ARM: Generalize armv7 as arm.

There are ARM systems which are essentially heterogeneous multicores where
some cores implement a different ARM architecture version than other cores. A
specific example is the tegra124 which boots on an ARMv4 coprocessor while
most code, including most of the firmware, runs on the main ARMv7 core. To
support SOCs like this, the plan is to generalize the ARM architecture so that
all versions are available, and an SOC/CPU can then select what architecture
variant should be used for each component of the firmware; bootblock,
romstage, and ramstage.

Old-Change-Id: I22e048c3bc72bd56371e14200942e436c1e312c2
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/171338
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 8423a41529da0ff67fb9873be1e2beb30b09ae2d)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>

ARM: Split out ARMv7 code and make it possible to have other arch versions.

We don't always want to use ARMv7 code when building for ARM, so we should
separate out the ARMv7 code so it can be excluded, and also make it possible
to include code for some other version of the architecture instead, all per
build component for cases where we need more than one architecture version
at a time.

The tegra124 bootblock will ultimately need to be ARMv4, but until we have
some ARMv4 code to switch over to we can leave it set to ARMv7.

Old-Change-Id: Ia982c91057fac9c252397b7c866224f103761cc7
Reviewed-on: https://chromium-review.googlesource.com/171400
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 799514e6060aa97acdcf081b5c48f965be134483)

Squashed two related patches for splitting ARM support into general
ARM support and ARMv7 specific pieces.

Change-Id: Ic6511507953a2223c87c55f90252c4a4e1dd6010
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6782
Tested-by: build bot (Jenkins)

Makefile

@@ -117,7 +117,7 @@ else
 include $(HAVE_DOTCONFIG)
 
 ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-# FIXME: armv7/aarch64 won't build right now
+# FIXME: arm/aarch64 won't build right now
 CFLAGS_x86_32 = -no-integrated-as -Qunused-arguments -target i386-elf -m32
 CC_x86_32:=clang
 
@@ -130,8 +130,8 @@ endif
 #CFLAGS_x86_32 += -mno-sse
 #endif
 
-CFLAGS_armv7 = -no-integrated-as -Qunused-arguments -target armv7-eabi -ccc-gcc-name $(CC_armv7)
-CC_armv7:=clang
+CFLAGS_arm = -no-integrated-as -Qunused-arguments -target arm-eabi -ccc-gcc-name $(CC_arm)
+CC_arm:=clang
 
 CFLAGS_aarch64 = -no-integrated-as -Qunused-arguments -target aarch64-eabi -ccc-gcc-name $(CC_aarch64)
 CC_aarch64:=clang

Makefile.inc

@@ -68,7 +68,7 @@ PHONY+= clean-abuild coreboot lint lint-stable build-dirs
 subdirs-y := src/lib src/console src/device src/ec src/southbridge src/soc
 subdirs-y += src/northbridge src/superio src/drivers src/cpu src/vendorcode
 subdirs-y += util/cbfstool util/sconfig util/nvramtool
-subdirs-y += src/arch/armv7 src/arch/x86
+subdirs-y += src/arch/arm src/arch/x86
 subdirs-y += src/mainboard/$(MAINBOARDDIR)
 
 subdirs-y += site-local
@@ -550,7 +550,7 @@ cbfs-files-$(CONFIG_BOOTSPLASH) += bootsplash.jpg
 bootsplash.jpg-file := $(call strip_quotes,$(CONFIG_BOOTSPLASH_FILE))
 bootsplash.jpg-type := bootsplash
 
-ifeq ($(CONFIG_ARCH_ROMSTAGE_ARMV7),y)
+ifeq ($(CONFIG_ARCH_ROMSTAGE_ARM),y)
 ROMSTAGE_ELF := romstage.elf
 endif
 ifeq ($(CONFIG_ARCH_ROMSTAGE_X86_32),y)

payloads/libpayload/Config.in

@@ -67,10 +67,10 @@ choice
         prompt "Target Architecture"
         default ARCH_X86
 
-config ARCH_ARMV7
-        bool "ARMv7"
+config ARCH_ARM
+        bool "ARM"
         help
-          Support the x86 architecture
+          Support the ARM architecture
 
 config ARCH_X86
         bool "x86"

payloads/libpayload/Makefile

@@ -91,14 +91,14 @@ include util/kconfig/Makefile
 
 include $(HAVE_DOTCONFIG)
 
-ARCHDIR-$(CONFIG_LP_ARCH_ARMV7)   := armv7
+ARCHDIR-$(CONFIG_LP_ARCH_ARM)     := arm
 ARCHDIR-$(CONFIG_LP_ARCH_X86)     := x86
 
 ARCH-y := $(ARCHDIR-y)
 
 # If architecture folder name is different from GCC binutils architecture name,
 # override here.
-ARCH-$(CONFIG_LP_ARCH_ARMV7)   := armv7
+ARCH-$(CONFIG_LP_ARCH_ARM)     := arm
 ARCH-$(CONFIG_LP_ARCH_X86)     := i386
 
