diff options
| author | Sughosh Ganu <sughosh.ganu@linaro.org> | 2025-03-17 14:04:01 +0530 |
|---|---|---|
| committer | Ilias Apalodimas <ilias.apalodimas@linaro.org> | 2025-03-26 13:28:08 +0200 |
| commit | 54c39bf104017e3a0b30fdff6104141b719af9ef (patch) | |
| tree | 1d3ed658b32edd8196599723a47be5e7db2d34ec /include/blkmap.h | |
| parent | 45c398028283c73ea24be20a0d0e120d3cd3e850 (diff) | |
blkmap: add an attribute to preserve the mem mapping
Some blkmap memory mapped devices might have to be relevant even
after U-Boot passes control to the next image as part of the platform
boot. An example of such a mapping would be an OS installer ISO image,
information for which has to be provided to the OS kernel. Use the
'preserve' attribute for such mappings. The code for adding a pmem
node to the device-tree then checks if this attribute is set, and adds
a node only for mappings which have this attribute.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'include/blkmap.h')
| -rw-r--r-- | include/blkmap.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/blkmap.h b/include/blkmap.h index d53095437fa..754d8671b01 100644 --- a/include/blkmap.h +++ b/include/blkmap.h @@ -60,10 +60,12 @@ int blkmap_map_mem(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt, * @blknr: Start block number of the mapping * @blkcnt: Number of blocks to map * @paddr: The target physical memory address of the mapping + * @preserve: Mapping intended to be preserved for subsequent stages, + * like the OS (e.g. ISO installer) * Returns: 0 on success, negative error code on failure */ int blkmap_map_pmem(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt, - phys_addr_t paddr); + phys_addr_t paddr, bool preserve); /** * blkmap_from_label() - Find blkmap from label |