mb/emulation/qemu-i440fx|q35: Switch to C_ENVIRONMENT_BOOTBLOCK

Useful for testing stuff in C_ENVIRONMENT_BOOTBLOCK, like
VBOOT with separate verstage.

Changes:
* Use symbols to set up CAR and STACK
* Zero CAR area
* Move BIST failure checking to cpu folder
* Rename functions where necessary

Tested:
* qemu-2.11.2 machine pc
* qemu-2.11.2 machine q35

Test result:
* BIST error reporting is still working.
* Console starts in bootblock
* SeaBios 1.11.2 as payload is still working

Change-Id: Ibf341002c36d868b9b44c8b37381fa78ae5c4381
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/29578
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

4 files changed, 15 insertions, 84 deletions

diff --git a/src/mainboard/emulation/qemu-i440fx/Kconfig b/src/mainboard/emulation/qemu-i440fx/Kconfig
index fc56ab6fa3..2435729ced 100644
--- a/src/mainboard/emulation/qemu-i440fx/Kconfig
+++ b/src/mainboard/emulation/qemu-i440fx/Kconfig
@@ -12,6 +12,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select BOARD_ROMSIZE_KB_256
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_FORCE_NATIVE_VGA_INIT
+	select BOOTBLOCK_CONSOLE
 
 config MAINBOARD_DIR
 	string
@@ -25,12 +26,19 @@ config IRQ_SLOT_COUNT
 	int
 	default 6
 
+# Skip the first 64KiB as coreboot table pointer is installed
+# at address 0
 config DCACHE_RAM_BASE
 	hex
-	default 0xd0000
+	default 0x10000
 
+# Memory at 0xa0000 decodes to VGA
 config DCACHE_RAM_SIZE
 	hex
-	default 0x10000
+	default 0x90000
+
+config C_ENV_BOOTBLOCK_SIZE
+	hex
+	default 0x4000
 
 endif # BOARD_EMULATION_QEMU_X86_I440FX
diff --git a/src/mainboard/emulation/qemu-i440fx/Makefile.inc b/src/mainboard/emulation/qemu-i440fx/Makefile.inc
index ecc049ea5c..9e2880a6a0 100644
--- a/src/mainboard/emulation/qemu-i440fx/Makefile.inc
+++ b/src/mainboard/emulation/qemu-i440fx/Makefile.inc
@@ -1,4 +1,3 @@
-cpu_incs-y += $(src)/mainboard/emulation/qemu-i440fx/cache_as_ram.inc
 ramstage-y += northbridge.c
 ramstage-y += fw_cfg.c
 romstage-y += memory.c
diff --git a/src/mainboard/emulation/qemu-i440fx/cache_as_ram.inc b/src/mainboard/emulation/qemu-i440fx/cache_as_ram.inc
deleted file mode 100644
index d36341c78b..0000000000
--- a/src/mainboard/emulation/qemu-i440fx/cache_as_ram.inc
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
- * Copyright (C) 2007-2008 coresystems GmbH
- *
- * 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
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <cpu/x86/mtrr.h>
-#include <cpu/x86/cache.h>
-#include <cpu/x86/post_code.h>
-
-#define CPU_PHYSMASK_HI  (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1)
-
-	/* Save the BIST result. */
-	movl	%eax, %ebp
-
-cache_as_ram:
-	post_code(0x20)
-	/*
-	 * Nothing to do here on qemu, RAM works just fine without any
-	 * initialization.
-	 */
-
-	post_code(0x21)
-	/*
-	 * Set up the stack pointer, use top of real mode (640k) memory.
-	 * This value also keeps the copy_and_run stack out of the way
-	 * of big ramstages. The ramstage will load its own %esp so
-	 * there is no harm in using this value.
-	 */
-	movl	$0xa0000, %eax
-	movl	%eax, %esp
-
-	/* Restore the BIST result. */
-	movl	%ebp, %eax
-	movl	%esp, %ebp
-	pushl	%eax
-
-before_romstage:
-	post_code(0x29)
-	/* Call romstage.c main function. */
-	call	romstage_main
-
-	post_code(0x30)
-
-__main:
-	post_code(POST_PREPARE_RAMSTAGE)
-	cld			/* Clear direction flag. */
-
-	call	copy_and_run
-
-.Lhlt:
-	post_code(POST_DEAD_CODE)
-	hlt
-	jmp	.Lhlt
diff --git a/src/mainboard/emulation/qemu-i440fx/romstage.c b/src/mainboard/emulation/qemu-i440fx/romstage.c
index 953062163d..e31394c282 100644
--- a/src/mainboard/emulation/qemu-i440fx/romstage.c
+++ b/src/mainboard/emulation/qemu-i440fx/romstage.c
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2004 Stefan Reinauer
+ * Copyright (C) 2018 Patrick Rudolph <siro@das-labor.org>
  *
  * 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
@@ -16,30 +17,17 @@
 #include <stdint.h>
 #include <cbmem.h>
 #include <console/console.h>
-#include <cpu/x86/bist.h>
 #include <cpu/intel/romstage.h>
 #include <timestamp.h>
-#include <delay.h>
-#include <cpu/x86/lapic.h>
+#include <program_loading.h>
 
-
-void *asmlinkage romstage_main(unsigned long bist)
+asmlinkage void car_stage_entry(void)
 {
-	int cbmem_was_initted;
-
-	/* init_timer(); */
-	post_code(0x05);
-
 	console_init();
 
-	/* Halt if there was a built in self test failure */
-	report_bist_failure(bist);
-
-	cbmem_was_initted = !cbmem_recovery(0);
+	cbmem_recovery(0);
 
-	timestamp_init(timestamp_get());
 	timestamp_add_now(TS_START_ROMSTAGE);
 
-	/* Emulation uses fixed low stack during ramstage. */
-	return NULL;
+	run_ramstage();
 }