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xip: Do not pass --xip for early stages if CAR supports code execution 

On modern x86 platforms like apollolake, pre-RAM stages verstage and
romstage run within the cache-as-ram region. Thus, we do not need to
pass in the --xip parameter to cbfstool while adding these
stages. Introduce a new Kconfig variable NO_XIP_EARLY_STAGES which is
default false for all x86 platforms. Apollolake selects this option
since it supports code execution with CAR.

Change-Id: I2848046472f40f09ce7fc230c258b0389851b2ea
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/14623
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Furquan Shaikh 2016-05-04 23:25:16 -07:00
parent 2e78aa5a78
commit 94b18a1757
4 changed files with 28 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Makefile.inc
View File

@ -798,13 +798,21 @@ ifeq ($(CONFIG_ARCH_ROMSTAGE_X86_32)$(CONFIG_ARCH_ROMSTAGE_X86_64),y)
#
# Make sure that segment for .car.data is ignored while adding romstage.
$(CONFIG_CBFS_PREFIX)/romstage-align := 64
$(CONFIG_CBFS_PREFIX)/romstage-options := --xip -S .car.data
$(CONFIG_CBFS_PREFIX)/romstage-options := -S ".car.data"
# If CAR does not support execution of code, romstage on x86 is expected to be
# xip.
ifneq ($(CONFIG_NO_XIP_EARLY_STAGES),y)
$(CONFIG_CBFS_PREFIX)/romstage-options += --xip
# If XIP_ROM_SIZE isn't being used don't overly constrain romstage by passing
# -P with a default value.
ifneq ($(CONFIG_NO_FIXED_XIP_ROM_SIZE),y)
$(CONFIG_CBFS_PREFIX)/romstage-options += -P $(CONFIG_XIP_ROM_SIZE)
endif
endif
endif # CONFIG_NO_FIXED_XIP_ROM_SIZE
endif # CONFIG_NO_XIP_EARLY_STAGES
endif # CONFIG_ARCH_ROMSTAGE_X86_32 / CONFIG_ARCH_ROMSTAGE_X86_64
cbfs-files-y += $(CONFIG_CBFS_PREFIX)/ramstage
$(CONFIG_CBFS_PREFIX)/ramstage-file := $(objcbfs)/ramstage.elf

8
src/Kconfig
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@ -199,6 +199,14 @@ config INCLUDE_CONFIG_FILE
config 0x8d740 raw 3324
(empty) 0x8e480 null 3610440
config NO_XIP_EARLY_STAGES
bool
default n if ARCH_X86
default y
help
Identify if --xip parameter needs to be passed into cbfstool for early
stages.
config EARLY_CBMEM_INIT
def_bool !LATE_CBMEM_INIT

1
src/soc/intel/apollolake/Kconfig
View File

@ -24,6 +24,7 @@ config CPU_SPECIFIC_OPTIONS
select MMCONF_SUPPORT
select MMCONF_SUPPORT_DEFAULT
select NO_FIXED_XIP_ROM_SIZE
select NO_XIP_EARLY_STAGES
select PARALLEL_MP
select PCIEXP_ASPM
select PCIEXP_COMMON_CLOCK

10
src/vendorcode/google/chromeos/vboot2/Makefile.inc
View File

@ -76,9 +76,15 @@ cbfs-files-$(CONFIG_SEPARATE_VERSTAGE) += $(CONFIG_CBFS_PREFIX)/verstage
$(CONFIG_CBFS_PREFIX)/verstage-file := $(objcbfs)/verstage.elf
$(CONFIG_CBFS_PREFIX)/verstage-type := stage
$(CONFIG_CBFS_PREFIX)/verstage-compression := $(CBFS_PRERAM_COMPRESS_FLAG)
# Verstage on x86 expected to be xip.
ifeq ($(CONFIG_ARCH_VERSTAGE_X86_32)$(CONFIG_ARCH_VERSTAGE_X86_64),y)
$(CONFIG_CBFS_PREFIX)/verstage-options := -a 64 --xip -S ".car.data"
$(CONFIG_CBFS_PREFIX)/verstage-options := -a 64 -S ".car.data"
# If CAR does not support execution of code, verstage on x86 is expected to be
# xip.
ifneq ($(CONFIG_NO_XIP_EARLY_STAGES),y)
$(CONFIG_CBFS_PREFIX)/verstage-options += --xip
endif
endif