Gabe Black (gabeblack@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3664
-gerrit
commit 819b265f7145100f6f84b4e6ed381c1653bac996 Author: Hung-Te Lin hungte@chromium.org Date: Tue Jun 11 21:55:58 2013 -0700
armv7: Reserve space BL1 and checksum header by specifying bootblock offset.
Not all ARM systems need "BL1", and the layout of BL* and bootblock may be different (ex, Exynos 5250 may use a new BL1 with variable length checksum header).
To support that better, define the real base address (and ROM offset) of boot block, and then we can post-processing ROM image file by filling data / checksum and any other information.
Change-Id: I0e3105e52500b6b457371ad33a9aa546acf28928 Signed-off-by: Hung-Te Lin hungte@chromium.org Signed-off-by: Gabe Black gabeblack@chromium.org --- src/arch/armv7/Makefile.inc | 3 ++- src/arch/armv7/bootblock.inc | 8 -------- src/arch/armv7/bootblock.lds | 3 +-- src/cpu/samsung/exynos5250/Kconfig | 34 +++++++++++++++++++------------- src/cpu/samsung/exynos5420/Kconfig | 40 +++++++++++++++++++++++--------------- 5 files changed, 47 insertions(+), 41 deletions(-)
diff --git a/src/arch/armv7/Makefile.inc b/src/arch/armv7/Makefile.inc index 27a0df6..8474315 100644 --- a/src/arch/armv7/Makefile.inc +++ b/src/arch/armv7/Makefile.inc @@ -48,7 +48,8 @@ prebuilt-files = $(foreach file,$(cbfs-files), $(call extract_nth,1,$(file))) # TODO Change -b to Kconfig variable. $(obj)/coreboot.pre: $(objcbfs)/bootblock.bin $(objcbfs)/romstage.elf $$(prebuilt-files) $(CBFSTOOL) $$(cpu_ucode_cbfs_file) $(CBFSTOOL) $@.tmp create -m armv7 -s $(CONFIG_COREBOOT_ROMSIZE_KB)K \ - -B $(objcbfs)/bootblock.bin -a 64 -b 0x0000 \ + -B $(objcbfs)/bootblock.bin -a 64 \ + -b $(CONFIG_BOOTBLOCK_ROM_OFFSET) \ -H $(CONFIG_CBFS_HEADER_ROM_OFFSET) \ -o $(CONFIG_CBFS_ROM_OFFSET) @printf " CBFS $(subst $(obj)/,,$(@))\n" diff --git a/src/arch/armv7/bootblock.inc b/src/arch/armv7/bootblock.inc index bac32e2..b2c993a 100644 --- a/src/arch/armv7/bootblock.inc +++ b/src/arch/armv7/bootblock.inc @@ -29,14 +29,6 @@ * MA 02111-1307 USA */
-.section ".bl1", "a", %progbits -_bl1: - /* For now we have to live with a first stage boot loader - * on ARM, which is 8KB in size and it is prepended to the - * reset vector - */ - .skip (CONFIG_BL1_SIZE_KB * 1024) - .section ".start", "a", %progbits .globl _start _start: b reset diff --git a/src/arch/armv7/bootblock.lds b/src/arch/armv7/bootblock.lds index 6f6040d..8370396 100644 --- a/src/arch/armv7/bootblock.lds +++ b/src/arch/armv7/bootblock.lds @@ -25,12 +25,11 @@ OUTPUT_ARCH(arm) TARGET(binary) SECTIONS { - ROMLOC = CONFIG_BOOTBLOCK_BASE - (CONFIG_BL1_SIZE_KB * 1024); + ROMLOC = CONFIG_BOOTBLOCK_BASE;
/* This section might be better named .setup */ .rom ROMLOC : { _rom = .; - *(.bl1); *(.start); *(.id); *(.text); diff --git a/src/cpu/samsung/exynos5250/Kconfig b/src/cpu/samsung/exynos5250/Kconfig index 5f5add4..75d1178 100644 --- a/src/cpu/samsung/exynos5250/Kconfig +++ b/src/cpu/samsung/exynos5250/Kconfig @@ -10,9 +10,26 @@ config EXYNOS_ACE_SHA bool default n
-config BL1_SIZE_KB - int - default 8 +# ROM image layout. +# +# 0x0000: vendor-provided BL1 (8k). +# 0x2000: bootblock +# 0x2010-0x2090: reserved for CBFS master header. +# 0xA000: Free for CBFS data. + +config BOOTBLOCK_ROM_OFFSET + hex + default 0x2000 + +config CBFS_HEADER_ROM_OFFSET + hex "offset of master CBFS header in ROM" + default 0x2010 + +config CBFS_ROM_OFFSET + # Calculated by BOOTBLOCK_ROM_OFFSET + max bootblock size. + hex "offset of CBFS data in ROM" + default 0x0A000 +
# Example SRAM/iRAM map for Exynos5250 platform: # @@ -50,17 +67,6 @@ config STACK_SIZE hex default 0x1000
-config CBFS_ROM_OFFSET - # Calculated by BL1 + max bootblock size. - hex "offset of CBFS data in ROM" - default 0x0A000 - -# TODO Change this to some better address not overlapping bootblock when -# cbfstool supports creating header in arbitrary location. -config CBFS_HEADER_ROM_OFFSET - hex "offset of master CBFS header in ROM" - default 0x2040 - # TODO We may probably move this to board-specific implementation files instead # of KConfig values. config CBFS_CACHE_ADDRESS diff --git a/src/cpu/samsung/exynos5420/Kconfig b/src/cpu/samsung/exynos5420/Kconfig index 93ece2e..406ffd2 100644 --- a/src/cpu/samsung/exynos5420/Kconfig +++ b/src/cpu/samsung/exynos5420/Kconfig @@ -10,20 +10,39 @@ config EXYNOS_ACE_SHA bool default n
-config BL1_SIZE_KB - int - default 8 +# ROM image layout. +# +# 0x0000: vendor-provided BL1 (8k). +# 0x2000: variable length bootblock checksum header +# 0x2010: bootblock +# 0x2020-0x20A0: reserved for CBFS master header. +# 0xA000: Free for CBFS data. + +config BOOTBLOCK_ROM_OFFSET + hex + default 0x2010 + +config CBFS_HEADER_ROM_OFFSET + hex "offset of master CBFS header in ROM" + default 0x2020 + +config CBFS_ROM_OFFSET + # Calculated by BOOTBLOCK_ROM_OFFSET + max bootblock size. + hex "offset of CBFS data in ROM" + default 0x0A000 +
# Example SRAM/iRAM map for Exynos5420 platform: # # 0x0202_0000: vendor-provided BL1 -# 0x0202_4400: bootblock, assume up to 32KB in size +# 0x0202_4400: variable length bootblock checksum header. +# 0x0202_4410: bootblock, assume up to 32KB in size # 0x0203_0000: romstage, assume up to 128KB in size. # 0x0207_4000: stack pointer
config BOOTBLOCK_BASE hex - default 0x02024400 + default 0x02024410
config ROMSTAGE_BASE hex @@ -50,17 +69,6 @@ config STACK_SIZE hex default 0x1000
-config CBFS_ROM_OFFSET - # Calculated by BL1 + max bootblock size. - hex "offset of CBFS data in ROM" - default 0x0A000 - -# TODO Change this to some better address not overlapping bootblock when -# cbfstool supports creating header in arbitrary location. -config CBFS_HEADER_ROM_OFFSET - hex "offset of master CBFS header in ROM" - default 0x2040 - # TODO We may probably move this to board-specific implementation files instead # of KConfig values. config CBFS_CACHE_ADDRESS