diff options
| author | David Hendricks <dhendrix@chromium.org> | 2013-01-09 17:45:19 -0800 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-01-10 18:01:14 +0100 |
| commit | 9ad1f56951df3d3877b9ae588909b1cb059c1cd7 (patch) | |
| tree | 2cec1b223b2b2720e4497f40815cfa917c5eb4e7 /util | |
| parent | 8bc10b74dc36cdefdfb5a1c4457d44d9ec32fa15 (diff) | |
| download | coreboot-9ad1f56951df3d3877b9ae588909b1cb059c1cd7.tar.xz | |
armv7: dynamically calculate the branch offset in cbfstool
This tidies up the ARMV7 case when creating cbfs:
- Calculate the offset using the size of the master header and offsets
rather than using a magic constant.
- Re-order some assignments so things happen in a logical order.
Change-Id: Id9cdbc3389c8bb504fa99436c9771936cc4c1c23
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2125
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'util')
| -rw-r--r-- | util/cbfstool/common.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c index 3b63e5426d..195cda13c6 100644 --- a/util/cbfstool/common.c +++ b/util/cbfstool/common.c @@ -565,22 +565,23 @@ int create_cbfs_image(const char *romfile, uint32_t _romsize, /* Set up physical/virtual mapping */ offset = romarea; - // should be aligned to align but then we need to dynamically - // create the jump to the bootblock - loadfile(bootblock, &bootblocksize, romarea + offs + 0x20 + - sizeof(struct cbfs_header), SEEK_SET); - master_header = (struct cbfs_header *)(romarea + offs + 0x20); + // should be aligned to align uint32_t *arm_vec = (uint32_t *)(romarea + offs); + master_header = (struct cbfs_header *)(romarea + offs + 0x20); + loadfile(bootblock, &bootblocksize, romarea + offs + 0x20 + + sizeof(struct cbfs_header), SEEK_SET); + /* * Encoding for this branch instruction is: * 31:28 - condition (0xe for always/unconditional) - * 27:24 - 0xa + * 27:24 - Branch (0xa, encoding A1) * 23: 0 - sign-extended offset (in multiples of 4) * * When executing the branch, the PC will read as the address * of current instruction + 8. */ - arm_vec[0] = htonl(0x0e0000ea); // branch to . + 64 bytes + uint32_t imm = ((0x20 + sizeof(struct cbfs_header)) - 8) / 4; + arm_vec[0] = imm | (0xa << 24) | (0xe << 28); master_header->magic = ntohl(CBFS_HEADER_MAGIC); master_header->version = ntohl(CBFS_HEADER_VERSION); |