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 */
compare_guid(const struct efi_guid * guid1,const struct efi_guid * guid2)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
find_fsp_header(void)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
fsp_continue(u32 status,void * hob_list)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
fsp_init(u32 stack_top,u32 boot_mode,void * nvs_buf)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 fsp_hdr = find_fsp_header();
114 if (fsp_hdr == NULL) {
115 /* No valid FSP info header was found */
116 panic("Invalid FSP header");
117 }
118
119 config_data.common.fsp_hdr = fsp_hdr;
120 config_data.common.stack_top = stack_top;
121 config_data.common.boot_mode = boot_mode;
122
123 #ifdef CONFIG_FSP_USE_UPD
124 /* Get VPD region start */
125 fsp_vpd = (struct vpd_region *)(fsp_hdr->img_base +
126 fsp_hdr->cfg_region_off);
127
128 /* Verify the VPD data region is valid */
129 assert(fsp_vpd->sign == VPD_IMAGE_ID);
130
131 fsp_upd = &config_data.fsp_upd;
132
133 /* Copy default data from Flash */
134 memcpy(fsp_upd, (void *)(fsp_hdr->img_base + fsp_vpd->upd_offset),
135 sizeof(struct upd_region));
136
137 /* Verify the UPD data region is valid */
138 assert(fsp_upd->terminator == UPD_TERMINATOR);
139 #endif
140
141 memset(&rt_buf, 0, sizeof(struct fspinit_rtbuf));
142
143 /* Override any configuration if required */
144 update_fsp_configs(&config_data, &rt_buf);
145
146 memset(¶ms, 0, sizeof(struct fsp_init_params));
147 params.nvs_buf = nvs_buf;
148 params.rt_buf = (struct fspinit_rtbuf *)&rt_buf;
149 params.continuation = (fsp_continuation_f)asm_continuation;
150
151 init = (fsp_init_f)(fsp_hdr->img_base + fsp_hdr->fsp_init);
152 params_ptr = ¶ms;
153
154 post_code(POST_PRE_MRC);
155
156 /* Load GDT for FSP */
157 setup_fsp_gdt();
158
159 /*
160 * Use ASM code to ensure the register value in EAX & EDX
161 * will be passed into fsp_continue
162 */
163 asm volatile (
164 "pushl %0;"
165 "call *%%eax;"
166 ".global asm_continuation;"
167 "asm_continuation:;"
168 "movl 4(%%esp), %%eax;" /* status */
169 "movl 8(%%esp), %%edx;" /* hob_list */
170 "jmp fsp_continue;"
171 : : "m"(params_ptr), "a"(init)
172 );
173
174 /*
175 * Should never get here.
176 * Control will continue from fsp_continue.
177 * This line below is to prevent the compiler from optimizing
178 * structure intialization.
179 *
180 * DO NOT REMOVE!
181 */
182 init(¶ms);
183 }
184
fsp_notify(struct fsp_header * fsp_hdr,u32 phase)185 u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase)
186 {
187 fsp_notify_f notify;
188 struct fsp_notify_params params;
189 struct fsp_notify_params *params_ptr;
190 u32 status;
191
192 if (!fsp_hdr)
193 fsp_hdr = (struct fsp_header *)find_fsp_header();
194
195 if (fsp_hdr == NULL) {
196 /* No valid FSP info header */
197 panic("Invalid FSP header");
198 }
199
200 notify = (fsp_notify_f)(fsp_hdr->img_base + fsp_hdr->fsp_notify);
201 params.phase = phase;
202 params_ptr = ¶ms;
203
204 /*
205 * Use ASM code to ensure correct parameter is on the stack for
206 * FspNotify as U-Boot is using different ABI from FSP
207 */
208 asm volatile (
209 "pushl %1;" /* push notify phase */
210 "call *%%eax;" /* call FspNotify */
211 "addl $4, %%esp;" /* clean up the stack */
212 : "=a"(status) : "m"(params_ptr), "a"(notify), "m"(*params_ptr)
213 );
214
215 return status;
216 }
217
fsp_get_usable_lowmem_top(const void * hob_list)218 u32 fsp_get_usable_lowmem_top(const void *hob_list)
219 {
220 const struct hob_header *hdr;
221 struct hob_res_desc *res_desc;
222 phys_addr_t phys_start;
223 u32 top;
224 #ifdef CONFIG_FSP_BROKEN_HOB
225 struct hob_mem_alloc *res_mem;
226 phys_addr_t mem_base = 0;
227 #endif
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
246 #ifdef CONFIG_FSP_BROKEN_HOB
247 /*
248 * Find out the lowest memory base address allocated by FSP
249 * for the boot service data
250 */
251 if (hdr->type == HOB_TYPE_MEM_ALLOC) {
252 res_mem = (struct hob_mem_alloc *)hdr;
253 if (!mem_base)
254 mem_base = res_mem->mem_base;
255 if (res_mem->mem_base < mem_base)
256 mem_base = res_mem->mem_base;
257 }
258 #endif
259
260 hdr = get_next_hob(hdr);
261 }
262
263 #ifdef CONFIG_FSP_BROKEN_HOB
264 /*
265 * Check whether the memory top address is below the FSP HOB list.
266 * If not, use the lowest memory base address allocated by FSP as
267 * the memory top address. This is to prevent U-Boot relocation
268 * overwrites the important boot service data which is used by FSP,
269 * otherwise the subsequent call to fsp_notify() will fail.
