1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
8 #include <android_image.h>
12 #define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
14 static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
16 static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
19 * All the Android tools that generate a boot.img use this
20 * address as the default.
22 * Even though it doesn't really make a lot of sense, and it
23 * might be valid on some platforms, we treat that adress as
24 * the default value for this field, and try to execute the
25 * kernel in place in such a case.
27 * Otherwise, we will return the actual value set by the user.
29 if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
30 return (ulong)hdr + hdr->page_size;
32 return hdr->kernel_addr;
36 * android_image_get_kernel() - processes kernel part of Android boot images
37 * @hdr: Pointer to image header, which is at the start
39 * @verify: Checksum verification flag. Currently unimplemented.
40 * @os_data: Pointer to a ulong variable, will hold os data start
42 * @os_len: Pointer to a ulong variable, will hold os data length.
44 * This function returns the os image's start address and length. Also,
45 * it appends the kernel command line to the bootargs env variable.
47 * Return: Zero, os start address and length on success,
48 * otherwise on failure.
50 int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
51 ulong *os_data, ulong *os_len)
53 u32 kernel_addr = android_image_get_kernel_addr(hdr);
56 * Not all Android tools use the id field for signing the image with
57 * sha1 (or anything) so we don't check it. It is not obvious that the
58 * string is null terminated so we take care of this.
60 strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
61 andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
62 if (strlen(andr_tmp_str))
63 printf("Android's image name: %s\n", andr_tmp_str);
65 printf("Kernel load addr 0x%08x size %u KiB\n",
66 kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));
70 printf("Kernel command line: %s\n", hdr->cmdline);
71 len += strlen(hdr->cmdline);
74 char *bootargs = env_get("bootargs");
76 len += strlen(bootargs);
78 char *newbootargs = malloc(len + 2);
80 puts("Error: malloc in android_image_get_kernel failed!\n");
86 strcpy(newbootargs, bootargs);
87 strcat(newbootargs, " ");
90 strcat(newbootargs, hdr->cmdline);
92 env_set("bootargs", newbootargs);
95 *os_data = (ulong)hdr;
96 *os_data += hdr->page_size;
99 *os_len = hdr->kernel_size;
103 int android_image_check_header(const struct andr_img_hdr *hdr)
105 return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
108 ulong android_image_get_end(const struct andr_img_hdr *hdr)
112 * The header takes a full page, the remaining components are aligned
116 end += hdr->page_size;
117 end += ALIGN(hdr->kernel_size, hdr->page_size);
118 end += ALIGN(hdr->ramdisk_size, hdr->page_size);
119 end += ALIGN(hdr->second_size, hdr->page_size);
124 ulong android_image_get_kload(const struct andr_img_hdr *hdr)
126 return android_image_get_kernel_addr(hdr);
129 int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
130 ulong *rd_data, ulong *rd_len)
132 if (!hdr->ramdisk_size) {
133 *rd_data = *rd_len = 0;
137 printf("RAM disk load addr 0x%08x size %u KiB\n",
138 hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));
140 *rd_data = (unsigned long)hdr;
141 *rd_data += hdr->page_size;
142 *rd_data += ALIGN(hdr->kernel_size, hdr->page_size);
144 *rd_len = hdr->ramdisk_size;
148 int android_image_get_second(const struct andr_img_hdr *hdr,
149 ulong *second_data, ulong *second_len)
151 if (!hdr->second_size) {
152 *second_data = *second_len = 0;
156 *second_data = (unsigned long)hdr;
157 *second_data += hdr->page_size;
158 *second_data += ALIGN(hdr->kernel_size, hdr->page_size);
159 *second_data += ALIGN(hdr->ramdisk_size, hdr->page_size);
161 printf("second address is 0x%lx\n",*second_data);
163 *second_len = hdr->second_size;
167 #if !defined(CONFIG_SPL_BUILD)
169 * android_print_contents - prints out the contents of the Android format image
170 * @hdr: pointer to the Android format image header
172 * android_print_contents() formats a multi line Android image contents
174 * The routine prints out Android image properties
177 * no returned results
179 void android_print_contents(const struct andr_img_hdr *hdr)
181 const char * const p = IMAGE_INDENT_STRING;
182 /* os_version = ver << 11 | lvl */
183 u32 os_ver = hdr->os_version >> 11;
184 u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
186 printf("%skernel size: %x\n", p, hdr->kernel_size);
187 printf("%skernel address: %x\n", p, hdr->kernel_addr);
188 printf("%sramdisk size: %x\n", p, hdr->ramdisk_size);
189 printf("%sramdisk addrress: %x\n", p, hdr->ramdisk_addr);
190 printf("%ssecond size: %x\n", p, hdr->second_size);
191 printf("%ssecond address: %x\n", p, hdr->second_addr);
192 printf("%stags address: %x\n", p, hdr->tags_addr);
193 printf("%spage size: %x\n", p, hdr->page_size);
194 /* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C)
195 * lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */
196 printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n",
198 (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
199 (os_lvl >> 4) + 2000, os_lvl & 0x0F);
200 printf("%sname: %s\n", p, hdr->name);
201 printf("%scmdline: %s\n", p, hdr->cmdline);