 CC := $(CC_$(ARCH-y))

payloads/libpayload/Makefile.inc

@@ -31,7 +31,7 @@
 
 export KERNELVERSION      := 0.2.0
 
-ARCHDIR-$(CONFIG_LP_ARCH_ARMV7)   := armv7
+ARCHDIR-$(CONFIG_LP_ARCH_ARM)     := arm
 ARCHDIR-$(CONFIG_LP_ARCH_X86)     := x86
 DESTDIR ?= install
 

payloads/libpayload/arch/Config.in

@@ -27,5 +27,5 @@
 ## SUCH DAMAGE.
 ##
 
-source "arch/armv7/Config.in"
+source "arch/arm/Config.in"
 source "arch/x86/Config.in"

payloads/libpayload/arch/arm/Config.in

@@ -27,7 +27,7 @@
 ## SUCH DAMAGE.
 ##
 
-if ARCH_ARMV7
+if ARCH_ARM
 
 config ARCH_SPECIFIC_OPTIONS # dummy
 	def_bool y

payloads/libpayload/arch/arm/cache.c

@@ -267,7 +267,6 @@ void dcache_mmu_disable(void)
 	write_sctlr(sctlr);
 }
 
-
 void dcache_mmu_enable(void)
 {
 	uint32_t sctlr;
@@ -278,7 +277,7 @@ void dcache_mmu_enable(void)
 	write_sctlr(sctlr);
 }
 
-void armv7_invalidate_caches(void)
+void arm_invalidate_caches(void)
 {
 	uint32_t clidr;
 	int level;

payloads/libpayload/arch/arm/timer.c

@@ -28,8 +28,8 @@
  */
 
 /**
- * @file armv7/timer.c
- * ARMv7 specific timer routines
+ * @file arm/timer.c
+ * ARM specific timer routines
  */
 
 #include <libpayload.h>

payloads/libpayload/bin/lpgcc

@@ -68,11 +68,11 @@ else
 	exit 1
 fi
 
-if [ "$CONFIG_LP_ARCH_ARMV7" = "y" ]; then
-  _ARCHINCDIR=$_INCDIR/armv7
-  _ARCHLIBDIR=$_LIBDIR/armv7
+if [ "$CONFIG_LP_ARCH_ARM" = "y" ]; then
+  _ARCHINCDIR=$_INCDIR/arm
+  _ARCHLIBDIR=$_LIBDIR/arm
   _ARCHEXTRA=""
-  _ARCH=armv7
+  _ARCH=arm
 fi
 
 if [ "$CONFIG_LP_ARCH_X86" = "y" ]; then

payloads/libpayload/configs/config.panther

@@ -15,7 +15,7 @@ CONFIG_LP_CHROMEOS=y
 #
 # Architecture Options
 #
-# CONFIG_LP_ARCH_ARMV7 is not set
+# CONFIG_LP_ARCH_ARM is not set
 # CONFIG_LP_ARCH_POWERPC is not set
 CONFIG_LP_ARCH_X86=y
 # CONFIG_LP_MEMMAP_RAM_ONLY is not set

payloads/libpayload/configs/defconfig

@@ -15,7 +15,7 @@
 #
 # Architecture Options
 #
-# CONFIG_LP_ARCH_ARMV7 is not set
+# CONFIG_LP_ARCH_ARM is not set
 CONFIG_LP_ARCH_X86=y
 # CONFIG_LP_MEMMAP_RAM_ONLY is not set
 # CONFIG_LP_MULTIBOOT is not set

payloads/libpayload/configs/defconfig-arm

@@ -15,7 +15,7 @@
 #
 # Architecture Options
 #
-CONFIG_LP_ARCH_ARMV7=y
+CONFIG_LP_ARCH_ARM=y
 # CONFIG_LP_ARCH_X86 is not set
 # CONFIG_LP_MEMMAP_RAM_ONLY is not set
 
@@ -35,6 +35,7 @@ CONFIG_LP_LZMA=y
 # CONFIG_LP_SKIP_CONSOLE_INIT is not set
 CONFIG_LP_CBMEM_CONSOLE=y
 CONFIG_LP_SERIAL_CONSOLE=y
+# CONFIG_LP_8250_SERIAL_CONSOLE is not set
 # CONFIG_LP_SERIAL_SET_SPEED is not set
 # CONFIG_LP_SERIAL_ACS_FALLBACK is not set
 CONFIG_LP_VIDEO_CONSOLE=y
@@ -60,10 +61,6 @@ CONFIG_LP_USB_HUB=y
 CONFIG_LP_USB_MSC=y
 CONFIG_LP_USB_GEN_HUB=y
 # CONFIG_LP_USB_PCI is not set
-CONFIG_LP_USB_MEMORY=y
-CONFIG_LP_USB_OHCI_BASE_ADDRESS=0x12120000
-CONFIG_LP_USB_EHCI_BASE_ADDRESS=0x12110000
-CONFIG_LP_USB_XHCI_BASE_ADDRESS=0x12000000
 # CONFIG_LP_BIG_ENDIAN is not set
 CONFIG_LP_LITTLE_ENDIAN=y
 # CONFIG_LP_IO_ADDRESS_SPACE is not set

payloads/libpayload/include/arm/arch/cache.h

@@ -26,11 +26,11 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * cache.h: Cache maintenance API for ARMv7
+ * cache.h: Cache maintenance API for ARM
  */
 