270 */
271 if (top > (u32)hob_list) {
272 debug("Adjust memory top address due to a buggy FSP\n");
273 top = (u32)mem_base;
274 }
275 #endif
276
277 return top;
278 }
279
fsp_get_usable_highmem_top(const void * hob_list)280 u64 fsp_get_usable_highmem_top(const void *hob_list)
281 {
282 const struct hob_header *hdr;
283 struct hob_res_desc *res_desc;
284 phys_addr_t phys_start;
285 u64 top;
286
287 /* Get the HOB list for processing */
288 hdr = hob_list;
289
290 /* Collect memory ranges */
291 top = FSP_HIGHMEM_BASE;
292 while (!end_of_hob(hdr)) {
293 if (hdr->type == HOB_TYPE_RES_DESC) {
294 res_desc = (struct hob_res_desc *)hdr;
295 if (res_desc->type == RES_SYS_MEM) {
296 phys_start = res_desc->phys_start;
297 /* Need memory above 4GB to be collected here */
298 if (phys_start >= (phys_addr_t)FSP_HIGHMEM_BASE)
299 top += (u32)(res_desc->len);
300 }
301 }
302 hdr = get_next_hob(hdr);
303 }
304
305 return top;
306 }
307
fsp_get_reserved_mem_from_guid(const void * hob_list,u64 * len,struct efi_guid * guid)308 u64 fsp_get_reserved_mem_from_guid(const void *hob_list, u64 *len,
309 struct efi_guid *guid)
310 {
311 const struct hob_header *hdr;
312 struct hob_res_desc *res_desc;
313
314 /* Get the HOB list for processing */
315 hdr = hob_list;
316
317 /* Collect memory ranges */
318 while (!end_of_hob(hdr)) {
319 if (hdr->type == HOB_TYPE_RES_DESC) {
320 res_desc = (struct hob_res_desc *)hdr;
321 if (res_desc->type == RES_MEM_RESERVED) {
322 if (compare_guid(&res_desc->owner, guid)) {
323 if (len)
324 *len = (u32)(res_desc->len);
325
326 return (u64)(res_desc->phys_start);
327 }
328 }
329 }
330 hdr = get_next_hob(hdr);
331 }
332
333 return 0;
334 }
335
fsp_get_fsp_reserved_mem(const void * hob_list,u32 * len)336 u32 fsp_get_fsp_reserved_mem(const void *hob_list, u32 *len)
337 {
338 const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_FSP_GUID;
339 u64 length;
340 u32 base;
341
342 base = (u32)fsp_get_reserved_mem_from_guid(hob_list,
343 &length, (struct efi_guid *)&guid);
344 if ((len != 0) && (base != 0))
345 *len = (u32)length;
346
347 return base;
348 }
349
fsp_get_tseg_reserved_mem(const void * hob_list,u32 * len)350 u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len)
351 {
352 const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_TSEG_GUID;
353 u64 length;
354 u32 base;
355
356 base = (u32)fsp_get_reserved_mem_from_guid(hob_list,
357 &length, (struct efi_guid *)&guid);
358 if ((len != 0) && (base != 0))
359 *len = (u32)length;
360
361 return base;
362 }
363
fsp_get_next_hob(uint type,const void * hob_list)364 const struct hob_header *fsp_get_next_hob(uint type, const void *hob_list)
365 {
366 const struct hob_header *hdr;
367
368 hdr = hob_list;
369
370 /* Parse the HOB list until end of list or matching type is found */
371 while (!end_of_hob(hdr)) {
372 if (hdr->type == type)
373 return hdr;
374
375 hdr = get_next_hob(hdr);
376 }
377
378 return NULL;
379 }
380
fsp_get_next_guid_hob(const struct efi_guid * guid,const void * hob_list)381 const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid,
382 const void *hob_list)
383 {
384 const struct hob_header *hdr;
385 struct hob_guid *guid_hob;
386
387 hdr = hob_list;
388 while ((hdr = fsp_get_next_hob(HOB_TYPE_GUID_EXT,
389 hdr)) != NULL) {
390 guid_hob = (struct hob_guid *)hdr;
391 if (compare_guid(guid, &(guid_hob->name)))
392 break;
393 hdr = get_next_hob(hdr);
394 }
395
396 return hdr;
397 }
398
fsp_get_guid_hob_data(const void * hob_list,u32 * len,struct efi_guid * guid)399 void *fsp_get_guid_hob_data(const void *hob_list, u32 *len,
400 struct efi_guid *guid)
401 {
402 const struct hob_header *guid_hob;
403
404 guid_hob = fsp_get_next_guid_hob(guid, hob_list);
405 if (guid_hob == NULL) {
406 return NULL;
407 } else {
408 if (len)
409 *len = get_guid_hob_data_size(guid_hob);
410
411 return get_guid_hob_data(guid_hob);
412 }
413 }
414
fsp_get_nvs_data(const void * hob_list,u32 * len)415 void *fsp_get_nvs_data(const void *hob_list, u32 *len)
416 {
417 const struct efi_guid guid = FSP_NON_VOLATILE_STORAGE_HOB_GUID;
418
419 return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid);
420 }
421
fsp_get_bootloader_tmp_mem(const void * hob_list,u32 * len)422 void *fsp_get_bootloader_tmp_mem(const void *hob_list, u32 *len)
423 {
424 const struct efi_guid guid = FSP_BOOTLOADER_TEMP_MEM_HOB_GUID;
425
426 return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid);
427 }
428