diff options
| author | Simon Glass <sjg@chromium.org> | 2014-11-06 13:20:10 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-11-21 07:24:10 +0100 |
| commit | f67cd51e654ba6498230314b6e82b4dbbd4bfca7 (patch) | |
| tree | 9f0b5e3b81734484df64e8b679a0eb66532ec49a /arch/x86/cpu/start.S | |
| parent | e1ffd81797d59652124bd9cda813a58644f5dea9 (diff) | |
x86: Save the BIST value on reset
The built in self test value is available in register eax on start-up. Save
it so that it can be accessed later. Unfortunately we must wait until the
global_data is available before we can do this, so there is a little bit of
shuffling to keep it around.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/cpu/start.S')
| -rw-r--r-- | arch/x86/cpu/start.S | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S index 781d32447b..b18f3201bc 100644 --- a/arch/x86/cpu/start.S +++ b/arch/x86/cpu/start.S @@ -49,6 +49,8 @@ _start: */ movw $GD_FLG_COLD_BOOT, %bx 1: + /* Save BIST */ + movl %eax, %ebp /* Load the segement registes to match the gdt loaded in start16.S */ movl $(X86_GDT_ENTRY_32BIT_DS * X86_GDT_ENTRY_SIZE), %eax @@ -117,9 +119,10 @@ car_init_ret: addl $GD_MALLOC_BASE, %edx movl %esp, (%edx) #endif - - /* Align temporary global descriptor table to 16-byte boundary */ - andl $0xfffffff0, %esp + /* Store BIST */ + movl %eax, %edx + addl $GD_BIST, %edx + movl %ebp, (%edx) /* Set second parameter to setup_gdt */ movl %ecx, %edx |