-#ifndef ARMV7_CACHE_H
-#define ARMV7_CACHE_H
+#ifndef ARM_CACHE_H
+#define ARM_CACHE_H
 
 #include <stddef.h>
 #include <stdint.h>
@@ -320,8 +320,8 @@ void tlb_invalidate_all(void);
  * Generalized setup/init functions
  */
 
-/* invalidate all caches on ARMv7 */
-void armv7_invalidate_caches(void);
+/* invalidate all caches on ARM */
+void arm_invalidate_caches(void);
 
 /* mmu initialization (set page table address, set permissions, etc) */
 void mmu_init(void);
@@ -338,4 +338,4 @@ void mmu_disable_range(unsigned long start_mb, unsigned long size_mb);
 void mmu_config_range(unsigned long start_mb, unsigned long size_mb,
 						enum dcache_policy policy);
 
-#endif /* ARMV7_CACHE_H */
+#endif /* ARM_CACHE_H */

payloads/libpayload/include/cbfs_core.h

@@ -106,7 +106,7 @@ struct cbfs_header {
  */
 #define CBFS_ARCHITECTURE_UNKNOWN  0xFFFFFFFF
 #define CBFS_ARCHITECTURE_X86      0x00000001
-#define CBFS_ARCHITECTURE_ARMV7    0x00000010
+#define CBFS_ARCHITECTURE_ARM      0x00000010
 
 /** This is a component header - every entry in the CBFS
     will have this header.

payloads/libpayload/sample/Makefile

@@ -31,7 +31,7 @@
 include ../.xcompile
 include ../.config
 
-ARCH-$(CONFIG_ARCH_ARMV7)   := armv7
+ARCH-$(CONFIG_ARCH_ARMV)   := arm
 ARCH-$(CONFIG_ARCH_POWERPC) := powerpc
 ARCH-$(CONFIG_ARCH_X86)     := i386
 

payloads/libpayload/util/xcompile/xcompile

@@ -106,7 +106,7 @@ detect_special_flags() {
 		CFLAGS="$CFLAGS -Wl,--build-id=none"
 
 	case "$architecture" in
-		armv7 )
+		arm )
 			# testcc "$CC" "$CFLAGS -mcpu=cortex-a9" &&
 			#	CFLAGS="$CFLAGS -mcpu=cortex-a9"
 			;;
@@ -135,13 +135,13 @@ touch "$TMPFILE"
 trap clean_up EXIT
 
 # Architecture definition
-SUPPORTED_ARCHITECTURE="x86 armv7"
+SUPPORTED_ARCHITECTURE="x86 arm"
 
 # ARM Architecture
-TARCH_armv7="armv7"
-TBFDARCH_armv7="littlearm"
-TCLIST_armv7="armv7a"
-TWIDTH_armv7="32"
+TARCH_arm="arm"
+TBFDARCH_arm="littlearm"
+TCLIST_arm="armv7a"
+TWIDTH_arm="32"
 
 # X86 Architecture
 TARCH_x86="i386"

payloads/tianocoreboot/libpayload.config

@@ -15,7 +15,7 @@
 #
 # Architecture Options
 #
-# CONFIG_ARCH_ARMV7 is not set
+# CONFIG_ARCH_ARM is not set
 # CONFIG_ARCH_POWERPC is not set
 CONFIG_ARCH_X86=y
 # CONFIG_MEMMAP_RAM_ONLY is not set

src/Kconfig

@@ -210,12 +210,12 @@ config ARCH_X86
 	default n
 	select PCI
 
-config ARCH_ARMV7
+config ARCH_ARM
 	bool
 	default n
 
 source src/arch/x86/Kconfig
-source src/arch/armv7/Kconfig
+source src/arch/arm/Kconfig
 
 source src/vendorcode/Kconfig
 
@@ -273,7 +273,7 @@ config TPM
 	bool
 	default n
 	select LPC_TPM if ARCH_X86
-	select I2C_TPM if ARCH_ARMV7
+	select I2C_TPM if ARCH_ARM
 	help
 	  Enable this option to enable TPM support in coreboot.
 

src/arch/arm/Kconfig

@@ -1,16 +1,18 @@
-config ARCH_BOOTBLOCK_ARMV7
+config ARCH_BOOTBLOCK_ARM
 	bool
 	default n
-	select ARCH_ARMV7
+	select ARCH_ARM
 
-config ARCH_ROMSTAGE_ARMV7
+config ARCH_ROMSTAGE_ARM
 	bool
 	default n
 
-config ARCH_RAMSTAGE_ARMV7
+config ARCH_RAMSTAGE_ARM
 	bool
 	default n
 
+source src/arch/arm/armv7/Kconfig
+
 # If a custom bootblock is necessary, this option should be "select"-ed by
 # the thing that needs it, probably the CPU.
 config ARM_BOOTBLOCK_CUSTOM

src/arch/arm/Makefile.inc

@@ -23,98 +23,86 @@
 ###############################################################################
 # Take care of subdirectories
 ###############################################################################
-subdirs-y += boot/
-subdirs-y += lib/
+subdirs-y += armv7/
 
