add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 u-boot/common/android_ab.c
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@@ -406,7 +406,7 @@
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 	return 0;
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 }
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-void ab_update_root_uuid(void)
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+static void ab_update_root_uuid(void)
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 {
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 	/*
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 	 * In android a/b & avb process, the system.img is mandory and the
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@@ -441,6 +441,60 @@
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 	}
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 }
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+void ab_update_root_partition(void)
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+{
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+	char *boot_args = env_get("bootargs");
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+	char root_part_dev[64] = {0};
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+	disk_partition_t part_info;
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+	struct blk_desc *dev_desc;
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+	const char *part_type;
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+	int part_num;
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+
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+	dev_desc = rockchip_get_bootdev();
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+	if (!dev_desc)
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+		return;
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+
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+	if (ab_is_support_dynamic_partition(dev_desc))
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+		return;
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+
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+	/* Get 'system' partition device number. */
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+	part_num = part_get_info_by_name(dev_desc, ANDROID_PARTITION_SYSTEM, &part_info);
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+	if (part_num < 0) {
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+		printf("%s: Failed to get partition '%s'.\n", __func__, ANDROID_PARTITION_SYSTEM);
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+		return;
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+	}
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+
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+	/* Get partition type. */
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+	part_type = part_get_type(dev_desc);
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+	if (!part_type)
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+		return;
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+
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+	/* Judge the partition device type. */
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+	switch (dev_desc->if_type) {
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+	case IF_TYPE_MMC:
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+		if (strstr(part_type, "ENV"))
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+			snprintf(root_part_dev, 64, "root=/dev/mmcblk0p%d", part_num);
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+		else if (strstr(part_type, "EFI"))
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+			ab_update_root_uuid();
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+		break;
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+	case IF_TYPE_MTD:
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+		if (dev_desc->devnum == BLK_MTD_NAND || dev_desc->devnum == BLK_MTD_SPI_NAND) {
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+			if (strstr(boot_args, "rootfstype=squashfs") || strstr(boot_args, "rootfstype=erofs"))
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+				snprintf(root_part_dev, 64, "ubi.mtd=%d root=/dev/ubiblock0_0", part_num - 1);
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+			else if (strstr(boot_args, "rootfstype=ubifs"))
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+				snprintf(root_part_dev, 64, "ubi.mtd=%d root=ubi0:system", part_num - 1);
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+		} else if (dev_desc->devnum == BLK_MTD_SPI_NOR) {
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+			snprintf(root_part_dev, 64, "root=/dev/mtdblock%d", part_num - 1);
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+		}
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+		break;
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+	default:
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+		printf("%s: Not found part type, failed to set root part device.\n", __func__);
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+		return;
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+	}
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+
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+	env_update("bootargs", root_part_dev);
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+}
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+
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 int ab_get_slot_suffix(char *slot_suffix)
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 {
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 	/* TODO: get from pre-loader or misc partition */