-data" $callback drop ; "
- "' linux-va>tte-data to va>tte-data");
- prom_feval(": linux-.soft1 1 " .soft1" $callback 2drop ; "
- "' linux-.soft1 to .soft1");
- prom_feval(": linux-.soft2 1 " .soft2" $callback 2drop ; "
- "' linux-.soft2 to .soft2");
- }
- extern void paging_init(void);
- void __init setup_arch(char **cmdline_p)
- {
- extern int serial_console; /* in console.c, of course */
- unsigned long highest_paddr;
- int i;
- /* Initialize PROM console and command line. */
- *cmdline_p = prom_getbootargs();
- strcpy(saved_command_line, *cmdline_p);
- printk("ARCH: SUN4Un");
- #ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
- #elif defined(CONFIG_PROM_CONSOLE)
- conswitchp = &prom_con;
- #endif
- #ifdef CONFIG_SMP
- i = (unsigned long)&irq_stat[1] - (unsigned long)&irq_stat[0];
- if ((i == SMP_CACHE_BYTES) || (i == (2 * SMP_CACHE_BYTES))) {
- extern unsigned int irqsz_patchme[1];
- irqsz_patchme[0] |= ((i == SMP_CACHE_BYTES) ? SMP_CACHE_BYTES_SHIFT :
- SMP_CACHE_BYTES_SHIFT + 1);
- flushi((long)&irqsz_patchme[1]);
- } else {
- prom_printf("Unexpected size of irq_stat[] elementsn");
- prom_halt();
- }
- #endif
- /* Work out if we are starfire early on */
- check_if_starfire();
- boot_flags_init(*cmdline_p);
- idprom_init();
- (void) prom_probe_memory();
- /* In paging_init() we tip off this value to see if we need
- * to change init_mm.pgd to point to the real alias mapping.
- */
- phys_base = 0xffffffffffffffffUL;
- 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_RAM
- 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
- init_task.thread.kregs = &fake_swapper_regs;
- #ifdef CONFIG_IP_PNP
- if (!ic_set_manually) {
- int chosen = prom_finddevice ("/chosen");
- u32 cl, sv, gw;
-
- cl = prom_getintdefault (chosen, "client-ip", 0);
- sv = prom_getintdefault (chosen, "server-ip", 0);
- gw = prom_getintdefault (chosen, "gateway-ip", 0);
- if (cl && sv) {
- ic_myaddr = cl;
- ic_servaddr = sv;
- if (gw)
- ic_gateway = gw;
- #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
- ic_proto_enabled = 0;
- #endif
- }
- }
- #endif
- #ifdef CONFIG_SUN_SERIAL
- switch (console_fb) {
- case 0: /* Let's 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 {
- prom_printf("Inconsistent console: "
- "input %d, output %dn",
- idev, odev);
- prom_halt();
- }
- }
- break;
- case 1: /* Force one of the framebuffers as console */
- serial_console = 0;
- break;
- case 2: /* Force ttya as console */
- serial_console = 1;
- break;
- case 3: /* Force ttyb as console */
- serial_console = 2;
- break;
- }
- #else
- serial_console = 0;
- #endif
- if (serial_console)
- conswitchp = NULL;
- paging_init();
- }
- asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
- {
- return -EIO;
- }
- /* 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 *);
- #ifndef CONFIG_SMP
- unsigned long up_clock_tick;
- #endif
- static int show_cpuinfo(struct seq_file *m, void *__unused)
- {
- int cpuid = smp_processor_id();
- seq_printf(m,
- "cputt: %sn"
- "fputt: %sn"
- "promlibtt: Version 3 Revision %dn"
- "promtt: %d.%d.%dn"
- "typett: sun4un"
- "ncpus probedt: %dn"
- "ncpus activet: %dn"
- #ifndef CONFIG_SMP
- "Cpu0Bogot: %lu.%02lun"
- "Cpu0ClkTckt: %016lxn"
- #endif
- ,
- sparc_cpu_type[cpuid],
- sparc_fpu_type[cpuid],
- prom_rev,
- prom_prev >> 16,
- (prom_prev >> 8) & 0xff,
- prom_prev & 0xff,
- linux_num_cpus,
- smp_num_cpus
- #ifndef CONFIG_SMP
- , loops_per_jiffy/(500000/HZ),
- (loops_per_jiffy/(5000/HZ)) % 100,
- up_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,
- };