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Diffstat (limited to 'common/image-android.c')
| -rw-r--r-- | common/image-android.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/common/image-android.c b/common/image-android.c new file mode 100644 index 00000000..3564a642 --- /dev/null +++ b/common/image-android.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de> + */ + +#include <common.h> +#include <env.h> +#include <image.h> +#include <android_image.h> +#include <malloc.h> +#include <errno.h> +#include <asm/unaligned.h> + +#define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000 + +static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1]; + +static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr) +{ + /* + * All the Android tools that generate a boot.img use this + * address as the default. + * + * Even though it doesn't really make a lot of sense, and it + * might be valid on some platforms, we treat that adress as + * the default value for this field, and try to execute the + * kernel in place in such a case. + * + * Otherwise, we will return the actual value set by the user. + */ + if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR) + return (ulong)hdr + hdr->page_size; + + return hdr->kernel_addr; +} + +/** + * android_image_get_kernel() - processes kernel part of Android boot images + * @hdr: Pointer to image header, which is at the start + * of the image. + * @verify: Checksum verification flag. Currently unimplemented. + * @os_data: Pointer to a ulong variable, will hold os data start + * address. + * @os_len: Pointer to a ulong variable, will hold os data length. + * + * This function returns the os image's start address and length. Also, + * it appends the kernel command line to the bootargs env variable. + * + * Return: Zero, os start address and length on success, + * otherwise on failure. + */ +int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify, + ulong *os_data, ulong *os_len) +{ + u32 kernel_addr = android_image_get_kernel_addr(hdr); + const struct image_header *ihdr = (const struct image_header *) + ((uintptr_t)hdr + hdr->page_size); + + /* + * Not all Android tools use the id field for signing the image with + * sha1 (or anything) so we don't check it. It is not obvious that the + * string is null terminated so we take care of this. + */ + strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE); + andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0'; + if (strlen(andr_tmp_str)) + printf("Android's image name: %s\n", andr_tmp_str); + + printf("Kernel load addr 0x%08x size %u KiB\n", + kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024)); + + int len = 0; + if (*hdr->cmdline) { + printf("Kernel command line: %s\n", hdr->cmdline); + len += strlen(hdr->cmdline); + } + + char *bootargs = env_get("bootargs"); + if (bootargs) + len += strlen(bootargs); + + char *newbootargs = malloc(len + 2); + if (!newbootargs) { + puts("Error: malloc in android_image_get_kernel failed!\n"); + return -ENOMEM; + } + *newbootargs = '\0'; + + if (bootargs) { + strcpy(newbootargs, bootargs); + strcat(newbootargs, " "); + } + if (*hdr->cmdline) + strcat(newbootargs, hdr->cmdline); + + env_set("bootargs", newbootargs); + + if (os_data) { + if (image_get_magic(ihdr) == IH_MAGIC) { + *os_data = image_get_data(ihdr); + } else { + *os_data = (ulong)hdr; + *os_data += hdr->page_size; + } + } + if (os_len) { + if (image_get_magic(ihdr) == IH_MAGIC) + *os_len = image_get_data_size(ihdr); + else + *os_len = hdr->kernel_size; + } + return 0; +} + +int android_image_check_header(const struct andr_img_hdr *hdr) +{ + return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE); +} + +ulong android_image_get_end(const struct andr_img_hdr *hdr) +{ + ulong end; + + /* + * The header takes a full page, the remaining components are aligned + * on page boundary + */ + end = (ulong)hdr; + end += hdr->page_size; + end += ALIGN(hdr->kernel_size, hdr->page_size); + end += ALIGN(hdr->ramdisk_size, hdr->page_size); + end += ALIGN(hdr->second_size, hdr->page_size); + + if (hdr->header_version >= 1) + end += ALIGN(hdr->recovery_dtbo_size, hdr->page_size); + + if (hdr->header_version >= 2) + end += ALIGN(hdr->dtb_size, hdr->page_size); + + return end; +} + +ulong android_image_get_kload(const struct andr_img_hdr *hdr) +{ + return android_image_get_kernel_addr(hdr); +} + +ulong android_image_get_kcomp(const struct andr_img_hdr *hdr) +{ + const void *p = (void *)((uintptr_t)hdr + hdr->page_size); + + if (image_get_magic((image_header_t *)p) == IH_MAGIC) + return image_get_comp((image_header_t *)p); + else if (get_unaligned_le32(p) == LZ4F_MAGIC) + return IH_COMP_LZ4; + else + return IH_COMP_NONE; +} + +int android_image_get_ramdisk(const struct andr_img_hdr *hdr, + ulong *rd_data, ulong *rd_len) +{ + if (!hdr->ramdisk_size) { + *rd_data = *rd_len = 0; + return -1; + } + + printf("RAM disk load addr 0x%08x size %u KiB\n", + hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024)); + + *rd_data = (unsigned long)hdr; + *rd_data += hdr->page_size; + *rd_data += ALIGN(hdr->kernel_size, hdr->page_size); + + *rd_len = hdr->ramdisk_size; + return 0; +} + +int android_image_get_second(const struct andr_img_hdr *hdr, + ulong *second_data, ulong *second_len) +{ + if (!hdr->second_size) { + *second_data = *second_len = 0; + return -1; + } + + *second_data = (unsigned long)hdr; + *second_data += hdr->page_size; + *second_data += ALIGN(hdr->kernel_size, hdr->page_size); + *second_data += ALIGN(hdr->ramdisk_size, hdr->page_size); + + printf("second address is 0x%lx\n",*second_data); + + *second_len = hdr->second_size; + return 0; +} + +#if !defined(CONFIG_SPL_BUILD) +/** + * android_print_contents - prints out the contents of the Android format image + * @hdr: pointer to the Android format image header + * + * android_print_contents() formats a multi line Android image contents + * description. + * The routine prints out Android image properties + * + * returns: + * no returned results + */ +void android_print_contents(const struct andr_img_hdr *hdr) +{ + const char * const p = IMAGE_INDENT_STRING; + /* os_version = ver << 11 | lvl */ + u32 os_ver = hdr->os_version >> 11; + u32 os_lvl = hdr->os_version & ((1U << 11) - 1); + + printf("%skernel size: %x\n", p, hdr->kernel_size); + printf("%skernel address: %x\n", p, hdr->kernel_addr); + printf("%sramdisk size: %x\n", p, hdr->ramdisk_size); + printf("%sramdisk address: %x\n", p, hdr->ramdisk_addr); + printf("%ssecond size: %x\n", p, hdr->second_size); + printf("%ssecond address: %x\n", p, hdr->second_addr); + printf("%stags address: %x\n", p, hdr->tags_addr); + printf("%spage size: %x\n", p, hdr->page_size); + /* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C) + * lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */ + printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n", + p, hdr->os_version, + (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F, + (os_lvl >> 4) + 2000, os_lvl & 0x0F); + printf("%sname: %s\n", p, hdr->name); + printf("%scmdline: %s\n", p, hdr->cmdline); + printf("%sheader_version: %d\n", p, hdr->header_version); + + if (hdr->header_version >= 1) { + printf("%srecovery dtbo size: %x\n", p, + hdr->recovery_dtbo_size); + printf("%srecovery dtbo offset: %llx\n", p, + hdr->recovery_dtbo_offset); + printf("%sheader size: %x\n", p, + hdr->header_size); + } + + if (hdr->header_version >= 2) { + printf("%sdtb size: %x\n", p, hdr->dtb_size); + printf("%sdtb addr: %llx\n", p, hdr->dtb_addr); + } +} +#endif |