diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/kernel/setup_64.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/kernel/setup_64.c | 691 |
1 files changed, 0 insertions, 691 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/kernel/setup_64.c b/ANDROID_3.4.5/arch/powerpc/kernel/setup_64.c deleted file mode 100644 index 389bd4f0..00000000 --- a/ANDROID_3.4.5/arch/powerpc/kernel/setup_64.c +++ /dev/null @@ -1,691 +0,0 @@ -/* - * - * Common boot and setup code. - * - * 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/export.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/seq_file.h> -#include <linux/ioport.h> -#include <linux/console.h> -#include <linux/utsname.h> -#include <linux/tty.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/bootmem.h> -#include <linux/pci.h> -#include <linux/lockdep.h> -#include <linux/memblock.h> -#include <linux/hugetlb.h> - -#include <asm/io.h> -#include <asm/kdump.h> -#include <asm/prom.h> -#include <asm/processor.h> -#include <asm/pgtable.h> -#include <asm/smp.h> -#include <asm/elf.h> -#include <asm/machdep.h> -#include <asm/paca.h> -#include <asm/time.h> -#include <asm/cputable.h> -#include <asm/sections.h> -#include <asm/btext.h> -#include <asm/nvram.h> -#include <asm/setup.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/firmware.h> -#include <asm/xmon.h> -#include <asm/udbg.h> -#include <asm/kexec.h> -#include <asm/mmu_context.h> -#include <asm/code-patching.h> -#include <asm/kvm_ppc.h> -#include <asm/hugetlb.h> - -#include "setup.h" - -#ifdef DEBUG -#define DBG(fmt...) udbg_printf(fmt) -#else -#define DBG(fmt...) -#endif - -int boot_cpuid = 0; -int __initdata spinning_secondaries; -u64 ppc64_pft_size; - -/* Pick defaults since we might want to patch instructions - * before we've read this from the device tree. - */ -struct ppc64_caches ppc64_caches = { - .dline_size = 0x40, - .log_dline_size = 6, - .iline_size = 0x40, - .log_iline_size = 6 -}; -EXPORT_SYMBOL_GPL(ppc64_caches); - -/* - * 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; - -#ifdef CONFIG_SMP - -static char *smt_enabled_cmdline; - -/* Look for ibm,smt-enabled OF option */ -static void check_smt_enabled(void) -{ - struct device_node *dn; - const char *smt_option; - - /* Default to enabling all threads */ - smt_enabled_at_boot = threads_per_core; - - /* Allow the command line to overrule the OF option */ - if (smt_enabled_cmdline) { - if (!strcmp(smt_enabled_cmdline, "on")) - smt_enabled_at_boot = threads_per_core; - else if (!strcmp(smt_enabled_cmdline, "off")) - smt_enabled_at_boot = 0; - else { - long smt; - int rc; - - rc = strict_strtol(smt_enabled_cmdline, 10, &smt); - if (!rc) - smt_enabled_at_boot = - min(threads_per_core, (int)smt); - } - } else { - dn = of_find_node_by_path("/options"); - if (dn) { - smt_option = of_get_property(dn, "ibm,smt-enabled", - NULL); - - if (smt_option) { - if (!strcmp(smt_option, "on")) - smt_enabled_at_boot = threads_per_core; - else if (!strcmp(smt_option, "off")) - smt_enabled_at_boot = 0; - } - - of_node_put(dn); - } - } -} - -/* Look for smt-enabled= cmdline option */ -static int __init early_smt_enabled(char *p) -{ - smt_enabled_cmdline = p; - return 0; -} -early_param("smt-enabled", early_smt_enabled); - -#else -#define check_smt_enabled() -#endif /* CONFIG_SMP */ - -/* - * Early initialization entry point. This is called by head.S - * with MMU translation disabled. We rely on the "feature" of - * the CPU that ignores the top 2 bits of the address in real - * mode so we can access kernel globals normally provided we - * only toy with things in the RMO region. From here, we do - * some early parsing of the device-tree to setup out MEMBLOCK - * data structures, and allocate & initialize the hash table - * and segment tables so we can start running with translation - * enabled. - * - * It is this function which will call the probe() callback of - * the various platform types and copy the matching one to the - * global ppc_md structure. Your platform can eventually do - * some very early initializations from the probe() routine, but - * this is not recommended, be very careful as, for example, the - * device-tree is not accessible via normal means at this point. - */ - -void __init early_setup(unsigned long dt_ptr) -{ - /* -------- printk is _NOT_ safe to use here ! ------- */ - - /* Identify CPU type */ - identify_cpu(0, mfspr(SPRN_PVR)); - - /* Assume