From d71a732af45e2d3acef92649f4f7986a83175cf4 Mon Sep 17 00:00:00 2001 From: Safae Ouajih Date: Mon, 6 Feb 2023 00:50:03 +0100 Subject: android: boot: rename andr_img_hdr -> andr_boot_img_hdr_v0 Android introduced boot header version 3 or 4. The header structure change with version 3 and 4 to support the new updates such as: - Introducing Vendor boot image: with a vendor ramdisk - Bootconfig feature (v4) Change andr_img_hdr struct name to maintain support for version v0, v1 and v2 while introducing version 3 and 4. Signed-off-by: Safae Ouajih Reviewed-by: Simon Glass Reviewed-by: Mattijs Korpershoek Tested-by: Mattijs Korpershoek --- include/android_image.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/android_image.h') diff --git a/include/android_image.h b/include/android_image.h index 54d25af0684..2bdcab9122d 100644 --- a/include/android_image.h +++ b/include/android_image.h @@ -20,9 +20,9 @@ #define ANDR_BOOT_ARGS_SIZE 512 #define ANDR_BOOT_EXTRA_ARGS_SIZE 1024 -/* The bootloader expects the structure of andr_img_hdr with header +/* The bootloader expects the structure of andr_boot_img_hdr_v0 with header * version 0 to be as follows: */ -struct andr_img_hdr { +struct andr_boot_img_hdr_v0 { /* Must be ANDR_BOOT_MAGIC. */ char magic[ANDR_BOOT_MAGIC_SIZE]; -- cgit v1.2.3 From fbb645e7d9bc1a0da05fff8421d398c8aa43a331 Mon Sep 17 00:00:00 2001 From: Safae Ouajih Date: Mon, 6 Feb 2023 00:50:06 +0100 Subject: android: boot: add boot image header v3 and v4 structures Add support for v3/v4 boot image format by adding the following structures: - andr_boot_img_hdr_v3 : describes boot image header - andr_vnd_boot_img_hdr : describes vendor boot image header These definitions have been copied over from the AOSP documentation at [1] and [2] Boot arg sizes are taken from [3]: commit: 35fb6262bc3f (ANDROID: Support for vendor boot) This also adds documentation for boot image header v3/v4 structure that was imported from [4], file: include/bootimg/bootimg.h commit: 8d0922bfb932 (Adding GKI signature in boot.img v4) Link:[1] https://source.android.com/docs/core/architecture/bootloader/boot-image-header Link:[2] https://source.android.com/docs/core/architecture/bootloader/partitions/vendor-boot-partitions#vendor-boot-header Link:[3] https://android.googlesource.com/platform/external/u-boot Link:[4] https://android.googlesource.com/platform/system/tools/mkbootimg Signed-off-by: Safae Ouajih Reviewed-by: Simon Glass Reviewed-by: Mattijs Korpershoek Tested-by: Mattijs Korpershoek --- include/android_image.h | 183 +++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 182 insertions(+), 1 deletion(-) (limited to 'include/android_image.h') diff --git a/include/android_image.h b/include/android_image.h index 2bdcab9122d..f0543630019 100644 --- a/include/android_image.h +++ b/include/android_image.h @@ -3,7 +3,7 @@ * This is from the Android Project, * Repository: https://android.googlesource.com/platform/system/tools/mkbootimg * File: include/bootimg/bootimg.h - * Commit: e55998a0f2b61b685d5eb4a486ca3a0c680b1a2f + * Commit: cce5b1923e3cd2fcb765b512610bdc5c42bc501d * * Copyright (C) 2007 The Android Open Source Project */ @@ -14,11 +14,58 @@ #include #include +#define ANDR_GKI_PAGE_SIZE 4096 #define ANDR_BOOT_MAGIC "ANDROID!" #define ANDR_BOOT_MAGIC_SIZE 8 #define ANDR_BOOT_NAME_SIZE 16 #define ANDR_BOOT_ARGS_SIZE 512 #define ANDR_BOOT_EXTRA_ARGS_SIZE 1024 +#define VENDOR_BOOT_MAGIC "VNDRBOOT" +#define ANDR_VENDOR_BOOT_MAGIC_SIZE 8 +#define ANDR_VENDOR_BOOT_ARGS_SIZE 2048 +#define ANDR_VENDOR_BOOT_NAME_SIZE 16 + +struct andr_boot_img_hdr_v3 { + u8 magic[ANDR_BOOT_MAGIC_SIZE]; + + u32 kernel_size; /* size in bytes */ + u32 ramdisk_size; /* size in bytes */ + + u32 os_version; + + u32 header_size; /* size of boot image header in bytes */ + u32 reserved[4]; + u32 header_version; /* offset remains constant for version check */ + + u8 cmdline[ANDR_BOOT_ARGS_SIZE + ANDR_BOOT_EXTRA_ARGS_SIZE]; + /* for boot image header v4 only */ + u32 signature_size; /* size in bytes */ +}; + +struct andr_vnd_boot_img_hdr { + u8 magic[ANDR_VENDOR_BOOT_MAGIC_SIZE]; + u32 header_version; + u32 