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regions: add mmap helper device

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In order to facilitate platforms which need a buffer cache
for performing boot device operations provide infrastructure
to share the logic in managing the buffer and operations.

Change-Id: I45dd9f213029706ff92a3e5a2c9edd5e8b541e27
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9132
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Aaron Durbin
2015-03-27 01:58:06 -05:00
parent b419c1a87c
commit e62cf5210c
2 changed files with 55 additions and 0 deletions
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17
src/include/region.h
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@ -22,6 +22,7 @@
#include <stdint.h>
#include <stddef.h>
#include <mem_pool.h>
/*
* Region support.
@ -116,4 +117,20 @@ extern const struct region_device_ops mem_rdev_ops;
.rdev = REGION_DEV_INIT(&mem_rdev_ops, 0, (size_)), \
}
struct mmap_helper_region_device {
struct mem_pool pool;
struct region_device rdev;
};
#define MMAP_HELPER_REGION_INIT(ops_, offset_, size_) \
{ \
.rdev = REGION_DEV_INIT((ops_), (offset_), (size_)), \
}
void mmap_helper_device_init(struct mmap_helper_region_device *mdev,
void *cache, size_t cache_size);
void *mmap_helper_rdev_mmap(const struct region_device *, size_t, size_t);
int mmap_helper_rdev_munmap(const struct region_device *, void *);
#endif /* _REGION_H_ */