tools/zynqimage.c

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