[coreboot-gerrit] Patch set updated for coreboot: 9dd62f9 regions: add mmap helper device
Aaron Durbin (adurbin@google.com)
gerrit at coreboot.org
Tue Mar 31 05:23:41 CEST 2015
Aaron Durbin (adurbin at google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9132
-gerrit
commit 9dd62f934db256d46dbd453a8c99a167ffa4f363
Author: Aaron Durbin <adurbin at chromium.org>
Date: Fri Mar 27 01:58:06 2015 -0500
regions: add mmap helper device
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 at chromium.org>
---
src/include/region.h | 15 +++++++++++++++
src/lib/region.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/src/include/region.h b/src/include/region.h
index 45fd074..c4e74f2 100644
--- a/src/include/region.h
+++ b/src/include/region.h
@@ -22,6 +22,7 @@
#include <stdint.h>
#include <stddef.h>
+#include <mem_pool.h>
/*
* Region support.
@@ -113,4 +114,18 @@ 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_, cache_, cache_size_) \
+ { \
+ .pool = MEM_POOL_INIT((cache_), (cache_size_)), \
+ .rdev = REGION_DEV_INIT((ops_), (offset_), (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_ */
diff --git a/src/lib/region.c b/src/lib/region.c
index 848139d..6abf7c1 100644
--- a/src/lib/region.c
+++ b/src/lib/region.c
@@ -161,3 +161,35 @@ const struct region_device_ops mem_rdev_ops = {
.munmap = mdev_munmap,
.readat = mdev_readat,
};
+
+void *mmap_helper_rdev_mmap(const struct region_device *rd, size_t offset,
+ size_t size)
+{
+ struct mmap_helper_region_device *mdev;
+ void *mapping;
+
+ mdev = container_of((void *)rd, typeof(*mdev), rdev);
+
+ mapping = mem_pool_alloc(&mdev->pool, size);
+
+ if (mapping == NULL)
+ return NULL;
+
+ if (rd->ops->readat(rd, mapping, offset, size) != size) {
+ mem_pool_free(&mdev->pool, mapping);
+ return NULL;
+ }
+
+ return mapping;
+}
+
+int mmap_helper_rdev_munmap(const struct region_device *rd, void *mapping)
+{
+ struct mmap_helper_region_device *mdev;
+
+ mdev = container_of((void *)rd, typeof(*mdev), rdev);
+
+ mem_pool_free(&mdev->pool, mapping);
+
+ return 0;
+}
More information about the coreboot-gerrit
mailing list