| /* |
| * 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/apm_bios.h> |
| #include <linux/initrd.h> |
| #include <linux/bootmem.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/nodemask.h> |
| #include <linux/kexec.h> |
| #include <linux/crash_dump.h> |
| #include <linux/dmi.h> |
| #include <linux/pfn.h> |
| #include <linux/pci.h> |
| |
| #include <video/edid.h> |
| |
| #include <asm/apic.h> |
| #include <asm/e820.h> |
| #include <asm/mpspec.h> |
| #include <asm/mmzone.h> |
| #include <asm/setup.h> |
| #include <asm/arch_hooks.h> |
| #include <asm/sections.h> |
| #include <asm/io_apic.h> |
| #include <asm/ist.h> |
| #include <asm/io.h> |
| #include <asm/vmi.h> |
| #include <setup_arch.h> |
| #include <bios_ebda.h> |
| #include <asm/cacheflush.h> |
| |
| /* This value is set up by the early boot code to point to the value |
| immediately after the boot time page tables. It contains a *physical* |
| address, and must not be in the .bss segment! */ |
| unsigned long init_pg_tables_end __initdata = ~0UL; |
| |
| int disable_pse __cpuinitdata = 0; |
| |
| /* |
| * 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 |
| }; |
| |
| static struct resource video_ram_resource = { |
| .name = "Video RAM area", |
| .start = 0xa0000, |
| .end = 0xbffff, |
| .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| }; |
| |
| static struct resource standard_io_resources[] = { { |
| .name = "dma1", |
| .start = 0x0000, |
| .end = 0x001f, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "pic1", |
| .start = 0x0020, |
| .end = 0x0021, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "timer0", |
| .start = 0x0040, |
| .end = 0x0043, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "timer1", |
| .start = 0x0050, |
| .end = 0x0053, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "keyboard", |
| .start = 0x0060, |
| .end = 0x006f, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "dma page reg", |
| .start = 0x0080, |
| .end = 0x008f, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "pic2", |
| .start = 0x00a0, |
| .end = 0x00a1, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "dma2", |
| .start = 0x00c0, |
| .end = 0x00df, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| }, { |
| .name = "fpu", |
| .start = 0x00f0, |
| .end = 0x00ff, |
| .flags = IORESOURCE_BUSY | IORESOURCE_IO |
| } }; |
| |
| /* 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); |
| |
| unsigned long mmu_cr4_features; |
| |
| /* for MCA, but anyone else can use it if they want */ |
| unsigned int machine_id; |
| unsigned int machine_submodel_id; |
| unsigned int BIOS_revision; |
| unsigned int mca_pentium_flag; |
| |
| /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
| int bootloader_type; |
| |
| /* user-defined highmem size */ |
| static unsigned int highmem_pages = -1; |
| |
| /* |
| * Setup options |
| */ |
| struct screen_info screen_info; |
| EXPORT_SYMBOL(screen_info); |
| struct apm_info apm_info; |
| EXPORT_SYMBOL(apm_info); |
| struct edid_info edid_info; |
| EXPORT_SYMBOL_GPL(edid_info); |
| struct ist_info ist_info; |
| #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
| defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) |
| EXPORT_SYMBOL(ist_info); |
| #endif |
| |
| extern void early_cpu_init(void); |
| extern int root_mountflags; |
| |
| unsigned long saved_videomode; |
| |
| #define RAMDISK_IMAGE_START_MASK 0x07FF |
| #define RAMDISK_PROMPT_FLAG 0x8000 |
| #define RAMDISK_LOAD_FLAG 0x4000 |
| |
| static char __initdata command_line[COMMAND_LINE_SIZE]; |
| |
| struct boot_params __initdata boot_params; |
| |
| #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 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 copy_edd(void) |
