diff options
Diffstat (limited to 'arch/x86_64/kernel/head64.c')
| -rw-r--r-- | arch/x86_64/kernel/head64.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c index cf6ab147a2a..b675c5add01 100644 --- a/arch/x86_64/kernel/head64.c +++ b/arch/x86_64/kernel/head64.c @@ -19,14 +19,15 @@ #include <asm/bootsetup.h> #include <asm/setup.h> #include <asm/desc.h> +#include <asm/pgtable.h> +#include <asm/sections.h> /* Don't add a printk in there. printk relies on the PDA which is not initialized yet. */ static void __init clear_bss(void) { - extern char __bss_start[], __bss_end[]; memset(__bss_start, 0, - (unsigned long) __bss_end - (unsigned long) __bss_start); + (unsigned long) __bss_stop - (unsigned long) __bss_start); } #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ @@ -75,8 +76,6 @@ static void __init setup_boot_cpu_data(void) boot_cpu_data.x86_mask = eax & 0xf; } -extern char _end[]; - void __init x86_64_start_kernel(char * real_mode_data) { char *s; @@ -86,6 +85,13 @@ void __init x86_64_start_kernel(char * real_mode_data) set_intr_gate(i, early_idt_handler); asm volatile("lidt %0" :: "m" (idt_descr)); clear_bss(); + + /* + * switch to init_level4_pgt from boot_level4_pgt + */ + memcpy(init_level4_pgt, boot_level4_pgt, PTRS_PER_PGD*sizeof(pgd_t)); + asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt))); + pda_init(0); copy_bootdata(real_mode_data); #ifdef CONFIG_SMP |