| /* |
| * Copyright (C) 1995 Linus Torvalds |
| * |
| * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 |
| * |
| * Memory region support |
| * David Parsons <orc@pell.chi.il.us>, July-August 1999 |
| * |
| * Added E820 sanitization routine (removes overlapping memory regions); |
| * Brian Moyle <bmoyle@mvista.com>, February 2001 |
| * |
| * Moved CPU detection code to cpu/${cpu}.c |
| * Patrick Mochel <mochel@osdl.org>, March 2002 |
| * |
| * Provisions for empty E820 memory regions (reported by certain BIOSes). |
| * Alex Achenbach <xela@slit.de>, December 2002. |
| * |
| */ |
| |
| /* |
| * This file handles the architecture-dependent parts of initialization |
| */ |
| |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| #include <linux/mmzone.h> |
| #include <linux/screen_info.h> |
| #include <linux/ioport.h> |
| #include <linux/acpi.h> |
| #include <linux/sfi.h> |
| #include <linux/apm_bios.h> |
| #include <linux/initrd.h> |
| #include <linux/bootmem.h> |
| #include <linux/memblock.h> |
| #include <linux/seq_file.h> |
| #include <linux/console.h> |
| #include <linux/mca.h> |
| #include <linux/root_dev.h> |
| #include <linux/highmem.h> |
| #include <linux/module.h> |
| #include <linux/efi.h> |
| #include <linux/init.h> |
| #include <linux/edd.h> |
| #include <linux/iscsi_ibft.h> |
| #include <linux/nodemask.h> |
| #include <linux/kexec.h> |
| #include <linux/dmi.h> |
| #include <linux/pfn.h> |
| #include <linux/pci.h> |
| #include <asm/pci-direct.h> |
| #include <linux/init_ohci1394_dma.h> |
| #include <linux/kvm_para.h> |
| |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/stddef.h> |
| #include <linux/unistd.h> |
| #include <linux/ptrace.h> |
| #include <linux/user.h> |
| #include <linux/delay.h> |
| |
| #include <linux/kallsyms.h> |
| #include <linux/cpufreq.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/ctype.h> |
| #include <linux/uaccess.h> |
| |
| #include <linux/percpu.h> |
| #include <linux/crash_dump.h> |
| #include <linux/tboot.h> |
| |
| #include <video/edid.h> |
| |
| #include <asm/mtrr.h> |
| #include <asm/apic.h> |
| #include <asm/trampoline.h> |
| #include <asm/e820.h> |
| #include <asm/mpspec.h> |
| #include <asm/setup.h> |
| #include <asm/efi.h> |
| #include <asm/timer.h> |
| #include <asm/i8259.h> |
| #include <asm/sections.h> |
| #include <asm/dmi.h> |
| #include <asm/io_apic.h> |
| #include <asm/ist.h> |
| #include <asm/vmi.h> |
| #include <asm/setup_arch.h> |
| #include <asm/bios_ebda.h> |
| #include <asm/cacheflush.h> |
| #include <asm/processor.h> |
| #include <asm/bugs.h> |
| |
| #include <asm/system.h> |
| #include <asm/vsyscall.h> |
| #include <asm/cpu.h> |
| #include <asm/desc.h> |
| #include <asm/dma.h> |
| #include <asm/iommu.h> |
| #include <asm/gart.h> |
| #include <asm/mmu_context.h> |
| #include <asm/proto.h> |
| |
| #include <asm/paravirt.h> |
| #include <asm/hypervisor.h> |
| #include <asm/olpc_ofw.h> |
| |
| #include <asm/percpu.h> |
| #include <asm/topology.h> |
| #include <asm/apicdef.h> |
| #include <asm/k8.h> |
| #ifdef CONFIG_X86_64 |
| #include <asm/numa_64.h> |
| #endif |
| #include <asm/mce.h> |
| |
| /* |
| * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. |
| * The direct mapping extends to max_pfn_mapped, so that we can directly access |
| * apertures, ACPI and other tables without having to play with fixmaps. |
| */ |
| unsigned long max_low_pfn_mapped; |
| unsigned long max_pfn_mapped; |
| |
| #ifdef CONFIG_DMI |
| RESERVE_BRK(dmi_alloc, 65536); |
| #endif |
| |
| unsigned int boot_cpu_id __read_mostly; |
| |
| static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
| unsigned long _brk_end = (unsigned long)__brk_base; |
| |
| #ifdef CONFIG_X86_64 |
| int default_cpu_present_to_apicid(int mps_cpu) |
| { |
