diff options
Diffstat (limited to 'arch/sparc/kernel/setup.c')
| -rw-r--r-- | arch/sparc/kernel/setup.c | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c new file mode 100644 index 000000000000..55352ed85e8a --- /dev/null +++ b/arch/sparc/kernel/setup.c @@ -0,0 +1,476 @@ +/* $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 <linux/initrd.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/syscalls.h> +#include <linux/kdev_t.h> +#include <linux/major.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/console.h> +#include <linux/spinlock.h> +#include <linux/root_dev.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/traps.h> +#include <asm/vaddrs.h> +#include <asm/kdebug.h> +#include <asm/mbus.h> +#include <asm/idprom.h> +#include <asm/machines.h> +#include <asm/cpudata.h> +#include <asm/setup.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; +void (*prom_palette)(int); + +/* Pretty sick eh? */ +void prom_sync_me(void) +{ + unsigned long prom_tbr, flags; + + /* XXX Badly broken. FIX! - Anton */ + local_irq_save(flags); + __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr)); + __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" : : "r" (&trapbase)); + + if (prom_palette) + prom_palette(1); + prom_printf("PROM SYNC COMMAND...\n"); + show_free_areas(); + if(current->pid != 0) { + local_irq_enable(); + sys_sync(); + local_irq_disable(); + } + prom_printf("Returning to prom\n"); + + __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" : : "r" (prom_tbr)); + local_irq_restore(flags); + + return; +} + +unsigned int boot_flags __initdata = 0; +#define BOOTME_DEBUG 0x1 +#define BOOTME_SINGLE 0x2 + +/* Exported for mm/init.c:paging_init. */ +unsigned long cmdline_memory_size __initdata = 0; + +static void +prom_console_write(struct console *con, const char *s, unsigned n) +{ + prom_write(s, n); +} + +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_DEBUG) { + printk("OBP: system interrupted\n"); + 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 process_console(char *commands) +{ + serial_console = 0; + commands += 8; + /* Linux-style serial */ + if (!strncmp(commands, "ttyS", 4)) + serial_console = simple_strtoul(commands + 4, NULL, 10) + 1; + else if (!strncmp(commands, "tty", 3)) { + char c = *(commands + 3); + /* Solaris-style serial */ + if (c == 'a' || c == 'b') + serial_console = c - 'a' + 1; + /* else Linux-style fbcon, not serial */ + } +#if defined(CONFIG_PROM_CONSOLE) + if (!strncmp(commands, "prom", 4)) { + char *p; + + for (p = commands - 8; *p && *p != ' '; p++) + *p = ' '; + conswitchp = &prom_con; + } +#endif +} + +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 == '\0') + break; + if (*commands == '-') { + commands++; + while (*commands && *commands != ' ') + process_switch(*commands++); + continue; + } + if (!strncmp(commands, "console=", 8)) { + process_console(commands); + } else 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 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 reboot_command[COMMAND_LINE_SIZE]; +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("SUN4\n"); + break; + case sun4c: + printk("SUN4C\n"); + break; + case sun4m: + printk("SUN4M\n"); + break; + case sun4d: + printk("SUN4D\n"); + break; + case sun4e: + printk("SUN4E\n"); + break; + case sun4u: + printk("SUN4U\n"); + 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; + } + pfn_base = phys_base >> PAGE_SHIFT; + + if (!root_flags) + root_mountflags &= ~MS_RDONLY; + ROOT_DEV = old_decode_dev(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((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && + ((*(short *)linux_dbvec) != -1)) { + printk("Booted under KADB. Syncing trap table.\n"); + (*(linux_dbvec->teach_debugger))(); + } + + init_mm.context = (unsigned long) NO_CONTEXT; + init_task.thread.kregs = &fake_swapper_regs; + + 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 if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) { + prom_printf("MrCoffee ttya\n"); + serial_console = 1; + } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) { + serial_console = 0; + prom_printf("MrCoffee keyboard\n"); + } else { + prom_printf("Confusing console (idev %d, odev %d)\n", + idev, odev); + serial_console = 1; + } + + if (serial_console) + return add_preferred_console("ttyS", serial_console - 1, NULL); + + return -ENODEV; +} +console_initcall(set_preferred_console); + +extern char *sparc_cpu_type; +extern char *sparc_fpu_type; + +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 %d Revision %d\n" + "prom\t\t: %d.%d\n" + "type\t\t: %s\n" + "ncpus probed\t: %d\n" + "ncpus active\t: %d\n" +#ifndef CONFIG_SMP + "CPU0Bogo\t: %lu.%02lu\n" + "CPU0ClkTck\t: %ld\n" +#endif + , + sparc_cpu_type ? sparc_cpu_type : "undetermined", + sparc_fpu_type ? sparc_fpu_type : "undetermined", + romvec->pv_romvers, + prom_rev, + romvec->pv_printrev >> 16, + romvec->pv_printrev & 0xffff, + &cputypval, + num_possible_cpus(), + num_online_cpus() +#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; + + printk("\n"); + flush_user_windows(); + + prom_cmdline(); +} + +int serial_console = -1; +int stop_a_enabled = 1; |