diff options
Diffstat (limited to 'arch/i386/kernel/setup.c')
| -rw-r--r-- | arch/i386/kernel/setup.c | 97 |
1 files changed, 91 insertions, 6 deletions
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c index 2bfbddebdbf..7306353c520 100644 --- a/arch/i386/kernel/setup.c +++ b/arch/i386/kernel/setup.c @@ -23,8 +23,10 @@ * This file handles the architecture-dependent parts of initialization */ +#include <linux/config.h> #include <linux/sched.h> #include <linux/mm.h> +#include <linux/mmzone.h> #include <linux/tty.h> #include <linux/ioport.h> #include <linux/acpi.h> @@ -41,7 +43,12 @@ #include <linux/init.h> #include <linux/edd.h> #include <linux/nodemask.h> +#include <linux/kexec.h> +#include <linux/crash_dump.h> + #include <video/edid.h> + +#include <asm/apic.h> #include <asm/e820.h> #include <asm/mpspec.h> #include <asm/setup.h> @@ -53,12 +60,15 @@ #include "setup_arch_pre.h" #include <bios_ebda.h> +/* Forward Declaration. */ +void __init find_max_pfn(void); + /* 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 __initdata = 0; +int disable_pse __devinitdata = 0; /* * Machine setup.. @@ -73,6 +83,7 @@ EXPORT_SYMBOL(efi_enabled); struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; /* common cpu data for all cpus */ struct cpuinfo_x86 boot_cpu_data = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; +EXPORT_SYMBOL(boot_cpu_data); unsigned long mmu_cr4_features; @@ -90,12 +101,18 @@ extern acpi_interrupt_flags acpi_sci_flags; /* for MCA, but anyone else can use it if they want */ unsigned int machine_id; +#ifdef CONFIG_MCA +EXPORT_SYMBOL(machine_id); +#endif unsigned int machine_submodel_id; unsigned int BIOS_revision; unsigned int mca_pentium_flag; /* For PCI or other memory-mapped resources */ unsigned long pci_mem_start = 0x10000000; +#ifdef CONFIG_PCI +EXPORT_SYMBOL(pci_mem_start); +#endif /* Boot loader ID as an integer, for the benefit of proc_dointvec */ int bootloader_type; @@ -107,14 +124,26 @@ static unsigned int highmem_pages = -1; * Setup options */ struct drive_info_struct { char dummy[32]; } drive_info; +#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \ + defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE) +EXPORT_SYMBOL(drive_info); +#endif struct screen_info screen_info; +#ifdef CONFIG_VT +EXPORT_SYMBOL(screen_info); +#endif struct apm_info apm_info; +EXPORT_SYMBOL(apm_info); struct sys_desc_table_struct { unsigned short length; unsigned char table[0]; }; struct edid_info edid_info; struct ist_info ist_info; +#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ + defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) +EXPORT_SYMBOL(ist_info); +#endif struct e820map e820; extern void early_cpu_init(void); @@ -711,6 +740,15 @@ static void __init parse_cmdline_early (char ** cmdline_p) if (to != command_line) to--; if (!memcmp(from+7, "exactmap", 8)) { +#ifdef CONFIG_CRASH_DUMP + /* If we are doing a crash dump, we + * still need to know the real mem + * size before original memory map is + * reset. + */ + find_max_pfn(); + saved_max_pfn = max_pfn; +#endif from += 8+7; e820.nr_map = 0; userdef = 1; @@ -814,6 +852,44 @@ static void __init parse_cmdline_early (char ** cmdline_p) #endif /* CONFIG_X86_LOCAL_APIC */ #endif /* CONFIG_ACPI_BOOT */ +#ifdef CONFIG_X86_LOCAL_APIC + /* enable local APIC */ + else if (!memcmp(from, "lapic", 5)) + lapic_enable(); + + /* disable local APIC */ + else if (!memcmp(from, "nolapic", 6)) + lapic_disable(); +#endif /* CONFIG_X86_LOCAL_APIC */ + +#ifdef CONFIG_KEXEC + /* crashkernel=size@addr specifies the location to reserve for + * a crash kernel. By reserving this memory we guarantee + * that linux never set's it up as a DMA target. + * Useful for holding code to do something appropriate + * after a kernel panic. + */ + else if (!memcmp(from, "crashkernel=", 12)) { + unsigned long size, base; + size = memparse(from+12, &from); + if (*from == '@') { + base = memparse(from+1, &from); + /* FIXME: Do I want a sanity check + * to validate the memory range? + */ + crashk_res.start = base; + crashk_res.end = base + size - 1; + } + } +#endif +#ifdef CONFIG_CRASH_DUMP + /* elfcorehdr= specifies the location of elf core header + * stored by the crashed kernel. + */ + else if (!memcmp(from, "elfcorehdr=", 11)) + elfcorehdr_addr = memparse(from+11, &from); +#endif + /* * highmem=size forces highmem to be exactly 'size' bytes. * This works even on boxes that have no highmem otherwise. @@ -1022,7 +1098,7 @@ static void __init reserve_ebda_region(void) reserve_bootmem(addr, PAGE_SIZE); } -#ifndef CONFIG_DISCONTIGMEM +#ifndef CONFIG_NEED_MULTIPLE_NODES void __init setup_bootmem_allocator(void); static unsigned long __init setup_memory(void) { @@ -1072,9 +1148,9 @@ void __init zone_sizes_init(void) free_area_init(zones_size); } #else -extern unsigned long setup_memory(void); +extern unsigned long __init setup_memory(void); extern void zone_sizes_init(void); -#endif /* !CONFIG_DISCONTIGMEM */ +#endif /* !CONFIG_NEED_MULTIPLE_NODES */ void __init setup_bootmem_allocator(void) { @@ -1092,8 +1168,8 @@ void __init setup_bootmem_allocator(void) * the (very unlikely) case of us accidentally initializing the * bootmem allocator with an invalid RAM area. */ - reserve_bootmem(HIGH_MEMORY, (PFN_PHYS(min_low_pfn) + - bootmap_size + PAGE_SIZE-1) - (HIGH_MEMORY)); + reserve_bootmem(__PHYSICAL_START, (PFN_PHYS(min_low_pfn) + + bootmap_size + PAGE_SIZE-1) - (__PHYSICAL_START)); /* * reserve physical page 0 - it's a special BIOS page on many boxes, @@ -1149,6 +1225,11 @@ void __init setup_bootmem_allocator(void) } } #endif +#ifdef CONFIG_KEXEC + if (crashk_res.start != crashk_res.end) + reserve_bootmem(crashk_res.start, + crashk_res.end - crashk_res.start + 1); +#endif } /* @@ -1202,6 +1283,9 @@ legacy_init_iomem_resources(struct resource *code_resource, struct resource *dat */ request_resource(res, code_resource); request_resource(res, data_resource); +#ifdef CONFIG_KEXEC + request_resource(res, &crashk_res); +#endif } } } @@ -1475,6 +1559,7 @@ void __init setup_arch(char **cmdline_p) #endif paging_init(); remapped_pgdat_init(); + sparse_init(); zone_sizes_init(); /* |