| return __default_cpu_present_to_apicid(mps_cpu); |
| } |
| |
| int default_check_phys_apicid_present(int phys_apicid) |
| { |
| return __default_check_phys_apicid_present(phys_apicid); |
| } |
| #endif |
| |
| #ifndef CONFIG_DEBUG_BOOT_PARAMS |
| struct boot_params __initdata boot_params; |
| #else |
| struct boot_params boot_params; |
| #endif |
| |
| /* |
| * Machine setup.. |
| */ |
| static struct resource data_resource = { |
| .name = "Kernel data", |
| .start = 0, |
| .end = 0, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| static struct resource code_resource = { |
| .name = "Kernel code", |
| .start = 0, |
| .end = 0, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| static struct resource bss_resource = { |
| .name = "Kernel bss", |
| .start = 0, |
| .end = 0, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| |
| #ifdef CONFIG_X86_32 |
| /* cpu data as detected by the assembly code in head.S */ |
| struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
| /* common cpu data for all cpus */ |
| struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
| EXPORT_SYMBOL(boot_cpu_data); |
| static void set_mca_bus(int x) |
| { |
| #ifdef CONFIG_MCA |
| MCA_bus = x; |
| #endif |
| } |
| |
| unsigned int def_to_bigsmp; |
| |
| /* for MCA, but anyone else can use it if they want */ |
| unsigned int machine_id; |
| unsigned int machine_submodel_id; |
| unsigned int BIOS_revision; |
| |
| struct apm_info apm_info; |
| EXPORT_SYMBOL(apm_info); |
| |
| #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
| defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) |
| struct ist_info ist_info; |
| EXPORT_SYMBOL(ist_info); |
| #else |
| struct ist_info ist_info; |
| #endif |
| |
| #else |
| struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
| .x86_phys_bits = MAX_PHYSMEM_BITS, |
| }; |
| EXPORT_SYMBOL(boot_cpu_data); |
| #endif |
| |
| |
| #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) |
| unsigned long mmu_cr4_features; |
| #else |
| unsigned long mmu_cr4_features = X86_CR4_PAE; |
| #endif |
| |
| /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
| int bootloader_type, bootloader_version; |
| |
| /* |
| * Setup options |
| */ |
| struct screen_info screen_info; |
| EXPORT_SYMBOL(screen_info); |
| struct edid_info edid_info; |
| EXPORT_SYMBOL_GPL(edid_info); |
| |
| extern int root_mountflags; |
| |
| unsigned long saved_video_mode; |
| |
| #define RAMDISK_IMAGE_START_MASK 0x07FF |
| #define RAMDISK_PROMPT_FLAG 0x8000 |
| #define RAMDISK_LOAD_FLAG 0x4000 |
| |
| static char __initdata command_line[COMMAND_LINE_SIZE]; |
| #ifdef CONFIG_CMDLINE_BOOL |
| static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
| #endif |
| |
| #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
| struct edd edd; |
| #ifdef CONFIG_EDD_MODULE |
| EXPORT_SYMBOL(edd); |
| #endif |
| /** |
| * copy_edd() - Copy the BIOS EDD information |
| * from boot_params into a safe place. |
| * |
| */ |
| static inline void __init copy_edd(void) |
| { |
| memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
| sizeof(edd.mbr_signature)); |
| memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); |
| edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; |
| edd.edd_info_nr = boot_params.eddbuf_entries; |
| } |
| #else |
| static inline void __init copy_edd(void) |
| { |
| } |
| #endif |
| |
| void * __init extend_brk(size_t size, size_t align) |
| { |
| size_t mask = align - 1; |
| void *ret; |
| |
| BUG_ON(_brk_start == 0); |
| BUG_ON(align & mask); |
| |
| _brk_end = (_brk_end + mask) & ~mask; |
| BUG_ON((char *)(_brk_end + size) > __brk_limit); |
| |
| ret = (void *)_brk_end; |
| _brk_end += size; |
| |
| memset(ret, 0, size); |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_X86_64 |
