diff options
Diffstat (limited to 'src/vendorcode/amd/agesa/f12/gcccar.inc')
| -rw-r--r-- | src/vendorcode/amd/agesa/f12/gcccar.inc | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/vendorcode/amd/agesa/f12/gcccar.inc b/src/vendorcode/amd/agesa/f12/gcccar.inc index 6a8045198d..6a81fc7add 100644 --- a/src/vendorcode/amd/agesa/f12/gcccar.inc +++ b/src/vendorcode/amd/agesa/f12/gcccar.inc @@ -611,6 +611,13 @@ fam12_enable_stack_hook_exit: * Return any family specific controls to their 'standard' * settings for using cache with main memory. * +* Note: Customized for coreboot: +* A wbinvd is used to send cache to memory. The existing stack is preserved +* at its original location and additional information is preserved (e.g. +* coreboot CAR globals, heap structures, etc.). This implementation should +* NOT be used with S3 resume IF the stack/cache area is not reserved and +* over system memory. +* * Inputs: * ESI - [31:24] flags; [15,8]= Node#; [7,0]= core# * Outputs: @@ -665,7 +672,14 @@ fam12_enable_stack_hook_exit: mov %ax, %bx # Save INVD -> WBINVD bit btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion _WRMSR - invd # Clear the cache tag RAMs + + #-------------------------------------------------------------------------- + # Send cache to memory. Preserve stack and coreboot CAR globals. + # This shouldn't be used with S3 resume IF the stack/cache area is + # not reserved and over system memory. + #-------------------------------------------------------------------------- + wbinvd + mov %bx, %ax # Restore INVD -> WBINVD bit _WRMSR |