| { |
| } |
| #endif |
| |
| int __initdata user_defined_memmap = 0; |
| |
| /* |
| * "mem=nopentium" disables the 4MB page tables. |
| * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM |
| * to <mem>, overriding the bios size. |
| * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from |
| * <start> to <start>+<mem>, overriding the bios size. |
| * |
| * HPA tells me bootloaders need to parse mem=, so no new |
| * option should be mem= [also see Documentation/i386/boot.txt] |
| */ |
| static int __init parse_mem(char *arg) |
| { |
| if (!arg) |
| return -EINVAL; |
| |
| if (strcmp(arg, "nopentium") == 0) { |
| clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PSE); |
| disable_pse = 1; |
| } else { |
| /* If the user specifies memory size, we |
| * limit the BIOS-provided memory map to |
| * that size. exactmap can be used to specify |
| * the exact map. mem=number can be used to |
| * trim the existing memory map. |
| */ |
| unsigned long long mem_size; |
| |
| mem_size = memparse(arg, &arg); |
| limit_regions(mem_size); |
| user_defined_memmap = 1; |
| } |
| return 0; |
| } |
| early_param("mem", parse_mem); |
| |
| #ifdef CONFIG_PROC_VMCORE |
| /* elfcorehdr= specifies the location of elf core header |
| * stored by the crashed kernel. |
| */ |
| static int __init parse_elfcorehdr(char *arg) |
| { |
| if (!arg) |
| return -EINVAL; |
| |
| elfcorehdr_addr = memparse(arg, &arg); |
| return 0; |
| } |
| early_param("elfcorehdr", parse_elfcorehdr); |
| #endif /* CONFIG_PROC_VMCORE */ |
| |
| /* |
| * highmem=size forces highmem to be exactly 'size' bytes. |
| * This works even on boxes that have no highmem otherwise. |
| * This also works to reduce highmem size on bigger boxes. |
| */ |
| static int __init parse_highmem(char *arg) |
| { |
| if (!arg) |
| return -EINVAL; |
| |
| highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT; |
| return 0; |
| } |
| early_param("highmem", parse_highmem); |
| |
| /* |
| * vmalloc=size forces the vmalloc area to be exactly 'size' |
| * bytes. This can be used to increase (or decrease) the |
| * vmalloc area - the default is 128m. |
| */ |
| static int __init parse_vmalloc(char *arg) |
| { |
| if (!arg) |
| return -EINVAL; |
| |
| __VMALLOC_RESERVE = memparse(arg, &arg); |
| return 0; |
| } |
| early_param("vmalloc", parse_vmalloc); |
| |
| /* |
| * reservetop=size reserves a hole at the top of the kernel address space which |
| * a hypervisor can load into later. Needed for dynamically loaded hypervisors, |
| * so relocating the fixmap can be done before paging initialization. |
| */ |
| static int __init parse_reservetop(char *arg) |
| { |
| unsigned long address; |
| |
| if (!arg) |
| return -EINVAL; |
| |
| address = memparse(arg, &arg); |
| reserve_top_address(address); |
| return 0; |
| } |
| early_param("reservetop", parse_reservetop); |
| |
| /* |
| * Determine low and high memory ranges: |
| */ |
| unsigned long __init find_max_low_pfn(void) |
| { |
| unsigned long max_low_pfn; |
| |
| max_low_pfn = max_pfn; |
| if (max_low_pfn > MAXMEM_PFN) { |
| if (highmem_pages == -1) |
| highmem_pages = max_pfn - MAXMEM_PFN; |
| if (highmem_pages + MAXMEM_PFN < max_pfn) |
| max_pfn = MAXMEM_PFN + highmem_pages; |
| if (highmem_pages + MAXMEM_PFN > max_pfn) { |
| printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages)); |
| highmem_pages = 0; |
| } |
| max_low_pfn = MAXMEM_PFN; |
| #ifndef CONFIG_HIGHMEM |
| /* Maximum memory usable is what is directly addressable */ |
| printk(KERN_WARNING "Warning only %ldMB will be used.\n", |
| MAXMEM>>20); |
| if (max_pfn > MAX_NONPAE_PFN) |
| printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
