image: android: allow booting lz4-compressed kernels
According to Android image format [1], kernel image resides at 1 page
offset from the boot image address. Grab the magic number from there
and allow U-Boot to handle LZ4-compressed KNL binaries instead of
hardcoding compression type to IH_COMP_NONE. Other compression types,
if needed, can be added later.
Tested on H3ULCB-KF using the image detailed in [2].
[1] Excerpt from include/android_image.h
+-----------------+
| boot header | 1 page
+-----------------+
| kernel | n pages
+-----------------+
| ramdisk | m pages
+-----------------+
| second stage | o pages
+-----------------+
[2] => iminfo 4c000000
## Checking Image at 4c000000 ...
Android image found
kernel size: 85b9d1
kernel address: 48080000
ramdisk size: 54ddbc
ramdisk addrress: 4a180000
second size: 0
second address: 48000800
tags address: 48000100
page size: 800
os_version: 1200012a (ver: 0.9.0, level: 2018.10)
name:
cmdline: buildvariant=userdebug
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
diff --git a/common/image-android.c b/common/image-android.c
index 2f38c19..c31dcd4 100644
--- a/common/image-android.c
+++ b/common/image-android.c
@@ -8,6 +8,7 @@
#include <android_image.h>
#include <malloc.h>
#include <errno.h>
+#include <asm/unaligned.h>
#define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
@@ -126,6 +127,16 @@
return android_image_get_kernel_addr(hdr);
}
+ulong android_image_get_kcomp(const struct andr_img_hdr *hdr)
+{
+ const void *p = (void *)((uintptr_t)hdr + hdr->page_size);
+
+ if (get_unaligned_le32(p) == LZ4F_MAGIC)
+ return IH_COMP_LZ4;
+ else
+ return IH_COMP_NONE;
+}
+
int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
ulong *rd_data, ulong *rd_len)
{