bootstd: android: don't read whole partition sizes
The current implementation is reading the whole partition for boot and
vendor_boot image which can be long following the size of the
partition or the time to read blocks (driver/SoC specific).
For example with mediatek mt8365 EVK board, we have a 64MiB boot
partition and the boot image flashed in this partition is only 42MiB.
It takes ~8-9 secs to read the boot partition.
Instead we can retrieved the boot image and vendor boot image size
with these new functions:
- android_image_get_bootimg_size
- android_image_get_vendor_bootimg_size
Use these information and read only the necessary.
By doing this with mt8365 EVK board, we read boot image in ~5 secs.
Signed-off-by: Julien Masson <jmasson@baylibre.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20241121-bootmeth-android-part-sizes-v1-1-25760bbd0f08@baylibre.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/boot/image-android.c b/boot/image-android.c
index cd01278..93b54bf 100644
--- a/boot/image-android.c
+++ b/boot/image-android.c
@@ -178,6 +178,51 @@
data->boot_img_total_size = end - (ulong)hdr;
}
+bool android_image_get_bootimg_size(const void *hdr, u32 *boot_img_size)
+{
+ struct andr_image_data data;
+
+ if (!hdr || !boot_img_size) {
+ printf("hdr or boot_img_size can't be NULL\n");
+ return false;
+ }
+
+ if (!is_android_boot_image_header(hdr)) {
+ printf("Incorrect boot image header\n");
+ return false;
+ }
+
+ if (((struct andr_boot_img_hdr_v0 *)hdr)->header_version <= 2)
+ android_boot_image_v0_v1_v2_parse_hdr(hdr, &data);
+ else
+ android_boot_image_v3_v4_parse_hdr(hdr, &data);
+
+ *boot_img_size = data.boot_img_total_size;
+
+ return true;
+}
+
+bool android_image_get_vendor_bootimg_size(const void *hdr, u32 *vendor_boot_img_size)
+{
+ struct andr_image_data data;
+
+ if (!hdr || !vendor_boot_img_size) {
+ printf("hdr or vendor_boot_img_size can't be NULL\n");
+ return false;
+ }
+
+ if (!is_android_vendor_boot_image_header(hdr)) {
+ printf("Incorrect vendor boot image header\n");
+ return false;
+ }
+
+ android_vendor_boot_image_v3_v4_parse_hdr(hdr, &data);
+
+ *vendor_boot_img_size = data.vendor_boot_img_total_size;
+
+ return true;
+}
+
bool android_image_get_data(const void *boot_hdr, const void *vendor_boot_hdr,
struct andr_image_data *data)
{