| static void __init init_gbpages(void) |
| { |
| if (direct_gbpages && cpu_has_gbpages) |
| printk(KERN_INFO "Using GB pages for direct mapping\n"); |
| else |
| direct_gbpages = 0; |
| } |
| #else |
| static inline void init_gbpages(void) |
| { |
| } |
| #endif |
| |
| static void __init reserve_brk(void) |
| { |
| if (_brk_end > _brk_start) |
| memblock_x86_reserve_range(__pa(_brk_start), __pa(_brk_end), "BRK"); |
| |
| /* Mark brk area as locked down and no longer taking any |
| new allocations */ |
| _brk_start = 0; |
| } |
| |
| #ifdef CONFIG_BLK_DEV_INITRD |
| |
| #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
| static void __init relocate_initrd(void) |
| { |
| /* Assume only end is not page aligned */ |
| u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| u64 ramdisk_size = boot_params.hdr.ramdisk_size; |
| u64 area_size = PAGE_ALIGN(ramdisk_size); |
| u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; |
| u64 ramdisk_here; |
| unsigned long slop, clen, mapaddr; |
| char *p, *q; |
| |
| /* We need to move the initrd down into lowmem */ |
| ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size, |
| PAGE_SIZE); |
| |
| if (ramdisk_here == MEMBLOCK_ERROR) |
| panic("Cannot find place for new RAMDISK of size %lld\n", |
| ramdisk_size); |
| |
| /* Note: this includes all the lowmem currently occupied by |
| the initrd, we rely on that fact to keep the data intact. */ |
| memblock_x86_reserve_range(ramdisk_here, ramdisk_here + area_size, "NEW RAMDISK"); |
| initrd_start = ramdisk_here + PAGE_OFFSET; |
| initrd_end = initrd_start + ramdisk_size; |
| printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
| ramdisk_here, ramdisk_here + ramdisk_size); |
| |
| q = (char *)initrd_start; |
| |
| /* Copy any lowmem portion of the initrd */ |
| if (ramdisk_image < end_of_lowmem) { |
| clen = end_of_lowmem - ramdisk_image; |
| p = (char *)__va(ramdisk_image); |
| memcpy(q, p, clen); |
| q += clen; |
| ramdisk_image += clen; |
| ramdisk_size -= clen; |
| } |
| |
| /* Copy the highmem portion of the initrd */ |
| while (ramdisk_size) { |
| slop = ramdisk_image & ~PAGE_MASK; |
| clen = ramdisk_size; |
| if (clen > MAX_MAP_CHUNK-slop) |
| clen = MAX_MAP_CHUNK-slop; |
| mapaddr = ramdisk_image & PAGE_MASK; |
| p = early_memremap(mapaddr, clen+slop); |
| memcpy(q, p+slop, clen); |
| early_iounmap(p, clen+slop); |
| q += clen; |
| ramdisk_image += clen; |
| ramdisk_size -= clen; |
| } |
| /* high pages is not converted by early_res_to_bootmem */ |
| ramdisk_image = boot_params.hdr.ramdisk_image; |
| ramdisk_size = boot_params.hdr.ramdisk_size; |
| printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
| " %08llx - %08llx\n", |
| ramdisk_image, ramdisk_image + ramdisk_size - 1, |
| ramdisk_here, ramdisk_here + ramdisk_size - 1); |
| } |
| |
| static void __init reserve_initrd(void) |
| { |
| /* Assume only end is not page aligned */ |
| u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| u64 ramdisk_size = boot_params.hdr.ramdisk_size; |
| u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
| u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; |
| |
| if (!boot_params.hdr.type_of_loader || |
| !ramdisk_image || !ramdisk_size) |
| return; /* No initrd provided by bootloader */ |
| |
| initrd_start = 0; |
| |
| if (ramdisk_size >= (end_of_lowmem>>1)) { |
| memblock_x86_free_range(ramdisk_image, ramdisk_end); |
| printk(KERN_ERR "initrd too large to handle, " |
| "disabling initrd\n"); |
| return; |
| } |
| |
| printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, |
| ramdisk_end); |
| |
| |
| if (ramdisk_end <= end_of_lowmem) { |
| /* All in lowmem, easy case */ |
| /* |
| * don't need to reserve again, already reserved early |
| * in i386_start_kernel |
| */ |
| initrd_start = ramdisk_image + PAGE_OFFSET; |
| initrd_end = initrd_start + ramdisk_size; |
| return; |
| } |
| |
| relocate_initrd(); |
| |
| memblock_x86_free_range(ramdisk_image, ramdisk_end); |
| } |
| #else |
| static void __init reserve_initrd(void) |
| { |
| } |
| #endif /* CONFIG_BLK_DEV_INITRD */ |
| |
| static void __init parse_setup_data(void) |
| { |
| struct setup_data *data; |
| u64 pa_data; |
| |
| if (boot_params.hdr.version < 0x0209) |
| return; |
| pa_data = boot_params.hdr.setup_data; |
| while (pa_data) { |
| data = early_memremap(pa_data, PAGE_SIZE); |
| switch (data->type) { |
| case SETUP_E820_EXT: |
| parse_e820_ext(data, pa_data); |
| break; |
| default: |
| break; |
| } |
| pa_data = data->next; |
| early_iounmap(data, PAGE_SIZE); |
| } |
| } |
| |
| static void __init e820_reserve_setup_data(void) |
| { |
| struct setup_data *data; |
| u64 pa_data; |
| int found = 0; |
| |
| if (boot_params.hdr.version < 0x0209) |
| return; |
| pa_data = boot_params.hdr.setup_data; |
| while (pa_data) { |
| data = early_memremap(pa_data, sizeof(*data)); |
| e820_update_range(pa_data, sizeof(*data)+data->len, |
| E820_RAM, E820_RESERVED_KERN); |
| found = 1; |
| pa_data = data->next; |
| early_iounmap(data, sizeof(*data)); |
| } |
| if (!found) |
| return; |
| |
| sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
| memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
| printk(KERN_INFO "extended physical RAM map:\n"); |
| e820_print_map("reserve setup_data"); |
| } |
| |
| static void __init memblock_x86_reserve_range_setup_data(void) |
| { |
| struct setup_data *data; |
| u64 pa_data; |
| char buf[32]; |
| |
| if (boot_params.hdr.version < 0x0209) |
| return; |
| pa_data = boot_params.hdr.setup_data; |
| while (pa_data) { |
| data = early_memremap(pa_data, sizeof(*data)); |
| sprintf(buf, "setup data %x", data->type); |
| memblock_x86_reserve_range(pa_data, pa_data+sizeof(*data)+data->len, buf); |
| pa_data = data->next; |
| early_iounmap(data, sizeof(*data)); |
| } |
| } |
| |
| /* |
| * --------- Crashkernel reservation ------------------------------ |
| */ |
| |
| #ifdef CONFIG_KEXEC |
| |
| static inline unsigned long long get_total_mem(void) |
| { |
| unsigned long long total; |
| |
| total = max_pfn - min_low_pfn; |
| |
| return total << PAGE_SHIFT; |
| } |
| |
| static void __init reserve_crashkernel(void) |
| { |
| unsigned long long total_mem; |
| unsigned long long crash_size, crash_base; |
| int ret; |
| |
| total_mem = get_total_mem(); |
| |
| ret = parse_crashkernel(boot_command_line, total_mem, |
| &crash_size, &crash_base); |
| if (ret != 0 || crash_size <= 0) |
| return; |
| |
| /* 0 means: find the address automatically */ |
| if (crash_base <= 0) { |
| const unsigned long long alignment = 16<<20; /* 16M */ |
| |
| crash_base = memblock_find_in_range(alignment, ULONG_MAX, crash_size, |
| alignment); |
| if (crash_base == MEMBLOCK_ERROR) { |
| pr_info("crashkernel reservation failed - No suitable area found.\n"); |
| return; |
| } |
| } else { |
| unsigned long long start; |
| |
| start = memblock_find_in_range(crash_base, ULONG_MAX, crash_size, |
| 1<<20); |
| if (start != crash_base) { |
| pr_info("crashkernel reservation failed - memory is in use.\n"); |
| return; |
| } |
| } |
| memblock_x86_reserve_range(crash_base, crash_base + crash_size, "CRASH KERNEL"); |
| |
| printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
| "for crashkernel (System RAM: %ldMB)\n", |
| (unsigned long)(crash_size >> 20), |
| (unsigned long)(crash_base >> 20), |
| (unsigned long)(total_mem >> 20)); |
| |
| crashk_res.start = crash_base; |
| crashk_res.end = crash_base + crash_size - 1; |
| insert_resource(&iomem_resource, &crashk_res); |
| } |
| #else |
| static void __init reserve_crashkernel(void) |