| else |
| printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); |
| max_pfn = MAXMEM_PFN; |
| #else /* !CONFIG_HIGHMEM */ |
| #ifndef CONFIG_HIGHMEM64G |
| if (max_pfn > MAX_NONPAE_PFN) { |
| max_pfn = MAX_NONPAE_PFN; |
| printk(KERN_WARNING "Warning only 4GB will be used.\n"); |
| printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n"); |
| } |
| #endif /* !CONFIG_HIGHMEM64G */ |
| #endif /* !CONFIG_HIGHMEM */ |
| } else { |
| if (highmem_pages == -1) |
| highmem_pages = 0; |
| #ifdef CONFIG_HIGHMEM |
| if (highmem_pages >= max_pfn) { |
| printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn)); |
| highmem_pages = 0; |
| } |
| if (highmem_pages) { |
| if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){ |
| printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages)); |
| highmem_pages = 0; |
| } |
| max_low_pfn -= highmem_pages; |
| } |
| #else |
| if (highmem_pages) |
| printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n"); |
| #endif |
| } |
| return max_low_pfn; |
| } |
| |
| /* |
| * workaround for Dell systems that neglect to reserve EBDA |
| */ |
| static void __init reserve_ebda_region(void) |
| { |
| unsigned int addr; |
| addr = get_bios_ebda(); |
| if (addr) |
| reserve_bootmem(addr, PAGE_SIZE); |
| } |
| |
| #ifndef CONFIG_NEED_MULTIPLE_NODES |
| void __init setup_bootmem_allocator(void); |
| static unsigned long __init setup_memory(void) |
| { |
| /* |
| * partially used pages are not usable - thus |
| * we are rounding upwards: |
| */ |
| min_low_pfn = PFN_UP(init_pg_tables_end); |
| |
| find_max_pfn(); |
| |
| max_low_pfn = find_max_low_pfn(); |
| |
| #ifdef CONFIG_HIGHMEM |
| highstart_pfn = highend_pfn = max_pfn; |
| if (max_pfn > max_low_pfn) { |
| highstart_pfn = max_low_pfn; |
| } |
| printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", |
| pages_to_mb(highend_pfn - highstart_pfn)); |
| num_physpages = highend_pfn; |
| high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; |
| #else |
| num_physpages = max_low_pfn; |
| high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; |
| #endif |
| #ifdef CONFIG_FLATMEM |
| max_mapnr = num_physpages; |
| #endif |
| printk(KERN_NOTICE "%ldMB LOWMEM available.\n", |
| pages_to_mb(max_low_pfn)); |
| |
| setup_bootmem_allocator(); |
| |
| return max_low_pfn; |
| } |
| |
| void __init zone_sizes_init(void) |
| { |
| unsigned long max_zone_pfns[MAX_NR_ZONES]; |
| memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
| max_zone_pfns[ZONE_DMA] = |
| virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; |
| max_zone_pfns[ZONE_NORMAL] = max_low_pfn; |
| #ifdef CONFIG_HIGHMEM |
| max_zone_pfns[ZONE_HIGHMEM] = highend_pfn; |
| add_active_range(0, 0, highend_pfn); |
| #else |
| add_active_range(0, 0, max_low_pfn); |
| #endif |
| |
| free_area_init_nodes(max_zone_pfns); |
| } |
| #else |
| extern unsigned long __init setup_memory(void); |
| extern void zone_sizes_init(void); |
| #endif /* !CONFIG_NEED_MULTIPLE_NODES */ |
| |
| static inline unsigned long long get_total_mem(void) |
| { |
| unsigned long long total; |
| |
| total = max_low_pfn - min_low_pfn; |
| #ifdef CONFIG_HIGHMEM |
| total += highend_pfn - highstart_pfn; |
| #endif |
| |
| return total << PAGE_SHIFT; |
| } |
| |
| #ifdef CONFIG_KEXEC |
| 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) { |
| if (crash_base > 0) { |
| 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; |
| reserve_bootmem(crash_base, crash_size); |
| } else |
| printk(KERN_INFO "crashkernel reservation failed - " |
| "you have to specify a base address\n"); |
| } |
| } |
| #else |
| static inline void __init reserve_crashkernel(void) |
| {} |
| #endif |
| |
