Patrick Georgi | b7b56dd8 | 2009-09-14 13:29:27 +0000 | [diff] [blame] | 1 | /* |
| 2 | * common utility functions for cbfstool |
| 3 | * |
| 4 | * Copyright (C) 2009 coresystems GmbH |
| 5 | * written by Patrick Georgi <patrick.georgi@coresystems.de> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; version 2 of the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include "common.h" |
| 25 | #include "cbfs.h" |
| 26 | #include "elf.h" |
| 27 | |
| 28 | #define dprintf |
| 29 | |
| 30 | void *loadfile(const char *filename, uint32_t * romsize_p, void *content, |
| 31 | int place) |
| 32 | { |
| 33 | FILE *file = fopen(filename, "rb"); |
Patrick Georgi | 45d8a83 | 2009-09-15 08:21:46 +0000 | [diff] [blame^] | 34 | if (file == NULL) |
| 35 | return NULL; |
Patrick Georgi | b7b56dd8 | 2009-09-14 13:29:27 +0000 | [diff] [blame] | 36 | fseek(file, 0, SEEK_END); |
| 37 | *romsize_p = ftell(file); |
| 38 | fseek(file, 0, SEEK_SET); |
| 39 | if (!content) |
| 40 | content = malloc(*romsize_p); |
| 41 | else if (place == SEEK_END) |
| 42 | content -= *romsize_p; |
| 43 | if (!fread(content, *romsize_p, 1, file)) { |
| 44 | printf("failed to read %s\n", filename); |
| 45 | return NULL; |
| 46 | } |
| 47 | fclose(file); |
| 48 | return content; |
| 49 | } |
| 50 | |
| 51 | struct cbfs_header *master_header; |
| 52 | uint32_t phys_start, phys_end, align, romsize; |
| 53 | void *offset; |
| 54 | |
| 55 | void recalculate_rom_geometry(void *romarea) |
| 56 | { |
| 57 | offset = romarea + romsize - 0x100000000ULL; |
| 58 | master_header = (struct cbfs_header *) |
| 59 | phys_to_virt(*((uint32_t *) phys_to_virt(0xfffffffc))); |
| 60 | phys_start = (0 - romsize + ntohl(master_header->offset)) & 0xffffffff; |
| 61 | phys_end = |
| 62 | (0 - ntohl(master_header->bootblocksize) - |
| 63 | sizeof(struct cbfs_header)) & 0xffffffff; |
| 64 | align = ntohl(master_header->align); |
| 65 | } |
| 66 | |
| 67 | void *loadrom(const char *filename) |
| 68 | { |
| 69 | void *romarea = loadfile(filename, &romsize, 0, SEEK_SET); |
Patrick Georgi | 45d8a83 | 2009-09-15 08:21:46 +0000 | [diff] [blame^] | 70 | if (romarea == NULL) |
| 71 | return NULL; |
Patrick Georgi | b7b56dd8 | 2009-09-14 13:29:27 +0000 | [diff] [blame] | 72 | recalculate_rom_geometry(romarea); |
| 73 | return romarea; |
| 74 | } |
| 75 | |
| 76 | void writerom(const char *filename, void *start, uint32_t size) |
| 77 | { |
| 78 | FILE *file = fopen(filename, "wb"); |
| 79 | fwrite(start, size, 1, file); |
| 80 | fclose(file); |
| 81 | } |
| 82 | |
| 83 | int cbfs_file_header(uint32_t physaddr) |
| 84 | { |
| 85 | /* maybe improve this test */ |
| 86 | return (strncmp(phys_to_virt(physaddr), "LARCHIVE", 8) == 0); |
| 87 | } |
| 88 | |
| 89 | struct cbfs_file *cbfs_create_empty_file(uint32_t physaddr, uint32_t size) |
| 90 | { |
| 91 | struct cbfs_file *nextfile = (struct cbfs_file *)phys_to_virt(physaddr); |
| 92 | strncpy(nextfile->magic, "LARCHIVE", 8); |
| 93 | nextfile->len = htonl(size); |
| 94 | nextfile->type = htonl(0xffffffff); |
| 95 | nextfile->checksum = 0; // FIXME? |
| 96 | nextfile->offset = htonl(sizeof(struct cbfs_file) + 16); |
| 97 | memset(((void *)nextfile) + sizeof(struct cbfs_file), 0, 16); |
| 98 | return nextfile; |
| 99 | } |
| 100 | |
| 101 | int iself(unsigned char *input) |
| 102 | { |
| 103 | Elf32_Ehdr *ehdr = (Elf32_Ehdr *) input; |
| 104 | return !memcmp(ehdr->e_ident, ELFMAG, 4); |
| 105 | } |
| 106 | |
| 107 | struct filetypes_t { |
| 108 | uint32_t type; |
| 109 | const char *name; |
| 110 | } filetypes[] = { |
| 111 | {CBFS_COMPONENT_STAGE, "stage"}, |
| 112 | {CBFS_COMPONENT_PAYLOAD, "payload"}, |
| 113 | {CBFS_COMPONENT_OPTIONROM, "optionrom"}, |
