Introduce stage-specific architecture for coreboot

Make all three coreboot stages (bootblock, romstage and ramstage) aware of the
architecture specific to that stage i.e. we will have CONFIG_ARCH variables for
each of the three stages. This allows us to have an SOC with any combination of
architectures and thus every stage can be made to run on a completely different
architecture independent of others. Thus, bootblock can have an x86 arch whereas
romstage and ramstage can have arm32 and arm64 arch respectively. These stage
specific CONFIG_ARCH_ variables enable us to select the proper set of toolchain
and compiler flags for every stage.

These options can be considered as either arch or modes eg: x86 running in
different modes or ARM having different arch types (v4, v7, v8). We have got rid
of the original CONFIG_ARCH option completely as every stage can have any
architecture of its own. Thus, almost all the components of coreboot are
identified as being part of one of the three stages (bootblock, romstage or
ramstage). The components which cannot be classified as such e.g. smm, rmodules
can have their own compiler toolset which is for now set to *_i386. Hence, all
special classes are treated in a similar way and the compiler toolset is defined
using create_class_compiler defined in Makefile.

In order to meet these requirements, changes have been made to CC, LD, OBJCOPY
and family to add CC_bootblock, CC_romstage, CC_ramstage and similarly others.
Additionally, CC_x86_32 and CC_armv7 handle all the special classes. All the
toolsets are defined using create_class_compiler.

Few additional macros have been introduced to identify the class to be used at
various points, e.g.: CC_$(class) derives the $(class) part from the name of
the stage being compiled.

We have also got rid of COREBOOT_COMPILER, COREBOOT_ASSEMBLER and COREBOOT_LINKER
as they do not make any sense for coreboot as a whole. All these attributes are
associated with each of the stages.

Change-Id: I923f3d4fb097d21071030b104c372cc138c68c7b
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: http://review.coreboot.org/5577
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@gmail.com>

3 files changed, 4 insertions, 58 deletions

diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 8a82058dae..f82a3fa3fd 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -19,27 +19,10 @@
 subdirs-y += loaders
 
 bootblock-y += cbfs.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMSET),y)
-bootblock-y += memset.c
-endif
 bootblock-y += memchr.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
-bootblock-y += memcpy.c
-endif
 bootblock-y += memcmp.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMMOVE),y)
-bootblock-y += memmove.c
-endif
 
-ifneq ($(CONFIG_HAVE_ARCH_MEMSET),y)
-romstage-y += memset.c
-rmodules-y += memset.c
-endif
 romstage-y += memchr.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
-romstage-y += memcpy.c
-rmodules-y += memcpy.c
-endif
 romstage-y += memcmp.c
 rmodules-y += memcmp.c
 romstage-y += cbfs.c
@@ -53,26 +36,14 @@ romstage-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c
 endif
 
 romstage-y += compute_ip_checksum.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMMOVE),y)
-romstage-y += memmove.c
-endif
-romstage-$(CONFIG_ARCH_X86) += gcc.c
+romstage-$(CONFIG_ARCH_ROMSTAGE_X86_32) += gcc.c
 
 ramstage-y += hardwaremain.c
 ramstage-y += selfboot.c
 ramstage-y += coreboot_table.c
 ramstage-y += bootmem.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMSET),y)
-ramstage-y += memset.c
-endif
 ramstage-y += memchr.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
-ramstage-y += memcpy.c
-endif
 ramstage-y += memcmp.c
-ifneq ($(CONFIG_HAVE_ARCH_MEMMOVE),y)
-ramstage-y += memmove.c
-endif
 ramstage-y += malloc.c
 smm-$(CONFIG_SMM_TSEG) += malloc.c
 ramstage-y += delay.c
@@ -83,7 +54,7 @@ ramstage-y += cbfs.c
 ramstage-y += lzma.c
 #ramstage-y += lzmadecode.c
 ramstage-y += stack.c
-ramstage-$(CONFIG_ARCH_X86) += gcc.c
+ramstage-$(CONFIG_ARCH_RAMSTAGE_X86_32) += gcc.c
 ramstage-y += clog2.c
 romstage-y += clog2.c
 ramstage-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c
@@ -114,15 +85,6 @@ ramstage-$(CONFIG_REG_SCRIPT) += reg_script.c
 
 romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += ramstage_cache.c
 
-ifneq ($(CONFIG_HAVE_ARCH_MEMSET),y)
-smm-y += memset.c
-endif
-ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
-smm-y += memcpy.c
-endif
-ifneq ($(CONFIG_HAVE_ARCH_MEMMOVE),y)
-smm-y += memmove.c
-endif
 smm-y += cbfs.c memcmp.c
 smm-y += gcc.c
 