page_size; /* flash page size we assume */ + + u32 kernel_addr; /* physical load addr */ + u32 ramdisk_addr; /* physical load addr */ + + u32 vendor_ramdisk_size; /* size in bytes */ + + u8 cmdline[ANDR_VENDOR_BOOT_ARGS_SIZE]; + + u32 tags_addr; /* physical addr for kernel tags */ + + u8 name[ANDR_VENDOR_BOOT_NAME_SIZE]; /* asciiz product name */ + u32 header_size; /* size of vendor boot image header in bytes */ + u32 dtb_size; /* size of dtb image */ + u64 dtb_addr; /* physical load address */ + /* for boot image header v4 only */ + u32 vendor_ramdisk_table_size; /* size in bytes for the vendor ramdisk table */ + u32 vendor_ramdisk_table_entry_num; /* number of entries in the vendor ramdisk table */ + u32 vendor_ramdisk_table_entry_size; /* size in bytes for a vendor ramdisk table entry */ + u32 bootconfig_size; /* size in bytes for the bootconfig section */ +}; /* The bootloader expects the structure of andr_boot_img_hdr_v0 with header * version 0 to be as follows: */ @@ -136,4 +183,138 @@ struct andr_boot_img_hdr_v0 { * else: jump to kernel_addr */ +/* When the boot image header has a version of 3, the structure of the boot + * image is as follows: + * + * +---------------------+ + * | boot header | 4096 bytes + * +---------------------+ + * | kernel | m pages + * +---------------------+ + * | ramdisk | n pages + * +---------------------+ + * + * m = (kernel_size + 4096 - 1) / 4096 + * n = (ramdisk_size + 4096 - 1) / 4096 + * + * Note that in version 3 of the boot image header, page size is fixed at 4096 bytes. + * + * The structure of the vendor boot image (introduced with version 3 and + * required to be present when a v3 boot image is used) is as follows: + * + * +---------------------+ + * | vendor boot header | o pages + * +---------------------+ + * | vendor ramdisk | p pages + * +---------------------+ + * | dtb | q pages + * +---------------------+ + * o = (2112 + page_size - 1) / page_size + * p = (vendor_ramdisk_size + page_size - 1) / page_size + * q = (dtb_size + page_size - 1) / page_size + * + * 0. all entities in the boot image are 4096-byte aligned in flash, all + * entities in the vendor boot image are page_size (determined by the vendor + * and specified in the vendor boot image header) aligned in flash + * 1. kernel, ramdisk, vendor ramdisk, and DTB are required (size != 0) + * 2. load the kernel and DTB at the specified physical address (kernel_addr, + * dtb_addr) + * 3. load the vendor ramdisk at ramdisk_addr + * 4. load the generic ramdisk immediately following the vendor ramdisk in + * memory + * 5. set up registers for kernel entry as required by your architecture + * 6. if the platform has a second stage bootloader jump to it (must be + * contained outside boot and vendor boot partitions), otherwise + * jump to kernel_addr + */ + +/* When the boot image header has a version of 4, the structure of the boot + * image is as follows: + * + * +---------------------+ + * | boot header | 4096 bytes + * +---------------------+ + * | kernel | m pages + * +---------------------+ + * | ramdisk | n pages + * +---------------------+ + * | boot signature | g pages + * +---------------------+ + * + * m = (kernel_size + 4096 - 1) / 4096 + * n = (ramdisk_size + 4096 - 1) / 4096 + * g = (signature_size + 4096 - 1) / 4096 + * + * Note that in version 4 of the boot image header, page size is fixed at 4096 + * bytes. + * + * The structure of the vendor boot image version 4, which is required to be + * present when a version 4 boot image is used, is as follows: + * + * +------------------------+ + * | vendor boot header | o pages + * +------------------------+ + * | vendor ramdisk section | p pages + * +------------------------+ + * | dtb | q pages + * +------------------------+ + * | vendor ramdisk table | r pages + * +------------------------+ + * | bootconfig | s pages + * +------------------------+ + * + * o = (2128 + page_size - 1) / page_size + * p = (vendor_ramdisk_size + page_size - 1) / page_size + * q = (dtb_size + page_size - 1) / page_size + * r = (vendor_ramdisk_table_size + page_size - 1) / page_size + * s = (vendor_bootconfig_size + page_size - 