diff options
Diffstat (limited to 'arch/x86/cpu')
| -rw-r--r-- | arch/x86/cpu/start.S | 10 | ||||
| -rw-r--r-- | arch/x86/cpu/start16.S | 3 |
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S index ec12e80..e960e21 100644 --- a/arch/x86/cpu/start.S +++ b/arch/x86/cpu/start.S @@ -55,8 +55,16 @@ _x86boot_start: movl %eax, %cr0 wbinvd + /* Tell 32-bit code it is being entered from an in-RAM copy */ + movw $GD_FLG_WARM_BOOT, %bx + jmp 1f _start: - /* This is the 32-bit cold-reset entry point */ + /* + * This is the 32-bit cold-reset entry point. Initialize %bx to 0 + * in case we're preceeded by some sort of boot stub. + */ + movw $GD_FLG_COLD_BOOT, %bx +1: /* Load the segement registes to match the gdt loaded in start16.S */ movl $(X86_GDT_ENTRY_32BIT_DS * X86_GDT_ENTRY_SIZE), %eax diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S index cc393ff..603bf1d 100644 --- a/arch/x86/cpu/start16.S +++ b/arch/x86/cpu/start16.S @@ -37,6 +37,9 @@ .code16 .globl start16 start16: + /* Set the Cold Boot / Hard Reset flag */ + movl $GD_FLG_COLD_BOOT, %ebx + /* * First we let the BSP do some early initialization * this code have to map the flash to its final position |