@@ -146,8 +108,8 @@ RMODULE_LDFLAGS  := -nostartfiles -Wl,--emit-relocs -Wl,-z,defs -Wl,-Bsymbolic -
 # rmdoule is named $(1).rmod
 define rmodule_link
 $(strip $(1)): $(strip $(2)) $$(RMODULE_LDSCRIPT) $$(obj)/ldoptions $$(RMODTOOL)
-	$$(CC) $$(CFLAGS) $$(RMODULE_LDFLAGS) -Wl,--defsym=__heap_size=$(strip $(3)) -o $$@ -Wl,--start-group $(strip $(2)) $$(LIBGCC_FILE_NAME) -Wl,--end-group
-	$$(NM) -n $$@ > $$(basename $$@).map
+	$$(CC_rmodules) $$(CFLAGS_rmodules) $$(RMODULE_LDFLAGS) -Wl,--defsym=__heap_size=$(strip $(3)) -o $$@ -Wl,--start-group $(strip $(2)) $$(LIBGCC_FILE_NAME_rmodules) -Wl,--end-group
+	$$(NM_rmodules) -n $$@ > $$(basename $$@).map
 
 $(strip $(1)).rmod: $(strip $(1))
 	$$(RMODTOOL) -i $$^ -o $$@
diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c
index fbc1902f9a..9a6401af99 100644
--- a/src/lib/coreboot_table.c
+++ b/src/lib/coreboot_table.c
@@ -284,9 +284,6 @@ static void lb_strings(struct lb_header *header)
 		{ LB_TAG_COMPILE_BY,     coreboot_compile_by,     },
 		{ LB_TAG_COMPILE_HOST,   coreboot_compile_host,   },
 		{ LB_TAG_COMPILE_DOMAIN, coreboot_compile_domain, },
-		{ LB_TAG_COMPILER,       coreboot_compiler,       },
-		{ LB_TAG_LINKER,         coreboot_linker,         },
-		{ LB_TAG_ASSEMBLER,      coreboot_assembler,      },
 	};
 	unsigned int i;
 	for(i = 0; i < ARRAY_SIZE(strings); i++) {
diff --git a/src/lib/version.c b/src/lib/version.c
index 4ec1eb65e1..00429bfd8e 100644
--- a/src/lib/version.c
+++ b/src/lib/version.c
@@ -25,16 +25,6 @@
 #error  COREBOOT_COMPILE_HOST not defined
 #endif
 
-#ifndef COREBOOT_COMPILER
-#error  COREBOOT_COMPILER not defined
-#endif
-#ifndef COREBOOT_LINKER
-#error  COREBOOT_LINKER not defined
-#endif
-#ifndef COREBOOT_ASSEMBLER
-#error  COREBOOT_ASSEMBLER not defined
-#endif
-
 #ifndef  COREBOOT_EXTRA_VERSION
 #define COREBOOT_EXTRA_VERSION ""
 #endif
@@ -50,7 +40,4 @@ const char coreboot_compile_time[]   = COREBOOT_COMPILE_TIME;
 const char coreboot_compile_by[]     = COREBOOT_COMPILE_BY;
 const char coreboot_compile_host[]   = COREBOOT_COMPILE_HOST;
 const char coreboot_compile_domain[] = COREBOOT_COMPILE_DOMAIN;
-const char coreboot_compiler[]       = COREBOOT_COMPILER;
-const char coreboot_linker[]         = COREBOOT_LINKER;
-const char coreboot_assembler[]      = COREBOOT_ASSEMBLER;