| { |
| } |
| #endif |
| |
| static struct resource standard_io_resources[] = { |
| { .name = "dma1", .start = 0x00, .end = 0x1f, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "pic1", .start = 0x20, .end = 0x21, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "timer0", .start = 0x40, .end = 0x43, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "timer1", .start = 0x50, .end = 0x53, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "keyboard", .start = 0x60, .end = 0x60, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "keyboard", .start = 0x64, .end = 0x64, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "dma page reg", .start = 0x80, .end = 0x8f, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "pic2", .start = 0xa0, .end = 0xa1, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "dma2", .start = 0xc0, .end = 0xdf, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| { .name = "fpu", .start = 0xf0, .end = 0xff, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO } |
| }; |
| |
| void __init reserve_standard_io_resources(void) |
| { |
| int i; |
| |
| /* request I/O space for devices used on all i[345]86 PCs */ |
| for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) |
| request_resource(&ioport_resource, &standard_io_resources[i]); |
| |
| } |
| |
| /* |
| * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by |
| * is_kdump_kernel() to determine if we are booting after a panic. Hence |
| * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. |
| */ |
| |
| #ifdef CONFIG_CRASH_DUMP |
| /* elfcorehdr= specifies the location of elf core header |
| * stored by the crashed kernel. This option will be passed |
| * by kexec loader to the capture kernel. |
| */ |
| static int __init setup_elfcorehdr(char *arg) |
| { |
| char *end; |
| if (!arg) |
| return -EINVAL; |
| elfcorehdr_addr = memparse(arg, &end); |
| return end > arg ? 0 : -EINVAL; |
| } |
| early_param("elfcorehdr", setup_elfcorehdr); |
| #endif |
| |
| static __init void reserve_ibft_region(void) |
| { |
| unsigned long addr, size = 0; |
| |
| addr = find_ibft_region(&size); |
| |
| if (size) |
| memblock_x86_reserve_range(addr, addr + size, "* ibft"); |
| } |
| |
| #ifdef CONFIG_X86_RESERVE_LOW_64K |
| static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
| { |
| printk(KERN_NOTICE |
| "%s detected: BIOS may corrupt low RAM, working around it.\n", |
| d->ident); |
| |
| e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
| sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
| |
| return 0; |
| } |
| #endif |
| |
| /* List of systems that have known low memory corruption BIOS problems */ |
| static struct dmi_system_id __initdata bad_bios_dmi_table[] = { |
| #ifdef CONFIG_X86_RESERVE_LOW_64K |
| { |
| .callback = dmi_low_memory_corruption, |
| .ident = "AMI BIOS", |
| .matches = { |
| DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), |
| }, |
| }, |
| { |
| .callback = dmi_low_memory_corruption, |
| .ident = "Phoenix BIOS", |
| .matches = { |
| DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
| }, |
| }, |
| { |
| .callback = dmi_low_memory_corruption, |
| .ident = "Phoenix/MSC BIOS", |
| .matches = { |
| DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix/MSC"), |
| }, |
| }, |
| /* |
| * AMI BIOS with low memory corruption was found on Intel DG45ID and |
| * DG45FC boards. |
| * It has a different DMI_BIOS_VENDOR = "Intel Corp.", for now we will |
| * match only DMI_BOARD_NAME and see if there is more bad products |
| * with this vendor. |
| */ |
| { |
| .callback = dmi_low_memory_corruption, |
| .ident = "AMI BIOS", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_NAME, "DG45ID"), |
| }, |
| }, |
| { |
| .callback = dmi_low_memory_corruption, |