| 114 | {CBFS_COMPONENT_DELETED, "deleted"}, |
| 115 | {CBFS_COMPONENT_NULL, "null"} |
| 116 | }; |
| 117 | |
| 118 | const char *strfiletype(uint32_t number) |
| 119 | { |
| 120 | int i; |
| 121 | for (i = 0; i < (sizeof(filetypes) / sizeof(struct filetypes_t)); i++) |
| 122 | if (filetypes[i].type == number) |
| 123 | return filetypes[i].name; |
| 124 | return "unknown"; |
| 125 | } |
| 126 | |
| 127 | uint64_t intfiletype(const char *name) |
| 128 | { |
| 129 | int i; |
| 130 | for (i = 0; i < (sizeof(filetypes) / sizeof(struct filetypes_t)); i++) |
| 131 | if (strcmp(filetypes[i].name, name) == 0) |
| 132 | return filetypes[i].type; |
| 133 | return -1; |
| 134 | } |
| 135 | |
| 136 | void print_cbfs_directory(const char *filename) |
| 137 | { |
| 138 | printf |
| 139 | ("%s: %d kB, bootblocksize %d, romsize %d, offset 0x%x\nAlignment: %d bytes\n\n", |
| 140 | filename, romsize / 1024, ntohl(master_header->bootblocksize), |
| 141 | romsize, ntohl(master_header->offset), align); |
| 142 | printf("%-30s %-10s %-12s Size\n", "Name", "Offset", "Type"); |
| 143 | uint32_t current = phys_start; |
| 144 | while (current < phys_end) { |
| 145 | if (!cbfs_file_header(current)) { |
| 146 | current += align; |
| 147 | continue; |
| 148 | } |
| 149 | struct cbfs_file *thisfile = |
| 150 | (struct cbfs_file *)phys_to_virt(current); |
| 151 | uint32_t length = ntohl(thisfile->len); |
| 152 | printf("%-30s 0x%-8x %-12s %d\n", |
| 153 | (const char *)(phys_to_virt(current) + |
| 154 | sizeof(struct cbfs_file)), |
| 155 | current - phys_start, strfiletype(ntohl(thisfile->type)), |
| 156 | length); |
| 157 | current = |
| 158 | ALIGN(current + ntohl(thisfile->len) + |
| 159 | ntohl(thisfile->offset), align); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | int add_file_to_cbfs(void *content, uint32_t contentsize, uint32_t location) |
| 164 | { |
| 165 | uint32_t current = phys_start; |
| 166 | while (current < phys_end) { |
| 167 | if (!cbfs_file_header(current)) { |
| 168 | current += align; |
| 169 | continue; |
| 170 | } |
| 171 | struct cbfs_file *thisfile = |
| 172 | (struct cbfs_file *)phys_to_virt(current); |
| 173 | uint32_t length = ntohl(thisfile->len); |
| 174 | |
| 175 | dprintf("at %x, %x bytes\n", current, length); |
| 176 | /* Is this a free chunk? */ |
| 177 | if ((thisfile->type == CBFS_COMPONENT_DELETED) |
| 178 | || (thisfile->type == CBFS_COMPONENT_NULL)) { |
| 179 | dprintf("null||deleted at %x, %x bytes\n", current, |
| 180 | length); |
| 181 | /* if this is the right size, and if specified, the right location, use it */ |
| 182 | if ((contentsize <= length) |
| 183 | && ((location == 0) || (current == location))) { |
| 184 | if (contentsize < length) { |
| 185 | dprintf |
| 186 | ("this chunk is %x bytes, we need %x. create a new chunk at %x with %x bytes\n", |
| 187 | length, contentsize, |
| 188 | ALIGN(current + contentsize, |
| 189 | align), |
| 190 | length - contentsize); |
| 191 | uint32_t start = |
| 192 | ALIGN(current + contentsize, align); |
| 193 | uint32_t size = |
| 194 | current + ntohl(thisfile->offset) |
| 195 | + length - start - 16 - |
| 196 | sizeof(struct cbfs_file); |
| 197 | cbfs_create_empty_file(start, size); |
| 198 | } |
| 199 | dprintf("copying data\n"); |
| 200 | memcpy(phys_to_virt(current), content, |
| 201 | contentsize); |
| 202 | break; |
| 203 | } |
| 204 | if (location == 0) |
| 205 | continue; |
| 206 | |
| 207 | /* CBFS has the constraint that the chain always moves up in memory. so once |
| 208 | we're past the place we seek, we don't need to look any further */ |
| 209 | if (current > location) { |
| 210 | printf |
| 211 | ("the requested space is not available\n"); |
| 212 | return 1; |
| 213 | } |
