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>

src/cpu/qemu-x86/Kconfig

@@ -21,3 +21,4 @@ config CPU_QEMU_X86
 	select ARCH_RAMSTAGE_X86_32
 	select SMP
 	select UDELAY_TSC
+	select C_ENVIRONMENT_BOOTBLOCK

src/cpu/qemu-x86/Makefile.inc

@@ -12,6 +12,8 @@
 ## GNU General Public License for more details.
 ##
 
+bootblock-y += cache_as_ram_bootblock.S
+bootblock-y += bootblock.c
 ramstage-y += qemu.c
 subdirs-y += ../x86/mtrr
 subdirs-y += ../x86/lapic

src/cpu/qemu-x86/bootblock.c

@@ -0,0 +1,35 @@
+/*
+ * 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
+ * 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 <bootblock_common.h>
+#include <console/console.h>
+#include <cpu/x86/bist.h>
+
+asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist);
+
+asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist)
+{
+	post_code(0x05);
+
+	/* Halt if there was a built in self test failure */
+	if (bist) {
+		console_init();
+		report_bist_failure(bist);
+	}
+
+	/* Call lib/bootblock.c main */
+	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+}

src/cpu/qemu-x86/cache_as_ram_bootblock.S

@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
  * Copyright (C) 2007-2008 coresystems GmbH
+ * 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
@@ -14,14 +15,11 @@
  * 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
+.global bootblock_pre_c_entry
+bootblock_pre_c_entry:
 
 cache_as_ram:
 	post_code(0x20)
@@ -31,33 +29,34 @@ cache_as_ram:
 	 */
 
 	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
+	movl $_car_stack_end, %esp
+	/* Align the stack and keep aligned for call to bootblock_c_entry() */
+	and	$0xfffffff0, %esp
+	sub	$12, %esp
+
+	/* Clear the cache memory region. This will also clear CAR GLOBAL */
+	movl	$_car_region_start, %esi
+	movl	%esi, %edi
+	movl	$_car_region_end, %ecx
+	sub	$_car_region_start, %ecx
+	shr	$2, %ecx
+	xorl	%eax, %eax
+	rep	stosl
+
+	/* Restore the BIST result and timestamps. */
+	movd	%mm0, %ebx
+	movd	%mm1, %eax
+	movd	%mm2, %edx
+
+	pushl	%ebx
+	pushl	%edx
 	pushl	%eax
 
-before_romstage:
+before_c_entry:
 	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
-
+	call	bootblock_c_entry_bist
+	/* Never returns */
 .Lhlt:
 	post_code(POST_DEAD_CODE)
 	hlt

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
-
-config DCACHE_RAM_SIZE
 	hex
 	default 0x10000
 
+# Memory at 0xa0000 decodes to VGA
+config DCACHE_RAM_SIZE
+	hex
+	default 0x90000
+
+config C_ENV_BOOTBLOCK_SIZE
+	hex
+	default 0x4000
+
 endif # BOARD_EMULATION_QEMU_X86_I440FX

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

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_recovery(0);
 
-	cbmem_was_initted = !cbmem_recovery(0);
-
-	timestamp_init(timestamp_get());
 	timestamp_add_now(TS_START_ROMSTAGE);
 
-	/* Emulation uses fixed low stack during ramstage. */
-	return NULL;
+	run_ramstage();
 }

src/mainboard/emulation/qemu-q35/Kconfig

@@ -11,6 +11,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select BOARD_ROMSIZE_KB_2048
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_FORCE_NATIVE_VGA_INIT
+	select BOOTBLOCK_CONSOLE
 
 config MAINBOARD_DIR
 	string
@@ -28,17 +29,24 @@ config MMCONF_BASE_ADDRESS
 	hex
 	default 0xb0000000
 
+# 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
 
 # Do not show IFD/blob options since QEMU doesn't care
 config HAVE_INTEL_FIRMWARE
 	bool
 	default n
 
+config C_ENV_BOOTBLOCK_SIZE
+	hex
+	default 0x4000
+
 endif # BOARD_EMULATION_QEMU_X86_Q35

src/mainboard/emulation/qemu-q35/Makefile.inc

@@ -1,5 +1,5 @@
-cpu_incs-y += $(src)/mainboard/emulation/qemu-i440fx/cache_as_ram.inc
 ramstage-y += ../qemu-i440fx/northbridge.c
 ramstage-y += ../qemu-i440fx/memory.c
 ramstage-y += ../qemu-i440fx/fw_cfg.c
 romstage-y += ../qemu-i440fx/memory.c
+bootblock-y += bootblock.c

src/mainboard/emulation/qemu-q35/bootblock.c

@@ -12,6 +12,8 @@
  */
 
 #include <arch/io.h>
+#include <bootblock_common.h>
+#include <southbridge/intel/i82801ix/i82801ix.h>
 
 /* Just define these here, there is no gm35.h file to include. */
 #define D0F0_PCIEXBAR_LO 0x60
@@ -39,7 +41,29 @@ static void bootblock_northbridge_init(void)
 	pci_io_write_config32(PCI_DEV(0,0,0), D0F0_PCIEXBAR_LO, reg);
 }
 
-static void bootblock_mainboard_init(void)
+static void enable_spi_prefetch(void)
+{
+	u8 reg8;
+	pci_devfn_t dev;
+
+	dev = PCI_DEV(0, 0x1f, 0);
+
+	reg8 = pci_read_config8(dev, 0xdc);
+	reg8 &= ~(3 << 2);
+	reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
+	pci_write_config8(dev, 0xdc, reg8);
+}
+
+static void bootblock_southbridge_init(void)
+{
+	enable_spi_prefetch();
+
+	/* Enable RCBA */
+	pci_write_config32(PCI_DEV(0, 0x1f, 0), D31F0_RCBA,
+			(uintptr_t)DEFAULT_RCBA | 1);
+}
+
+void bootblock_soc_init(void)
 {
 	bootblock_northbridge_init();
 	bootblock_southbridge_init();

src/mainboard/emulation/qemu-q35/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
@@ -16,32 +17,19 @@
 #include <stdint.h>
 #include <cbmem.h>
 #include <console/console.h>
-#include <southbridge/intel/i82801ix/i82801ix.h>
-#include <cpu/x86/bist.h>
 #include <cpu/intel/romstage.h>
 #include <timestamp.h>
-#include <delay.h>
-#include <cpu/x86/lapic.h>
+#include <southbridge/intel/i82801ix/i82801ix.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);
-
 	i82801ix_early_init();
 	console_init();
 
-	/* Halt if there was a built in self test failure */
-	report_bist_failure(bist);
+	cbmem_recovery(0);
 
-	cbmem_was_initted = !cbmem_recovery(0);
-
-	timestamp_init(timestamp_get());
 	timestamp_add_now(TS_START_ROMSTAGE);
 
-	/* Emulation uses fixed low stack during ramstage. */
-	return NULL;
+	run_ramstage();
 }