| .ident = "AMI BIOS", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_NAME, "DG45FC"), |
| }, |
| }, |
| /* |
| * The Dell Inspiron Mini 1012 has DMI_BIOS_VENDOR = "Dell Inc.", so |
| * match on the product name. |
| */ |
| { |
| .callback = dmi_low_memory_corruption, |
| .ident = "Phoenix BIOS", |
| .matches = { |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"), |
| }, |
| }, |
| #endif |
| {} |
| }; |
| |
| static void __init trim_bios_range(void) |
| { |
| /* |
| * A special case is the first 4Kb of memory; |
| * This is a BIOS owned area, not kernel ram, but generally |
| * not listed as such in the E820 table. |
| */ |
| e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED); |
| /* |
| * special case: Some BIOSen report the PC BIOS |
| * area (640->1Mb) as ram even though it is not. |
| * take them out. |
| */ |
| e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); |
| sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
| } |
| |
| static u64 __init get_max_mapped(void) |
| { |
| u64 end = max_pfn_mapped; |
| |
| end <<= PAGE_SHIFT; |
| |
| return end; |
| } |
| |
| /* |
| * Determine if we were loaded by an EFI loader. If so, then we have also been |
| * passed the efi memmap, systab, etc., so we should use these data structures |
| * for initialization. Note, the efi init code path is determined by the |
| * global efi_enabled. This allows the same kernel image to be used on existing |
| * systems (with a traditional BIOS) as well as on EFI systems. |
| */ |
| /* |
| * setup_arch - architecture-specific boot-time initializations |
| * |
| * Note: On x86_64, fixmaps are ready for use even before this is called. |
| */ |
| |
| void __init setup_arch(char **cmdline_p) |
| { |
| int acpi = 0; |
| int k8 = 0; |
| |
| #ifdef CONFIG_X86_32 |
| memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
| visws_early_detect(); |
| #else |
| printk(KERN_INFO "Command line: %s\n", boot_command_line); |
| #endif |
| |
| /* VMI may relocate the fixmap; do this before touching ioremap area */ |
| vmi_init(); |
| |
| /* OFW also may relocate the fixmap */ |
| olpc_ofw_detect(); |
| |
| early_trap_init(); |
| early_cpu_init(); |
| early_ioremap_init(); |
| |
| setup_olpc_ofw_pgd(); |
| |
| ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
| screen_info = boot_params.screen_info; |
| edid_info = boot_params.edid_info; |
| #ifdef CONFIG_X86_32 |
| apm_info.bios = boot_params.apm_bios_info; |
| ist_info = boot_params.ist_info; |
| if (boot_params.sys_desc_table.length != 0) { |
| set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
| machine_id = boot_params.sys_desc_table.table[0]; |
| machine_submodel_id = boot_params.sys_desc_table.table[1]; |
| BIOS_revision = boot_params.sys_desc_table.table[2]; |
| } |
| #endif |
| saved_video_mode = boot_params.hdr.vid_mode; |
| bootloader_type = boot_params.hdr.type_of_loader; |
| if ((bootloader_type >> 4) == 0xe) { |
| bootloader_type &= 0xf; |
| bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; |
| } |
| bootloader_version = bootloader_type & 0xf; |
| bootloader_version |= boot_params.hdr.ext_loader_ver << 4; |
| |
| #ifdef CONFIG_BLK_DEV_RAM |
| rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
| rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); |
| rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); |
| #endif |
| #ifdef CONFIG_EFI |
| if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
| #ifdef CONFIG_X86_32 |
| "EL32", |
| #else |
| "EL64", |
| #endif |
| 4)) { |
| efi_enabled = 1; |
| efi_memblock_x86_reserve_range(); |
| } |
| #endif |
| |
| x86_init.oem.arch_setup(); |
| |
| setup_memory_map(); |
| parse_setup_data(); |
| /* update the e820_saved too */ |
| e820_reserve_setup_data(); |
| |
| copy_edd(); |
| |
