Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/44406 )
Change subject: drivers/intel/fsp2_0: don't select FSP_USES_CB_STACK on FSP 2.0 platform ......................................................................
drivers/intel/fsp2_0: don't select FSP_USES_CB_STACK on FSP 2.0 platform
soc/amd/picasso selected FSP_USES_CB_STACK even though it is FSP 2.0 based, so it doesn't reuse coreboot's stack, but sets up its own stack. In contrast to all other FSP 2.0 based platforms, this stack isn't in the CAR region, since AMD Picasso doesn't support CAR and the DRAM is already available when the x86 cores are released from reset. Selecting FSP_USES_CB_STACK ended up doing the right thing, but is semantically wrong. Instead of wrongly selecting FSP_USES_CB_STACK in soc/amd/picasso we take the corresponding code path if ENV_CACHE_AS_RAM is false which is only the case for non-CAR platforms.
BUG=b:155501050 TEST=Timeless build results in an identical binary for amd/mandolin, asrock/h110m-dvs and intel/coffeelake_rvp11 which cover all 3 cases here.
Change-Id: Icd0ff8e17a535e2c247793b64f4b0565887183d8 Signed-off-by: Felix Held felix-coreboot@felixheld.de Reviewed-on: https://review.coreboot.org/c/coreboot/+/44406 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Aaron Durbin adurbin@chromium.org Reviewed-by: Furquan Shaikh furquan@google.com Reviewed-by: Marshall Dawson marshalldawson3rd@gmail.com --- M src/drivers/intel/fsp2_0/Kconfig M src/drivers/intel/fsp2_0/memory_init.c M src/soc/amd/picasso/Kconfig 3 files changed, 9 insertions(+), 8 deletions(-)
Approvals: build bot (Jenkins): Verified Aaron Durbin: Looks good to me, approved Furquan Shaikh: Looks good to me, approved Marshall Dawson: Looks good to me, approved
diff --git a/src/drivers/intel/fsp2_0/Kconfig b/src/drivers/intel/fsp2_0/Kconfig index 3caa04a..00bfd67 100644 --- a/src/drivers/intel/fsp2_0/Kconfig +++ b/src/drivers/intel/fsp2_0/Kconfig @@ -132,12 +132,14 @@
config FSP_TEMP_RAM_SIZE hex - depends on FSP_USES_CB_STACK help - The amount of anticipated heap usage in CAR by FSP to setup HOB. - This configuration is applicable for FSP specification using shared - stack with coreboot/bootloader. - Sync this value with Platform FSP integration guide recommendation. + The amount of memory coreboot reserves for the FSP to use. In the + case of FSP 2.1 and newer that share the stack with coreboot instead + of having its own stack, this is the amount of anticipated heap usage + in CAR by FSP to setup HOB and needs to be the recommended value from + the Platform FSP integration guide. In the case of the FSP having its + own stack that will be placed in DRAM and not in CAR, this is the + amount of memory the FSP needs for its stack and heap.
config FSP2_0_USES_TPM_MRC_HASH bool diff --git a/src/drivers/intel/fsp2_0/memory_init.c b/src/drivers/intel/fsp2_0/memory_init.c index 7f5d389..57a0520 100644 --- a/src/drivers/intel/fsp2_0/memory_init.c +++ b/src/drivers/intel/fsp2_0/memory_init.c @@ -184,8 +184,9 @@ * top and does not reinitialize stack pointer. The parameters passed * as StackBase and StackSize are actually for temporary RAM and HOBs * and are not related to FSP stack at all. + * Non-CAR FSP 2.0 platforms pass a DRAM location for the FSP stack. */ - if (CONFIG(FSP_USES_CB_STACK)) { + if (CONFIG(FSP_USES_CB_STACK) || !ENV_CACHE_AS_RAM) { arch_upd->StackBase = temp_ram; arch_upd->StackSize = sizeof(temp_ram); } else if (setup_fsp_stack_frame(arch_upd, memmap)) { diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig index 8001b7a..1b83000 100644 --- a/src/soc/amd/picasso/Kconfig +++ b/src/soc/amd/picasso/Kconfig @@ -53,7 +53,6 @@ select PLATFORM_USES_FSP2_0 select FSP_COMPRESS_FSP_M_LZMA select FSP_COMPRESS_FSP_S_LZMA - select FSP_USES_CB_STACK select UDK_2017_BINDING select HAVE_CF9_RESET select SUPPORT_CPU_UCODE_IN_CBFS @@ -377,7 +376,6 @@
config FSP_TEMP_RAM_SIZE hex - depends on FSP_USES_CB_STACK default 0x40000 help The amount of coreboot-allocated heap and stack usage by the FSP.