{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>

src/drivers/intel/fsp1_1/Makefile.inc

@@ -21,6 +21,7 @@ verstage-y += fsp_util.c
 verstage-$(CONFIG_SEPARATE_VERSTAGE) += verstage.c
 
 bootblock-y += bootblock.c
+bootblock-$(CONFIG_USE_GENERIC_FSP_CAR_INC) += cache_as_ram.S
 bootblock-y += fsp_util.c
 
 romstage-y += car.c
@@ -42,8 +43,6 @@ ramstage-$(CONFIG_MMA) += mma_core.c
 
 CPPFLAGS_common += -Isrc/drivers/intel/fsp1_1/include
 
-cpu_incs-$(CONFIG_USE_GENERIC_FSP_CAR_INC) += $(src)/drivers/intel/fsp1_1/cache_as_ram.inc
-
 postcar-y += stage_cache.c
 ifneq ($(CONFIG_SKIP_FSP_CAR),y)
 postcar-y += temp_ram_exit.c

src/drivers/intel/fsp1_1/cache_as_ram.S

@@ -5,6 +5,7 @@
  * Copyright (C) 2007-2008 coresystems GmbH
  * Copyright (C) 2013-2014 Sage Electronic Engineering, LLC.
  * Copyright (C) 2015 Intel Corp.
+ * Copyright (C) 2018-2019 Eltan B.V.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,6 +17,8 @@
  * GNU General Public License for more details.
  */
 
+#include <cpu/x86/post_code.h>
+
 /*
  * Replacement for cache_as_ram.inc when using the FSP binary.  This code
  * locates the FSP binary, initializes the cache as RAM and performs the
@@ -24,8 +27,10 @@
  * performs the final stage of initialization.
  */
 
-/* I/O delay between post codes on failure */
-#define LHLT_DELAY	0x50000
+#define LHLT_DELAY	0x50000	/* I/O delay between post codes on failure */
+
+.global	bootblock_pre_c_entry
+bootblock_pre_c_entry:
 	/*
 	 * Per FSP1.1 specs, following registers are preserved:
 	 * EBX, EDI, ESI, EBP, MM0, MM1
@@ -129,10 +134,9 @@ CAR_init_done:
 	/* Need to align stack to 16 bytes at call instruction. Account for
 	the pushes below. */
 	andl	$0xfffffff0, %esp
-	subl	$4, %esp
+	subl	$8, %esp
 
-	/* Push BIST and initial timestamp on the stack */
-	pushl	%ebx	/* bist */
+	/* Push initial timestamp on the stack */
 	movd	%mm1, %eax
 	pushl	%eax	/* tsc[63:32] */
 	movd	%mm0, %eax
@@ -141,12 +145,10 @@ CAR_init_done:
 before_romstage:
 	post_code(0x2A)
 
-	/* Call bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist)
-	   in cpu/intel/car/romstage.c */
-	call	bootblock_c_entry_bist
+	/* Call bootblock_c_entry(uint64_t base_timestamp) */
+	call	bootblock_c_entry
 
-	movb	$0x69, %ah
-	jmp	.Lhlt
+	/* Never reached */
 
 halt1:
 	/*

src/drivers/intel/fsp1_1/car.c

@@ -101,18 +101,6 @@ void mainboard_romstage_entry(unsigned long bist)
 	 * is still enabled. We can directly access work buffer here. */
 	struct prog fsp = PROG_INIT(PROG_REFCODE, "fsp.bin");
 
-	if (!CONFIG(C_ENVIRONMENT_BOOTBLOCK)) {
-		/* Call into pre-console init code then initialize console. */
-		car_soc_pre_console_init();
-		car_mainboard_pre_console_init();
-		console_init();
-
-		display_mtrrs();
-
-		car_soc_post_console_init();
-		car_mainboard_post_console_init();
-	}
-
 	if (prog_locate(&fsp))
 		die_with_post_code(POST_INVALID_CBFS, "Unable to locate fsp.bin");
 
@@ -125,19 +113,3 @@ void mainboard_romstage_entry(unsigned long bist)
 
 	cache_as_ram_stage_main(fih);
 }
-
-void __weak car_mainboard_pre_console_init(void)
-{
-}
-
-void __weak car_soc_pre_console_init(void)
-{
-}
-
-void __weak car_mainboard_post_console_init(void)
-{
-}
-
-void __weak car_soc_post_console_init(void)
-{
-}

src/drivers/intel/fsp1_1/include/fsp/car.h

@@ -24,12 +24,4 @@
  * 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);
-
-/* Mainboard and SoC initialization prior to console. */
-void car_mainboard_pre_console_init(void);
-void car_soc_pre_console_init(void);
-/* Mainboard and SoC initialization post console initialization. */
-void car_mainboard_post_console_init(void);
-void car_soc_post_console_init(void);
-
 #endif