Gabe Black (gabeblack@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3582
-gerrit
commit ebb251fa7ee8d9256e8c28854bf6ad02af4360c5 Author: Gabe Black gabeblack@chromium.org Date: Mon Jul 1 05:16:19 2013 -0700
am335x: Add the config variable ROMSTAGE_BASE to the CPU's Kconfig.
This variable wasn't being defined and was defaulting to zero when used in the ROM stage's linker script. This change defines it as a variable, and gives it a value which is slightly beyond the end of the bootblock. By making the ROM stage request to be loaded slightly farther into memory than it was loaded by the SOC's masked ROM, we ensure that it's moved away from the stage's metadata instead of on top of it. When it moves the other way, it clobbers important values like the entry point vefore the bootblock has had a chance to use them.
Change-Id: I027a1365d05f1d79d7fc1e1349965ccb7d4e81b9 Signed-off-by: Gabe Black gabeblack@chromium.org --- src/cpu/ti/am335x/Kconfig | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/src/cpu/ti/am335x/Kconfig b/src/cpu/ti/am335x/Kconfig index 472fbe7..e776fde 100644 --- a/src/cpu/ti/am335x/Kconfig +++ b/src/cpu/ti/am335x/Kconfig @@ -10,6 +10,17 @@ config BOOTBLOCK_BASE hex default 0x402f0400
+config CBFS_ROM_OFFSET + # Calculated by BL1 + max bootblock size. + default 0x2800 + +# We need to leave a gap between the bootblock and the ROM stage so that when +# it is "loaded" to a slightly different place in on chip memory, it doesn't +# clobber the metadata needed to actually enter it. +config ROMSTAGE_BASE + hex + default 0x402f2d00 + # Stack may reside in either IRAM or DRAM. We will define it to live # at the top of IRAM for now. # @@ -27,11 +38,6 @@ config STACK_SIZE hex default 0x1000
-config CBFS_ROM_OFFSET - # Calculated by BL1 + max bootblock size. - hex "offset of CBFS data in ROM" - default 0x2800 - ## TODO Change this to some better address not overlapping bootblock when ## cbfstool supports creating header in arbitrary location. config CBFS_HEADER_ROM_OFFSET