we're on cpu 0 for now. Don't write to the paca yet! */ - initialise_paca(&boot_paca, 0); - setup_paca(&boot_paca); - - /* Initialize lockdep early or else spinlocks will blow */ - lockdep_init(); - - /* -------- printk is now safe to use ------- */ - - /* Enable early debugging if any specified (see udbg.h) */ - udbg_early_init(); - - DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr); - - /* - * Do early initialization using the flattened device - * tree, such as retrieving the physical memory map or - * calculating/retrieving the hash table size. - */ - early_init_devtree(__va(dt_ptr)); - - /* Now we know the logical id of our boot cpu, setup the paca. */ - setup_paca(&paca[boot_cpuid]); - - /* Fix up paca fields required for the boot cpu */ - get_paca()->cpu_start = 1; - - /* Probe the machine type */ - probe_machine(); - - setup_kdump_trampoline(); - - DBG("Found, Initializing memory management...\n"); - - /* Initialize the hash table or TLB handling */ - early_init_mmu(); - - /* - * Reserve any gigantic pages requested on the command line. - * memblock needs to have been initialized by the time this is - * called since this will reserve memory. - */ - reserve_hugetlb_gpages(); - - DBG(" <- early_setup()\n"); -} - -#ifdef CONFIG_SMP -void early_setup_secondary(void) -{ - /* Mark interrupts enabled in PACA */ - get_paca()->soft_enabled = 0; - - /* Initialize the hash table or TLB handling */ - early_init_mmu_secondary(); -} - -#endif /* CONFIG_SMP */ - -#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) -void smp_release_cpus(void) -{ - unsigned long *ptr; - int i; - - DBG(" -> smp_release_cpus()\n"); - - /* All secondary cpus are spinning on a common spinloop, release them - * all now so they can start to spin on their individual paca - * spinloops. For non SMP kernels, the secondary cpus never get out - * of the common spinloop. - */ - - ptr = (unsigned long *)((unsigned long)&__secondary_hold_spinloop - - PHYSICAL_START); - *ptr = __pa(generic_secondary_smp_init); - - /* And wait a bit for them to catch up */ - for (i = 0; i < 100000; i++) { - mb(); - HMT_low(); - if (spinning_secondaries == 0) - break; - udelay(1); - } - DBG("spinning_secondaries = %d\n", spinning_secondaries); - - DBG(" <- smp_release_cpus()\n"); -} -#endif /* CONFIG_SMP || CONFIG_KEXEC */ - -/* - * Initialize some remaining members of the ppc64_caches and systemcfg - * structures - * (at least until we get rid of them completely). This is mostly some - * cache informations about the CPU that will be used by cache flush - * routines and/or provided to userland - */ -static void __init initialize_cache_info(void) -{ - struct device_node *np; - unsigned long num_cpus = 0; - - DBG(" -> initialize_cache_info()\n"); - - for_each_node_by_type(np, "cpu") { - num_cpus += 1; - - /* - * We're assuming *all* of the CPUs have the same - * d-cache and i-cache sizes... -Peter - */ - if (num_cpus == 1) { - const u32 *sizep, *lsizep; - u32 size, lsize; - - size = 0; - lsize = cur_cpu_spec->dcache_bsize; - sizep = of_get_property(np, "d-cache-size", NULL); - if (sizep != NULL) - size = *sizep; - lsizep = of_get_property(np, "d-cache-block-size", - NULL); - /* fallback if block size missing */ - if (lsizep == NULL) - lsizep = of_get_property(np, - "d-cache-line-size", - NULL); - if (lsizep != NULL) - lsize = *lsizep; - if (sizep == 0 || lsizep == 0) - DBG("Argh, can't find dcache properties ! " - "sizep: %p, lsizep: %p\n", sizep, lsizep); - - ppc64_caches.dsize = size; - ppc64_caches.dline_size = lsize; - ppc64_caches.log_dline_size = __ilog2(lsize); - ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; - - size = 0; - lsize = cur_cpu_spec->icache_bsize; - sizep = of_get_property(np, "i-cache-size", NULL); - if (sizep != NULL) - size = *sizep; - lsizep = of_get_property(np, "i-cache-block-size", - NULL); - if (lsizep == NULL) - lsizep = of_get_property(np, - "i-cache-line-size", - NULL); - if (lsizep != NULL) - lsize = *lsizep; - if (sizep == 0 || lsizep == 0) - DBG("Argh, can't find icache properties ! " - "sizep: %p, lsizep: %p\n", sizep, lsizep); - - ppc64_caches.isize = size; - ppc64_caches.iline_size = lsize; - ppc64_caches.log_iline_size = __ilog2(lsize); - ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; - } - } - - DBG(" <- initialize_cache_info()\n"); -} - - -/* - * Do some initial setup of the system. The parameters are those