1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 #include <android_image.h>
12 #include <asm/unaligned.h>
14 #define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
16 static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
18 static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
21 * All the Android tools that generate a boot.img use this
22 * address as the default.
24 * Even though it doesn't really make a lot of sense, and it
25 * might be valid on some platforms, we treat that adress as
26 * the default value for this field, and try to execute the
27 * kernel in place in such a case.
29 * Otherwise, we will return the actual value set by the user.
31 if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
32 return (ulong)hdr + hdr->page_size;
34 return hdr->kernel_addr;
38 * android_image_get_kernel() - processes kernel part of Android boot images
39 * @hdr: Pointer to image header, which is at the start
41 * @verify: Checksum verification flag. Currently unimplemented.
42 * @os_data: Pointer to a ulong variable, will hold os data start
44 * @os_len: Pointer to a ulong variable, will hold os data length.
46 * This function returns the os image's start address and length. Also,
47 * it appends the kernel command line to the bootargs env variable.
49 * Return: Zero, os start address and length on success,
50 * otherwise on failure.
52 int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
53 ulong *os_data, ulong *os_len)
55 u32 kernel_addr = android_image_get_kernel_addr(hdr);
56 const struct image_header *ihdr = (const struct image_header *)
57 ((uintptr_t)hdr + hdr->page_size);
60 * Not all Android tools use the id field for signing the image with
61 * sha1 (or anything) so we don't check it. It is not obvious that the
62 * string is null terminated so we take care of this.
64 strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
65 andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
66 if (strlen(andr_tmp_str))
67 printf("Android's image name: %s\n", andr_tmp_str);
69 printf("Kernel load addr 0x%08x size %u KiB\n",
70 kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));
74 printf("Kernel command line: %s\n", hdr->cmdline);
75 len += strlen(hdr->cmdline);
78 char *bootargs = env_get("bootargs");
80 len += strlen(bootargs);
82 char *newbootargs = malloc(len + 2);
84 puts("Error: malloc in android_image_get_kernel failed!\n");
90 strcpy(newbootargs, bootargs);
91 strcat(newbootargs, " ");
94 strcat(newbootargs, hdr->cmdline);
96 env_set("bootargs", newbootargs);
99 if (image_get_magic(ihdr) == IH_MAGIC) {
100 *os_data = image_get_data(ihdr);
102 *os_data = (ulong)hdr;
103 *os_data += hdr->page_size;
107 if (image_get_magic(ihdr) == IH_MAGIC)
108 *os_len = image_get_data_size(ihdr);
110 *os_len = hdr->kernel_size;
115 int android_image_check_header(const struct andr_img_hdr *hdr)
117 return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
120 ulong android_image_get_end(const struct andr_img_hdr *hdr)
124 * The header takes a full page, the remaining components are aligned
128 end += hdr->page_size;
129 end += ALIGN(hdr->kernel_size, hdr->page_size);
130 end += ALIGN(hdr->ramdisk_size, hdr->page_size);
131 end += ALIGN(hdr->second_size, hdr->page_size);
136 ulong android_image_get_kload(const struct andr_img_hdr *hdr)
138 return android_image_get_kernel_addr(hdr);
141 ulong android_image_get_kcomp(const struct andr_img_hdr *hdr)
143 const void *p = (void *)((uintptr_t)hdr + hdr->page_size);
145 if (image_get_magic((image_header_t *)p) == IH_MAGIC)
146 return image_get_comp((image_header_t *)p);
147 else if (get_unaligned_le32(p) == LZ4F_MAGIC)
153 int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
154 ulong *rd_data, ulong *rd_len)
156 if (!hdr->ramdisk_size) {
157 *rd_data = *rd_len = 0;
161 printf("RAM disk load addr 0x%08x size %u KiB\n",
162 hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));
164 *rd_data = (unsigned long)hdr;
165 *rd_data += hdr->page_size;
166 *rd_data += ALIGN(hdr->kernel_size, hdr->page_size);
168 *rd_len = hdr->ramdisk_size;
172 int android_image_get_second(const struct andr_img_hdr *hdr,
173 ulong *second_data, ulong *second_len)
175 if (!hdr->second_size) {
176 *second_data = *second_len = 0;
180 *second_data = (unsigned long)hdr;
181 *second_data += hdr->page_size;
182 *second_data += ALIGN(hdr->kernel_size, hdr->page_size);
183 *second_data += ALIGN(hdr->ramdisk_size, hdr->page_size);
185 printf("second address is 0x%lx\n",*second_data);
187 *second_len = hdr->second_size;
191 #if !defined(CONFIG_SPL_BUILD)
193 * android_print_contents - prints out the contents of the Android format image
194 * @hdr: pointer to the Android format image header
196 * android_print_contents() formats a multi line Android image contents
198 * The routine prints out Android image properties
201 * no returned results
203 void android_print_contents(const struct andr_img_hdr *hdr)
205 const char * const p = IMAGE_INDENT_STRING;
206 /* os_version = ver << 11 | lvl */
207 u32 os_ver = hdr->os_version >> 11;
208 u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
210 printf("%skernel size: %x\n", p, hdr->kernel_size);
211 printf("%skernel address: %x\n", p, hdr->kernel_addr);
212 printf("%sramdisk size: %x\n", p, hdr->ramdisk_size);
213 printf("%sramdisk address: %x\n", p, hdr->ramdisk_addr);
214 printf("%ssecond size: %x\n", p, hdr->second_size);
215 printf("%ssecond address: %x\n", p, hdr->second_addr);
216 printf("%stags address: %x\n", p, hdr->tags_addr);
217 printf("%spage size: %x\n", p, hdr->page_size);
218 /* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C)
219 * lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */
220 printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n",
222 (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
223 (os_lvl >> 4) + 2000, os_lvl & 0x0F);
224 printf("%sname: %s\n", p, hdr->name);
225 printf("%scmdline: %s\n", p, hdr->cmdline);