1 /* 2 * Copyright (C) 2013, Intel Corporation 3 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> 4 * 5 * SPDX-License-Identifier: Intel 6 */ 7 8 #include <common.h> 9 #include <asm/fsp/fsp_support.h> 10 #include <asm/post.h> 11 12 /** 13 * Compares two GUIDs 14 * 15 * If the GUIDs are identical then true is returned. 16 * If there are any bit differences in the two GUIDs, then false is returned. 17 * 18 * @guid1: A pointer to a 128 bit GUID. 19 * @guid2: A pointer to a 128 bit GUID. 20 * 21 * @retval true: guid1 and guid2 are identical. 22 * @retval false: guid1 and guid2 are not identical. 23 */ 24 static bool compare_guid(const struct efi_guid *guid1, 25 const struct efi_guid *guid2) 26 { 27 if (memcmp(guid1, guid2, sizeof(struct efi_guid)) == 0) 28 return true; 29 else 30 return false; 31 } 32 33 struct fsp_header *__attribute__((optimize("O0"))) find_fsp_header(void) 34 { 35 /* 36 * This function may be called before the a stack is established, 37 * so special care must be taken. First, it cannot declare any local 38 * variable using stack. Only register variable can be used here. 39 * Secondly, some compiler version will add prolog or epilog code 40 * for the C function. If so the function call may not work before 41 * stack is ready. 42 * 43 * GCC 4.8.1 has been verified to be working for the following codes. 44 */ 45 volatile register u8 *fsp asm("eax"); 46 47 /* Initalize the FSP base */ 48 fsp = (u8 *)CONFIG_FSP_ADDR; 49 50 /* Check the FV signature, _FVH */ 51 if (((struct fv_header *)fsp)->sign == EFI_FVH_SIGNATURE) { 52 /* Go to the end of the FV header and align the address */ 53 fsp += ((struct fv_header *)fsp)->ext_hdr_off; 54 fsp += ((struct fv_ext_header *)fsp)->ext_hdr_size; 55 fsp = (u8 *)(((u32)fsp + 7) & 0xFFFFFFF8); 56 } else { 57 fsp = 0; 58 } 59 60 /* Check the FFS GUID */ 61 if (fsp && 62 ((struct ffs_file_header *)fsp)->name.data1 == FSP_GUID_DATA1 && 63 ((struct ffs_file_header *)fsp)->name.data2 == FSP_GUID_DATA2 && 64 ((struct ffs_file_header *)fsp)->name.data3 == FSP_GUID_DATA3 && 65 ((struct ffs_file_header *)fsp)->name.data4[0] == FSP_GUID_DATA4_0 && 66 ((struct ffs_file_header *)fsp)->name.data4[1] == FSP_GUID_DATA4_1 && 67 ((struct ffs_file_header *)fsp)->name.data4[2] == FSP_GUID_DATA4_2 && 68 ((struct ffs_file_header *)fsp)->name.data4[3] == FSP_GUID_DATA4_3 && 69 ((struct ffs_file_header *)fsp)->name.data4[4] == FSP_GUID_DATA4_4 && 70 ((struct ffs_file_header *)fsp)->name.data4[5] == FSP_GUID_DATA4_5 && 71 ((struct ffs_file_header *)fsp)->name.data4[6] == FSP_GUID_DATA4_6 && 72 ((struct ffs_file_header *)fsp)->name.data4[7] == FSP_GUID_DATA4_7) { 73 /* Add the FFS header size to find the raw section header */ 74 fsp += sizeof(struct ffs_file_header); 75 } else { 76 fsp = 0; 77 } 78 79 if (fsp && 80 ((struct raw_section *)fsp)->type == EFI_SECTION_RAW) { 81 /* Add the raw section header size to find the FSP header */ 82 fsp += sizeof(struct raw_section); 83 } else { 84 fsp = 0; 85 } 86 87 return (struct fsp_header *)fsp; 88 } 89 90 void fsp_continue(u32 status, void *hob_list) 91 { 92 post_code(POST_MRC); 93 94 assert(status == 0); 95 96 /* The boot loader main function entry */ 97 fsp_init_done(hob_list); 98 } 99 100 void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf) 101 { 102 struct fsp_config_data config_data; 103 fsp_init_f init; 104 struct fsp_init_params params; 105 struct fspinit_rtbuf rt_buf; 106 struct fsp_header *fsp_hdr; 107 struct fsp_init_params *params_ptr; 108 #ifdef CONFIG_FSP_USE_UPD 109 struct vpd_region *fsp_vpd; 110 struct upd_region *fsp_upd; 111 #endif 112 113 #ifdef CONFIG_DEBUG_UART 114 setup_early_uart(); 115 #endif 