1 /* 2 * Copyright (C) 2015 Nathan Rossi <nathan@nathanrossi.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 * 6 * The following Boot Header format/structures and values are defined in the 7 * following documents: 8 * * Xilinx Zynq-7000 Technical Reference Manual (Section 6.3) 9 * * Xilinx Zynq-7000 Software Developers Guide (Appendix A.7 and A.8) 10 * 11 * Expected Header Size = 0x8C0 12 * Forced as 'little' endian, 32-bit words 13 * 14 * 0x 0 - Interrupt Table (8 words) 15 * ... (Default value = 0xeafffffe) 16 * 0x 1f 17 * 0x 20 - Width Detection 18 * * DEFAULT_WIDTHDETECTION 0xaa995566 19 * 0x 24 - Image Identifier 20 * * DEFAULT_IMAGEIDENTIFIER 0x584c4e58 21 * 0x 28 - Encryption 22 * * 0x00000000 - None 23 * * 0xa5c3c5a3 - eFuse 24 * * 0x3a5c3c5a - bbRam 25 * 0x 2C - User Field 26 * 0x 30 - Image Offset 27 * 0x 34 - Image Size 28 * 0x 38 - Reserved (0x00000000) (according to spec) 29 * * FSBL defines this field for Image Destination Address. 30 * 0x 3C - Image Load 31 * 0x 40 - Image Stored Size 32 * 0x 44 - Reserved (0x00000000) (according to spec) 33 * * FSBL defines this field for QSPI configuration Data. 34 * 0x 48 - Checksum 35 * 0x 4c - Unused (21 words) 36 * ... 37 * 0x 9c 38 * 0x a0 - Register Initialization, 256 Address and Data word pairs 39 * * List is terminated with an address of 0xffffffff or 40 * ... * at the max number of entries 41 * 0x89c 42 * 0x8a0 - Unused (8 words) 43 * ... 44 * 0x8bf 45 * 0x8c0 - Data/Image starts here or above 46 */ 47 48 #include "imagetool.h" 49 #include "mkimage.h" 50 #include <image.h> 51 52 #define HEADER_INTERRUPT_DEFAULT (cpu_to_le32(0xeafffffe)) 53 #define HEADER_REGINIT_NULL (cpu_to_le32(0xffffffff)) 54 #define HEADER_WIDTHDETECTION (cpu_to_le32(0xaa995566)) 55 #define HEADER_IMAGEIDENTIFIER (cpu_to_le32(0x584c4e58)) 56 57 enum { 58 ENCRYPTION_EFUSE = 0xa5c3c5a3, 59 ENCRYPTION_BBRAM = 0x3a5c3c5a, 60 ENCRYPTION_NONE = 0x0, 61 }; 62 63 struct zynq_reginit { 64 uint32_t address; 65 uint32_t data; 66 }; 67 68 #define HEADER_INTERRUPT_VECTORS 8 69 #define HEADER_REGINITS 256 70 71 struct zynq_header { 72 uint32_t interrupt_vectors[HEADER_INTERRUPT_VECTORS]; /* 0x0 */ 73 uint32_t width_detection; /* 0x20 */ 74 uint32_t image_identifier; /* 0x24 */ 75 uint32_t encryption; /* 0x28 */ 76 uint32_t user_field; /* 0x2c */ 77 uint32_t image_offset; /* 0x30 */ 78 uint32_t image_size; /* 0x34 */ 79 uint32_t __reserved1; /* 0x38 */ 80 uint32_t image_load; /* 0x3c */ 81 uint32_t image_stored_size; /* 0x40 */ 82 uint32_t __reserved2; /* 0x44 */ 83 uint32_t checksum; /* 0x48 */ 84 uint32_t __reserved3[21]; /* 0x4c */ 85 struct zynq_reginit register_init[HEADER_REGINITS]; /* 0xa0 */ 86 uint32_t __reserved4[8]; /* 0x8a0 */ 87 }; 88 89 static struct zynq_header zynqimage_header; 90 91 static uint32_t zynqimage_checksum(struct zynq_header *ptr) 92 { 93 uint32_t checksum = 0; 94 95 if (ptr == NULL) 96 return 0; 97 98 checksum += le32_to_cpu(ptr->width_detection); 99 checksum += le32_to_cpu(ptr->image_identifier); 100 checksum += le32_to_cpu(ptr->encryption); 101 checksum += le32_to_cpu(ptr->user_field); 102 checksum += le32_to_cpu(ptr->image_offset); 103 checksum += le32_to_cpu(ptr->image_size); 104 checksum += le32_to_cpu(ptr->__reserved1); 105 checksum += le32_to_cpu(ptr->image_load); 106 checksum += le32_to_cpu(ptr->image_stored_size); 107 checksum += le32_to_cpu(ptr->__reserved2); 108 checksum = ~checksum; 109 110 return cpu_to_le32(checksum); 111 } 112 113 static void zynqimage_default_header(struct zynq_header *ptr) 114 { 115 int i; 116 117 if (ptr == NULL) 118 return; 119 120 ptr->width_detection = HEADER_WIDTHDETECTION; 121 ptr->image_identifier = HEADER_IMAGEIDENTIFIER; 122 ptr->encryption = cpu_to_le32(ENCRYPTION_NONE); 123 124 /* Setup not-supported/constant/reserved fields */ 125 for (i = 0; i < HEADER_INTERRUPT_VECTORS; i++) 126 ptr->interrupt_vectors[i] = HEADER_INTERRUPT_DEFAULT; 127 128 for (i = 0; i < HEADER_REGINITS; i++) { 129 ptr->register_init[i].address = HEADER_REGINIT_NULL; 130 ptr->register_init[i].data = HEADER_REGINIT_NULL; 131 } 132 133 /* 134 * Certain reserved fields are required to be set to 0, ensure they are 135 * set as such. 136 */ 137 ptr->__reserved1 = 0x0; 138 ptr->__reserved2 = 0x0; 139 } 140 141 /* mkimage glue functions */ 142 static int zynqimage_verify_header(unsigned char *ptr, int image_size, 143 struct image_tool_params *params) 144 { 145 struct zynq_header *zynqhdr = (struct zynq_header *)ptr; 146 147 if (image_size < sizeof(struct zynq_header)) 148 return -1; 149 150 if (zynqhdr->__reserved1 != 0) 151 return -1; 152 153 if (zynqhdr->__reserved2 != 0) 154 return -1; 155 156 if (zynqhdr->width_detection != HEADER_WIDTHDETECTION) 157 return -1; 158 if (zynqhdr->image_identifier != HEADER_IMAGEIDENTIFIER) 159 return -1; 160 161 if (zynqimage_checksum(zynqhdr) != zynqhdr->checksum) 162 return -1; 163 164 return 0; 165 } 166 167 static void zynqimage_print_header(const void *ptr) 168 { 169 struct zynq_header *zynqhdr = (struct zynq_header *)ptr; 170 int i; 171 172 printf("Image Type : Xilinx Zynq Boot Image support\n"); 173 printf("Image Offset : 0x%08x\n", le32_to_cpu(zynqhdr->image_offset)); 174 printf("Image Size : %lu bytes (%lu bytes packed)\n", 175 (unsigned long)le32_to_cpu(zynqhdr->image_size), 176 (unsigned long)le32_to_cpu(zynqhdr->image_stored_size)); 177 printf("Image Load : 0x%08x\n", le32_to_cpu(zynqhdr->image_load)); 178 printf("User Field : 0x%08x\n", le32_to_cpu(zynqhdr->user_field)); 179 printf("Checksum : 0x%08x\n", le32_to_cpu(zynqhdr->checksum)); 180 181 for (i = 0; i < HEADER_INTERRUPT_VECTORS; i++) { 182 if (zynqhdr->interrupt_vectors[i] == HEADER_INTERRUPT_DEFAULT) 183 continue; 184 185 printf("Modified Interrupt Vector Address [%d]: 0x%08x\n", i, 186 le32_to_cpu(zynqhdr->interrupt_vectors[i])); 187 } 188 189 for (i = 0; i < HEADER_REGINITS; i++) { 190 if (zynqhdr->register_init[i].address == HEADER_REGINIT_NULL) 191 break; 192 193 if (i == 0) 194 printf("Custom Register Initialization:\n"); 195 196 printf(" @ 0x%08x -> 0x%08x\n", 197 le32_to_cpu(zynqhdr->register_init[i].address), 198 le32_to_cpu(zynqhdr->register_init[i].data)); 199 } 200 } 201 202 static int zynqimage_check_params(struct image_tool_params *params) 203 { 204 if (!params) 205 return 0; 206 207 if (params->addr != 0x0) { 208 fprintf(stderr, "Error: Load Address cannot be specified.