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| author | Simon Glass <sjg@chromium.org> | 2015-07-31 09:31:28 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-08-05 08:42:40 -0600 |
| commit | 83ec7de3bc17dda42d681d3a015191a23c6f1f73 (patch) | |
| tree | cd4b5a8f05e665c77cdc3fa973f384ff57dfe6e1 /arch/x86/cpu/start.S | |
| parent | b0b403d954081520ba82fef24dee6486ffebe017 (diff) | |
| download | u-boot-imx-83ec7de3bc17dda42d681d3a015191a23c6f1f73.zip u-boot-imx-83ec7de3bc17dda42d681d3a015191a23c6f1f73.tar.gz u-boot-imx-83ec7de3bc17dda42d681d3a015191a23c6f1f73.tar.bz2 | |
x86: Tidy up global_data flags
These flags now overlap some global ones. Adjust the x86-specific flags to
avoid this. Since this requires a change to the start.S code, add a way for
tools to find the 32-bit cold reset entry point. Previously this was at a
fixed offset.
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 | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S index 7ef8b88..a0dec39 100644 --- a/arch/x86/cpu/start.S +++ b/arch/x86/cpu/start.S @@ -41,14 +41,18 @@ _x86boot_start: wbinvd /* Tell 32-bit code it is being entered from an in-RAM copy */ - movw $GD_FLG_WARM_BOOT, %bx + movl $GD_FLG_WARM_BOOT, %ebx jmp 1f + + /* Add a way for tools to discover the _start entry point */ + .align 4 + .long 0x12345678 _start: /* * This is the 32-bit cold-reset entry point, coming from start16. - * Set %bx to 0 to indicate this. + * Set %ebx to GD_FLG_COLD_BOOT to indicate this. */ - movw $GD_FLG_COLD_BOOT, %bx + movl $GD_FLG_COLD_BOOT, %ebx 1: /* Save BIST */ movl %eax, %ebp |