 ###############################################################################
 # ARM specific options
 ###############################################################################
 
-ifeq ($(CONFIG_ARCH_ROMSTAGE_ARMV7),y)
-CBFSTOOL_PRE1_OPTS = -m armv7 -b $(CONFIG_BOOTBLOCK_ROM_OFFSET) -H $(CONFIG_CBFS_HEADER_ROM_OFFSET) -o $(CONFIG_CBFS_ROM_OFFSET)
+ifeq ($(CONFIG_ARCH_ROMSTAGE_ARM),y)
+CBFSTOOL_PRE1_OPTS = -m arm -b $(CONFIG_BOOTBLOCK_ROM_OFFSET) -H $(CONFIG_CBFS_HEADER_ROM_OFFSET) -o $(CONFIG_CBFS_ROM_OFFSET)
 CBFSTOOL_PRE_OPTS = -b 0
 endif
 
-ifeq ($(CONFIG_ARCH_ARMV7),y)
-stages_c = $(src)/arch/armv7/stages.c
-stages_o = $(obj)/arch/armv7/stages.o
+ifeq ($(CONFIG_ARCH_ARM),y)
+stages_c = $(src)/arch/arm/stages.c
+stages_o = $(obj)/arch/arm/stages.o
 
 $(stages_o): $(stages_c) $(obj)/config.h
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
-	$(CC_armv7) -I. $(CPPFLAGS_armv7) -c -o $@ $< -marm
+	$(CC_arm) -I. $(CPPFLAGS_arm) -c -o $@ $< -marm
 
-endif # CONFIG_ARCH_ARMV7
+endif # CONFIG_ARCH_ARM
 
 ###############################################################################
 # bootblock
 ###############################################################################
 
-ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARMV7),y)
+ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARM),y)
 
-ifneq ($(CONFIG_ARM_BOOTBLOCK_CUSTOM),y)
-bootblock-y += bootblock.S
-bootblock-$(CONFIG_BOOTBLOCK_SIMPLE) += bootblock_simple.c
-endif
 bootblock-y += id.S
 $(obj)/arch/arm/id.bootblock.o: $(obj)/build.h
 
 bootblock-y += stages.c
-bootblock-y += cache.c
 bootblock-y += eabi_compat.c
 bootblock-y += memset.S
 bootblock-y += memcpy.S
 bootblock-y += memmove.S
-bootblock-y += mmu.c
 
-$(objcbfs)/bootblock.debug: $(src)/arch/armv7/bootblock.ld $(obj)/ldoptions $$(bootblock-objs) $(obj)/config.h
+$(objcbfs)/bootblock.debug: $(src)/arch/arm/bootblock.ld $(obj)/ldoptions $$(bootblock-objs) $(obj)/config.h
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
 ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-	$(LD_bootblock) -m armelf_linux_eabi -static -o $@ -L$(obj) $< -T $(src)/arch/armv7/bootblock.ld
+	$(LD_bootblock) -m armelf_linux_eabi -static -o $@ -L$(obj) $< -T $(src)/arch/arm/bootblock.ld
 else
-	$(CC_bootblock) $(CFLAGS_bootblock) -nostartfiles -include $(obj)/config.h -static -o $@ -L$(obj) -T $(src)/arch/armv7/bootblock.ld -Wl,--start-group $(bootblock-objs) $(LIBGCC_FILE_NAME_bootblock) -Wl,--end-group
+	$(CC_bootblock) $(CFLAGS_bootblock) -nostartfiles -include $(obj)/config.h -static -o $@ -L$(obj) -T $(src)/arch/arm/bootblock.ld -Wl,--start-group $(bootblock-objs) $(LIBGCC_FILE_NAME_bootblock) -Wl,--end-group
 endif
 
-endif # CONFIG_ARCH_BOOTBLOCK_ARMV7
+endif # CONFIG_ARCH_BOOTBLOCK_ARM
 
 ###############################################################################
 # romstage
 ###############################################################################
 
-ifeq ($(CONFIG_ARCH_ROMSTAGE_ARMV7),y)
+ifeq ($(CONFIG_ARCH_ROMSTAGE_ARM),y)
 
 romstage-y += stages.c
-romstage-y += cache.c
 romstage-y += div0.c
 romstage-y += eabi_compat.c
 romstage-y += memset.S
 romstage-y += memcpy.S
 romstage-y += memmove.S
 
-VBOOT_STUB_DEPS += $(obj)/arch/armv7/eabi_compat.rmodules_arm.o
+VBOOT_STUB_DEPS += $(obj)/arch/arm/eabi_compat.rmodules_arm.o
 
