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| author | Aaron Durbin <adurbin@chromium.org> | 2015-12-15 13:29:41 -0600 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-01-06 01:11:15 +0100 |
| commit | 990ab7efe5d0eddb96542042bf5106811365e34a (patch) | |
| tree | 9b251fbeb52a6f70f703a988ff553c80ff55b6dd /src/commonlib/include | |
| parent | af91b8b086b6fd087a99a4e88ad76e46defacf9b (diff) | |
| download | coreboot-990ab7efe5d0eddb96542042bf5106811365e34a.tar.xz | |
commonlib: Add function to compute relative offsets from two region_devices.
Provide a helper function which returns the relative offset
between 2 region_devices that have a parent-child child relationship.
BUG=chrome-os-partner:48412
BUG=chromium:445938
BRANCH=None
TEST=Utilized and booted on glados.
Change-Id: Ie0041b33e73a6601748f1289e98b6f1f8756eb11
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/12782
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/commonlib/include')
| -rw-r--r-- | src/commonlib/include/commonlib/region.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/commonlib/include/commonlib/region.h b/src/commonlib/include/commonlib/region.h index cc4ee289d2..35d48ade85 100644 --- a/src/commonlib/include/commonlib/region.h +++ b/src/commonlib/include/commonlib/region.h @@ -121,6 +121,13 @@ static inline void *rdev_mmap_full(const struct region_device *rd) return rdev_mmap(rd, 0, region_device_sz(rd)); } +/* + * Compute relative offset of the child (c) w.r.t. the parent (p). Returns < 0 + * when child is not within the parent's region. + */ +ssize_t rdev_relative_offset(const struct region_device *p, + const struct region_device *c); + struct mem_region_device { char *base; struct region_device rdev; |