vboot2: implement select_firmware for pre-romstage verification

This patch has a basic structure of vboot2 integration. It supports only Nyans,
which have bootblock architecture and romstage architecture are
compatible from linker's perspective.

TEST=Built with VBOOT2_VERIFY_FIRMWARE on/off. Booted Nyan Blaze.
BUG=None
BRANCH=none
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>

Original-Change-Id: I4bbd4d0452604943b376bef20ea8a258820810aa
Original-Reviewed-on: https://chromium-review.googlesource.com/204522
Original-Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Original-Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
(cherry picked from commit a6bce0cbed34def60386f3d9aece59e739740c58)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I63ddfbf463c8a83120828ec8ab994f8146f90001
Reviewed-on: http://review.coreboot.org/8160
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

src/arch/arm/Makefile.inc

@@ -67,6 +67,18 @@ $(objcbfs)/bootblock.debug: $(src)/arch/arm/bootblock.ld $(obj)/ldoptions $$(boo
 
 endif # CONFIG_ARCH_BOOTBLOCK_ARM
 
+###############################################################################
+# verification stage
+###############################################################################
+
+verstage-y += early_console.c
+verstage-y += div0.c
+verstage-y += eabi_compat.c
+verstage-y += memset.S
+verstage-y += memcpy.S
+verstage-y += memmove.S
+verstage-y += stages.c
+
 ###############################################################################
 # romstage
 ###############################################################################

src/arch/arm/armv7/Makefile.inc

@@ -46,6 +46,18 @@ bootblock-S-ccopts += $(armv7_asm_flags)
 
 endif # CONFIG_ARCH_BOOTBLOCK_ARMV7
 
+################################################################################
+## verification stage
+################################################################################
+
+verstage-c-ccopts += $(armv7_flags)
+verstage-S-ccopts += $(armv7_asm_flags)
+verstage-y += cache.c
+verstage-y += cpu.S
+verstage-y += exception.c
+verstage-y += exception_asm.S
+verstage-y += mmu.c
+
 ###############################################################################
 # romstage
 ###############################################################################

src/arch/arm/bootblock.ld

@@ -50,6 +50,7 @@ SECTIONS
 	} : to_load = 0xff
 
 	preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;
+	verstage_preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;
 
 	/DISCARD/ : {
 		*(.comment)

src/arch/arm/libgcc/Makefile.inc

@@ -25,6 +25,10 @@ ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARM),y)
 bootblock-y += $(libgcc_files)
 endif
 
+ifeq ($(CONFIG_ARCH_VERSTAGE_ARM),y)
+verstage-y += $(libgcc_files)
+endif
+
 ifeq ($(CONFIG_ARCH_ROMSTAGE_ARM),y)
 romstage-y += $(libgcc_files)
 endif