\n"); 209 return -1; 210 } 211 212 /* 213 * If the entry point is specified ensure it is 64 byte aligned. 214 */ 215 if (params->eflag && (params->ep % 64 != 0)) { 216 fprintf(stderr, 217 "Error: Entry Point must be aligned to a 64-byte boundary.\n"); 218 return -1; 219 } 220 221 return !(params->lflag || params->dflag); 222 } 223 224 static int zynqimage_check_image_types(uint8_t type) 225 { 226 if (type == IH_TYPE_ZYNQIMAGE) 227 return EXIT_SUCCESS; 228 return EXIT_FAILURE; 229 } 230 231 static void zynqimage_parse_initparams(struct zynq_header *zynqhdr, 232 const char *filename) 233 { 234 FILE *fp; 235 struct zynq_reginit reginit; 236 unsigned int reg_count = 0; 237 int r, err; 238 struct stat path_stat; 239 240 /* Expect a table of register-value pairs, e.g. "0x12345678 0x4321" */ 241 fp = fopen(filename, "r"); 242 if (!fp) { 243 fprintf(stderr, "Cannot open initparams file: %s\n", filename); 244 exit(1); 245 } 246 247 err = fstat(fileno(fp), &path_stat); 248 if (err) { 249 fclose(fp); 250 return; 251 } 252 253 if (!S_ISREG(path_stat.st_mode)) { 254 fclose(fp); 255 return; 256 } 257 258 do { 259 r = fscanf(fp, "%x %x", ®init.address, ®init.data); 260 if (r == 2) { 261 zynqhdr->register_init[reg_count] = reginit; 262 ++reg_count; 263 } 264 r = fscanf(fp, "%*[^\n]\n"); /* Skip to next line */ 265 } while ((r != EOF) && (reg_count < HEADER_REGINITS)); 266 fclose(fp); 267 } 268 269 static void zynqimage_set_header(void *ptr, struct stat *sbuf, int ifd, 270 struct image_tool_params *params) 271 { 272 struct zynq_header *zynqhdr = (struct zynq_header *)ptr; 273 zynqimage_default_header(zynqhdr); 274 275 /* place image directly after header */ 276 zynqhdr->image_offset = 277 cpu_to_le32((uint32_t)sizeof(struct zynq_header)); 278 zynqhdr->image_size = cpu_to_le32((uint32_t)sbuf->st_size); 279 zynqhdr->image_stored_size = zynqhdr->image_size; 280 zynqhdr->image_load = 0x0; 281 if (params->eflag) 282 zynqhdr->image_load = cpu_to_le32((uint32_t)params->ep); 283 284 /* User can pass in text file with init list */ 285 if (strlen(params->imagename2)) 286 zynqimage_parse_initparams(zynqhdr, params->imagename2); 287 288 zynqhdr->checksum = zynqimage_checksum(zynqhdr); 289 } 290 291 U_BOOT_IMAGE_TYPE( 292 zynqimage, 293 "Xilinx Zynq Boot Image support", 294 sizeof(struct zynq_header), 295 (void *)&zynqimage_header, 296 zynqimage_check_params, 297 zynqimage_verify_header, 298 zynqimage_print_header, 299 zynqimage_set_header, 300 NULL, 301 zynqimage_check_image_types, 302 NULL, 303 NULL 304 ); 305