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-rw-r--r--src/vendorcode/amd/agesa/f12/gcccar.inc20
-rw-r--r--src/vendorcode/amd/agesa/f14/gcccar.inc20
-rw-r--r--src/vendorcode/amd/agesa/f15tn/gcccar.inc33
-rw-r--r--src/vendorcode/amd/agesa/f16kb/gcccar.inc32
4 files changed, 8 insertions, 97 deletions
diff --git a/src/vendorcode/amd/agesa/f12/gcccar.inc b/src/vendorcode/amd/agesa/f12/gcccar.inc
index c08c9f1291..6a8045198d 100644
--- a/src/vendorcode/amd/agesa/f12/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f12/gcccar.inc
@@ -611,13 +611,6 @@ 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:
@@ -672,18 +665,7 @@ fam12_enable_stack_hook_exit:
mov %ax, %bx # Save INVD -> WBINVD bit
btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion
_WRMSR
-
- #--------------------------------------------------------------------------
- # 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.
- #--------------------------------------------------------------------------
-#if !IS_ENABLED(CONFIG_POSTCAR_STAGE)
- wbinvd
-#else
- invd
-#endif
-
+ invd # Clear the cache tag RAMs
mov %bx, %ax # Restore INVD -> WBINVD bit
_WRMSR
diff --git a/src/vendorcode/amd/agesa/f14/gcccar.inc b/src/vendorcode/amd/agesa/f14/gcccar.inc
index 678990f5b6..95dd74d6cb 100644
--- a/src/vendorcode/amd/agesa/f14/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f14/gcccar.inc
@@ -770,13 +770,6 @@ fam14_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:
@@ -820,18 +813,7 @@ fam14_enable_stack_hook_exit:
_RDMSR
btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion
_WRMSR
-
- #--------------------------------------------------------------------------
- # 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.
- #--------------------------------------------------------------------------
-#if !IS_ENABLED(CONFIG_POSTCAR_STAGE)
- wbinvd
-#else
- invd
-#endif
-
+ invd # Clear the cache tag RAMs
bts $INVD_WBINVD, %eax # Turn on Conversion of INVD to WBINVD
_WRMSR
diff --git a/src/vendorcode/amd/agesa/f15tn/gcccar.inc b/src/vendorcode/amd/agesa/f15tn/gcccar.inc
index 8e15503551..b13e02aff7 100644
--- a/src/vendorcode/amd/agesa/f15tn/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f15tn/gcccar.inc
@@ -1033,13 +1033,6 @@ fam15_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:
@@ -1257,18 +1250,7 @@ fam15_disable_stack_remote_read_exit:
_RDMSR
btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion
_WRMSR
-
- #--------------------------------------------------------------------------
- # 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.
- #--------------------------------------------------------------------------
-#if !IS_ENABLED(CONFIG_POSTCAR_STAGE)
- wbinvd
-#else
- invd
-#endif
-
+ invd # Clear the cache tag RAMs
#.if (bh == 01h) || (bh == 03h) ; Is this TN or KM?
cmp $01, %bh
jz 4f
@@ -1901,17 +1883,8 @@ ClearTheStack: # Stack base is in SS, stack pointer is
.endm
/*****************************************************************************
-* AMD_DISABLE_STACK: Implementation is modified for coreboot from
-* the original AMD intent. A WBINVD is used in the HOOK
-* to send dirty cache contents to DRAM backing before
-* disabling cache-as-ram. This is not safe for S3 resume.
-*
-* todo:
-* * rework PI/AGESA source to set DRAM to UC to send
-* writes directly to memory
-* * move DCACHE_BASE or use postcar stage for teardown
-* to eliminate car_migrated problem that will occur
-* after wbinvd is changed back to invd
+* AMD_DISABLE_STACK: Destroy the stack inside the cache. This routine
+* should only be executed on the BSP
*
* In:
* none
diff --git a/src/vendorcode/amd/agesa/f16kb/gcccar.inc b/src/vendorcode/amd/agesa/f16kb/gcccar.inc
index 8ad4d1ddc4..c818d970bf 100644
--- a/src/vendorcode/amd/agesa/f16kb/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f16kb/gcccar.inc
@@ -269,13 +269,6 @@ MSR_MASK = ((1 << MTRR_DEF_TYPE_EN)+(1 << MTRR_DEF_TYPE_FIX_EN))
* Read family specific values to determine the node and core
* numbers for the core executing this code.
*
-* 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:
* none
* Outputs:
@@ -609,17 +602,7 @@ fam16_disable_stack_remote_read_exit:
_RDMSR
btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion
_WRMSR
-
- #--------------------------------------------------------------------------
- # 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.
- #--------------------------------------------------------------------------
-#if !IS_ENABLED(CONFIG_POSTCAR_STAGE)
- wbinvd
-#else
- invd
-#endif
+ invd # Clear the cache tag RAMs
#Do Standard Family 16 work
mov $HWCR, %ecx # MSR:C001_0015h
@@ -1264,17 +1247,8 @@ ClearTheStack: # Stack base is in SS, stack pointer is
.endm
/*****************************************************************************
-* AMD_DISABLE_STACK: Implementation is modified for coreboot from
-* the original AMD intent. A WBINVD is used in the HOOK
-* to send dirty cache contents to DRAM backing before
-* disabling cache-as-ram. This is not safe for S3 resume.
-*
-* todo:
-* * rework PI/AGESA source to set DRAM to UC to send
-* writes directly to memory
-* * move DCACHE_BASE or use postcar stage for teardown
-* to eliminate car_migrated problem that will occur
-* after wbinvd is changed back to invd
+* AMD_DISABLE_STACK: Destroy the stack inside the cache. This routine
+* should only be executed on the BSP
*
* In:
* none