diff options
Diffstat (limited to 'arch/x86/kernel/setup.c')
| -rw-r--r-- | arch/x86/kernel/setup.c | 1060 |
1 files changed, 1060 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c new file mode 100644 index 00000000..1a290156 --- /dev/null +++ b/arch/x86/kernel/setup.c @@ -0,0 +1,1060 @@ +/* + * 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/setup_arch.h> +#include <asm/bios_ebda.h> +#include <asm/cacheflush.h> +#include <asm/processor.h> +#include <asm/bugs.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/amd_nb.h> +#ifdef CONFIG_X86_64 +#include <asm/numa_64.h> +#endif +#include <asm/mce.h> +#include <asm/alternative.h> +#include <asm/prom.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 + + +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) +{ +} +static void __init cleanup_highmap(void) +{ +} +#endif + +static void __init reserve_brk(void) +{ + if (_brk_end > _brk_start) + memblock_reserve(__pa(_brk_start), + __pa(_brk_end) - __pa(_brk_start)); + + /* 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) + 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_reserve(ramdisk_here, area_size); + 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_free(ramdisk_image, ramdisk_end - ramdisk_image); + 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_free(ramdisk_image, ramdisk_end - ramdisk_image); +} +#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) { + u32 data_len, map_len; + + map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), + (u64)sizeof(struct setup_data)); + data = early_memremap(pa_data, map_len); + data_len = data->len + sizeof(struct setup_data); + if (data_len > map_len) { + early_iounmap(data, map_len); + data = early_memremap(pa_data, data_len); + map_len = data_len; + } + + switch (data->type) { + case SETUP_E820_EXT: + parse_e820_ext(data); + break; + case SETUP_DTB: + add_dtb(pa_data); + break; + default: + break; + } + pa_data = data->next; + early_iounmap(data, map_len); + } +} + +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; + + if (boot_params.hdr.version < 0x0209) + return; + pa_data = boot_params.hdr.setup_data; + while (pa_data) { + data = early_memremap(pa_data, sizeof(*data)); + memblock_reserve(pa_data, sizeof(*data) + data->len); + pa_data = data->next; + early_iounmap(data, sizeof(*data)); + } +} + +/* + * --------- Crashkernel reservation ------------------------------ + */ + +#ifdef CONFIG_KEXEC + +/* + * Keep the crash kernel below this limit. On 32 bits earlier kernels + * would limit the kernel to the low 512 MiB due to mapping restrictions. + * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this + * limit once kexec-tools are fixed. + */ +#ifdef CONFIG_X86_32 +# define CRASH_KERNEL_ADDR_MAX (512 << 20) +#else +# define CRASH_KERNEL_ADDR_MAX (896 << 20) +#endif + +static void __init reserve_crashkernel(void) +{ + unsigned long long total_mem; + unsigned long long crash_size, crash_base; + int ret; + + total_mem = memblock_phys_mem_size(); + + 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 */ + + /* + * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX + */ + crash_base = memblock_find_in_range(alignment, + CRASH_KERNEL_ADDR_MAX, crash_size, alignment); + + if (!crash_base) { + pr_info("crashkernel reservation failed - No suitable area found.\n"); + return; + } + } else { + unsigned long long start; + + start = memblock_find_in_range(crash_base, + crash_base + crash_size, crash_size, 1<<20); + if (start != crash_base) { + pr_info("crashkernel reservation failed - memory is in use.\n"); + return; + } + } + memblock_reserve(crash_base, crash_size); + + 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]); + +} + +static __init void reserve_ibft_region(void) +{ + unsigned long addr, size = 0; + + addr = find_ibft_region(&size); + + if (size) + memblock_reserve(addr, size); +} + +static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; + +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. + * + * This typically reserves additional memory (64KiB by default) + * since some BIOSes are known to corrupt low memory. See the + * Kconfig help text for X86_RESERVE_LOW. + */ + e820_update_range(0, ALIGN(reserve_low, 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 int __init parse_reservelow(char *p) +{ + unsigned long long size; + + if (!p) + return -EINVAL; + + size = memparse(p, &p); + + if (size < 4096) + size = 4096; + + if (size > 640*1024) + size = 640*1024; + + reserve_low = size; + + return 0; +} + +early_param("reservelow", parse_reservelow); + +/* + * 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) +{ +#ifdef CONFIG_X86_32 + memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); + visws_early_detect(); + + /* + * copy kernel address range established so far and switch + * to the proper swapper page table + */ + clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, + initial_page_table + KERNEL_PGD_BOUNDARY, + KERNEL_PGD_PTRS); + + load_cr3(swapper_pg_dir); + __flush_tlb_all(); +#else + printk(KERN_INFO "Command line: %s\n", boot_command_line); +#endif + + /* + * If we have OLPC OFW, we might end up relocating the fixmap due to + * reserve_top(), so do this before touching the ioremap area. + */ + 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, + "EL32", 4)) { + efi_enabled = 1; + efi_64bit = false; + } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, + "EL64", 4)) { + efi_enabled = 1; + efi_64bit = true; + } + if (efi_enabled && efi_memblock_x86_reserve_range()) + efi_enabled = 0; +#endif + + x86_init.oem.arch_setup(); + + iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; + 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(); + + /* 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(); + + /* + * 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; +#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(); + + cleanup_highmap(); + + memblock.current_limit = get_max_mapped(); + memblock_x86_fill(); + + /* + * The EFI specification says that boot service code won't be called + * after ExitBootServices(). This is, in fact, a lie. + */ + if (efi_enabled) + efi_reserve_boot_services(); + + /* 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); + + setup_trampolines(); + + 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 + /* Allocate bigger log buffer */ + setup_log_buf(1); + + 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(); + + initmem_init(); + memblock_find_dma_reserve(); + +#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); + + if (boot_cpu_data.cpuid_level >= 0) { + /* A CPU has %cr4 if and only if it has CPUID */ + mmu_cr4_features = read_cr4(); + } + +#ifdef CONFIG_X86_32 + /* sync back kernel address range */ + clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, + swapper_pg_dir + KERNEL_PGD_BOUNDARY, + KERNEL_PGD_PTRS); +#endif + + 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(); + x86_dtb_init(); + + /* + * get boot-time SMP configuration: + */ + if (smp_found_config) + get_smp_config(); + + prefill_possible_map(); + + init_cpu_to_node(); + + init_apic_mappings(); + ioapic_and_gsi_init(); + + 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(); + + x86_init.timers.wallclock_init(); + + x86_platform.wallclock_init(); + + mcheck_init(); + + arch_init_ideal_nops(); +} + +#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 */ |