/* * Common prep/pmac/chrp 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 #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 bootx_init(unsigned long r4, unsigned long phys); extern void identify_cpu(unsigned long offset, unsigned long cpu); extern void do_cpu_ftr_fixups(unsigned long offset); 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 long DMA_MODE_READ, DMA_MODE_WRITE; #ifdef CONFIG_PPC_MULTIPLATFORM int _machine = 0; extern void prep_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7); extern void pmac_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7); extern void chrp_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7); #endif /* CONFIG_PPC_MULTIPLATFORM */ #ifdef CONFIG_MAGIC_SYSRQ unsigned long SYSRQ_KEY = 0x54; #endif /* CONFIG_MAGIC_SYSRQ */ #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); } void machine_power_off(void) { #ifdef CONFIG_NVRAM nvram_sync(); #endif ppc_md.power_off(); } void machine_halt(void) { #ifdef CONFIG_NVRAM nvram_sync(); #endif ppc_md.halt(); } void (*pm_power_off)(void) = machine_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 (i = 0; i < NR_CPUS; ++i) if (cpu_online(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[i]->pvr_mask) seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name); else seq_printf(m, "unknown (%08x)", pvr); #ifdef CONFIG_ALTIVEC if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC) seq_printf(m, ", altivec supported"); #endif seq_printf(m, "\n"); #ifdef CONFIG_TAU if (cur_cpu_spec[i]->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(); /* 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. */ identify_cpu(offset, 0); do_cpu_ftr_fixups(offset); #if defined(CONFIG_PPC_MULTIPLATFORM) reloc_got2(offset); /* If we came here from BootX, clear the screen, * set up some pointers and return. */ if ((r3 == 0x426f6f58) && (r5 == 0)) bootx_init(r4, phys); /* * don't do anything on prep * for now, don't use bootinfo because it breaks yaboot 0.5 * and assume that if we didn't find a magic number, we have OF */ else if (*(unsigned long *)(0) != 0xdeadc0de) phys = prom_init(r3, r4, (prom_entry)r5); reloc_got2(-offset); #endif return phys; } #ifdef CONFIG_PPC_OF /* * Assume here that all clock rates are the same in a * smp system. -- Cort */ int __openfirmware of_show_percpuinfo(struct seq_file *m, int i) { struct device_node *cpu_node; u32 *fp; int s; cpu_node = find_type_devices("cpu"); if (!cpu_node) return 0; for (s = 0; s < i && cpu_node->next; s++) cpu_node = cpu_node->next; fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL); if (fp) seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000); return 0; } void __init intuit_machine_type(void) { char *model; struct device_node *root; /* ask the OF info if we're a chrp or pmac */ root = find_path_device("/"); if (root != 0) { /* assume pmac unless proven to be chrp -- Cort */ _machine = _MACH_Pmac; model = get_property(root, "device_type", NULL); if (model && !strncmp("chrp", model, 4)) _machine = _MACH_chrp; else { model = get_property(root, "model", NULL); if (model && !strncmp(model, "IBM", 3)) _machine = _MACH_chrp; } } } #endif #ifdef CONFIG_PPC_MULTIPLATFORM /* * The PPC_MULTIPLATFORM 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()); /* if we didn't get any bootinfo telling us what we are... */ if (_machine == 0) { /* prep boot loader tells us if we're prep or not */ if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) ) _machine = _MACH_prep; } /* not much more to do here, if prep */ if (_machine == _MACH_prep) { prep_init(r3, r4, r5, r6, r7); return; } /* prom_init has already been called from __start */ if (boot_infos) relocate_nodes(); /* If we aren't PReP, we can find out if we're Pmac * or CHRP with this. */ if (_machine == 0) intuit_machine_type(); /* finish_device_tree may need _machine defined. */ finish_device_tree(); /* * If we were booted via quik, r3 points to the physical * address of the command-line