-$(objcbfs)/romstage.debug: $$(romstage-objs) $(src)/arch/armv7/romstage.ld $(obj)/ldoptions
+$(objcbfs)/romstage.debug: $$(romstage-objs) $(src)/arch/arm/romstage.ld $(obj)/ldoptions
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
 ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-	$(LD_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) $(romstage-objs) -T $(src)/arch/armv7/romstage.ld
+	$(LD_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) $(romstage-objs) -T $(src)/arch/arm/romstage.ld
 else
-	$(CC_romstage) $(CFLAGS_romstage) -nostartfiles -static -o $@ -L$(obj) -T $(src)/arch/armv7/romstage.ld -Wl,--start-group $(romstage-objs) $(LIBGCC_FILE_NAME_romstage) -Wl,--end-group
+	$(CC_romstage) $(CFLAGS_romstage) -nostartfiles -static -o $@ -L$(obj) -T $(src)/arch/arm/romstage.ld -Wl,--start-group $(romstage-objs) $(LIBGCC_FILE_NAME_romstage) -Wl,--end-group
 endif
 
-endif # CONFIG_ARCH_ROMSTAGE_ARMV7
+endif # CONFIG_ARCH_ROMSTAGE_ARM
 
 ###############################################################################
 # ramstage
 ###############################################################################
 
-ifeq ($(CONFIG_ARCH_RAMSTAGE_ARMV7),y)
+ifeq ($(CONFIG_ARCH_RAMSTAGE_ARM),y)
 
 ramstage-y += stages.c
-ramstage-y += exception.c
-ramstage-y += exception_asm.S
 ramstage-y += div0.c
-ramstage-y += cache.c
 ramstage-y += cpu.c
-ramstage-y += mmu.c
 ramstage-y += eabi_compat.c
 ramstage-y += boot.c
 ramstage-y += tables.c
@@ -123,12 +111,12 @@ ramstage-y += memcpy.S
 ramstage-y += memmove.S
 ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c)
 
-$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage) $(src)/arch/armv7/ramstage.ld $(obj)/ldoptions
+$(objcbfs)/ramstage.debug: $$(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage) $(src)/arch/arm/ramstage.ld $(obj)/ldoptions
 	@printf "    CC         $(subst $(obj)/,,$(@))\n"
 ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-	$(LD_ramstage) -m armelf_linux_eabi -o $@ -L$(obj) $< -T $(src)/arch/armv7/ramstage.ld
+	$(LD_ramstage) -m armelf_linux_eabi -o $@ -L$(obj) $< -T $(src)/arch/arm/ramstage.ld
 else
-	$(CC_ramstage) $(CFLAGS_ramstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) -Wl,--start-group $(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage) -Wl,--end-group -T $(src)/arch/armv7/ramstage.ld
+	$(CC_ramstage) $(CFLAGS_ramstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) -Wl,--start-group $(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage) -Wl,--end-group -T $(src)/arch/arm/ramstage.ld
 endif
 
 $(objgenerated)/ramstage.o: $(stages_o) $$(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage)
@@ -139,4 +127,4 @@ else
 	$(CC_ramstage) $(CFLAGS_ramstage) $(CPPFLAGS_ramstage) -nostdlib -r -o $@ -Wl,--start-group $(stages_o) $(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage) -Wl,--end-group
 endif
 
-endif # CONFIG_ARCH_RAMSTAGE_ARMV7
+endif # CONFIG_ARCH_RAMSTAGE_ARM

src/arch/arm/armv7/Kconfig

@@ -0,0 +1,11 @@
+config ARCH_BOOTBLOCK_ARMV7
+	def_bool n
+	select ARCH_BOOTBLOCK_ARM
+
+config ARCH_ROMSTAGE_ARMV7
+	def_bool n
+	select ARCH_ROMSTAGE_ARM
+
+config ARCH_RAMSTAGE_ARMV7
+	def_bool n
+	select ARCH_RAMSTAGE_ARM

src/arch/arm/armv7/Makefile.inc

@@ -0,0 +1,71 @@
+################################################################################
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2013 The ChromiumOS Authors
+##
+## 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.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+###############################################################################
+
+armv7_flags = -march=armv7-a -mthumb -mthumb-interwork \
+	-I$(src)/arch/arm/include/armv7/
+
+###############################################################################
+# bootblock
+###############################################################################
+
+ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARMV7),y)
+
+ifneq ($(CONFIG_ARM_BOOTBLOCK_CUSTOM),y)
+bootblock-y += bootblock.S
+bootblock-$(CONFIG_BOOTBLOCK_SIMPLE) += bootblock_simple.c
+endif
+
+bootblock-y += cache.c
+bootblock-y += mmu.c
+
+CFLAGS_bootblock += $(armv7_flags)
+CPPFLAGS_bootblock += $(armv7_flags)
+
+endif # CONFIG_ARCH_BOOTBLOCK_ARMV7
+
+###############################################################################
+# romstage
+###############################################################################
+
+ifeq ($(CONFIG_ARCH_ROMSTAGE_ARMV7),y)
+
+romstage-y += cache.c
+
+CFLAGS_romstage += $(armv7_flags)
+CPPFLAGS_romstage += $(armv7_flags)
+
+endif # CONFIG_ARCH_ROMSTAGE_ARMV7
+
+###############################################################################
+# ramstage
+###############################################################################
+
+ifeq ($(CONFIG_ARCH_RAMSTAGE_ARMV7),y)
+
+ramstage-y += cache.c
+ramstage-y += exception.c
+ramstage-y += exception_asm.S
+ramstage-y += mmu.c
+
+CFLAGS_ramstage += $(armv7_flags)
+CPPFLAGS_ramstage += $(armv7_flags)
+
+endif # CONFIG_ARCH_RAMSTAGE_ARMV7

