/* * Common prep boot and setup code. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define USES_PPC_SYS (defined(CONFIG_85xx) || defined(CONFIG_83xx) || \ defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \ defined(CONFIG_PPC_MPC52xx)) #if USES_PPC_SYS #include #endif #if defined CONFIG_KGDB #include #endif extern void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7); extern void reloc_got2(unsigned long offset); extern void ppc6xx_idle(void); extern void power4_idle(void); extern boot_infos_t *boot_infos; struct ide_machdep_calls ppc_ide_md; /* Used with the BI_MEMSIZE bootinfo parameter to store the memory size value reported by the boot loader. */ unsigned long boot_mem_size; unsigned long ISA_DMA_THRESHOLD; unsigned int DMA_MODE_READ; unsigned int DMA_MODE_WRITE; #ifdef CONFIG_PPC_PREP extern void prep_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7); dev_t boot_dev; #endif /* CONFIG_PPC_PREP */ int have_of; EXPORT_SYMBOL(have_of); #ifdef __DO_IRQ_CANON int ppc_do_canonicalize_irqs; EXPORT_SYMBOL(ppc_do_canonicalize_irqs); #endif #ifdef CONFIG_VGA_CONSOLE unsigned long vgacon_remap_base; #endif struct machdep_calls ppc_md; /* * These are used in binfmt_elf.c to put aux entries on the stack * for each elf executable being started. */ int dcache_bsize; int icache_bsize; int ucache_bsize; #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \ defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA) struct screen_info screen_info = { 0, 25, /* orig-x, orig-y */ 0, /* unused */ 0, /* orig-video-page */ 0, /* orig-video-mode */ 80, /* orig-video-cols */ 0,0,0, /* ega_ax, ega_bx, ega_cx */ 25, /* orig-video-lines */ 1, /* orig-video-isVGA */ 16 /* orig-video-points */ }; #endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */ void machine_restart(char *cmd) { #ifdef CONFIG_NVRAM nvram_sync(); #endif ppc_md.restart(cmd); } static void ppc_generic_power_off(void) { ppc_md.power_off(); } void machine_halt(void) { #ifdef CONFIG_NVRAM nvram_sync(); #endif ppc_md.halt(); } void (*pm_power_off)(void) = ppc_generic_power_off; void machine_power_off(void) { #ifdef CONFIG_NVRAM nvram_sync(); #endif if (pm_power_off) pm_power_off(); ppc_generic_power_off(); } #ifdef CONFIG_TAU extern u32 cpu_temp(unsigned long cpu); extern u32 cpu_temp_both(unsigned long cpu); #endif /* CONFIG_TAU */ int show_cpuinfo(struct seq_file *m, void *v) { int i = (int) v - 1; int err = 0; unsigned int pvr; unsigned short maj, min; unsigned long lpj; if (i >= NR_CPUS) { /* Show summary information */ #ifdef CONFIG_SMP unsigned long bogosum = 0; for_each_online_cpu(i) bogosum += cpu_data[i].loops_per_jiffy; seq_printf(m, "total bogomips\t: %lu.%02lu\n", bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); #endif /* CONFIG_SMP */ if (ppc_md.show_cpuinfo != NULL) err = ppc_md.show_cpuinfo(m); return err; } #ifdef CONFIG_SMP if (!cpu_online(i)) return 0; pvr = cpu_data[i].pvr; lpj = cpu_data[i].loops_per_jiffy; #else pvr = mfspr(SPRN_PVR); lpj = loops_per_jiffy; #endif seq_printf(m, "processor\t: %d\n", i); seq_printf(m, "cpu\t\t: "); if (cur_cpu_spec->pvr_mask) seq_printf(m, "%s", cur_cpu_spec->cpu_name); else seq_printf(m, "unknown (%08x)", pvr); #ifdef CONFIG_ALTIVEC if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC) seq_printf(m, ", altivec supported"); #endif seq_printf(m, "\n"); #ifdef CONFIG_TAU if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { #ifdef CONFIG_TAU_AVERAGE /* more straightforward, but potentially misleading */ seq_printf(m, "temperature \t: %u C (uncalibrated)\n", cpu_temp(i)); #else /* show the actual temp sensor range */ u32 temp; temp = cpu_temp_both(i); seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", temp & 0xff, temp >> 16); #endif } #endif /* CONFIG_TAU */ if (ppc_md.show_percpuinfo != NULL) { err = ppc_md.show_percpuinfo(m, i); if (err) return err; } /* If we are a Freescale core do a simple check so * we dont have to keep adding cases in the future */ if ((PVR_VER(pvr) & 0x8000) == 0x8000) { maj = PVR_MAJ(pvr); min = PVR_MIN(pvr); } else { switch (PVR_VER(pvr)) { case 0x0020: /* 403 family */ maj = PVR_MAJ(pvr) + 1; min = PVR_MIN(pvr); break; case 0x1008: /* 740P/750P ?? */ maj = ((pvr >> 8) & 0xFF) - 1; min = pvr & 0xFF; break; default: maj = (pvr >> 8) & 0xFF; min = pvr & 0xFF; break; } } seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", maj, min, PVR_VER(pvr), PVR_REV(pvr)); seq_printf(m, "bogomips\t: %lu.%02lu\n", lpj / (500000/HZ), (lpj / (5000/HZ)) % 100); #if USES_PPC_SYS if (cur_ppc_sys_spec->ppc_sys_name) seq_printf(m, "chipset\t\t: %s\n", cur_ppc_sys_spec->ppc_sys_name); #endif #ifdef CONFIG_SMP seq_printf(m, "\n"); #endif return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { int i = *pos; return i <= NR_CPUS? (void *) (i + 1): 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, }; /* * We're called here very early in the boot. We determine the machine * type and call the appropriate low-level setup functions. * -- Cort * * Note that the kernel may be running at an address which is different * from the address that it was linked at, so we must use RELOC/PTRRELOC * to access static data (including strings). -- paulus */ __init unsigned long early_init(int r3, int r4, int r5) { unsigned long phys; unsigned long offset = reloc_offset(); struct cpu_spec *spec; /* Default */ phys = offset + KERNELBASE; /* First zero the BSS -- use memset, some arches don't have * caches on yet */ memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start); /* * Identify the CPU type and fix up code sections * that depend on which cpu we have. */ spec = identify_cpu(offset, mfspr(SPRN_PVR)); do_feature_fixups(spec->cpu_features, PTRRELOC(&__start___ftr_fixup), PTRRELOC(&__stop___ftr_fixup)); return phys; } #ifdef CONFIG_PPC_PREP /* * The PPC_PREP version of platform_init... */ void __init platform_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7) { #ifdef CONFIG_BOOTX_TEXT if (boot_text_mapped) { btext_clearscreen(); btext_welcome(); } #endif parse_bootinfo(find_bootinfo()); prep_init(r3, r4, r5, r6, r7); } #endif /* CONFIG_PPC_PREP */ struct bi_record *find_bootinfo(void) { struct bi_record *rec; rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20)); if ( rec->tag != BI_FIRST ) { /* * This 0x10000 offset is a terrible hack but it will go away when * we have the bootloader handle all the relocation and * prom calls -- Cort */ rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20)); if ( rec->tag != BI_FIRST ) return NULL; } return rec; } void parse_bootinfo(struct bi_record *rec) { if (rec == NULL || rec->tag != BI_FIRST) return; while (rec->tag != BI_LAST) { ulong *data = rec->data; switch (rec->tag) { case BI_CMD_LINE: strlcpy(cmd_line, (void *)data, sizeof(cmd_line)); break; #ifdef CONFIG_BLK_DEV_INITRD case BI_INITRD: initrd_start = data[0] + KERNELBASE; initrd_end = data[0] + data[1] + KERNELBASE; break; #endif /* CONFIG_BLK_DEV_INITRD */ case BI_MEMSIZE: boot_mem_size = data[0]; break; } rec = (struct bi_record *)((ulong)rec + rec->size); } } /* * Find out what kind of machine we're on and save any data we need * from the early boot process (devtree is copied on pmac by prom_init()). * This is called very early on the boot process, after a minimal * MMU environment has been set up but before MMU_init is called. */ void __init machine_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7) { #ifdef CONFIG_CMDLINE strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line)); #endif /* CONFIG_CMDLINE */ #ifdef CONFIG_6xx ppc_md.power_save = ppc6xx_idle; #endif platform_init(r3, r4, r5, r6, r7); if (ppc_md.progress) ppc_md.progress("id mach(): done", 0x200); } #ifdef CONFIG_BOOKE_WDT /* Checks wdt=x and wdt_period=xx command-line option */ int __init early_parse_wdt(char *p) { if (p && strncmp(p, "0", 1) != 0) booke_wdt_enabled = 1; return 0; } early_param("wdt", early_parse_wdt); int __init early_parse_wdt_period (char *p) { if (p) booke_wdt_period = simple_strtoul(p, NULL, 0); return 0; } early_param("wdt_period", early_parse_wdt_period); #endif /* CONFIG_BOOKE_WDT */ /* Checks "l2cr=xxxx" command-line option */ int __init ppc_setup_l2cr(char *str) { if (cpu_has_feature(CPU_FTR_L2CR)) { unsigned long val = simple_strtoul(str, NULL, 0); printk(KERN_INFO "l2cr set to %lx\n", val); _set_L2CR(0); /* force invalidate by disable cache */ _set_L2CR(val); /* and enable it */ } return 1; } __setup("l2cr=", ppc_setup_l2cr); #ifdef CONFIG_GENERIC_NVRAM /* Generic nvram hooks used by drivers/char/gen_nvram.c */ unsigned char nvram_read_byte(int addr) { if (ppc_md.nvram_read_val) return ppc_md.nvram_read_val(addr); return 0xff; } EXPORT_SYMBOL(nvram_read_byte); void nvram_write_byte(unsigned char val, int addr) { if (ppc_md.nvram_write_val) ppc_md.nvram_write_val(addr, val); } EXPORT_SYMBOL(nvram_write_byte); void nvram_sync(void) { if (ppc_md.nvram_sync) ppc_md.nvram_sync(); } EXPORT_SYMBOL(nvram_sync); #endif /* CONFIG_NVRAM */ static struct cpu cpu_devices[NR_CPUS]; int __init ppc_init(void) { int i; /* clear the progress line */ if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff); /* register CPU devices */ for_each_possible_cpu(i) register_cpu(&cpu_devices[i], i); /* call platform init */ if (ppc_md.init != NULL) { ppc_md.init(); } return 0; } arch_initcall(ppc_init); /* Warning, IO base is not yet inited */ void __init setup_arch(char **cmdline_p) { extern char *klimit; extern void do_init_bootmem(void); /* so udelay does something sensible, assume <= 1000 bogomips */ loops_per_jiffy = 500000000 / HZ; if (ppc_md.init_early) ppc_md.init_early(); #ifdef CONFIG_XMON xmon_init(1); if (strstr(cmd_line, "xmon")) xmon(NULL); #endif /* CONFIG_XMON */ if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab); #if defined(CONFIG_KGDB) if (ppc_md.kgdb_map_scc) ppc_md.kgdb_map_scc(); set_debug_traps(); if (strstr(cmd_line, "gdb")) { if (ppc_md.progress) ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000); printk("kgdb breakpoint activated\n"); breakpoint(); } #endif /* * Set cache line size based on type of cpu as a default. * Systems with OF can look in the properties on the cpu node(s) * for a possibly more accurate value. */ if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) { dcache_bsize = cur_cpu_spec->dcache_bsize; icache_bsize = cur_cpu_spec->icache_bsize; ucache_bsize = 0; } else ucache_bsize = dcache_bsize = icache_bsize = cur_cpu_spec->dcache_bsize; /* reboot on panic */ panic_timeout = 180; init_mm.start_code = PAGE_OFFSET; init_mm.end_code = (unsigned long) _etext; init_mm.end_data = (unsigned long) _edata; init_mm.brk = (unsigned long) klimit; /* Save unparsed command line copy for /proc/cmdline */ strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); *cmdline_p = cmd_line; parse_early_param(); /* set up the bootmem stuff with available memory */ do_init_bootmem(); if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab); #ifdef CONFIG_PPC_OCP /* Initialize OCP device list */ ocp_early_init(); if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab); #endif #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; #endif ppc_md.setup_arch(); if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); paging_init(); }