Hi Roman,
On Sun, May 19, 2024 at 9:19 PM Roman Stratiienko
<r.stratiie...@gmail.com> wrote:
>
> Load only part of the boot partition that contains valuable
> information, thus improving the boot time.
>
> Signed-off-by: Roman Stratiienko <r.stratiie...@gmail.com>
> ---
> boot/image-android.c | 70 ++++++++++++++++++++++++++++++++++++++++++++
> cmd/abootimg.c | 40 ++++++++++++++++++++++---
> include/image.h | 12 ++++++++
> 3 files changed, 118 insertions(+), 4 deletions(-)
>
> diff --git a/boot/image-android.c b/boot/image-android.c
> index da8003f370..d00a896a40 100644
> --- a/boot/image-android.c
> +++ b/boot/image-android.c
> @@ -204,6 +204,76 @@ bool android_image_get_data(const void *boot_hdr, const
> void *vendor_boot_hdr,
> return true;
> }
>
> +/**
> + * android_image_get_valuable_size() - get the size of the android image
> + *
> + * This function checks if the image is Android boot image and returns the
> + * valuable size of the image.
> + *
> + * @hdr_addr: Boot image header address (boot or vendor_boot)
> + *
> + * @return size of the image on success, 0 on failure
> + */
> +size_t android_image_get_valuable_size(const void *hdr_addr)
> +{
> + int version, size;
> +
> + if (is_android_boot_image_header(hdr_addr)) {
> + const struct andr_boot_img_hdr_v0 *hdr = hdr_addr;
> +
> + version = ((struct andr_boot_img_hdr_v0
> *)hdr_addr)->header_version;
> + if (version > 2) {
> + const struct andr_boot_img_hdr_v3 *hdr = hdr_addr;
> +
> + size = ALIGN(hdr->header_size, ANDR_GKI_PAGE_SIZE);
> + size += ALIGN(hdr->kernel_size, ANDR_GKI_PAGE_SIZE);
> + size += ALIGN(hdr->ramdisk_size, ANDR_GKI_PAGE_SIZE);
> +
> + if (version > 3)
> + size += ALIGN(hdr->signature_size,
> ANDR_GKI_PAGE_SIZE);
> +
> + return size;
> + }
> +
> + size = hdr->page_size;
> + size += ALIGN(hdr->kernel_size, hdr->page_size);
> + size += ALIGN(hdr->ramdisk_size, hdr->page_size);
> + size += ALIGN(hdr->second_size, hdr->page_size);
> +
> + if (version > 0)
> + size += ALIGN(hdr->recovery_dtbo_size,
> hdr->page_size);
> +
> + if (version > 1)
> + size += ALIGN(hdr->dtb_size, hdr->page_size);
> +
> + return size;
> + }
> +
> + if (is_android_vendor_boot_image_header(hdr_addr)) {
> + const struct andr_vnd_boot_img_hdr *hdr = hdr_addr;
> +
> + version = ((struct andr_vnd_boot_img_hdr
> *)hdr_addr)->header_version;
> + if (version < 3) {
> + printf("Vendor boot image header version %d is not
> supported\n", version);
> +
> + return 0;
> + }
> +
> + size = ALIGN(hdr->header_size, hdr->page_size);
> + size += ALIGN(hdr->vendor_ramdisk_size, hdr->page_size);
> + size += ALIGN(hdr->dtb_size, hdr->page_size);
> +
> + if (version > 3) {
> + size += ALIGN(hdr->vendor_ramdisk_table_size,
> hdr->page_size);
> + size += ALIGN(hdr->bootconfig_size, hdr->page_size);
> + }
> +
> + return size;
> + }
> +
> + return 0;
Can we split this function on two, for example:
android_boot_image_get_valuable_size()
android_vendor_image_get_valuable_size(),
Then check image type in abootimg_smart_load() and call proper function
accordingly?
> +}
> +
> static ulong android_image_get_kernel_addr(struct andr_image_data *img_data)
> {
> /*
> diff --git a/cmd/abootimg.c b/cmd/abootimg.c
> index 808c9c4941..fe7c5c5e2c 100644
> --- a/cmd/abootimg.c
> +++ b/cmd/abootimg.c
> @@ -182,6 +182,35 @@ static int abootimg_get_dtb(int argc, char *const argv[])
> return CMD_RET_USAGE;
> }
>
> +static int abootimg_smart_load(struct blk_desc *desc, struct disk_partition
> *info, void *addr)
> +{
> + int ret, size;
> +
> + ret = blk_dread(desc, info->start, 4096 / info->blksz, addr);
> + if (ret < 0) {
> + printf("Error: Failed to read partition\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + size = android_image_get_valuable_size(addr);
> + if (size == 0)
> + return 0;
> +
> + ret = blk_dread(desc, info->start, DIV_ROUND_UP(size, info->blksz),
> addr);
> + if (ret < 0) {
> + printf("Error: Failed to read partition\n");
> + return CMD_RET_FAILURE;
> + }
> +
> + memset(addr + size, 0, info->size * info->blksz - size);
> +
> + printf("Loaded Android boot image using smart load (%d/%d MB)\n",
> + (int)DIV_ROUND_UP(size, 1024 * 1024),
> + (int)DIV_ROUND_UP(info->size * info->blksz, 1024 * 1024));
> +
> + return size;
> +}
> +
> static int do_abootimg_addr(struct cmd_tbl *cmdtp, int flag, int argc,
> char *const argv[])
> {
> @@ -299,10 +328,13 @@ static int do_abootimg_load(struct cmd_tbl *cmdtp, int
> flag, int argc,
> return CMD_RET_FAILURE;
> }
>
> - ret = blk_dread(desc, info.start, info.size, addr);
> - if (ret < 0) {
> - printf("Error: Failed to read partition %s\n", buf);
> - goto fail;
> + ret = abootimg_smart_load(desc, &info, addr);
> + if (ret <= 0) {
> + ret = blk_dread(desc, info.start, info.size, addr);
> + if (ret < 0) {
> + printf("Error: Failed to read partition %s\n", buf);
> + goto fail;
> + }
> }
>
> sprintf(buf, "abootimg_%s_ptr", argv[3]);
> diff --git a/include/image.h b/include/image.h
> index c5b288f62b..7d8ff40c3f 100644
> --- a/include/image.h
> +++ b/include/image.h
> @@ -1826,6 +1826,18 @@ struct andr_image_data;
> bool android_image_get_data(const void *boot_hdr, const void
> *vendor_boot_hdr,
> struct andr_image_data *data);
>
> +/**
> + * android_image_get_valuable_size() - get the size of the android image
> + *
> + * This function checks if the image is Android boot image and returns the
> + * valuable size of the image.
> + *
> + * @hdr_addr: Boot image header address (boot or vendor_boot)
> + *
> + * @return size of the image on success, 0 on failure
> + */
> +size_t android_image_get_valuable_size(const void *hdr_addr);
> +
> struct andr_boot_img_hdr_v0;
>
> /**
> --
> 2.40.1
>
--
Best regards - Atentamente - Meilleures salutations
Igor Opaniuk
mailto: igor.opan...@gmail.com
skype: igor.opanyuk
https://www.linkedin.com/in/iopaniuk
