2 * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <android_image.h>
13 #define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
15 static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
17 static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
20 * All the Android tools that generate a boot.img use this
21 * address as the default.
23 * Even though it doesn't really make a lot of sense, and it
24 * might be valid on some platforms, we treat that adress as
25 * the default value for this field, and try to execute the
26 * kernel in place in such a case.
28 * Otherwise, we will return the actual value set by the user.
30 if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
31 return (ulong)hdr + hdr->page_size;
33 return hdr->kernel_addr;
37 * android_image_get_kernel() - processes kernel part of Android boot images
38 * @hdr: Pointer to image header, which is at the start
40 * @verify: Checksum verification flag. Currently unimplemented.
41 * @os_data: Pointer to a ulong variable, will hold os data start
43 * @os_len: Pointer to a ulong variable, will hold os data length.
45 * This function returns the os image's start address and length. Also,
46 * it appends the kernel command line to the bootargs env variable.
48 * Return: Zero, os start address and length on success,
49 * otherwise on failure.
51 int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
52 ulong *os_data, ulong *os_len)
54 u32 kernel_addr = android_image_get_kernel_addr(hdr);
57 * Not all Android tools use the id field for signing the image with
58 * sha1 (or anything) so we don't check it. It is not obvious that the
59 * string is null terminated so we take care of this.
61 strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
62 andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
63 if (strlen(andr_tmp_str))
64 printf("Android's image name: %s\n", andr_tmp_str);
66 printf("Kernel load addr 0x%08x size %u KiB\n",
67 kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));
71 printf("Kernel command line: %s\n", hdr->cmdline);
72 len += strlen(hdr->cmdline);
75 char *bootargs = env_get("bootargs");
77 len += strlen(bootargs);
79 char *newbootargs = malloc(len + 2);
81 puts("Error: malloc in android_image_get_kernel failed!\n");
87 strcpy(newbootargs, bootargs);
88 strcat(newbootargs, " ");
91 strcat(newbootargs, hdr->cmdline);
93 env_set("bootargs", newbootargs);
96 *os_data = (ulong)hdr;
97 *os_data += hdr->page_size;
100 *os_len = hdr->kernel_size;
104 int android_image_check_header(const struct andr_img_hdr *hdr)
106 return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
109 ulong android_image_get_end(const struct andr_img_hdr *hdr)
113 * The header takes a full page, the remaining components are aligned
117 end += hdr->page_size;
118 end += ALIGN(hdr->kernel_size, hdr->page_size);
119 end += ALIGN(hdr->ramdisk_size, hdr->page_size);
120 end += ALIGN(hdr->second_size, hdr->page_size);
125 ulong android_image_get_kload(const struct andr_img_hdr *hdr)
127 return android_image_get_kernel_addr(hdr);
130 int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
131 ulong *rd_data, ulong *rd_len)
133 if (!hdr->ramdisk_size) {
134 *rd_data = *rd_len = 0;
138 printf("RAM disk load addr 0x%08x size %u KiB\n",
139 hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));
141 *rd_data = (unsigned long)hdr;
142 *rd_data += hdr->page_size;
143 *rd_data += ALIGN(hdr->kernel_size, hdr->page_size);
145 *rd_len = hdr->ramdisk_size;
149 int android_image_get_second(const struct andr_img_hdr *hdr,
150 ulong *second_data, ulong *second_len)
152 if (!hdr->second_size) {
153 *second_data = *second_len = 0;
157 *second_data = (unsigned long)hdr;
158 *second_data += hdr->page_size;
159 *second_data += ALIGN(hdr->kernel_size, hdr->page_size);
160 *second_data += ALIGN(hdr->ramdisk_size, hdr->page_size);
162 printf("second address is 0x%lx\n",*second_data);
164 *second_len = hdr->second_size;
168 #if !defined(CONFIG_SPL_BUILD)
170 * android_print_contents - prints out the contents of the Android format image
171 * @hdr: pointer to the Android format image header
173 * android_print_contents() formats a multi line Android image contents
175 * The routine prints out Android image properties
178 * no returned results
180 void android_print_contents(const struct andr_img_hdr *hdr)
182 const char * const p = IMAGE_INDENT_STRING;
183 /* os_version = ver << 11 | lvl */
184 u32 os_ver = hdr->os_version >> 11;
185 u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
187 printf("%skernel size: %x\n", p, hdr->kernel_size);
188 printf("%skernel address: %x\n", p, hdr->kernel_addr);
189 printf("%sramdisk size: %x\n", p, hdr->ramdisk_size);
190 printf("%sramdisk addrress: %x\n", p, hdr->ramdisk_addr);
191 printf("%ssecond size: %x\n", p, hdr->second_size);
192 printf("%ssecond address: %x\n", p, hdr->second_addr);
193 printf("%stags address: %x\n", p, hdr->tags_addr);
194 printf("%spage size: %x\n", p, hdr->page_size);
195 /* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C)
196 * lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */
197 printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n",
199 (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
200 (os_lvl >> 4) + 2000, os_lvl & 0x0F);
201 printf("%sname: %s\n", p, hdr->name);
202 printf("%scmdline: %s\n", p, hdr->cmdline);