| void __init setup_bootmem_allocator(void) |
| { |
| unsigned long bootmap_size; |
| /* |
| * Initialize the boot-time allocator (with low memory only): |
| */ |
| bootmap_size = init_bootmem(min_low_pfn, max_low_pfn); |
| |
| register_bootmem_low_pages(max_low_pfn); |
| |
| /* |
| * Reserve the bootmem bitmap itself as well. We do this in two |
| * steps (first step was init_bootmem()) because this catches |
| * the (very unlikely) case of us accidentally initializing the |
| * bootmem allocator with an invalid RAM area. |
| */ |
| reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) + |
| bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text)); |
| |
| /* |
| * reserve physical page 0 - it's a special BIOS page on many boxes, |
| * enabling clean reboots, SMP operation, laptop functions. |
| */ |
| reserve_bootmem(0, PAGE_SIZE); |
| |
| /* reserve EBDA region, it's a 4K region */ |
| reserve_ebda_region(); |
| |
| /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent |
| PCI prefetch into it (errata #56). Usually the page is reserved anyways, |
| unless you have no PS/2 mouse plugged in. */ |
| if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && |
| boot_cpu_data.x86 == 6) |
| reserve_bootmem(0xa0000 - 4096, 4096); |
| |
| #ifdef CONFIG_SMP |
| /* |
| * But first pinch a few for the stack/trampoline stuff |
| * FIXME: Don't need the extra page at 4K, but need to fix |
| * trampoline before removing it. (see the GDT stuff) |
| */ |
| reserve_bootmem(PAGE_SIZE, PAGE_SIZE); |
| #endif |
| #ifdef CONFIG_ACPI_SLEEP |
| /* |
| * Reserve low memory region for sleep support. |
| */ |
| acpi_reserve_bootmem(); |
| #endif |
| #ifdef CONFIG_X86_FIND_SMP_CONFIG |
| /* |
| * Find and reserve possible boot-time SMP configuration: |
| */ |
| find_smp_config(); |
| #endif |
| numa_kva_reserve(); |
| #ifdef CONFIG_BLK_DEV_INITRD |
| if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { |
| unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; |
| unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; |
| unsigned long ramdisk_end = ramdisk_image + ramdisk_size; |
| unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
| |
| if (ramdisk_end <= end_of_lowmem) { |
| reserve_bootmem(ramdisk_image, ramdisk_size); |
| initrd_start = ramdisk_image + PAGE_OFFSET; |
| initrd_end = initrd_start+ramdisk_size; |
| } else { |
| printk(KERN_ERR "initrd extends beyond end of memory " |
| "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
| ramdisk_end, end_of_lowmem); |
| initrd_start = 0; |
| } |
| } |
| #endif |
| reserve_crashkernel(); |
| } |
| |
| /* |
| * The node 0 pgdat is initialized before all of these because |
| * it's needed for bootmem. node>0 pgdats have their virtual |
| * space allocated before the pagetables are in place to access |
| * them, so they can't be cleared then. |
| * |
| * This should all compile down to nothing when NUMA is off. |
| */ |
| static void __init remapped_pgdat_init(void) |
| { |
| int nid; |
| |
| for_each_online_node(nid) { |
| if (nid != 0) |
| memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); |
| } |
| } |
| |
| #ifdef CONFIG_MCA |
| static void set_mca_bus(int x) |
| { |
| MCA_bus = x; |
| } |
| #else |
| static void set_mca_bus(int x) { } |
| #endif |
| |
| /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
| char * __init __attribute__((weak)) memory_setup(void) |
| { |
| return machine_specific_memory_setup(); |
| } |
| |
| /* |
| * 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. |
| */ |
| void __init setup_arch(char **cmdline_p) |
| { |
| unsigned long max_low_pfn; |
| |
| memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
| pre_setup_arch_hook(); |
