diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2016-11-23 20:40:53 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-03-09 12:42:56 +0100 |
| commit | 26929bd71af443ae2a7080a6bd2bd9b8054a362c (patch) | |
| tree | a5483173de3f60b5571ac621627cbd223233400c /src/cpu | |
| parent | 171d1a5979800e3f8d3fc4c55fe08d50367f1dba (diff) | |
AGESA: Fix SSE regression and align stack early
When allowing use of SSE instructions, stack must be
aligned to 16 bytes. Adjust x86 entry to C accordingly,
by pushing values to maintain the alignment.
Fixes regression with new toolchain using GCC-6.3 and
ec0a393 console: Enable printk for ENV_LIBAGESA
For some builds, the above-mentioned commit emitted
SSE instruction 'andps (%esp),%xmm0' with incorrectly
aligned esp, raising exception and thus preventing boot.
Change-Id: Ief57a2ea053c7497d50903838310b7f7800bff26
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/18622
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/amd/agesa/cache_as_ram.inc | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/cpu/amd/agesa/cache_as_ram.inc b/src/cpu/amd/agesa/cache_as_ram.inc index 24db6001ea..c0a69ec74a 100644 --- a/src/cpu/amd/agesa/cache_as_ram.inc +++ b/src/cpu/amd/agesa/cache_as_ram.inc @@ -63,6 +63,9 @@ cache_as_ram_setup: AMD_ENABLE_STACK + /* Align the stack. */ + and $0xFFFFFFF0, %esp + #ifdef __x86_64__ /* switch to 64 bit long mode */ mov %esi, %ecx @@ -111,8 +114,6 @@ cache_as_ram_setup: /* Pass the BIST result */ cvtsd2si %xmm0, %edi - /* align the stack */ - and $0xFFFFFFF0, %esp .code64 call cache_as_ram_main @@ -126,6 +127,9 @@ cache_as_ram_setup: /* Restore the cpu_init_detected */ cvtsd2si %xmm1, %ebx + /* Must maintain 16-byte stack alignment here. */ + pushl $0x0 + pushl $0x0 pushl %ebx /* init detected */ pushl %edx /* bist */ call cache_as_ram_main |