bootstd: Add test for Android boot image v2

Rename actual android bootmethod test to specify it's for boot image
version 4.
Add a unit test for testing the Android bootmethod with boot image
version 2.

This requires another mmc image (mmc8) to contain the following
partitions:
- misc: contains the Bootloader Control Block (BCB)
- boot_a: contains a fake generic kernel image

we can test this with:

$ ./test/py/test.py --bd sandbox --build -k test_ut # build the mmc8.img
$ ./test/py/test.py --bd sandbox --build -k bootflow_android

Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
Link: https://lore.kernel.org/r/20241126-adnroidv2-v4-5-11636106dc69@baylibre.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

arch/sandbox/dts/test.dts

@@ -44,6 +44,7 @@
 		mmc5 = "/mmc5";
 		mmc6 = "/mmc6";
 		mmc7 = "/mmc7";
+		mmc8 = "/mmc8";
 		pci0 = &pci0;
 		pci1 = &pci1;
 		pci2 = &pci2;
@@ -1138,13 +1139,20 @@
 		filename = "mmc6.img";
 	};
 
-	/* This is used for Android tests */
+	/* This is used for Android boot image v4 tests */
 	mmc7 {
 		status = "disabled";
 		compatible = "sandbox,mmc";
 		filename = "mmc7.img";
 	};
 
+	/* This is used for Android boot image v2 tests. */
+	mmc8 {
+		status = "disabled";
+		compatible = "sandbox,mmc";
+		filename = "mmc8.img";
+	};
+
 	pch {
 		compatible = "sandbox,pch";
 	};

test/boot/bootflow.c

@@ -1199,8 +1199,8 @@ static int bootflow_cros(struct unit_test_state *uts)
 }
 BOOTSTD_TEST(bootflow_cros, UTF_CONSOLE | UTF_DM | UTF_SCAN_FDT);
 
-/* Test Android bootmeth  */
+/* Test Android bootmeth  with boot image version 4 */
-static int bootflow_android(struct unit_test_state *uts)
+static int bootflow_android_image_v4(struct unit_test_state *uts)
 {
 	if (!IS_ENABLED(CONFIG_BOOTMETH_ANDROID))
 		return -EAGAIN;
@@ -1220,7 +1220,30 @@ static int bootflow_android(struct unit_test_state *uts)
 
 	return 0;
 }
-BOOTSTD_TEST(bootflow_android, UTF_CONSOLE | UTF_DM | UTF_SCAN_FDT);
+BOOTSTD_TEST(bootflow_android_image_v4, UTF_CONSOLE | UTF_DM | UTF_SCAN_FDT);
+
+/* Test Android bootmeth with boot image version 2 */
+static int bootflow_android_image_v2(struct unit_test_state *uts)
+{
+	if (!IS_ENABLED(CONFIG_BOOTMETH_ANDROID))
+		return -EAGAIN;
+
+	ut_assertok(scan_mmc_android_bootdev(uts, "mmc8"));
+	ut_assertok(run_command("bootflow list", 0));
+
+	ut_assert_nextlinen("Showing all");
+	ut_assert_nextlinen("Seq");
+	ut_assert_nextlinen("---");
+	ut_assert_nextlinen("  0  extlinux");
+	ut_assert_nextlinen("  1  android      ready   mmc          0  mmc8.bootdev.whole        ");
+	ut_assert_nextlinen("---");
+	ut_assert_skip_to_line("(2 bootflows, 2 valid)");
+
+	ut_assert_console_end();
+
+	return 0;
+}
+BOOTSTD_TEST(bootflow_android_image_v2, UTF_CONSOLE | UTF_DM | UTF_SCAN_FDT);
 
 /* Test EFI bootmeth */
 static int bootflow_efi(struct unit_test_state *uts)

test/py/tests/test_ut.py

@@ -501,6 +501,55 @@ def setup_android_image(cons):
 
     print(f'wrote to {fname}')
 
+    mmc_dev = 8
+    fname = os.path.join(cons.config.source_dir, f'mmc{mmc_dev}.img')
+    u_boot_utils.run_and_log(cons, f'qemu-img create {fname} 20M')
+    u_boot_utils.run_and_log(cons, f'cgpt create {fname}')
+
+    ptr = 40
+
+    # Number of sectors in 1MB
+    sect_size = 512
+    sect_1mb = (1 << 20) // sect_size
+
+    required_parts = [
+        {'num': 1, 'label':'misc', 'size': '1M'},
+        {'num': 2, 'label':'boot_a', 'size': '4M'},
+        {'num': 3, 'label':'boot_b', 'size': '4M'},
+    ]
+
+    for part in required_parts:
+        size_str = part['size']
+        if 'M' in size_str:
+            size = int(size_str[:-1]) * sect_1mb
+        else:
+            size = int(size_str)
+        u_boot_utils.run_and_log(
+            cons,
+            f"cgpt add -i {part['num']} -b {ptr} -s {size} -l {part['label']} -t basicdata {fname}")
+        ptr += size
+
+    u_boot_utils.run_and_log(cons, f'cgpt boot -p {fname}')
+    out = u_boot_utils.run_and_log(cons, f'cgpt show -q {fname}')
+
+    # Create a dict (indexed by partition number) containing the above info
+    for line in out.splitlines():
+        start, size, num, name = line.split(maxsplit=3)
+        parts[int(num)] = Partition(int(start), int(size), name)
+
+    with open(fname, 'rb') as inf:
+        disk_data = inf.read()
+
+    test_abootimg.AbootimgTestDiskImage(cons, 'boot.img', test_abootimg.img_hex)
+    boot_img = os.path.join(cons.config.result_dir, 'boot.img')
+    with open(boot_img, 'rb') as inf:
+        set_part_data(2, inf.read())
+
+    with open(fname, 'wb') as outf:
+        outf.write(disk_data)
+
+    print(f'wrote to {fname}')
+
     return fname
 
 def setup_cedit_file(cons):