diff options
| author | Bruce Griffith <bruce.griffith@se-eng.com> | 2013-08-12 01:53:13 -0600 |
|---|---|---|
| committer | Bruce Griffith <Bruce.Griffith@se-eng.com> | 2013-08-16 11:20:05 +0200 |
| commit | 59c3a0615498b6fa79bb4152deab7e837f7ed389 (patch) | |
| tree | a8c334fcabcc540ea661cfd34ff40a8d5809f286 /src/cpu/amd | |
| parent | 540d8eaac975e1036ebc269df89316c705efbd3c (diff) | |
AMD AGESA: Remove INVD instruction when transitioning from CAR
The AMD AGESA function to move the stack from cache-as-ram to
actual RAM doesn't need any help. The current implementation has
an INVD instruction just before cache-as-RAM is torn down. It isn't
needed for Trinity processors and makes Kabini boot unreliable.
Change-Id: Ibe9e4105eee032471ccbb2d537471d5fa5847d22
Signed-off-by: Bruce Griffith <bruce.griffith@se-eng.com>
Reviewed-on: http://review.coreboot.org/3852
Tested-by: build bot (Jenkins)
Reviewed-by: Siyuan Wang <wangsiyuanbuaa@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Diffstat (limited to 'src/cpu/amd')
| -rwxr-xr-x | src/cpu/amd/agesa/cache_as_ram.inc | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/cpu/amd/agesa/cache_as_ram.inc b/src/cpu/amd/agesa/cache_as_ram.inc index c645a1e517..449cf693f2 100755 --- a/src/cpu/amd/agesa/cache_as_ram.inc +++ b/src/cpu/amd/agesa/cache_as_ram.inc @@ -85,6 +85,7 @@ stop: disable_cache_as_ram: /* Save return stack */ + movd 0(%esp), %xmm1 movd %esp, %xmm0 /* Disable cache */ @@ -92,8 +93,6 @@ disable_cache_as_ram: orl $CR0_CacheDisable, %eax movl %eax, %cr0 - invd - AMD_DISABLE_STACK /* enable cache */ @@ -103,7 +102,9 @@ disable_cache_as_ram: xorl %eax, %eax /* Restore the return stack */ + wbinvd movd %xmm0, %esp + movd %xmm1, (%esp) ret cache_as_ram_setup_out: |