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)

7 files changed, 9 insertions, 9 deletions

diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h
index 52a4a50..6a54bc8 100644
--- a/util/cbfstool/cbfs.h
+++ b/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"
 
diff --git a/util/cbfstool/cbfstool.c b/util/cbfstool/cbfstool.c
index f236d8b..937b610 100644
--- a/util/cbfstool/cbfstool.c
+++ b/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();
diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c
index 6778eb9..a28e741 100644
--- a/util/cbfstool/common.c
+++ b/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" }
 };
diff --git a/util/cbfstool/elfheaders.c b/util/cbfstool/elfheaders.c
index fdd1599..4c0de89 100644
--- a/util/cbfstool/elfheaders.c
+++ b/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;
diff --git a/util/runfw/googlesnow.c b/util/runfw/googlesnow.c
index 686b4bc..125e0a2 100644
--- a/util/runfw/googlesnow.c
+++ b/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}
diff --git a/util/showdevicetree/showdt.c b/util/showdevicetree/showdt.c
index dc4e4d6..4e904a2 100644
--- a/util/showdevicetree/showdt.c
+++ b/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
 */
diff --git a/util/xcompile/xcompile b/util/xcompile/xcompile
index 4b18942..e9f6d32 100755
--- a/util/xcompile/xcompile
+++ b/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"