{drivers,soc/intel/braswell}: Implement C_ENVIRONMENT_BOOTBLOCK support

No C_ENVIRONMENT_BOOTBLOCK support for Braswell is available.
Enable support and add required files for the Braswell Bootblock in C.

The next changes are made support C_ENVIRONMENT_BOOTBLOCK:
- Add car_stage_entry() function bootblock-c_entry() functions.
- Specify config DCACHE_BSP_STACK_SIZE and C_ENV_BOOTBLOCK_SIZE.
- Add bootblock_c_entry().
- Move init from car_soc_XXX_console_init() to bootblock_soc_XXX_Init()

Removed the unused cache_as_ram_main() and weak car_XXX_XXX_console_init()

BUG=NA
TEST=Booting Embedded Linux on Facebook FBG-1701
     Building Google Banos

Change-Id: Iab48ad72f1514c93f20d70db5ef4fd8fa2383e8c
Signed-off-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/29662
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 12 insertions, 4 deletions

diff --git a/src/soc/intel/braswell/Kconfig b/src/soc/intel/braswell/Kconfig
index ed5c9728a3..920179f834 100644
--- a/src/soc/intel/braswell/Kconfig
+++ b/src/soc/intel/braswell/Kconfig
@@ -51,15 +51,23 @@ config CPU_SPECIFIC_OPTIONS
 	select INTEL_GMA_SWSMISCI
 	select CPU_INTEL_COMMON
 	select SOUTHBRIDGE_INTEL_COMMON_SMBUS
+	select C_ENVIRONMENT_BOOTBLOCK
+
+config DCACHE_BSP_STACK_SIZE
+	hex
+	default 0x2000
+	help
+	  The amount of anticipated stack usage in CAR by bootblock and
+	  other stages.
+
+config C_ENV_BOOTBLOCK_SIZE
+	hex
+	default 0x8000
 
 config VBOOT
 	select VBOOT_MUST_REQUEST_DISPLAY
 	select VBOOT_STARTS_IN_ROMSTAGE
 
-config BOOTBLOCK_CPU_INIT
-	string
-	default "soc/intel/braswell/bootblock/bootblock.c"
-
 config MMCONF_BASE_ADDRESS
 	hex
 	default 0xe0000000