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commonlib/region: expose subregion helper function

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Export region_is_subregion() for determinig if a region is a child of
a parent region.

BUG=b:69614064

Change-Id: I6363fe4fdb33342f9d025a726ec7e17e87adf7e0
Signed-off-by: Aaron Durbn <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/22878
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Aaron Durbin 2017-12-14 15:22:04 -07:00
parent 9ab8ae6a55
commit 02103e34d7
2 changed files with 10 additions and 7 deletions
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3
src/commonlib/include/commonlib/region.h
View file

@ -112,6 +112,9 @@ void region_device_init(struct region_device *rdev,
const struct region_device_ops *ops, size_t offset,
size_t size);
/* Return 1 if child is subregion of parent, else 0. */
int region_is_subregion(const struct region *p, const struct region *c);
static inline size_t region_offset(const struct region *r)
{
return r->offset;

14
src/commonlib/region.c
View file

@ -22,7 +22,7 @@ static inline size_t region_end(const struct region *r)
return region_sz(r) + region_offset(r);
}
static int is_subregion(const struct region *p, const struct region *c)
int region_is_subregion(const struct region *p, const struct region *c)
{
if (region_offset(c) < region_offset(p))
return 0;
@ -39,7 +39,7 @@ static int is_subregion(const struct region *p, const struct region *c)
static int normalize_and_ok(const struct region *outer, struct region *inner)
{
inner->offset += region_offset(outer);
return is_subregion(outer, inner);
return region_is_subregion(outer, inner);
}
static const struct region_device *rdev_root(const struct region_device *rdev)
@ -55,7 +55,7 @@ ssize_t rdev_relative_offset(const struct region_device *p,
if (rdev_root(p) != rdev_root(c))
return -1;
if (!is_subregion(&p->region, &c->region))
if (!region_is_subregion(&p->region, &c->region))
return -1;
return region_device_offset(c) - region_device_offset(p);
@ -350,7 +350,7 @@ static void *xlate_mmap(const struct region_device *rd, size_t offset,
xldev = container_of(rd, __typeof__(*xldev), rdev);
if (!is_subregion(&xldev->sub_region, &req))
if (!region_is_subregion(&xldev->sub_region, &req))
return NULL;
offset -= region_offset(&xldev->sub_region);
@ -378,7 +378,7 @@ static ssize_t xlate_readat(const struct region_device *rd, void *b,
xldev = container_of(rd, __typeof__(*xldev), rdev);
if (!is_subregion(&xldev->sub_region, &req))
if (!region_is_subregion(&xldev->sub_region, &req))
return -1;
offset -= region_offset(&xldev->sub_region);
@ -397,7 +397,7 @@ static ssize_t xlate_writeat(const struct region_device *rd, const void *b,
xldev = container_of(rd, __typeof__(*xldev), rdev);
if (!is_subregion(&xldev->sub_region, &req))
if (!region_is_subregion(&xldev->sub_region, &req))
return -1;
offset -= region_offset(&xldev->sub_region);
@ -416,7 +416,7 @@ static ssize_t xlate_eraseat(const struct region_device *rd,
xldev = container_of(rd, __typeof__(*xldev), rdev);
if (!is_subregion(&xldev->sub_region, &req))
if (!region_is_subregion(&xldev->sub_region, &req))
return -1;
offset -= region_offset(&xldev->sub_region);