summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorEugeniu Rosca <erosca@de.adit-jv.com>2019-04-01 12:52:52 +0200
committerSimon Glass <sjg@chromium.org>2019-04-23 20:26:43 -0600
commit62392675cdea46ca38a4d2b9be2c82e29b3b6da3 (patch)
tree68ac73ec569bca62e24218d12d1cd18dc0bfea55
parent18b8f2c49e9b0620caf5b661986c01c575e29b9b (diff)
fdt: boot_get_fdt: android: use ENV 'fdtaddr' as fallback
Our platform doesn't store the DTB into the Android image second area, but rather copies the DTB to RAM from a dedicated dtb.img partition [0], prior to booting the Android image by calling bootm. Similar to [1], we find it useful to just call 'bootm' and have the right DTB being passed to OS (assuming its address has been previously stored in 'fdtaddr' by calling `fdt addr <dtb-addr>`). Booting Android with DTB from 'fdtaddr' will only occur if: - No DTB is embedded in the second area of Android image - 'fdtaddr' points to a valid DTB in RAM [0] https://source.android.com/devices/architecture/dto/partitions [1] https://patchwork.ozlabs.org/patch/1046652/ ("Support boot Android image without address on bootm command") Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com> Reviewed-by: Simon Glass <sjg@chromium.org>
-rw-r--r--common/image-fdt.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/common/image-fdt.c b/common/image-fdt.c
index a5d8b41d02..3aa5ffff0f 100644
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -469,7 +469,15 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
debug("## Using FDT in Android image second area\n");
} else {
- goto no_fdt;
+ fdt_addr = env_get_hex("fdtaddr", 0);
+ if (!fdt_addr)
+ goto no_fdt;
+
+ fdt_blob = map_sysmem(fdt_addr, 0);
+ if (fdt_check_header(fdt_blob))
+ goto no_fdt;
+
+ debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr);
}
#endif
} else {