1 // SPDX-License-Identifier: BSD-3-Clause
2 /*
3 * This file is part of the libpayload project.
4 *
5 * Copyright (C) 2008 Advanced Micro Devices, Inc.
6 * Copyright (C) 2009 coresystems GmbH
7 */
8
9 #include <common.h>
10 #include <net.h>
11 #include <asm/arch/sysinfo.h>
12 #include <asm/global_data.h>
13
14 DECLARE_GLOBAL_DATA_PTR;
15
16 /*
17 * This needs to be in the .data section so that it's copied over during
18 * relocation. By default it's put in the .bss section which is simply filled
19 * with zeroes when transitioning from "ROM", which is really RAM, to other
20 * RAM.
21 */
22 struct sysinfo_t lib_sysinfo __attribute__((section(".data")));
23
24 /*
25 * Some of this is x86 specific, and the rest of it is generic. Right now,
26 * since we only support x86, we'll avoid trying to make lots of infrastructure
27 * we don't need. If in the future, we want to use coreboot on some other
28 * architecture, then take out the generic parsing code and move it elsewhere.
29 */
30
31 /* === Parsing code === */
32 /* This is the generic parsing code. */
33
cb_parse_memory(unsigned char * ptr,struct sysinfo_t * info)34 static void cb_parse_memory(unsigned char *ptr, struct sysinfo_t *info)
35 {
36 struct cb_memory *mem = (struct cb_memory *)ptr;
37 int count = MEM_RANGE_COUNT(mem);
38 int i;
39
40 if (count > SYSINFO_MAX_MEM_RANGES)
41 count = SYSINFO_MAX_MEM_RANGES;
42
43 info->n_memranges = 0;
44
45 for (i = 0; i < count; i++) {
46 struct cb_memory_range *range =
47 (struct cb_memory_range *)MEM_RANGE_PTR(mem, i);
48
49 info->memrange[info->n_memranges].base =
50 UNPACK_CB64(range->start);
51
52 info->memrange[info->n_memranges].size =
53 UNPACK_CB64(range->size);
54
55 info->memrange[info->n_memranges].type = range->type;
56
57 info->n_memranges++;
58 }
59 }
60
cb_parse_serial(unsigned char * ptr,struct sysinfo_t * info)61 static void cb_parse_serial(unsigned char *ptr, struct sysinfo_t *info)
62 {
63 struct cb_serial *ser = (struct cb_serial *)ptr;
64 info->serial = ser;
65 }
66
cb_parse_vbnv(unsigned char * ptr,struct sysinfo_t * info)67 static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info)
68 {
69 struct cb_vbnv *vbnv = (struct cb_vbnv *)ptr;
70
71 info->vbnv_start = vbnv->vbnv_start;
72 info->vbnv_size = vbnv->vbnv_size;
73 }
74
cb_parse_cbmem_entry(unsigned char * ptr,struct sysinfo_t * info)75 static void cb_parse_cbmem_entry(unsigned char *ptr, struct sysinfo_t *info)
76 {
77 struct cb_cbmem_entry *entry = (struct cb_cbmem_entry *)ptr;
78
79 if (entry->id != CBMEM_ID_SMBIOS)
80 return;
81
82 info->smbios_start = entry->address;
83 info->smbios_size = entry->entry_size;
84 }
85
cb_parse_gpios(unsigned char * ptr,struct sysinfo_t * info)86 static void cb_parse_gpios(unsigned char *ptr, struct sysinfo_t *info)
87 {
88 int i;
89 struct cb_gpios *gpios = (struct cb_gpios *)ptr;
90
91 info->num_gpios = (gpios->count < SYSINFO_MAX_GPIOS) ?
