soc/intel/fsp1.1: Implement postcar stage

This moves FSP1.1 to use postcar stage to tear down CAR.
On platforms with USE_GENERIC_FSP_CAR_INC the FSP header is found
during the postcar stage so there is no need to push to save it
in CAR global variables.

On FSP1.1 platforms with an open source CAR implementation (Skylake,
even though it still runs the FSP-T), the
soc/intel/common/blocks/cpu/car/exit_car.S code tears down CAR.

This also uses common functions to set up the MTRR to use after
CAR is torn down.

Test: build/boot on google/celes (BSW) and google/chell (SKL)

Change-Id: I2330993842aae9c1365230f0c6bd8a2449dc73a5
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30686
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/src/drivers/intel/fsp1_1/include/fsp/car.h b/src/drivers/intel/fsp1_1/include/fsp/car.h
index 5214d73b29..0ae687a9d7 100644
--- a/src/drivers/intel/fsp1_1/include/fsp/car.h
+++ b/src/drivers/intel/fsp1_1/include/fsp/car.h
@@ -30,14 +30,12 @@ struct cache_as_ram_params {
 };
 
 /* Entry points from the cache-as-ram assembly code. */
-asmlinkage void *cache_as_ram_main(struct cache_as_ram_params *car_params);
-asmlinkage void after_cache_as_ram(void *chipset_context);
-asmlinkage void *romstage_c_entry(void);
+asmlinkage void cache_as_ram_main(struct cache_as_ram_params *car_params);
+asmlinkage void romstage_c_entry(void);
 /* Per stage calls from the above two functions. The void * return from
  * cache_as_ram_stage_main() is the stack pointer to use in RAM after
  * exiting cache-as-ram mode. */
-void *cache_as_ram_stage_main(FSP_INFO_HEADER *fih);
-void after_cache_as_ram_stage(void);
+void cache_as_ram_stage_main(FSP_INFO_HEADER *fih);
 
 /* Mainboard and SoC initialization prior to console. */
 void car_mainboard_pre_console_init(void);