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commonlib/region: Add helpers for dynamic initialization of region dev 

This allows initialization of runtime region devices and xlate region
devices where all parameters cannot be statically determined.

BUG=chrome-os-partner:54563

Change-Id: Ia6e1b695fed3bbfa08598d1593e650fc1465d41f
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15267
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Furquan Shaikh 2016-06-19 23:16:45 -07:00
parent f4dac8ac06
commit 2b57691ce0
2 changed files with 34 additions and 0 deletions
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11
src/commonlib/include/commonlib/region.h
View File

@ -90,6 +90,11 @@ struct region_device {
}, \
}
/* Helper to dynamically initialize region device. */
void region_device_init(struct region_device *rdev,
const struct region_device_ops *ops, size_t offset,
size_t size);
static inline size_t region_offset(const struct region *r)
{
return r->offset;
@ -187,4 +192,10 @@ extern const struct region_device_ops xlate_rdev_ops;
.rdev = REGION_DEV_INIT(&xlate_rdev_ops, 0, (parent_sz_)),\
}
/* Helper to dynamically initialize xlate region device. */
void xlate_region_device_init(struct xlate_region_device *xdev,
const struct region_device *access_dev,
size_t sub_offset, size_t sub_size,
size_t parent_size);
#endif /* _REGION_H_ */

23
src/commonlib/region.c
View File

@ -133,6 +133,29 @@ void mem_region_device_init(struct mem_region_device *mdev, void *base,
mdev->rdev.region.size = size;
}
void region_device_init(struct region_device *rdev,
const struct region_device_ops *ops, size_t offset,
size_t size)
{
memset(rdev, 0, sizeof(*rdev));
rdev->root = NULL;
rdev->ops = ops;
rdev->region.offset = offset;
rdev->region.size = size;
}
void xlate_region_device_init(struct xlate_region_device *xdev,
const struct region_device *access_dev,
size_t sub_offset, size_t sub_size,
size_t parent_size)
{
memset(xdev, 0, sizeof(*xdev));
xdev->access_dev = access_dev;
xdev->sub_region.offset = sub_offset;
xdev->sub_region.size = sub_size;
region_device_init(&xdev->rdev, &xlate_rdev_ops, 0, parent_size);
}
static void *mdev_mmap(const struct region_device *rd, size_t offset,
size_t size __unused)
{