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4ae115e145
The board-specific board.h defines things like this:
#define CONFIG_RO_SIZE 1000
#define CONFIG_RW_SIZE 1000
#define CONFIG_SHAREDLIB_SIZE 200
And in the linker scripts we define some preprocessor macros like
so:
#define FW_SIZE_(section) CONFIG_##section##_SIZE
#define FW_SIZE(section) FW_SIZE_(section)
So that we can say things like this:
FLASH (rx) : ORIGIN = FW_OFF(SECTION), LENGTH = FW_SIZE(SECTION)
Note that we have to use FW_SIZE, not FW_SIZE_
The difference is only noticeable when SECTION is #defined. If
${CFLAGS} has
-DSECTION=RW
Then the expansion is this:
FW_SIZE_(SECTION) => CONFIG_SECTION_SIZE
FW_SIZE_(RW) => 1000
There's no difference in the output for this particular CL, but
we should use the correct macro anyway to avoid confusion.
BUG=none
BRANCH=none
TEST=make buildall
Change-Id: I61edc76a1aaeb1c675b384371700f37dda39ed47
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/302150
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit