/* * Common boot and setup code for both 32-bit and 64-bit. * Extracted from arch/powerpc/kernel/setup_64.c. * * Copyright (C) 2001 PPC64 Team, IBM Corp * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #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 #include #include #include #include #include #include #include #include "setup.h" #undef DEBUG #ifdef DEBUG #include #define DBG(fmt...) udbg_printf(fmt) #else #define DBG(fmt...) #endif #ifdef CONFIG_PPC_MULTIPLATFORM int _machine = 0; EXPORT_SYMBOL(_machine); #endif unsigned long klimit = (unsigned long) _end; /* * This still seems to be needed... -- paulus */ struct screen_info screen_info = { .orig_x = 0, .orig_y = 25, .orig_video_cols = 80, .orig_video_lines = 25, .orig_video_isVGA = 1, .orig_video_points = 16 }; #ifdef __DO_IRQ_CANON /* XXX should go elsewhere eventually */ int ppc_do_canonicalize_irqs; EXPORT_SYMBOL(ppc_do_canonicalize_irqs); #endif /* also used by kexec */ void machine_shutdown(void) { if (ppc_md.machine_shutdown) ppc_md.machine_shutdown(); } void machine_restart(char *cmd) { machine_shutdown(); if (ppc_md.restart) ppc_md.restart(cmd); #ifdef CONFIG_SMP smp_send_stop(); #endif printk(KERN_EMERG "System Halted, OK to turn off power\n"); local_irq_disable(); while (1) ; } void machine_power_off(void) { machine_shutdown(); if (ppc_md.power_off) ppc_md.power_off(); #ifdef CONFIG_SMP smp_send_stop(); #endif printk(KERN_EMERG "System Halted, OK to turn off power\n"); local_irq_disable(); while (1) ; } /* Used by the G5 thermal driver */ EXPORT_SYMBOL_GPL(machine_power_off); void (*pm_power_off)(void) = machine_power_off; EXPORT_SYMBOL_GPL(pm_power_off); void machine_halt(void) { machine_shutdown(); if (ppc_md.halt) ppc_md.halt(); #ifdef CONFIG_SMP smp_send_stop(); #endif printk(KERN_EMERG "System Halted, OK to turn off power\n"); local_irq_disable(); while (1) ; } #ifdef CONFIG_TAU extern u32 cpu_temp(unsigned long cpu); extern u32 cpu_temp_both(unsigned long cpu); #endif /* CONFIG_TAU */ #ifdef CONFIG_SMP DEFINE_PER_CPU(unsigned int, pvr); #endif static int show_cpuinfo(struct seq_file *m, void *v) { unsigned long cpu_id = (unsigned long)v - 1; unsigned int pvr; unsigned short maj; unsigned short min; if (cpu_id == NR_CPUS) { #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) unsigned long bogosum = 0; int i; for (i = 0; i < NR_CPUS; ++i) if (cpu_online(i)) bogosum += loops_per_jiffy; seq_printf(m, "total bogomips\t: %lu.%02lu\n", bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); #endif /* CONFIG_SMP && CONFIG_PPC32 */ seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); if (ppc_md.show_cpuinfo != NULL) ppc_md.show_cpuinfo(m); return 0; } /* We only show online cpus: disable preempt (overzealous, I * knew) to prevent cpu going down. */ preempt_disable(); if (!cpu_online(cpu_id)) { preempt_enable(); return 0; } #ifdef CONFIG_SMP pvr = per_cpu(pvr, cpu_id); #else pvr = mfspr(SPRN_PVR); #endif maj = (pvr >> 8) & 0xFF; min = pvr & 0xFF; seq_printf(m, "processor\t: %lu\n", cpu_id); 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 (cpu_has_feature(CPU_FTR_ALTIVEC)) seq_printf(m, ", altivec supported"); #endif /* CONFIG_ALTIVEC */ 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(cpu_id)); #else /* show the actual temp sensor range */ u32 temp; temp = cpu_temp_both(cpu_id); seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", temp & 0xff, temp >> 16); #endif } #endif /* CONFIG_TAU */ /* * Assume here that all clock rates are the same in a * smp system. -- Cort */ if (ppc_proc_freq) seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); if (ppc_md.show_percpuinfo != NULL) ppc_md.show_percpuinfo(m, cpu_id); /* 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) { 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)); #ifdef CONFIG_PPC32 seq_printf(m, "bogomips\t: %lu.