diff options
| -rw-r--r-- | arch/x86/boot/pmjump.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/boot/pmjump.S b/arch/x86/boot/pmjump.S index 26baeab3a4d4..fa6bed1fac14 100644 --- a/arch/x86/boot/pmjump.S +++ b/arch/x86/boot/pmjump.S | |||
| @@ -28,11 +28,13 @@ | |||
| 28 | * void protected_mode_jump(u32 entrypoint, u32 bootparams); | 28 | * void protected_mode_jump(u32 entrypoint, u32 bootparams); |
| 29 | */ | 29 | */ |
| 30 | protected_mode_jump: | 30 | protected_mode_jump: |
| 31 | xorl %ebx, %ebx # Flag to indicate this is a boot | ||
| 32 | movl %edx, %esi # Pointer to boot_params table | 31 | movl %edx, %esi # Pointer to boot_params table |
| 33 | movl %eax, 2f # Patch ljmpl instruction | 32 | movl %eax, 2f # Patch ljmpl instruction |
| 34 | 33 | ||
| 35 | movw $__BOOT_DS, %cx | 34 | movw $__BOOT_DS, %cx |
| 35 | xorl %ebx, %ebx # Per the 32-bit boot protocol | ||
| 36 | xorl %ebp, %ebp # Per the 32-bit boot protocol | ||
| 37 | xorl %edi, %edi # Per the 32-bit boot protocol | ||
| 36 | 38 | ||
| 37 | movl %cr0, %edx | 39 | movl %cr0, %edx |
| 38 | orb $1, %dl # Protected mode (PE) bit | 40 | orb $1, %dl # Protected mode (PE) bit |