src/arch/arm/armv7/bootblock_simple.c

@@ -39,7 +39,7 @@ void main(void)
 	sctlr &= ~(SCTLR_M | SCTLR_C | SCTLR_Z | SCTLR_I);
 	write_sctlr(sctlr);
 
-	armv7_invalidate_caches();
+	arm_invalidate_caches();
 
 	/*
 	 * Re-enable icache and branch prediction. MMU and dcache will be

src/arch/arm/armv7/cache.c

@@ -276,7 +276,7 @@ void dcache_mmu_enable(void)
 	write_sctlr(sctlr);
 }
 
-void armv7_invalidate_caches(void)
+void arm_invalidate_caches(void)
 {
 	uint32_t clidr;
 	int level;

src/arch/arm/include/arch/io.h

@@ -23,48 +23,9 @@
 #ifndef __ASM_ARM_IO_H
 #define __ASM_ARM_IO_H
 
-#include <types.h>
-#include <arch/cache.h>		/* for dmb() */
 #include <arch/byteorder.h>
-
-static inline uint8_t read8(const void *addr)
-{
-	dmb();
-	return *(volatile uint8_t *)addr;
-}
-
-static inline uint16_t read16(const void *addr)
-{
-	dmb();
-	return *(volatile uint16_t *)addr;
-}
-
-static inline uint32_t read32(const void *addr)
-{
-	dmb();
-	return *(volatile uint32_t *)addr;
-}
-
-static inline void write8(uint8_t val, void *addr)
-{
-	dmb();
-	*(volatile uint8_t *)addr = val;
-	dmb();
-}
-
-static inline void write16(uint16_t val, void *addr)
-{
-	dmb();
-	*(volatile uint16_t *)addr = val;
-	dmb();
-}
-
-static inline void write32(uint32_t val, void *addr)
-{
-	dmb();
-	*(volatile uint32_t *)addr = val;
-	dmb();
-}
+#include <arch/arch_io.h>
+#include <stdint.h>
 
 /*
  * FIXME: These are to avoid breaking existing ARM code. We should eventually

src/arch/arm/include/arch/pci_ops.h

@@ -17,8 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef ARCH_ARMV7_PCI_OPS_H
-#define ARCH_ARMV7_PCI_OPS_H
+#ifndef ARCH_ARM_PCI_OPS_H
+#define ARCH_ARM_PCI_OPS_H
 
 /* Empty stub until PCI includes are properly fixed. */
 

src/arch/arm/include/arch/stages.h

@@ -22,7 +22,7 @@
 
 extern void main(void);
 
-void stage_entry(void) __attribute__((section(".text.stage_entry.armv7")));
+void stage_entry(void) __attribute__((section(".text.stage_entry.arm")));
 void stage_exit(void *);
 
 #endif

src/arch/arm/include/armv7/arch/arch_io.h

@@ -0,0 +1,68 @@
+/*
+ * Originally imported from linux/include/asm-arm/io.h. This file has changed
+ * substantially since then.
+ *
+ *  Copyright 2013 Google Inc.
+ *  Copyright (C) 1996-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Modifications:
+ *  08-Apr-2013	G	Replaced several macros with inlines for type safety.
+ *  16-Sep-1996	RMK	Inlined the inx/outx functions & optimised for both
+ *			constant addresses and variable addresses.
+ *  04-Dec-1997	RMK	Moved a lot of this stuff to the new architecture
+ *			specific IO header files.
+ *  27-Mar-1999	PJB	Second parameter of memcpy_toio is const..
+ *  04-Apr-1999	PJB	Added check_signature.
+ *  12-Dec-1999	RMK	More cleanups
+ *  18-Jun-2000 RMK	Removed virt_to_* and friends definitions
+ */
+#ifndef __ASM_ARM_ARCH_IO_H
+#define __ASM_ARM_ARCH_IO_H
+
+#include <arch/cache.h>		/* for dmb() */
+#include <stdint.h>
+
+static inline uint8_t read8(const void *addr)
+{
+	dmb();
+	return *(volatile uint8_t *)addr;
+}
+
+static inline uint16_t read16(const void *addr)
+{
+	dmb();
+	return *(volatile uint16_t *)addr;
+}
+
+static inline uint32_t read32(const void *addr)
+{
+	dmb();
+	return *(volatile uint32_t *)addr;
+}
+
+static inline void write8(uint8_t val, void *addr)
+{
+	dmb();
+	*(volatile uint8_t *)addr = val;
+	dmb();
+}
+
+static inline void write16(uint16_t val, void *addr)
+{
+	dmb();
+	*(volatile uint16_t *)addr = val;
+	dmb();
+}
+
+static inline void write32(uint32_t val, void *addr)
+{
+	dmb();
+	*(volatile uint32_t *)addr = val;
+	dmb();
+}
+
+#endif	/* __ASM_ARM_ARCH_IO_H */

src/arch/arm/include/armv7/arch/cache.h

@@ -26,11 +26,11 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * cache.h: Cache maintenance API for ARMv7
+ * cache.h: Cache maintenance API for ARM
  */
 