parameters. * If we were booted from an xcoff image (i.e. netbooted or * booted from floppy), we get the command line from the * bootargs property of the /chosen node. * If an initial ramdisk is present, r3 and r4 * are used for initrd_start and initrd_size, * otherwise they contain 0xdeadbeef. */ if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) { strlcpy(cmd_line, (char *)r3 + KERNELBASE, sizeof(cmd_line)); } else if (boot_infos != 0) { /* booted by BootX - check for ramdisk */ if (boot_infos->kernelParamsOffset != 0) strlcpy(cmd_line, (char *) boot_infos + boot_infos->kernelParamsOffset, sizeof(cmd_line)); #ifdef CONFIG_BLK_DEV_INITRD if (boot_infos->ramDisk) { initrd_start = (unsigned long) boot_infos + boot_infos->ramDisk; initrd_end = initrd_start + boot_infos->ramDiskSize; initrd_below_start_ok = 1; } #endif } else { struct device_node *chosen; char *p; #ifdef CONFIG_BLK_DEV_INITRD if (r3 && r4 && r4 != 0xdeadbeef) { if (r3 < KERNELBASE) r3 += KERNELBASE; initrd_start = r3; initrd_end = r3 + r4; ROOT_DEV = Root_RAM0; initrd_below_start_ok = 1; } #endif chosen = find_devices("chosen"); if (chosen != NULL) { p = get_property(chosen, "bootargs", NULL); if (p && *p) { strlcpy(cmd_line, p, sizeof(cmd_line)); } } } #ifdef CONFIG_ADB if (strstr(cmd_line, "adb_sync")) { extern int __adb_probe_sync; __adb_probe_sync = 1; } #endif /* CONFIG_ADB */ switch (_machine) { case _MACH_Pmac: pmac_init(r3, r4, r5, r6, r7); break; case _MACH_chrp: chrp_init(r3, r4, r5, r6, r7); break; } } #ifdef CONFIG_SERIAL_CORE_CONSOLE extern char *of_stdout_device; static int __init set_preferred_console(void) { struct device_node *prom_stdout; char *name; int offset = 0; if (of_stdout_device == NULL) return -ENODEV; /* The user has requested a console so this is already set up. */ if (strstr(saved_command_line, "console=")) return -EBUSY; prom_stdout = find_path_device(of_stdout_device); if (!prom_stdout) return -ENODEV; name = (char *)get_property(prom_stdout, "name", NULL); if (!name) return -ENODEV; if (strcmp(name, "serial") == 0) { int i; u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i); if (i > 8) { switch (reg[1]) { case 0x3f8: offset = 0; break; case 0x2f8: offset = 1; break; case 0x898: offset = 2; break; case 0x890: offset = 3; break; default: /* We dont recognise the serial port */ return -ENODEV; } } } else if (strcmp(name, "ch-a") == 0) offset = 0; else if (strcmp(name, "ch-b") == 0) offset = 1; else return -ENODEV; return add_preferred_console("ttyS", offset, NULL); } console_initcall(set_preferred_console); #endif /* CONFIG_SERIAL_CORE_CONSOLE */ #endif /* CONFIG_PPC_MULTIPLATFORM */ 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 */ #ifdef CONFIG_PPC_MULTIPLATFORM case BI_MACHTYPE: _machine = data[0]; break; #endif 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 #ifdef CONFIG_POWER4 ppc_md.power_save = power4_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) { extern u32 wdt_enable; if (p && strncmp(p, "0", 1) != 0) wdt_enable = 1; return 0; } early_param("wdt", early_parse_wdt); int __init early_parse_wdt_period (char *p) { extern u32 wdt_period; if (p) 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 (i = 0; i < NR_CPUS; i++) if (cpu_possible(i)) register_cpu(&cpu_devices[i], i, NULL); /* 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; #ifdef CONFIG_PPC_MULTIPLATFORM /* This could be called "early setup arch", it must be done * now because xmon need it */ if (_machine == _MACH_Pmac) pmac_feature_init(); /* New cool way */ #endif #ifdef CONFIG_XMON xmon_map_scc(); 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[0]->dcache_bsize; icache_bsize = cur_cpu_spec[0]->icache_bsize; ucache_bsize = 0; } else ucache_bsize = dcache_bsize = icache_bsize = cur_cpu_spec[0]->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(saved_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(); /* this is for modules since _machine can be a define -- Cort */ ppc_md.ppc_machine = _machine; }