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 /cmd/blkmap.c | |
| 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 'cmd/blkmap.c')
| -rw-r--r-- | cmd/blkmap.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/cmd/blkmap.c b/cmd/blkmap.c index 164f80f1387..86a123b1cd3 100644 --- a/cmd/blkmap.c +++ b/cmd/blkmap.c @@ -62,13 +62,18 @@ static int do_blkmap_map_mem(struct map_ctx *ctx, int argc, char *const argv[]) { phys_addr_t addr; int err; + bool preserve = false; if (argc < 2) return CMD_RET_USAGE; addr = hextoul(argv[1], NULL); - err = blkmap_map_pmem(ctx->dev, ctx->blknr, ctx->blkcnt, addr); + if (argc == 3 && !strcmp(argv[2], "preserve")) + preserve = true; + + err = blkmap_map_pmem(ctx->dev, ctx->blknr, ctx->blkcnt, addr, + preserve); if (err) { printf("Unable to map %#llx at block 0x" LBAF ": %d\n", (unsigned long long)addr, ctx->blknr, err); @@ -221,7 +226,7 @@ U_BOOT_CMD_WITH_SUBCMDS( "blkmap create <label> - create device\n" "blkmap destroy <label> - destroy device\n" "blkmap map <label> <blk#> <cnt> linear <interface> <dev> <blk#> - device mapping\n" - "blkmap map <label> <blk#> <cnt> mem <addr> - memory mapping\n", + "blkmap map <label> <blk#> <cnt> mem <addr> [preserve] - memory mapping\n", U_BOOT_SUBCMD_MKENT(info, 2, 1, do_blkmap_common), U_BOOT_SUBCMD_MKENT(part, 2, 1, do_blkmap_common), U_BOOT_SUBCMD_MKENT(dev, 4, 1, do_blkmap_common), |