116 117 fsp_hdr = find_fsp_header(); 118 if (fsp_hdr == NULL) { 119 /* No valid FSP info header was found */ 120 panic("Invalid FSP header"); 121 } 122 123 config_data.common.fsp_hdr = fsp_hdr; 124 config_data.common.stack_top = stack_top; 125 config_data.common.boot_mode = boot_mode; 126 127 #ifdef CONFIG_FSP_USE_UPD 128 /* Get VPD region start */ 129 fsp_vpd = (struct vpd_region *)(fsp_hdr->img_base + 130 fsp_hdr->cfg_region_off); 131 132 /* Verify the VPD data region is valid */ 133 assert(fsp_vpd->sign == VPD_IMAGE_ID); 134 135 fsp_upd = &config_data.fsp_upd; 136 137 /* Copy default data from Flash */ 138 memcpy(fsp_upd, (void *)(fsp_hdr->img_base + fsp_vpd->upd_offset), 139 sizeof(struct upd_region)); 140 141 /* Verify the UPD data region is valid */ 142 assert(fsp_upd->terminator == UPD_TERMINATOR); 143 #endif 144 145 memset(&rt_buf, 0, sizeof(struct fspinit_rtbuf)); 146 147 /* Override any configuration if required */ 148 update_fsp_configs(&config_data, &rt_buf); 149 150 memset(¶ms, 0, sizeof(struct fsp_init_params)); 151 params.nvs_buf = nvs_buf; 152 params.rt_buf = (struct fspinit_rtbuf *)&rt_buf; 153 params.continuation = (fsp_continuation_f)asm_continuation; 154 155 init = (fsp_init_f)(fsp_hdr->img_base + fsp_hdr->fsp_init); 156 params_ptr = ¶ms; 157 158 post_code(POST_PRE_MRC); 159 160 /* Load GDT for FSP */ 161 setup_fsp_gdt(); 162 163 /* 164 * Use ASM code to ensure the register value in EAX & EDX 165 * will be passed into fsp_continue 166 */ 167 asm volatile ( 168 "pushl %0;" 169 "call *%%eax;" 170 ".global asm_continuation;" 171 "asm_continuation:;" 172 "movl 4(%%esp), %%eax;" /* status */ 173 "movl 8(%%esp), %%edx;" /* hob_list */ 174 "jmp fsp_continue;" 175 : : "m"(params_ptr), "a"(init) 176 ); 177 178 /* 179 * Should never get here. 180 * Control will continue from fsp_continue. 181 * This line below is to prevent the compiler from optimizing 182 * structure intialization. 183 * 184 * DO NOT REMOVE! 185 */ 186 init(¶ms); 187 } 188 189 u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase) 190 { 191 fsp_notify_f notify; 192 struct fsp_notify_params params; 193 struct fsp_notify_params *params_ptr; 194 u32 status; 195 196 if (!fsp_hdr) 197 fsp_hdr = (struct fsp_header *)find_fsp_header(); 198 199 if (fsp_hdr == NULL) { 200 /* No valid FSP info header */ 201 panic("Invalid FSP header"); 202 } 203 204 notify = (fsp_notify_f)(fsp_hdr->img_base + fsp_hdr->fsp_notify); 205 params.phase = phase; 206 params_ptr = ¶ms; 207 208 /* 209 * Use ASM code to ensure correct parameter is on the stack for 210 * FspNotify as U-Boot is using different ABI from FSP 211 */ 212 asm volatile ( 213 "pushl %1;" /* push notify phase */ 214 "call *%%eax;" /* call FspNotify */ 215 "addl $4, %%esp;" /* clean up the stack */ 216 : "=a"(status) : "m"(params_ptr), "a"(notify), "m"(*params_ptr) 217 ); 218 219 return status; 220 } 221 222 u32 fsp_get_usable_lowmem_top(const void *hob_list) 223 { 224 const struct hob_header *hdr; 225 struct hob_res_desc *res_desc; 226 phys_addr_t phys_start; 227 u32 top; 228 229 /* Get the HOB list for processing */ 230 hdr = hob_list; 231 232 /* * Collect memory ranges */ 233 top = FSP_LOWMEM_BASE; 234 while (!end_of_hob(hdr)) { 235 if (hdr->type == HOB_TYPE_RES_DESC) { 236 res_desc = (struct hob_res_desc *)hdr; 237 if (res_desc->type == RES_SYS_MEM) { 238 phys_start = res_desc->phys_start; 239 /* Need memory above 1MB to be collected here */ 240 if (phys_start >= FSP_LOWMEM_BASE && 241 phys_start < (phys_addr_t)FSP_HIGHMEM_BASE) 242 top += (u32)(res_desc->len); 243 } 244 } 245 hdr = get_next_hob(hdr); 246 } 247 248 return top; 249 } 250 251 u64 fsp_get_usable_highmem_top(const