| if (!boot_params.hdr.root_flags) |
| root_mountflags &= ~MS_RDONLY; |
| init_mm.start_code = (unsigned long) _text; |
| init_mm.end_code = (unsigned long) _etext; |
| init_mm.end_data = (unsigned long) _edata; |
| init_mm.brk = _brk_end; |
| |
| code_resource.start = virt_to_phys(_text); |
| code_resource.end = virt_to_phys(_etext)-1; |
| data_resource.start = virt_to_phys(_etext); |
| data_resource.end = virt_to_phys(_edata)-1; |
| bss_resource.start = virt_to_phys(&__bss_start); |
| bss_resource.end = virt_to_phys(&__bss_stop)-1; |
| |
| #ifdef CONFIG_CMDLINE_BOOL |
| #ifdef CONFIG_CMDLINE_OVERRIDE |
| strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| #else |
| if (builtin_cmdline[0]) { |
| /* append boot loader cmdline to builtin */ |
| strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); |
| strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); |
| strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| } |
| #endif |
| #endif |
| |
| strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
| *cmdline_p = command_line; |
| |
| /* |
| * x86_configure_nx() is called before parse_early_param() to detect |
| * whether hardware doesn't support NX (so that the early EHCI debug |
| * console setup can safely call set_fixmap()). It may then be called |
| * again from within noexec_setup() during parsing early parameters |
| * to honor the respective command line option. |
| */ |
| x86_configure_nx(); |
| |
| parse_early_param(); |
| |
| x86_report_nx(); |
| |
| /* Must be before kernel pagetables are setup */ |
| vmi_activate(); |
| |
| /* after early param, so could get panic from serial */ |
| memblock_x86_reserve_range_setup_data(); |
| |
| if (acpi_mps_check()) { |
| #ifdef CONFIG_X86_LOCAL_APIC |
| disable_apic = 1; |
| #endif |
| setup_clear_cpu_cap(X86_FEATURE_APIC); |
| } |
| |
| #ifdef CONFIG_PCI |
| if (pci_early_dump_regs) |
| early_dump_pci_devices(); |
| #endif |
| |
| finish_e820_parsing(); |
| |
| if (efi_enabled) |
| efi_init(); |
| |
| dmi_scan_machine(); |
| |
| dmi_check_system(bad_bios_dmi_table); |
| |
| /* |
| * VMware detection requires dmi to be available, so this |
| * needs to be done after dmi_scan_machine, for the BP. |
| */ |
| init_hypervisor_platform(); |
| |
| x86_init.resources.probe_roms(); |
| |
| /* after parse_early_param, so could debug it */ |
| insert_resource(&iomem_resource, &code_resource); |
| insert_resource(&iomem_resource, &data_resource); |
| insert_resource(&iomem_resource, &bss_resource); |
| |
| trim_bios_range(); |
| #ifdef CONFIG_X86_32 |
| if (ppro_with_ram_bug()) { |
| e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, |
| E820_RESERVED); |
| sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
| printk(KERN_INFO "fixed physical RAM map:\n"); |
| e820_print_map("bad_ppro"); |
| } |
| #else |
| early_gart_iommu_check(); |
| #endif |
| |
| /* |
| * partially used pages are not usable - thus |
| * we are rounding upwards: |
| */ |
| max_pfn = e820_end_of_ram_pfn(); |
| |
| /* update e820 for memory not covered by WB MTRRs */ |
| mtrr_bp_init(); |
| if (mtrr_trim_uncached_memory(max_pfn)) |
| max_pfn = e820_end_of_ram_pfn(); |
| |
| #ifdef CONFIG_X86_32 |
| /* max_low_pfn get updated here */ |
| find_low_pfn_range(); |
| #else |
| num_physpages = max_pfn; |
| |
| check_x2apic(); |
| |
| /* How many end-of-memory variables you have, grandma! */ |
| /* need this before calling reserve_initrd */ |
| if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
| max_low_pfn = e820_end_of_low_ram_pfn(); |
| else |
| max_low_pfn = max_pfn; |
| |
| high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
| max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; |
| #endif |
| |
| /* |
| * Find and reserve possible boot-time SMP configuration: |
