1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2009 coresystems GmbH
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common.h>
#include <asm/arch/ipchecksum.h>
#include <asm/arch/sysinfo.h>
#include <asm/arch/tables.h>
/*
* This needs to be in the .data section so that it's copied over during
* relocation. By default it's put in the .bss section which is simply filled
* with zeroes when transitioning from "ROM", which is really RAM, to other
* RAM.
*/
struct sysinfo_t lib_sysinfo __attribute__((section(".data")));
/*
* Some of this is x86 specific, and the rest of it is generic. Right now,
* since we only support x86, we'll avoid trying to make lots of infrastructure
* we don't need. If in the future, we want to use coreboot on some other
* architecture, then take out the generic parsing code and move it elsewhere.
*/
/* === Parsing code === */
/* This is the generic parsing code. */
static void cb_parse_memory(unsigned char *ptr, struct sysinfo_t *info)
{
struct cb_memory *mem = (struct cb_memory *)ptr;
int count = MEM_RANGE_COUNT(mem);
int i;
if (count > SYSINFO_MAX_MEM_RANGES)
count = SYSINFO_MAX_MEM_RANGES;
info->n_memranges = 0;
for (i = 0; i < count; i++) {
struct cb_memory_range *range =
(struct cb_memory_range *)MEM_RANGE_PTR(mem, i);
info->memrange[info->n_memranges].base =
UNPACK_CB64(range->start);
info->memrange[info->n_memranges].size =
UNPACK_CB64(range->size);
info->memrange[info->n_memranges].type = range->type;
info->n_memranges++;
}
}
static void cb_parse_serial(unsigned char *ptr, struct sysinfo_t *info)
{
struct cb_serial *ser = (struct cb_serial *)ptr;
info->serial = ser;
}
static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info)
{
struct cb_vbnv *vbnv = (struct cb_vbnv *)ptr;
info->vbnv_start = vbnv->vbnv_start;
info->vbnv_size = vbnv->vbnv_size;
}
static void cb_parse_gpios(unsigned char *ptr, struct sysinfo_t *info)
{
int i;
struct cb_gpios *gpios = (struct cb_gpios *)ptr;
info->num_gpios = (gpios->count < SYSINFO_MAX_GPIOS) ?
(gpios->count) : SYSINFO_MAX_GPIOS;
for (i = 0; i < info->num_gpios; i++)
info->gpios[i] = gpios->gpios[i];
}
static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info)
{
struct cb_vdat *vdat = (struct cb_vdat *) ptr;
info->vdat_addr = vdat->vdat_addr;
info->vdat_size = vdat->vdat_size;
}
static void cb_parse_tstamp(unsigned char *ptr, struct sysinfo_t *info)
{
info->tstamp_table = ((struct cb_cbmem_tab *)ptr)->cbmem_tab;
}
static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info)
{
info->cbmem_cons = ((struct cb_cbmem_tab *)ptr)->cbmem_tab;
}
static void cb_parse_framebuffer(unsigned char *ptr, struct sysinfo_t *info)
{
info->framebuffer = (struct cb_framebuffer *)ptr;
}
static void cb_parse_string(unsigned char *ptr, char **info)
{
*info = (char *)((struct cb_string *)ptr)->string;
}
static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
{
struct cb_header *header;
unsigned char *ptr = (unsigned char *)addr;
int i;
for (i = 0; i < len; i += 16, ptr += 16) {
header = (struct cb_header *)ptr;
if (!strncmp((const char *)header->signature, "LBIO", 4))
break;
}
/* We walked the entire space and didn't find anything. */
if (i >= len)
return -1;
if (!header->table_bytes)
return 0;
/* Make sure the checksums match. */
if (ipchksum((u16 *) header, sizeof(*header)) != 0)
return -1;
if (ipchksum((u16 *) (ptr + sizeof(*header)),
header->table_bytes) != header->table_checksum)
return -1;
/* Now, walk the tables. */
ptr += header->header_bytes;
/* Inintialize some fields to sentinel values. */
info->vbnv_start = info->vbnv_size = (uint32_t)(-1);
for (i = 0; i < header->table_entries; i++) {
struct cb_record *rec = (struct cb_record *)ptr;
/* We only care about a few tags here (maybe more later). */
switch (rec->tag) {
case CB_TAG_FORWARD:
return cb_parse_header(
(void *)(unsigned long)
((struct cb_forward *)rec)->forward,
len, info);
continue;
case CB_TAG_MEMORY:
cb_parse_memory(ptr, info);
break;
case CB_TAG_SERIAL:
cb_parse_serial(ptr, info);
break;
case CB_TAG_VERSION:
cb_parse_string(ptr, &info->version);
break;
case CB_TAG_EXTRA_VERSION:
cb_parse_string(ptr, &info->extra_version);
break;
case CB_TAG_BUILD:
cb_parse_string(ptr, &info->build);
break;
case CB_TAG_COMPILE_TIME:
cb_parse_string(ptr, &info->compile_time);
break;
case CB_TAG_COMPILE_BY:
cb_parse_string(ptr, &info->compile_by);
break;
case CB_TAG_COMPILE_HOST:
cb_parse_string(ptr, &info->compile_host);
break;
case CB_TAG_COMPILE_DOMAIN:
cb_parse_string(ptr, &info->compile_domain);
break;
case CB_TAG_COMPILER:
cb_parse_string(ptr, &info->compiler);
break;
case CB_TAG_LINKER:
cb_parse_string(ptr, &info->linker);
break;
case CB_TAG_ASSEMBLER:
cb_parse_string(ptr, &info->assembler);
break;
/*
* FIXME we should warn on serial if coreboot set up a
* framebuffer buf the payload does not know about it.
*/
case CB_TAG_FRAMEBUFFER:
cb_parse_framebuffer(ptr, info);
break;
case CB_TAG_GPIO:
cb_parse_gpios(ptr, info);
break;
case CB_TAG_VDAT:
cb_parse_vdat(ptr, info);
break;
case CB_TAG_TIMESTAMPS:
cb_parse_tstamp(ptr, info);
break;
case CB_TAG_CBMEM_CONSOLE:
cb_parse_cbmem_cons(ptr, info);
break;
case CB_TAG_VBNV:
cb_parse_vbnv(ptr, info);
break;
}
ptr += rec->size;
}
return 1;
}
/* == Architecture specific == */
/* This is the x86 specific stuff. */
int get_coreboot_info(struct sysinfo_t *info)
{
int ret = cb_parse_header((void *)0x00000000, 0x1000, info);
if (ret != 1)
ret = cb_parse_header((void *)0x000f0000, 0x1000, info);
return (ret == 1) ? 0 : -1;
}
|