void *hob_list) 252 { 253 const struct hob_header *hdr; 254 struct hob_res_desc *res_desc; 255 phys_addr_t phys_start; 256 u64 top; 257 258 /* Get the HOB list for processing */ 259 hdr = hob_list; 260 261 /* Collect memory ranges */ 262 top = FSP_HIGHMEM_BASE; 263 while (!end_of_hob(hdr)) { 264 if (hdr->type == HOB_TYPE_RES_DESC) { 265 res_desc = (struct hob_res_desc *)hdr; 266 if (res_desc->type == RES_SYS_MEM) { 267 phys_start = res_desc->phys_start; 268 /* Need memory above 4GB to be collected here */ 269 if (phys_start >= (phys_addr_t)FSP_HIGHMEM_BASE) 270 top += (u32)(res_desc->len); 271 } 272 } 273 hdr = get_next_hob(hdr); 274 } 275 276 return top; 277 } 278 279 u64 fsp_get_reserved_mem_from_guid(const void *hob_list, u64 *len, 280 struct efi_guid *guid) 281 { 282 const struct hob_header *hdr; 283 struct hob_res_desc *res_desc; 284 285 /* Get the HOB list for processing */ 286 hdr = hob_list; 287 288 /* Collect memory ranges */ 289 while (!end_of_hob(hdr)) { 290 if (hdr->type == HOB_TYPE_RES_DESC) { 291 res_desc = (struct hob_res_desc *)hdr; 292 if (res_desc->type == RES_MEM_RESERVED) { 293 if (compare_guid(&res_desc->owner, guid)) { 294 if (len) 295 *len = (u32)(res_desc->len); 296 297 return (u64)(res_desc->phys_start); 298 } 299 } 300 } 301 hdr = get_next_hob(hdr); 302 } 303 304 return 0; 305 } 306 307 u32 fsp_get_fsp_reserved_mem(const void *hob_list, u32 *len) 308 { 309 const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_FSP_GUID; 310 u64 length; 311 u32 base; 312 313 base = (u32)fsp_get_reserved_mem_from_guid(hob_list, 314 &length, (struct efi_guid *)&guid); 315 if ((len != 0) && (base != 0)) 316 *len = (u32)length; 317 318 return base; 319 } 320 321 u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len) 322 { 323 const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_TSEG_GUID; 324 u64 length; 325 u32 base; 326 327 base = (u32)fsp_get_reserved_mem_from_guid(hob_list, 328 &length, (struct efi_guid *)&guid); 329 if ((len != 0) && (base != 0)) 330 *len = (u32)length; 331 332 return base; 333 } 334 335 const struct hob_header *fsp_get_next_hob(uint type, const void *hob_list) 336 { 337 const struct hob_header *hdr; 338 339 hdr = hob_list; 340 341 /* Parse the HOB list until end of list or matching type is found */ 342 while (!end_of_hob(hdr)) { 343 if (hdr->type == type) 344 return hdr; 345 346 hdr = get_next_hob(hdr); 347 } 348 349 return NULL; 350 } 351 352 const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid, 353 const void *hob_list) 354 { 355 const struct hob_header *hdr; 356 struct hob_guid *guid_hob; 357 358 hdr = hob_list; 359 while ((hdr = fsp_get_next_hob(HOB_TYPE_GUID_EXT, 360 hdr)) != NULL) { 361 guid_hob = (struct hob_guid *)hdr; 362 if (compare_guid(guid, &(guid_hob->name))) 363 break; 364 hdr = get_next_hob(hdr); 365 } 366 367 return hdr; 368 } 369 370 void *fsp_get_guid_hob_data(const void *hob_list, u32 *len, 371 struct efi_guid *guid) 372 { 373 const struct hob_header *guid_hob; 374 375 guid_hob = fsp_get_next_guid_hob(guid, hob_list); 376 if (guid_hob == NULL) { 377 return NULL; 378 } else { 379 if (len) 380 *len = get_guid_hob_data_size(guid_hob); 381 382 return get_guid_hob_data(guid_hob); 383 } 384 } 385 386 void *fsp_get_nvs_data(const void *hob_list, u32 *len) 387 { 388 const struct efi_guid guid = FSP_NON_VOLATILE_STORAGE_HOB_GUID; 389 390 return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid); 391 } 392 393 void *fsp_get_bootloader_tmp_mem(const void *hob_list, u32 *len) 394 { 395 const struct efi_guid guid = FSP_BOOTLOADER_TEMP_MEM_HOB_GUID; 396 397 return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid); 398 } 399