| */ |
| find_smp_config(); |
| |
| reserve_ibft_region(); |
| |
| /* |
| * Need to conclude brk, before memblock_x86_fill() |
| * it could use memblock_find_in_range, could overlap with |
| * brk area. |
| */ |
| reserve_brk(); |
| |
| memblock.current_limit = get_max_mapped(); |
| memblock_x86_fill(); |
| |
| /* preallocate 4k for mptable mpc */ |
| early_reserve_e820_mpc_new(); |
| |
| #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
| setup_bios_corruption_check(); |
| #endif |
| |
| printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", |
| max_pfn_mapped<<PAGE_SHIFT); |
| |
| reserve_trampoline_memory(); |
| |
| #ifdef CONFIG_ACPI_SLEEP |
| /* |
| * Reserve low memory region for sleep support. |
| * even before init_memory_mapping |
| */ |
| acpi_reserve_wakeup_memory(); |
| #endif |
| init_gbpages(); |
| |
| /* max_pfn_mapped is updated here */ |
| max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
| max_pfn_mapped = max_low_pfn_mapped; |
| |
| #ifdef CONFIG_X86_64 |
| if (max_pfn > max_low_pfn) { |
| max_pfn_mapped = init_memory_mapping(1UL<<32, |
| max_pfn<<PAGE_SHIFT); |
| /* can we preseve max_low_pfn ?*/ |
| max_low_pfn = max_pfn; |
| } |
| #endif |
| memblock.current_limit = get_max_mapped(); |
| |
| /* |
| * NOTE: On x86-32, only from this point on, fixmaps are ready for use. |
| */ |
| |
| #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT |
| if (init_ohci1394_dma_early) |
| init_ohci1394_dma_on_all_controllers(); |
| #endif |
| |
| reserve_initrd(); |
| |
| reserve_crashkernel(); |
| |
| vsmp_init(); |
| |
| io_delay_init(); |
| |
| /* |
| * Parse the ACPI tables for possible boot-time SMP configuration. |
| */ |
| acpi_boot_table_init(); |
| |
| early_acpi_boot_init(); |
| |
| #ifdef CONFIG_ACPI_NUMA |
| /* |
| * Parse SRAT to discover nodes. |
| */ |
| acpi = acpi_numa_init(); |
| #endif |
| |
| #ifdef CONFIG_K8_NUMA |
| if (!acpi) |
| k8 = !k8_numa_init(0, max_pfn); |
| #endif |
| |
| initmem_init(0, max_pfn, acpi, k8); |
| memblock_find_dma_reserve(); |
| dma32_reserve_bootmem(); |
| |
| #ifdef CONFIG_KVM_CLOCK |
| kvmclock_init(); |
| #endif |
| |
| x86_init.paging.pagetable_setup_start(swapper_pg_dir); |
| paging_init(); |
| x86_init.paging.pagetable_setup_done(swapper_pg_dir); |
| |
| setup_trampoline_page_table(); |
| |
| tboot_probe(); |
| |
| #ifdef CONFIG_X86_64 |
| map_vsyscall(); |
| #endif |
| |
| generic_apic_probe(); |
| |
| early_quirks(); |
| |
| /* |
| * Read APIC and some other early information from ACPI tables. |
| */ |
| acpi_boot_init(); |
| |
| sfi_init(); |
| |
| /* |
| * get boot-time SMP configuration: |
| */ |
| if (smp_found_config) |
| get_smp_config(); |
| |
| prefill_possible_map(); |
| |
| #ifdef CONFIG_X86_64 |
| init_cpu_to_node(); |
| #endif |
| |
| init_apic_mappings(); |
| ioapic_init_mappings(); |
| |
| /* need to wait for io_apic is mapped */ |
| probe_nr_irqs_gsi(); |
| |
| kvm_guest_init(); |
| |
| e820_reserve_resources(); |
| e820_mark_nosave_regions(max_low_pfn); |
| |
| x86_init.resources.reserve_resources(); |
| |
| e820_setup_gap(); |
| |
| #ifdef CONFIG_VT |
| #if defined(CONFIG_VGA_CONSOLE) |
| if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
| conswitchp = &vga_con; |
| #elif defined(CONFIG_DUMMY_CONSOLE) |
| conswitchp = &dummy_con; |
| #endif |
| #endif |
| x86_init.oem.banner(); |
| |
| mcheck_init(); |
| } |
| |
| #ifdef CONFIG_X86_32 |
| |
| static struct resource video_ram_resource = { |
| .name = "Video RAM area", |
| .start = 0xa0000, |
| .end = 0xbffff, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| void __init i386_reserve_resources(void) |
| { |
| request_resource(&iomem_resource, &video_ram_resource); |
| reserve_standard_io_resources(); |
| } |
| |
| #endif /* CONFIG_X86_32 */ |