| 214 | |
| 215 | /* Is the requested location inside the current chunk? */ |
| 216 | if ((current < location) |
| 217 | && ((location + contentsize) <= (current + length))) { |
| 218 | /* Split it up. In the next iteration the code will be at the right place. */ |
| 219 | dprintf("split up. new length: %x\n", |
| 220 | location - current - |
| 221 | ntohl(thisfile->offset)); |
| 222 | thisfile->len = |
| 223 | htonl(location - current - |
| 224 | ntohl(thisfile->offset)); |
| 225 | struct cbfs_file *nextfile = |
| 226 | cbfs_create_empty_file(location, |
| 227 | length - (location - |
| 228 | current)); |
| 229 | } |
| 230 | } |
| 231 | current = |
| 232 | ALIGN(current + ntohl(thisfile->len) + |
| 233 | ntohl(thisfile->offset), align); |
| 234 | } |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | /* returns new data block with cbfs_file header, suitable to dump into the ROM. location returns |
| 239 | the new location that points to the cbfs_file header */ |
| 240 | void *create_cbfs_file(const char *filename, void *data, uint32_t * datasize, |
| 241 | uint32_t type, uint32_t * location) |
| 242 | { |
| 243 | uint32_t filename_len = ALIGN(strlen(filename) + 1, 16); |
| 244 | uint32_t headersize = sizeof(struct cbfs_file) + filename_len; |
| 245 | if ((location != 0) && (*location != 0)) { |
| 246 | uint32_t offset = *location % align; |
| 247 | /* If offset >= (headersize % align), we can stuff the header into the offset. |
| 248 | Otherwise the header has to be aligned itself, and put before the offset data */ |
| 249 | if (offset >= (headersize % align)) { |
| 250 | offset -= (headersize % align); |
| 251 | } else { |
| 252 | offset += align - (headersize % align); |
| 253 | } |
| 254 | headersize += offset; |
| 255 | *location -= headersize; |
| 256 | } |
| 257 | void *newdata = malloc(*datasize + headersize); |
| 258 | struct cbfs_file *nextfile = (struct cbfs_file *)newdata; |
| 259 | strncpy(nextfile->magic, "LARCHIVE", 8); |
| 260 | nextfile->len = htonl(*datasize); |
| 261 | nextfile->type = htonl(type); |
| 262 | nextfile->checksum = 0; // FIXME? |
| 263 | nextfile->offset = htonl(headersize); |
| 264 | strcpy(newdata + sizeof(struct cbfs_file), filename); |
| 265 | memcpy(newdata + headersize, data, *datasize); |
| 266 | *datasize += headersize; |
| 267 | return newdata; |
| 268 | } |
| 269 | |
| 270 | int create_cbfs_image(const char *romfile, uint32_t _romsize, |
| 271 | const char *bootblock, uint32_t align) |
| 272 | { |
| 273 | romsize = _romsize; |
| 274 | unsigned char *romarea = malloc(romsize); |
| 275 | memset(romarea, 0xff, romsize); |
| 276 | recalculate_rom_geometry(romarea); |
| 277 | |
| 278 | if (align == 0) |
| 279 | align = 64; |
| 280 | |
| 281 | uint32_t bootblocksize = 0; |
| 282 | loadfile(bootblock, &bootblocksize, romarea + romsize, SEEK_END); |
| 283 | struct cbfs_header *master_header = |
| 284 | (struct cbfs_header *)(romarea + romsize - bootblocksize - |
| 285 | sizeof(struct cbfs_header)); |
| 286 | master_header->magic = ntohl(0x4f524243); |
| 287 | master_header->version = ntohl(0x31313131); |
| 288 | master_header->romsize = htonl(romsize); |
| 289 | master_header->bootblocksize = htonl(bootblocksize); |
| 290 | master_header->align = htonl(align); |
| 291 | master_header->offset = htonl(0); |
| 292 | ((uint32_t *) phys_to_virt(0xfffffffc))[0] = |
| 293 | virt_to_phys(master_header); |
| 294 | struct cbfs_file *one_empty_file = |
| 295 | cbfs_create_empty_file((0 - romsize) & 0xffffffff, |
| 296 | romsize - bootblocksize - |
| 297 | sizeof(struct cbfs_header) - |
| 298 | sizeof(struct cbfs_file) - 16); |
| 299 | |
| 300 | writerom(romfile, romarea, romsize); |
| 301 | return 0; |
| 302 | } |