-#ifndef ARMV7_CACHE_H
-#define ARMV7_CACHE_H
+#ifndef ARM_CACHE_H
+#define ARM_CACHE_H
 
 #include <stddef.h>
 #include <stdint.h>
@@ -320,8 +320,8 @@ void tlb_invalidate_all(void);
  * Generalized setup/init functions
  */
 
-/* invalidate all caches on ARMv7 */
-void armv7_invalidate_caches(void);
+/* invalidate all caches on ARM */
+void arm_invalidate_caches(void);
 
 /* mmu initialization (set page table address, set permissions, etc) */
 void mmu_init(void);
@@ -338,4 +338,4 @@ void mmu_disable_range(unsigned long start_mb, unsigned long size_mb);
 void mmu_config_range(unsigned long start_mb, unsigned long size_mb,
 						enum dcache_policy policy);
 
-#endif /* ARMV7_CACHE_H */
+#endif /* ARM_CACHE_H */

src/arch/arm/ramstage.ld

@@ -38,7 +38,7 @@ SECTIONS
 	.text : {
 		_text = .;
 		_start = .;
-		*(.text.stage_entry.armv7);
+		*(.text.stage_entry.arm);
 		*(.text);
 		*(.text.*);
 		. = ALIGN(16);

src/arch/arm/romstage.ld

@@ -41,7 +41,7 @@ SECTIONS
 	.romtext . : {
 		_rom = .;
 		_start = .;
-		*(.text.stage_entry.armv7);
+		*(.text.stage_entry.arm);
 		*(.text.startup);
 		*(.text);
 	} : to_load

src/console/Kconfig

@@ -2,7 +2,7 @@ menu "Console"
 
 config BOOTBLOCK_CONSOLE
 	bool "Enable early (bootblock) console output."
-	depends on ARCH_ARMV7
+	depends on ARCH_ARM
 	default n
 	help
 	  Use console during the bootblock if supported

src/cpu/ti/am335x/Makefile.inc

@@ -16,7 +16,7 @@ ramstage-y	+= uart.c
 endif
 
 $(call add-class,omap-header)
-$(eval $(call create_class_compiler,omap-header,armv7))
+$(eval $(call create_class_compiler,omap-header,arm))
 
 real-target: $(obj)/MLO
 

src/device/oprom/yabel/device.h

@@ -128,7 +128,7 @@ u8 biosemu_dev_translate_address(int type, unsigned long * addr);
 static inline void
 out32le(void *addr, u32 val)
 {
-#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARMV7
+#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARM
 	*((u32*) addr) = cpu_to_le32(val);
 #else
 	asm volatile ("stwbrx  %0, 0, %1"::"r" (val), "r"(addr));
@@ -139,7 +139,7 @@ static inline u32
 in32le(void *addr)
 {
 	u32 val;
-#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARMV7
+#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARM
 	val = cpu_to_le32(*((u32 *) addr));
 #else
 	asm volatile ("lwbrx  %0, 0, %1":"=r" (val):"r"(addr));
@@ -150,7 +150,7 @@ in32le(void *addr)
 static inline void
 out16le(void *addr, u16 val)
 {
-#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARMV7
+#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARM
 	*((u16*) addr) = cpu_to_le16(val);
 #else
 	asm volatile ("sthbrx  %0, 0, %1"::"r" (val), "r"(addr));
@@ -161,7 +161,7 @@ static inline u16
 in16le(void *addr)
 {
 	u16 val;
-#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARMV7
+#if CONFIG_ARCH_X86 || CONFIG_ARCH_ARM
 	val = cpu_to_le16(*((u16*) addr));
 #else
 	asm volatile ("lhbrx %0, 0, %1":"=r" (val):"r"(addr));

src/drivers/uart/Kconfig

@@ -5,7 +5,7 @@ config DRIVERS_UART
 
 config DRIVERS_UART_8250IO
 	bool "Serial port on SuperIO"
-	depends on !ARCH_ARMV7
+	depends on !ARCH_ARM
 	default n if NO_UART_ON_SUPERIO
 	default y if ARCH_X86
 

src/include/cbfs_core.h

@@ -107,7 +107,7 @@ struct cbfs_header {
  */
 #define CBFS_ARCHITECTURE_UNKNOWN  0xFFFFFFFF
 #define CBFS_ARCHITECTURE_X86      0x00000001
-#define CBFS_ARCHITECTURE_ARMV7    0x00000010
+#define CBFS_ARCHITECTURE_ARM      0x00000010
 