| early_cpu_init(); |
| |
| #ifdef CONFIG_EFI |
| if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
| "EL32", 4)) |
| efi_enabled = 1; |
| #endif |
| |
| ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
| screen_info = boot_params.screen_info; |
| edid_info = boot_params.edid_info; |
| apm_info.bios = boot_params.apm_bios_info; |
| ist_info = boot_params.ist_info; |
| saved_videomode = boot_params.hdr.vid_mode; |
| 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]; |
| } |
| bootloader_type = boot_params.hdr.type_of_loader; |
| |
| #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 |
| ARCH_SETUP |
| |
| printk(KERN_INFO "BIOS-provided physical RAM map:\n"); |
| print_memory_map(memory_setup()); |
| |
| if (efi_enabled) |
| efi_init(); |
| |
| 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 = init_pg_tables_end + PAGE_OFFSET; |
| |
| 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; |
| |
| parse_early_param(); |
| |
| if (user_defined_memmap) { |
| printk(KERN_INFO "user-defined physical RAM map:\n"); |
| print_memory_map("user"); |
| } |
| |
| strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
| *cmdline_p = command_line; |
| |
| max_low_pfn = setup_memory(); |
| |
| #ifdef CONFIG_VMI |
| /* |
| * Must be after max_low_pfn is determined, and before kernel |
| * pagetables are setup. |
| */ |
| vmi_init(); |
| #endif |
| |
| /* |
| * NOTE: before this point _nobody_ is allowed to allocate |
| * any memory using the bootmem allocator. Although the |
| * allocator is now initialised only the first 8Mb of the kernel |
| * virtual address space has been mapped. All allocations before |
| * paging_init() has completed must use the alloc_bootmem_low_pages() |
| * variant (which allocates DMA'able memory) and care must be taken |
| * not to exceed the 8Mb limit. |
| */ |
| |
| #ifdef CONFIG_SMP |
| smp_alloc_memory(); /* AP processor realmode stacks in low memory*/ |
| #endif |
| paging_init(); |
| remapped_pgdat_init(); |
| sparse_init(); |
| zone_sizes_init(); |
| |
| /* |
| * NOTE: at this point the bootmem allocator is fully available. |
| */ |
| |
| paravirt_post_allocator_init(); |
| |
| dmi_scan_machine(); |
| |
| io_delay_init();; |
| |
| #ifdef CONFIG_X86_GENERICARCH |
| generic_apic_probe(); |
| #endif |
| if (efi_enabled) |
| efi_map_memmap(); |
| |
| #ifdef CONFIG_ACPI |
| /* |
| * Parse the ACPI tables for possible boot-time SMP configuration. |
| */ |
| acpi_boot_table_init(); |
| #endif |
| |
| early_quirks(); |
| |
| #ifdef CONFIG_ACPI |
| acpi_boot_init(); |
| |
| #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) |
| if (def_to_bigsmp) |
| printk(KERN_WARNING "More than 8 CPUs detected and " |
| "CONFIG_X86_PC cannot handle it.\nUse " |
| "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); |
| #endif |
| #endif |
| #ifdef CONFIG_X86_LOCAL_APIC |
| if (smp_found_config) |
| get_smp_config(); |
| #endif |
| |
| e820_register_memory(); |
| e820_mark_nosave_regions(); |
| |
| #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 |
| } |
| |
| /* |
| * Request address space for all standard resources |
| * |
| * This is called just before pcibios_init(), which is also a |
| * subsys_initcall, but is linked in later (in arch/i386/pci/common.c). |
| */ |
| static int __init request_standard_resources(void) |
| { |
| int i; |
| |
| printk(KERN_INFO "Setting up standard PCI resources\n"); |
| init_iomem_resources(&code_resource, &data_resource, &bss_resource); |
| |
| request_resource(&iomem_resource, &video_ram_resource); |
| |
| /* 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]); |
| return 0; |
| } |
| |
| subsys_initcall(request_standard_resources); |