which - * were passed in from the bootloader. - */ -void __init setup_system(void) -{ - DBG(" -> setup_system()\n"); - - /* Apply the CPUs-specific and firmware specific fixups to kernel - * text (nop out sections not relevant to this CPU or this firmware) - */ - do_feature_fixups(cur_cpu_spec->cpu_features, - &__start___ftr_fixup, &__stop___ftr_fixup); - do_feature_fixups(cur_cpu_spec->mmu_features, - &__start___mmu_ftr_fixup, &__stop___mmu_ftr_fixup); - do_feature_fixups(powerpc_firmware_features, - &__start___fw_ftr_fixup, &__stop___fw_ftr_fixup); - do_lwsync_fixups(cur_cpu_spec->cpu_features, - &__start___lwsync_fixup, &__stop___lwsync_fixup); - do_final_fixups(); - - /* - * Unflatten the device-tree passed by prom_init or kexec - */ - unflatten_device_tree(); - - /* - * Fill the ppc64_caches & systemcfg structures with informations - * retrieved from the device-tree. - */ - initialize_cache_info(); - -#ifdef CONFIG_PPC_RTAS - /* - * Initialize RTAS if available - */ - rtas_initialize(); -#endif /* CONFIG_PPC_RTAS */ - - /* - * Check if we have an initrd provided via the device-tree - */ - check_for_initrd(); - - /* - * Do some platform specific early initializations, that includes - * setting up the hash table pointers. It also sets up some interrupt-mapping - * related options that will be used by finish_device_tree() - */ - if (ppc_md.init_early) - ppc_md.init_early(); - - /* - * We can discover serial ports now since the above did setup the - * hash table management for us, thus ioremap works. We do that early - * so that further code can be debugged - */ - find_legacy_serial_ports(); - - /* - * Register early console - */ - register_early_udbg_console(); - - /* - * Initialize xmon - */ - xmon_setup(); - - smp_setup_cpu_maps(); - check_smt_enabled(); - -#ifdef CONFIG_SMP - /* Release secondary cpus out of their spinloops at 0x60 now that - * we can map physical -> logical CPU ids - */ - smp_release_cpus(); -#endif - - printk("Starting Linux PPC64 %s\n", init_utsname()->version); - - printk("-----------------------------------------------------\n"); - printk("ppc64_pft_size = 0x%llx\n", ppc64_pft_size); - printk("physicalMemorySize = 0x%llx\n", memblock_phys_mem_size()); - if (ppc64_caches.dline_size != 0x80) - printk("ppc64_caches.dcache_line_size = 0x%x\n", - ppc64_caches.dline_size); - if (ppc64_caches.iline_size != 0x80) - printk("ppc64_caches.icache_line_size = 0x%x\n", - ppc64_caches.iline_size); -#ifdef CONFIG_PPC_STD_MMU_64 - if (htab_address) - printk("htab_address = 0x%p\n", htab_address); - printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); -#endif /* CONFIG_PPC_STD_MMU_64 */ - if (PHYSICAL_START > 0) - printk("physical_start = 0x%llx\n", - (unsigned long long)PHYSICAL_START); - printk("-----------------------------------------------------\n"); - - DBG(" <- setup_system()\n"); -} - -/* This returns the limit below which memory accesses to the linear - * mapping are guarnateed not to cause a TLB or SLB miss. This is - * used to allocate interrupt or emergency stacks for which our - * exception entry path doesn't deal with being interrupted. - */ -static u64 safe_stack_limit(void) -{ -#ifdef CONFIG_PPC_BOOK3E - /* Freescale BookE bolts the entire linear mapping */ - if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) - return linear_map_top; - /* Other BookE, we assume the first GB is bolted */ - return 1ul << 30; -#else - /* BookS, the first segment is bolted */ - if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) - return 1UL << SID_SHIFT_1T; - return 1UL << SID_SHIFT; -#endif -} - -static void __init irqstack_early_init(void) -{ - u64 limit = safe_stack_limit(); - unsigned int i; - - /* - * Interrupt stacks must be in the first segment since we - * cannot afford to take SLB misses on them. - */ - for_each_possible_cpu(i) { - softirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc_base(THREAD_SIZE, - THREAD_SIZE, limit)); - hardirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc_base(THREAD_SIZE, - THREAD_SIZE, limit)); - } -} - -#ifdef CONFIG_PPC_BOOK3E -static void __init exc_lvl_early_init(void) -{ - extern unsigned int interrupt_base_book3e; - extern unsigned int exc_debug_debug_book3e; - - unsigned int i; - - for_each_possible_cpu(i) { - critirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - dbgirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - mcheckirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - } - - if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) - patch_branch(&interrupt_base_book3e + (0x040 / 4) + 1, - (unsigned long)&exc_debug_debug_book3e, 0); -} -#else -#define exc_lvl_early_init() -#endif - -/* - * Stack space used when we detect a bad kernel stack pointer, and - * early in SMP boots before relocation is enabled. - */ -static void __init emergency_stack_init(void) -{ - u64 limit; - unsigned int i; - - /* - * Emergency stacks must be under 256MB, we cannot afford to take - * SLB misses on them. The ABI also requires them to be 128-byte - * aligned. - * - * Since we use these as temporary stacks during secondary CPU - * bringup, we need to get at them in real mode. This means they - * must also be within the RMO region. - */ - limit = min(safe_stack_limit(), ppc64_rma_size); - - for_each_possible_cpu(i) { - unsigned long sp; - sp = memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit); - sp += THREAD_SIZE; - paca[i].emergency_sp = __va(sp); - } -} - -/* - * Called into from start_kernel this initializes bootmem, which is used - * to manage page allocation until mem_init is called. - */ -void __init setup_arch(char **cmdline_p) -{ - ppc64_boot_msg(0x12, "Setup Arch"); - - *cmdline_p = cmd_line; - - /* - * 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. - */ - dcache_bsize = ppc64_caches.dline_size; - icache_bsize = ppc64_caches.iline_size; - - /* reboot on panic */ - panic_timeout = 180; - - if (ppc_md.panic) - setup_panic(); - - init_mm.start_code = (unsigned long)_stext; - init_mm.end_code = (unsigned long) _etext; - init_mm.end_data = (unsigned long) _edata; - init_mm.brk = klimit; - - irqstack_early_init(); - exc_lvl_early_init(); - emergency_stack_init(); - -#ifdef CONFIG_PPC_STD_MMU_64 - stabs_alloc(); -#endif - /* set up the bootmem stuff with available memory */ - do_init_bootmem(); - sparse_init(); - -#ifdef CONFIG_DUMMY_CONSOLE - conswitchp = &dummy_con; -#endif - - if (ppc_md.setup_arch) - ppc_md.setup_arch(); - - paging_init(); - - /* Initialize the MMU context management stuff */ - mmu_context_init(); - - kvm_linear_init(); - - ppc64_boot_msg(0x15, "Setup Done"); -} - - -/* ToDo: do something useful if ppc_md is not yet setup. */ -#define PPC64_LINUX_FUNCTION 0x0f000000 -#define PPC64_IPL_MESSAGE 0xc0000000 -#define PPC64_TERM_MESSAGE 0xb0000000 - -static void ppc64_do_msg(unsigned int src, const char *msg) -{ - if (ppc_md.progress) { - char buf[128]; - - sprintf(buf, "%08X\n", src); - ppc_md.progress(buf, 0); - snprintf(buf, 128, "%s", msg); - ppc_md.progress(buf, 0); - } -} - -/* Print a boot progress message. */ -void ppc64_boot_msg(unsigned int src, const char *msg) -{ - ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg); - printk("[boot]%04x %s\n", src, msg); -} - -#ifdef CONFIG_SMP -#define PCPU_DYN_SIZE () - -static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align) -{ - return __alloc_bootmem_node(NODE_DATA(cpu_to_node(cpu)), size, align, - __pa(MAX_DMA_ADDRESS)); -} - -static void __init pcpu_fc_free(void *ptr, size_t size) -{ - free_bootmem(__pa(ptr), size); -} - -static int pcpu_cpu_distance(unsigned int from, unsigned int to) -{ - if (cpu_to_node(from) == cpu_to_node(to)) - return LOCAL_DISTANCE; - else - return REMOTE_DISTANCE; -} - -unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; -EXPORT_SYMBOL(__per_cpu_offset); - -void __init setup_per_cpu_areas(void) -{ - const size_t dyn_size = PERCPU_MODULE_RESERVE + PERCPU_DYNAMIC_RESERVE; - size_t atom_size; - unsigned long delta; - unsigned int cpu; - int rc; - - /* - * Linear mapping is one of 4K, 1M and 16M. For 4K, no need - * to group units. For larger mappings, use 1M atom which - * should be large enough to contain a number of units. - */ - if (mmu_linear_psize == MMU_PAGE_4K) - atom_size = PAGE_SIZE; - else - atom_size = 1 << 20; - - rc = pcpu_embed_first_chunk(0, dyn_size, atom_size, pcpu_cpu_distance, - pcpu_fc_alloc, pcpu_fc_free); - if (rc < 0) - panic("cannot initialize percpu area (err=%d)", rc); - - delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; - for_each_possible_cpu(cpu) { - __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; - paca[cpu].data_offset = __per_cpu_offset[cpu]; - } -} -#endif - - -#ifdef CONFIG_PPC_INDIRECT_IO -struct ppc_pci_io ppc_pci_io; -EXPORT_SYMBOL(ppc_pci_io); -#endif /* CONFIG_PPC_INDIRECT_IO */ - |