92 (gpios->count) : SYSINFO_MAX_GPIOS;
93
94 for (i = 0; i < info->num_gpios; i++)
95 info->gpios[i] = gpios->gpios[i];
96 }
97
cb_parse_vdat(unsigned char * ptr,struct sysinfo_t * info)98 static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info)
99 {
100 struct cb_vdat *vdat = (struct cb_vdat *) ptr;
101
102 info->vdat_addr = vdat->vdat_addr;
103 info->vdat_size = vdat->vdat_size;
104 }
105
cb_parse_tstamp(unsigned char * ptr,struct sysinfo_t * info)106 static void cb_parse_tstamp(unsigned char *ptr, struct sysinfo_t *info)
107 {
108 info->tstamp_table = ((struct cb_cbmem_tab *)ptr)->cbmem_tab;
109 }
110
cb_parse_cbmem_cons(unsigned char * ptr,struct sysinfo_t * info)111 static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info)
112 {
113 info->cbmem_cons = ((struct cb_cbmem_tab *)ptr)->cbmem_tab;
114 }
115
cb_parse_framebuffer(unsigned char * ptr,struct sysinfo_t * info)116 static void cb_parse_framebuffer(unsigned char *ptr, struct sysinfo_t *info)
117 {
118 info->framebuffer = (struct cb_framebuffer *)ptr;
119 }
120
cb_parse_string(unsigned char * ptr,char ** info)121 static void cb_parse_string(unsigned char *ptr, char **info)
122 {
123 *info = (char *)((struct cb_string *)ptr)->string;
124 }
125
cb_parse_unhandled(u32 tag,unsigned char * ptr)126 __weak void cb_parse_unhandled(u32 tag, unsigned char *ptr)
127 {
128 }
129
cb_parse_header(void * addr,int len,struct sysinfo_t * info)130 static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
131 {
132 unsigned char *ptr = addr;
133 struct cb_header *header;
134 int i;
135
136 header = (struct cb_header *)ptr;
137 if (!header->table_bytes)
138 return 0;
139
140 /* Make sure the checksums match. */
141 if (!ip_checksum_ok(header, sizeof(*header)))
142 return -1;
143
144 if (compute_ip_checksum(ptr + sizeof(*header), header->table_bytes) !=
145 header->table_checksum)
146 return -1;
147
148 /* Now, walk the tables. */
149 ptr += header->header_bytes;
150
151 /* Inintialize some fields to sentinel values. */
152 info->vbnv_start = info->vbnv_size = (uint32_t)(-1);
153
154 for (i = 0; i < header->table_entries; i++) {
155 struct cb_record *rec = (struct cb_record *)ptr;
156
157 /* We only care about a few tags here (maybe more later). */
158 switch (rec->tag) {
159 case CB_TAG_FORWARD:
160 return cb_parse_header(
161 (void *)(unsigned long)
162 ((struct cb_forward *)rec)->forward,
163 len, info);
164 continue;
165 case CB_TAG_MEMORY:
166 cb_parse_memory(ptr, info);
167 break;
168 case CB_TAG_SERIAL:
169 cb_parse_serial(ptr, info);
170 break;
171 case CB_TAG_VERSION:
172 cb_parse_string(ptr, &info->version);
173 break;
174 case CB_TAG_EXTRA_VERSION:
175 cb_parse_string(ptr, &info->extra_version);
176 break;
177 case CB_TAG_BUILD:
178 cb_parse_string(ptr, &info->build);
179 break;
180 case CB_TAG_COMPILE_TIME:
181 cb_parse_string(ptr, &info->compile_time);
182 break;
183 case CB_TAG_COMPILE_BY:
184 cb_parse_string(ptr, &info->compile_by);
185 break;
186 case CB_TAG_COMPILE_HOST:
187 cb_parse_string(ptr, &info->compile_host);
188 break;
189 case CB_TAG_COMPILE_DOMAIN:
190 cb_parse_string(ptr, &info->compile_domain);
191 break;
192 case CB_TAG_COMPILER:
193 cb_parse_string(ptr, &info->compiler);
194 break;
195 case CB_TAG_LINKER:
196 cb_parse_string(ptr, &info->linker);
197 break;
198 case CB_TAG_ASSEMBLER:
199 cb_parse_string(ptr, &info->assembler);
200 break;
201 /*
202 * FIXME we should warn on serial if coreboot set up a
203 * framebuffer buf the payload does not know about it.
204 */
205 case CB_TAG_FRAMEBUFFER:
206 cb_parse_framebuffer(ptr, info);
207 break;
208 case CB_TAG_GPIO:
209 cb_parse_gpios(ptr, info);
210 break;
211 case CB_TAG_VDAT:
212 cb_parse_vdat(ptr, info);
213 break;
214 case CB_TAG_TIMESTAMPS:
215 cb_parse_tstamp(ptr, info);
216 break;
217 case CB_TAG_CBMEM_CONSOLE:
218 cb_parse_cbmem_cons(ptr, info);
219 break;
220 case CB_TAG_VBNV:
221 cb_parse_vbnv(ptr, info);
222 break;
223 case CB_TAG_CBMEM_ENTRY:
224 cb_parse_cbmem_entry(ptr, info);
225 break;
226 default:
227 cb_parse_unhandled(rec->tag, ptr);
228 break;
229 }
230
231 ptr += rec->size;
232 }
233
234 return 1;
235 }
236
237 /* == Architecture specific == */
238 /* This is the x86 specific stuff. */
239
get_coreboot_info(struct sysinfo_t * info)240 int get_coreboot_info(struct sysinfo_t *info)
241 {
242 long addr;
243 int ret;
244
245 addr = locate_coreboot_table();
246 if (addr < 0)
247 return addr;
248 ret = cb_parse_header((void *)addr, 0x1000, info);
249 if (!ret)
250 return -ENOENT;
251 gd->arch.coreboot_table = addr;
252 gd->flags |= GD_FLG_SKIP_LL_INIT;
253
254 return 0;
255 }
256