/* * 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. */ #undef DEBUG #include <linux/module.h> #include <linux/string.h> #include <linux/sched.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/reboot.h> #include <linux/delay.h> #include <linux/initrd.h> #include <linux/platform_device.h> #include <linux/seq_file.h> #include <linux/ioport.h> #include <linux/console.h> #include <linux/utsname.h> #include <linux/screen_info.h> #include <linux/root_dev.h> #include <linux/notifier.h> #include <linux/cpu.h> #include <linux/unistd.h> #include <linux/serial.h> #include <linux/serial_8250.h> #include <linux/debugfs.h> #include <linux/percpu.h> #include <asm/io.h> #include <asm/prom.h> #include <asm/processor.h> #include <asm/vdso_datapage.h> #include <asm/pgtable.h> #include <asm/smp.h> #include <asm/elf.h> #include <asm/machdep.h> #include <asm/time.h> #include <asm/cputable.h> #include <asm/sections.h> #include <asm/firmware.h> #include <asm/btext.h> #include <asm/nvram.h> #include <asm/setup.h> #include <asm/system.h> #include <asm/rtas.h> #include <asm/iommu.h> #include <asm/serial.h> #include <asm/cache.h> #include <asm/page.h> #include <asm/mmu.h> #include <asm/lmb.h> #include <asm/xmon.h> #include <asm/cputhreads.h> #include "setup.h" #ifdef DEBUG #include <asm/udbg.h> #define DBG(fmt...) udbg_printf(fmt) #else #define DBG(fmt...) #endif /* The main machine-dep calls structure */ struct machdep_calls ppc_md; EXPORT_SYMBOL(ppc_md); struct machdep_calls *machine_id; EXPORT_SYMBOL(machine_id); unsigned long klimit = (unsigned long) _end; char cmd_line[COMMAND_LINE_SIZE]; /* * 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_each_online_cpu(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.name) seq_printf(m, "platform\t: %s\n", ppc_md.name); 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 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", initrd_start, initrd_end); /* 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 int threads_per_core, threads_shift; cpumask_t threads_core_mask; static void __init cpu_init_thread_core_maps(int tpc) { int i; threads_per_core = tpc; threads_core_mask = CPU_MASK_NONE; /* This implementation only supports power of 2 number of threads * for simplicity and performance */ threads_shift = ilog2(tpc); BUG_ON(tpc != (1 << threads_shift)); for (i = 0; i < tpc; i++) cpu_set(i, threads_core_mask); printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", tpc, tpc > 1 ? "s" : ""); printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); } /** * 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. * * NOTE: This must match the parsing done in early_init_dt_scan_cpus. */ void __init smp_setup_cpu_maps(void) { struct device_node *dn = NULL; int cpu = 0; int nthreads = 1; DBG("smp_setup_cpu_maps()\n"); while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { const int *intserv; int j, len; DBG(" * %s...\n", dn->full_name); intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); if (intserv) { nthreads = len / sizeof(int); DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", nthreads); } else { DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); intserv = of_get_property(dn, "reg", NULL); if (!intserv) intserv = &cpu; /* assume logical == phys */ } for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { DBG(" thread %d -> cpu %d (hard id %d)\n", j, cpu, intserv[j]); cpu_set(cpu, cpu_present_map); set_hard_smp_processor_id(cpu, intserv[j]); cpu_set(cpu, cpu_possible_map); cpu++; } } /* If no SMT supported, nthreads is forced to 1 */ if (!cpu_has_feature(CPU_FTR_SMT)) { DBG(" SMT disabled ! nthreads forced to 1\n"); nthreads = 1; } #ifdef CONFIG_PPC64 /* * On pSeries LPAR, we need to know how many cpus * could possibly be added to this partition. */ if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && (dn = of_find_node_by_path("/rtas"))) { int num_addr_cell, num_size_cell, maxcpus; const unsigned int *ireg; num_addr_cell = of_n_addr_cells(dn); num_size_cell = of_n_size_cells(dn); ireg = of_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 *= nthreads; 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); } vdso_data->processorCount = num_present_cpus(); #endif /* CONFIG_PPC64 */ /* Initialize CPU <=> thread mapping/ * * WARNING: We assume that the number of threads is the same for * every CPU in the system. If that is not the case, then some code * here will have to be reworked */ cpu_init_thread_core_maps(nthreads); } /* * Being that cpu_sibling_map is now a per_cpu array, then it cannot * be initialized until the per_cpu areas have been created. This * function is now called from setup_per_cpu_areas(). */ void __init smp_setup_cpu_sibling_map(void) { #ifdef CONFIG_PPC64 int i, cpu, base; for_each_possible_cpu(cpu) { DBG("Sibling map for CPU %d:", cpu); base = cpu_first_thread_in_core(cpu); for (i = 0; i < threads_per_core; i++) { cpu_set(base + i, per_cpu(cpu_sibling_map, cpu)); DBG(" %d", base + i); } DBG("\n"); } #endif /* CONFIG_PPC64 */ } #endif /* CONFIG_SMP */ static __init int add_pcspkr(void) { struct device_node *np; struct platform_device *pd; int ret; np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); of_node_put(np); if (!np) return -ENODEV; pd = platform_device_alloc("pcspkr", -1); if (!pd) return -ENOMEM; ret = platform_device_add(pd); if (ret) platform_device_put(pd); return ret; } device_initcall(add_pcspkr); void probe_machine(void) { extern struct machdep_calls __machine_desc_start; extern struct machdep_calls __machine_desc_end; /* * Iterate all ppc_md structures until we find the proper * one for the current machine type */ DBG("Probing machine type ...\n"); for (machine_id = &__machine_desc_start; machine_id < &__machine_desc_end; machine_id++) { DBG(" %s ...", machine_id->name); memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); if (ppc_md.probe()) { DBG(" match !\n"); break; } DBG("\n"); } /* What can we do if we didn't find ? */ if (machine_id >= &__machine_desc_end) { DBG("No suitable machine found !\n"); for (;;); } printk(KERN_INFO "Using %s machine description\n", ppc_md.name); } /* Match a class of boards, not a specific device configuration. */ int check_legacy_ioport(unsigned long base_port) { struct device_node *parent, *np = NULL; int ret = -ENODEV; switch(base_port) { case I8042_DATA_REG: if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); if (np) { parent = of_get_parent(np); of_node_put(np); np = parent; break; } np = of_find_node_by_type(NULL, "8042"); /* Pegasos has no device_type on its 8042 node, look for the * name instead */ if (!np) np = of_find_node_by_name(NULL, "8042"); break; case FDC_BASE: /* FDC1 */ np = of_find_node_by_type(NULL, "fdc"); break; #ifdef CONFIG_PPC_PREP case _PIDXR: case _PNPWRP: case PNPBIOS_BASE: /* implement me */ #endif default: /* ipmi is supposed to fail here */ break; } if (!np) return ret; parent = of_get_parent(np); if (parent) { if (strcmp(parent->type, "isa") == 0) ret = 0; of_node_put(parent); } of_node_put(np); return ret; } EXPORT_SYMBOL(check_legacy_ioport); static int ppc_panic_event(struct notifier_block *this, unsigned long event, void *ptr) { ppc_md.panic(ptr); /* May not return */ return NOTIFY_DONE; } static struct notifier_block ppc_panic_block = { .notifier_call = ppc_panic_event, .priority = INT_MIN /* may not return; must be done last */ }; void __init setup_panic(void) { atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); } #ifdef CONFIG_CHECK_CACHE_COHERENCY /* * For platforms that have configurable cache-coherency. This function * checks that the cache coherency setting of the kernel matches the setting * left by the firmware, as indicated in the device tree. Since a mismatch * will eventually result in DMA failures, we print * and error and call * BUG() in that case. */ #ifdef CONFIG_NOT_COHERENT_CACHE #define KERNEL_COHERENCY 0 #else #define KERNEL_COHERENCY 1 #endif static int __init check_cache_coherency(void) { struct device_node *np; const void *prop; int devtree_coherency; np = of_find_node_by_path("/"); prop = of_get_property(np, "coherency-off", NULL); of_node_put(np); devtree_coherency = prop ? 0 : 1; if (devtree_coherency != KERNEL_COHERENCY) { printk(KERN_ERR "kernel coherency:%s != device tree_coherency:%s\n", KERNEL_COHERENCY ? "on" : "off", devtree_coherency ? "on" : "off"); BUG(); } return 0; } late_initcall(check_cache_coherency); #endif /* CONFIG_CHECK_CACHE_COHERENCY */ #ifdef CONFIG_DEBUG_FS struct dentry *powerpc_debugfs_root; static int powerpc_debugfs_init(void) { powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); return powerpc_debugfs_root == NULL; } arch_initcall(powerpc_debugfs_init); #endif