diff options
Diffstat (limited to 'arch/x86_64/kernel/head.S')
| -rw-r--r-- | arch/x86_64/kernel/head.S | 77 |
1 files changed, 43 insertions, 34 deletions
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S index 4592bf21fca..15290968e49 100644 --- a/arch/x86_64/kernel/head.S +++ b/arch/x86_64/kernel/head.S @@ -12,6 +12,7 @@ #include <linux/linkage.h> #include <linux/threads.h> +#include <linux/init.h> #include <asm/desc.h> #include <asm/segment.h> #include <asm/page.h> @@ -70,7 +71,7 @@ startup_32: movl %eax, %cr4 /* Setup early boot stage 4 level pagetables */ - movl $(init_level4_pgt - __START_KERNEL_map), %eax + movl $(boot_level4_pgt - __START_KERNEL_map), %eax movl %eax, %cr3 /* Setup EFER (Extended Feature Enable Register) */ @@ -113,7 +114,7 @@ startup_64: movq %rax, %cr4 /* Setup early boot stage 4 level pagetables. */ - movq $(init_level4_pgt - __START_KERNEL_map), %rax + movq $(boot_level4_pgt - __START_KERNEL_map), %rax movq %rax, %cr3 /* Check if nx is implemented */ @@ -240,20 +241,10 @@ ljumpvector: ENTRY(stext) ENTRY(_stext) - /* - * This default setting generates an ident mapping at address 0x100000 - * and a mapping for the kernel that precisely maps virtual address - * 0xffffffff80000000 to physical address 0x000000. (always using - * 2Mbyte large pages provided by PAE mode) - */ .org 0x1000 ENTRY(init_level4_pgt) - .quad 0x0000000000002007 + __PHYSICAL_START /* -> level3_ident_pgt */ - .fill 255,8,0 - .quad 0x000000000000a007 + __PHYSICAL_START - .fill 254,8,0 - /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */ - .quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */ + /* This gets initialized in x86_64_start_kernel */ + .fill 512,8,0 .org 0x2000 ENTRY(level3_ident_pgt) @@ -270,26 +261,26 @@ ENTRY(level3_kernel_pgt) .org 0x4000 ENTRY(level2_ident_pgt) /* 40MB for bootup. */ - .quad 0x0000000000000183 - .quad 0x0000000000200183 - .quad 0x0000000000400183 - .quad 0x0000000000600183 - .quad 0x0000000000800183 - .quad 0x0000000000A00183 - .quad 0x0000000000C00183 - .quad 0x0000000000E00183 - .quad 0x0000000001000183 - .quad 0x0000000001200183 - .quad 0x0000000001400183 - .quad 0x0000000001600183 - .quad 0x0000000001800183 - .quad 0x0000000001A00183 - .quad 0x0000000001C00183 - .quad 0x0000000001E00183 - .quad 0x0000000002000183 - .quad 0x0000000002200183 - .quad 0x0000000002400183 - .quad 0x0000000002600183 + .quad 0x0000000000000083 + .quad 0x0000000000200083 + .quad 0x0000000000400083 + .quad 0x0000000000600083 + .quad 0x0000000000800083 + .quad 0x0000000000A00083 + .quad 0x0000000000C00083 + .quad 0x0000000000E00083 + .quad 0x0000000001000083 + .quad 0x0000000001200083 + .quad 0x0000000001400083 + .quad 0x0000000001600083 + .quad 0x0000000001800083 + .quad 0x0000000001A00083 + .quad 0x0000000001C00083 + .quad 0x0000000001E00083 + .quad 0x0000000002000083 + .quad 0x0000000002200083 + .quad 0x0000000002400083 + .quad 0x0000000002600083 /* Temporary mappings for the super early allocator in arch/x86_64/mm/init.c */ .globl temp_boot_pmds temp_boot_pmds: @@ -350,6 +341,24 @@ ENTRY(wakeup_level4_pgt) .quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */ #endif +#ifndef CONFIG_HOTPLUG_CPU + __INITDATA +#endif + /* + * This default setting generates an ident mapping at address 0x100000 + * and a mapping for the kernel that precisely maps virtual address + * 0xffffffff80000000 to physical address 0x000000. (always using + * 2Mbyte large pages provided by PAE mode) + */ + .align PAGE_SIZE +ENTRY(boot_level4_pgt) + .quad 0x0000000000002007 + __PHYSICAL_START /* -> level3_ident_pgt */ + .fill 255,8,0 + .quad 0x000000000000a007 + __PHYSICAL_START + .fill 254,8,0 + /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */ + .quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */ + .data .align 16 |