 /** This is a component header - every entry in the CBFS
     will have this header.

src/soc/nvidia/tegra124/bootblock_asm.S

@@ -1,5 +1,5 @@
 /*
- * Early initialization code for ARMv7 architecture.
+ * Early initialization code for ARM architecture.
  *
  * This file is based off of the OMAP3530/ARM Cortex start.S file from Das
  * U-Boot, which itself got the file from armboot.

src/vendorcode/google/chromeos/fmap.c

@@ -41,7 +41,7 @@ const struct fmap *fmap_find(void)
 	/* wrapping around 0x100000000 */
 	const struct fmap *fmap = (void *)
 		(CONFIG_FLASHMAP_OFFSET - CONFIG_ROM_SIZE);
-#elif CONFIG_ARCH_ARMV7
+#elif CONFIG_ARCH_ARM
 	struct cbfs_media default_media, *media;
 	media = &default_media;
 	init_default_cbfs_media(media);

toolchain.inc

@@ -55,12 +55,9 @@ COREBOOT_STANDARD_STAGES := bootblock romstage ramstage
 
 ARCHDIR-i386    := x86
 ARCHDIR-x86_32  := x86
-ARCHDIR-armv7   := armv7
+ARCHDIR-arm     := arm
 
-CFLAGS_armv7 += \
-	-ffixed-r8\
-	-march=armv7-a\
-	-marm\
+CFLAGS_arm += \
 	-mno-unaligned-access\
 	-mthumb\
 	-mthumb-interwork

util/cbfstool/cbfs.h

@@ -51,7 +51,7 @@ struct cbfs_header {
 
 #define CBFS_ARCHITECTURE_UNKNOWN  0xFFFFFFFF
 #define CBFS_ARCHITECTURE_X86      0x00000001
-#define CBFS_ARCHITECTURE_ARMV7    0x00000010
+#define CBFS_ARCHITECTURE_ARM      0x00000010
 
 #define CBFS_FILE_MAGIC "LARCHIVE"
 

util/cbfstool/cbfstool.c

@@ -586,7 +586,7 @@ static void usage(char *name)
 			"Updates the FIT table with microcode entries\n"
 	     "\n"
 	     "ARCHes:\n"
-	     "  armv7, x86\n"
+	     "  arm, x86\n"
 	     "TYPEs:\n", name, name
 	    );
 	print_supported_filetypes();

util/cbfstool/common.c

@@ -130,7 +130,7 @@ static struct {
 	uint32_t arch;
 	const char *name;
 } arch_names[] = {
-	{ CBFS_ARCHITECTURE_ARMV7, "armv7" },
+	{ CBFS_ARCHITECTURE_ARM, "arm" },
 	{ CBFS_ARCHITECTURE_X86, "x86" },
 	{ CBFS_ARCHITECTURE_UNKNOWN, "unknown" }
 };

util/cbfstool/elfheaders.c

@@ -610,7 +610,7 @@ elf_headers(const struct buffer *pinput,
 
 	// The tool may work in architecture-independent way.
 	if (arch != CBFS_ARCHITECTURE_UNKNOWN &&
-	    !((ehdr->e_machine == EM_ARM) && (arch == CBFS_ARCHITECTURE_ARMV7)) &&
+	    !((ehdr->e_machine == EM_ARM) && (arch == CBFS_ARCHITECTURE_ARM)) &&
 	    !((ehdr->e_machine == EM_386) && (arch == CBFS_ARCHITECTURE_X86))) {
 		ERROR("The stage file has the wrong architecture\n");
 		return -1;

util/runfw/googlesnow.c

@@ -114,7 +114,7 @@ Error in re-setting breakpoint 3: No source file named runbios.c.
 1: x/i $pc
 => 0x20234bc <call_bootblock+12>:       blx     0x20244b8 <main>
 (gdb)
-main (bist=0) at src/arch/armv7/bootblock_simple.c:37
+main (bist=0) at src/arch/arm/bootblock_simple.c:37
 37      {
 1: x/i $pc
 => 0x20244b8 <main>:    push    {r3, lr}

util/showdevicetree/showdt.c

@@ -165,5 +165,5 @@ main()
  * Example: (yank this and paste into M-x compile in emacs)
  * or tail -2 showdt.c | head -1 |sh
  * or whatever.
-   cc -I ../src -I ../src/include -I ../src/arch/armv7/include/ -include build/mainboard/google/snow/static.c showdt.c
+   cc -I ../src -I ../src/include -I ../src/arch/arm/include/ -include build/mainboard/google/snow/static.c showdt.c
 */

util/xcompile/xcompile

@@ -167,10 +167,10 @@ EOF
 }
 
 # Architecture definition
-SUPPORTED_ARCHITECTURE="x86 armv7 aarch64"
+SUPPORTED_ARCHITECTURE="x86 arm aarch64"
 
-arch_config_armv7() {
-	TARCH="armv7"
+arch_config_arm() {
+	TARCH="arm"
 	TBFDARCH="littlearm"
 	TCLIST="armv7a armv7-a"
 	TWIDTH="32"