[PATCH] abootimg: Add init_boot image support

[Roman Stratiienko]

Quote from [1]:

"For devices launching with Android 13, the generic ramdisk is removed
from the boot image and placed in a separate init_boot image.
This change leaves the boot image with only the GKI kernel."

[1]: https://source.android.com/docs/core/architecture/partitions/generic-boot
Signed-off-by: Roman Stratiienko <r.stratiienko at gmail.com>
---
 boot/image-board.c |  5 ++++-
 cmd/abootimg.c     | 26 +++++++++++++++++++++-----
 include/image.h    |  7 +++++++
 3 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/boot/image-board.c b/boot/image-board.c
index 75f6906cd5..715654ff01 100644
--- a/boot/image-board.c
+++ b/boot/image-board.c
@@ -414,9 +414,12 @@ static int select_ramdisk(struct bootm_headers *images, const char *select, u8 a
 			int ret;
 			if (IS_ENABLED(CONFIG_CMD_ABOOTIMG)) {
 				void *boot_img = map_sysmem(get_abootimg_addr(), 0);
+				void *init_boot_img = map_sysmem(get_ainit_bootimg_addr(), 0);
 				void *vendor_boot_img = map_sysmem(get_avendor_bootimg_addr(), 0);
+				void *ramdisk_img = (init_boot_img == -1) ? boot_img :
+									    init_boot_img;
 
-				ret = android_image_get_ramdisk(boot_img, vendor_boot_img,
+				ret = android_image_get_ramdisk(ramdisk_img, vendor_boot_img,
 								rd_datap, rd_lenp);
 				unmap_sysmem(vendor_boot_img);
 				unmap_sysmem(boot_img);
diff --git a/cmd/abootimg.c b/cmd/abootimg.c
index e68c523705..7c450a3b2d 100644
--- a/cmd/abootimg.c
+++ b/cmd/abootimg.c
@@ -17,6 +17,7 @@
 
 /* Please use abootimg_addr() macro to obtain the boot image address */
 static ulong _abootimg_addr = -1;
+static ulong _ainit_bootimg_addr = -1;
 static ulong _avendor_bootimg_addr = -1;
 
 ulong get_abootimg_addr(void)
@@ -24,6 +25,11 @@ ulong get_abootimg_addr(void)
 	return (_abootimg_addr == -1 ? image_load_addr : _abootimg_addr);
 }
 
+ulong get_ainit_bootimg_addr(void)
+{
+	return _ainit_bootimg_addr;
+}
+
 ulong get_avendor_bootimg_addr(void)
 {
 	return _avendor_bootimg_addr;
@@ -209,7 +215,7 @@ static int do_abootimg_addr(struct cmd_tbl *cmdtp, int flag, int argc,
 	char *endp;
 	ulong img_addr;
 
-	if (argc < 2 || argc > 3)
+	if (argc < 2 || argc > 4)
 		return CMD_RET_USAGE;
 
 	img_addr = hextoul(argv[1], &endp);
@@ -220,16 +226,26 @@ static int do_abootimg_addr(struct cmd_tbl *cmdtp, int flag, int argc,
 
 	_abootimg_addr = img_addr;
 
-	if (argc == 3) {
+	if (argc > 2) {
 		img_addr = simple_strtoul(argv[2], &endp, 16);
 		if (*endp != '\0') {
-			printf("Error: Wrong vendor image address\n");
+			printf("Error: Wrong vendor_boot image address\n");
 			return CMD_RET_FAILURE;
 		}
 
 		_avendor_bootimg_addr = img_addr;
 	}
 
+	if (argc == 4) {
+		img_addr = simple_strtoul(argv[3], &endp, 16);
+		if (*endp != '\0') {
+			printf("Error: Wrong init_boot image address\n");
+			return CMD_RET_FAILURE;
+		}
+
+		_ainit_bootimg_addr = img_addr;
+	}
+
 	return CMD_RET_SUCCESS;
 }
 
@@ -346,7 +362,7 @@ fail:
 }
 
 static struct cmd_tbl cmd_abootimg_sub[] = {
-	U_BOOT_CMD_MKENT(addr, 3, 1, do_abootimg_addr, "", ""),
+	U_BOOT_CMD_MKENT(addr, 4, 1, do_abootimg_addr, "", ""),
 	U_BOOT_CMD_MKENT(dump, 2, 1, do_abootimg_dump, "", ""),
 	U_BOOT_CMD_MKENT(get, 5, 1, do_abootimg_get, "", ""),
 	U_BOOT_CMD_MKENT(load, 5, 1, do_abootimg_load, "", ""),
@@ -375,7 +391,7 @@ static int do_abootimg(struct cmd_tbl *cmdtp, int flag, int argc,
 U_BOOT_CMD(
 	abootimg, CONFIG_SYS_MAXARGS, 0, do_abootimg,
 	"manipulate Android Boot Image",
-	"addr <boot_img_addr> [<vendor_boot_img_addr>]>\n"
+	"addr <boot_img_addr> [<vendor_boot_img_addr> [<init_boot_img_addr>]]\n"
 	"    - set the address in RAM where boot image is located\n"
 	"      ($loadaddr is used by default)\n"
 	"abootimg dump dtb\n"
diff --git a/include/image.h b/include/image.h
index be3c73a72e..b1fd6b3149 100644
--- a/include/image.h
+++ b/include/image.h
@@ -1982,6 +1982,13 @@ bool is_android_vendor_boot_image_header(const void *vendor_boot_img);
  */
 ulong get_abootimg_addr(void);
 
+/**
+ * get_ainit_bootimg_addr() - Get Android init boot image address
+ *
+ * Return: Android init boot image address
+ */
+ulong get_ainit_bootimg_addr(void);
+
 /**
  * get_avendor_bootimg_addr() - Get Android vendor boot image address
  *
-- 
2.40.1