1) / page_size + * + * Note that in version 4 of the vendor boot image, multiple vendor ramdisks can + * be included in the vendor boot image. The bootloader can select a subset of + * ramdisks to load at runtime. To help the bootloader select the ramdisks, each + * ramdisk is tagged with a type tag and a set of hardware identifiers + * describing the board, soc or platform that this ramdisk is intended for. + * + * The vendor ramdisk section is consist of multiple ramdisk images concatenated + * one after another, and vendor_ramdisk_size is the size of the section, which + * is the total size of all the ramdisks included in the vendor boot image. + * + * The vendor ramdisk table holds the size, offset, type, name and hardware + * identifiers of each ramdisk. The type field denotes the type of its content. + * The vendor ramdisk names are unique. The hardware identifiers are specified + * in the board_id field in each table entry. The board_id field is consist of a + * vector of unsigned integer words, and the encoding scheme is defined by the + * hardware vendor. + * + * For the different type of ramdisks, there are: + * - VENDOR_RAMDISK_TYPE_NONE indicates the value is unspecified. + * - VENDOR_RAMDISK_TYPE_PLATFORM ramdisks contain platform specific bits, so + * the bootloader should always load these into memory. + * - VENDOR_RAMDISK_TYPE_RECOVERY ramdisks contain recovery resources, so + * the bootloader should load these when booting into recovery. + * - VENDOR_RAMDISK_TYPE_DLKM ramdisks contain dynamic loadable kernel + * modules. + * + * Version 4 of the vendor boot image also adds a bootconfig section to the end + * of the image. This section contains Boot Configuration parameters known at + * build time. The bootloader is responsible for placing this section directly + * after the generic ramdisk, followed by the bootconfig trailer, before + * entering the kernel. + * + * 0. all entities in the boot image are 4096-byte aligned in flash, all + * entities in the vendor boot image are page_size (determined by the vendor + * and specified in the vendor boot image header) aligned in flash + * 1. kernel, ramdisk, and DTB are required (size != 0) + * 2. load the kernel and DTB at the specified physical address (kernel_addr, + * dtb_addr) + * 3. load the vendor ramdisks at ramdisk_addr + * 4. load the generic ramdisk immediately following the vendor ramdisk in + * memory + * 5. load the bootconfig immediately following the generic ramdisk. Add + * additional bootconfig parameters followed by the bootconfig trailer. + * 6. set up registers for kernel entry as required by your architecture + * 7. if the platform has a second stage bootloader jump to it (must be + * contained outside boot and vendor boot partitions), otherwise + * jump to kernel_addr + */ #endif -- cgit v1.2.3 From f48efa0edb6f65b2c382209871df7c9b61a905e2 Mon Sep 17 00:00:00 2001 From: Safae Ouajih Date: Mon, 6 Feb 2023 00:50:07 +0100 Subject: android: boot: kcomp: support andr_image_data andr_image_data structure is used as a global representation of boot image header structure. Introduce this new structure to support all boot header versions : v0,v1.v2.v3.v4 and to support v3 and v4 while maitaining support for v0,v1,v2. The need of using andr_image_data comes from the change of header structure in both version 3 and 4. Rework android_image_get_kcomp() to support this new struct. Signed-off-by: Safae Ouajih Reviewed-by: Simon Glass Reviewed-by: Mattijs Korpershoek Tested-by: Mattijs Korpershoek --- include/android_image.