/* * 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/screen_info.h> #include <linux/delay.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 <linux/cpu.h> #include <linux/kdebug.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/mbus.h> #include <asm/idprom.h> #include <asm/machines.h> #include <asm/cpudata.h> #include <asm/setup.h> #include "kernel.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; /* Pretty sick eh? */ static 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)); 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; } static unsigned int boot_flags __initdata = 0; #define BOOTME_DEBUG 0x1 /* 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, }; /* * 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': 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 == '\0') break; if (*commands == '-') { commands++; while (*commands && *commands != ' ') process_switch(*commands++); continue; } 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. */ extern void sun4c_probe_vac(void); extern char cputypval; extern unsigned long start, end; 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; EXPORT_SYMBOL(sparc_cpu_model); struct tt_entry *sparc_ttable; struct pt_regs fake_swapper_regs; 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(boot_command_line, *cmdline_p); parse_early_param(); /* 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; if (!strncmp(&cputypval, "leon" , 4)) sparc_cpu_model = sparc_leon; 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; case sparc_leon: printk("LEON\n"); break; default: printk("UNKNOWN!\n"); break; }; #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; #endif boot_flags_init(*cmdline_p); idprom_init(); if (ARCH_SUN4C) sun4c_probe_vac(); load_mmu(); 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_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 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(); smp_setup_cpu_possible_map(); } 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 %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_fpu_type , romvec->pv_romvers, prom_rev, romvec->pv_printrev >> 16, romvec->pv_printrev & 0xffff, &cputypval, ncpus_probed, 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) { } const 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(); } EXPORT_SYMBOL(sun_do_break); int stop_a_enabled = 1; static int __init topology_init(void) { int i, ncpus, err; /* 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 = 0; while (!cpu_find_by_instance(ncpus, NULL, NULL)) ncpus++; ncpus_probed = ncpus; err = 0; for_each_online_cpu(i) { struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); if (!p) err = -ENOMEM; else register_cpu(p, i); } return err; } subsys_initcall(topology_init);