%02lu\n", loops_per_jiffy / (500000/HZ), (loops_per_jiffy / (5000/HZ)) % 100); #endif #ifdef CONFIG_SMP seq_printf(m, "\n"); #endif preempt_enable(); return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { unsigned long 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, }; void __init check_for_initrd(void) { #ifdef CONFIG_BLK_DEV_INITRD unsigned long *prop; DBG(" -> check_for_initrd()\n"); if (of_chosen) { prop = (unsigned long *)get_property(of_chosen, "linux,initrd-start", NULL); if (prop != NULL) { initrd_start = (unsigned long)__va(*prop); prop = (unsigned long *)get_property(of_chosen, "linux,initrd-end", NULL); if (prop != NULL) { initrd_end = (unsigned long)__va(*prop); initrd_below_start_ok = 1; } else initrd_start = 0; } } /* If we were passed an initrd, set the ROOT_DEV properly if the values * look sensible. If not, clear initrd reference. */ if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && initrd_end > initrd_start) ROOT_DEV = Root_RAM0; else initrd_start = initrd_end = 0; if (initrd_start) printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); DBG(" <- check_for_initrd()\n"); #endif /* CONFIG_BLK_DEV_INITRD */ } #ifdef CONFIG_SMP /** * setup_cpu_maps - initialize the following cpu maps: * cpu_possible_map * cpu_present_map * cpu_sibling_map * * Having the possible map set up early allows us to restrict allocations * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. * * We do not initialize the online map here; cpus set their own bits in * cpu_online_map as they come up. * * This function is valid only for Open Firmware systems. finish_device_tree * must be called before using this. * * While we're here, we may as well set the "physical" cpu ids in the paca. */ void __init smp_setup_cpu_maps(void) { struct device_node *dn = NULL; int cpu = 0; int swap_cpuid = 0; while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { int *intserv; int j, len = sizeof(u32), nthreads = 1; intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s", &len); if (intserv) nthreads = len / sizeof(int); else { intserv = (int *) get_property(dn, "reg", NULL); if (!intserv) intserv = &cpu; /* assume logical == phys */ } for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { cpu_set(cpu, cpu_present_map); set_hard_smp_processor_id(cpu, intserv[j]); if (intserv[j] == boot_cpuid_phys) swap_cpuid = cpu; cpu_set(cpu, cpu_possible_map); cpu++; } } /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that * boot cpu is logical 0. */ if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { u32 tmp; tmp = get_hard_smp_processor_id(0); set_hard_smp_processor_id(0, boot_cpuid_phys); set_hard_smp_processor_id(swap_cpuid, tmp); } #ifdef CONFIG_PPC64 /* * On pSeries LPAR, we need to know how many cpus * could possibly be added to this partition. */ if (_machine == PLATFORM_PSERIES_LPAR && (dn = of_find_node_by_path("/rtas"))) { int num_addr_cell, num_size_cell, maxcpus; unsigned int *ireg; num_addr_cell = prom_n_addr_cells(dn); num_size_cell = prom_n_size_cells(dn); ireg = (unsigned int *) get_property(dn, "ibm,lrdr-capacity", NULL); if (!ireg) goto out; maxcpus = ireg[num_addr_cell + num_size_cell]; /* Double maxcpus for processors which have SMT capability */ if (cpu_has_feature(CPU_FTR_SMT)) maxcpus *= 2; if (maxcpus > NR_CPUS) { printk(KERN_WARNING "Partition configured for %d cpus, " "operating system maximum is %d.\n", maxcpus, NR_CPUS); maxcpus = NR_CPUS; } else printk(KERN_INFO "Partition configured for %d cpus.\n", maxcpus); for (cpu = 0; cpu < maxcpus; cpu++) cpu_set(cpu, cpu_possible_map); out: of_node_put(dn); } /* * Do the sibling map; assume only two threads per processor. */ for_each_cpu(cpu) { cpu_set(cpu, cpu_sibling_map[cpu]); if (cpu_has_feature(CPU_FTR_SMT)) cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); } vdso_data->processorCount = num_present_cpus(); #endif /* CONFIG_PPC64 */ } #endif /* CONFIG_SMP */ #ifdef CONFIG_XMON static int __init early_xmon(char *p) { /* ensure xmon is enabled */ if (p) { if (strncmp(p, "on", 2) == 0) xmon_init(1); if (strncmp(p, "off", 3) == 0) xmon_init(0); if (strncmp(p, "early", 5) != 0) return 0; } xmon_init(1); debugger(NULL); return 0; } early_param("xmon", early_xmon); #endif