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'include/android_image.h') diff --git a/include/android_image.h b/include/android_image.h index f0543630019..fb3a9d9858b 100644 --- a/include/android_image.h +++ b/include/android_image.h @@ -317,4 +317,31 @@ struct andr_boot_img_hdr_v0 { * contained outside boot and vendor boot partitions), otherwise * jump to kernel_addr */ + +/* Private struct */ +struct andr_image_data { + ulong kernel_ptr; /* kernel address */ + u32 kernel_size; /* size in bytes */ + u32 ramdisk_size; /* size in bytes */ + u32 boot_ramdisk_size; /* size in bytes */ + ulong second_ptr; /* secondary bootloader address */ + u32 second_size; /* secondary bootloader size */ + ulong dtb_ptr; /* address of dtb image */ + u32 dtb_size; /* size of dtb image */ + ulong recovery_dtbo_ptr; /* size in bytes for recovery DTBO/ACPIO image */ + u32 recovery_dtbo_size; /* offset to recovery dtbo/acpio in boot image */ + + const char *kcmdline; /* boot kernel cmdline */ + const char *kcmdline_extra; /* vendor-boot extra kernel cmdline */ + const char *image_name; /* asciiz product name */ + + u32 kernel_addr; /* physical load addr */ + ulong ramdisk_addr; /* physical load addr */ + ulong ramdisk_ptr; /* ramdisk address */ + ulong dtb_load_addr; /* physical load address for DTB image */ + ulong tags_addr; /* physical addr for kernel tags */ + u32 header_version; /* version of the boot image header */ + u32 boot_img_total_size; /* boot image size */ +}; + #endif -- cgit v1.2.3 From 1115027d2f75ade805f0d4d44a6a2c21e74ea6b2 Mon Sep 17 00:00:00 2001 From: Safae Ouajih Date: Mon, 6 Feb 2023 00:50:12 +0100 Subject: android: boot: update android_image_get_data to support v3, v4 Since boot image header version 3 and 4 introduced vendor boot image, use the following functions to fill the generic android structure : andr_image_data: - android_boot_image_v3_v4_parse_hdr() - android_vendor_boot_image_v3_v4_parse_hdr() Update android_image_get_data() to support v3 and v4 Signed-off-by: Safae Ouajih Reviewed-by: Simon Glass Reviewed-by: Mattijs Korpershoek Tested-by: Mattijs Korpershoek --- include/android_image.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/android_image.h') diff --git a/include/android_image.h b/include/android_image.h index fb3a9d9858b..99e78035082 100644 --- a/include/android_image.h +++ b/include/android_image.h @@ -323,6 +323,8 @@ struct andr_image_data { ulong kernel_ptr; /* kernel address */ u32 kernel_size; /* size in bytes */ u32 ramdisk_size; /* size in bytes */ + ulong vendor_ramdisk_ptr; /* vendor ramdisk address */ + u32 vendor_ramdisk_size; /* vendor ramdisk size*/ u32 boot_ramdisk_size; /* size in bytes */ ulong second_ptr; /* secondary bootloader address */ u32 second_size; /* secondary bootloader size */ @@ -342,6 +344,7 @@ struct andr_image_data { ulong tags_addr; /* physical addr for kernel tags */ u32 header_version; /* version of the boot image header */ u32 boot_img_total_size; /* boot image size */ + u32 vendor_boot_img_total_size; /* vendor boot image size */ }; #endif -- cgit v1.2.3 From 57e405e1f4745cdca49a4a6b260afe68592b1d5c Mon Sep 17 00:00:00 2001 From: Safae Ouajih Date: Mon, 6 Feb 2023 00:50:18 +0100 Subject: android: boot: support bootconfig Support Bootconfig feature. - The bootconfig feature replaces the androidboot.* kernel cmdline options. This was adapted from downstream [1] commit : 7af0a0506d4d ("cuttlefish: support bootconfig parameters"). Link:[1] https://android.googlesource.com/platform/external/u-boot/ Signed-off-by: Safae Ouajih Reviewed-by: Simon Glass Reviewed-by: Mattijs Korpershoek Tested-by: Mattijs Korpershoek --- include/android_image.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/android_image.h') diff --git a/include/android_image.h b/include/android_image.h index 99e78035082..d503c980b23 100644 --- a/include/android_image.h +++ b/include/android_image.h @@ -25,6 +25,14 @@ #define ANDR_VENDOR_BOOT_ARGS_SIZE 2048 #define ANDR_VENDOR_BOOT_NAME_SIZE 16 +#define BOOTCONFIG_MAGIC "#BOOTCONFIG\n" +#define BOOTCONFIG_MAGIC_SIZE 12 +#define BOOTCONFIG_SIZE_SIZE 4 +#define BOOTCONFIG_CHECKSUM_SIZE 4 +#define BOOTCONFIG_TRAILER_SIZE BOOTCONFIG_MAGIC_SIZE + \ + BOOTCONFIG_SIZE_SIZE + \ + BOOTCONFIG_CHECKSUM_SIZE + struct andr_boot_img_hdr_v3 { u8 magic[ANDR_BOOT_MAGIC_SIZE]; @@ -337,6 +345,9 @@ struct andr_image_data { const char *kcmdline_extra; /* vendor-boot extra kernel cmdline */ const char *image_name; /* asciiz product name */ + ulong bootconfig_addr; /* bootconfig image address */ + ulong bootconfig_size; /* bootconfig image size */ + u32 kernel_addr; /* physical load addr */ ulong ramdisk_addr; /* physical load addr */ ulong ramdisk_ptr; /* ramdisk address */ -- cgit v1.2.3