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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <bootmem.h>
#include <boot/tables.h>
#include <boot/coreboot_tables.h>
#include <arch/pirq_routing.h>
#include <arch/smp/mpspec.h>
#include <acpi/acpi.h>
#include <commonlib/helpers.h>
#include <string.h>
#include <cbmem.h>
#include <smbios.h>
static unsigned long write_pirq_table(unsigned long rom_table_end)
{
unsigned long high_table_pointer;
#define MAX_PIRQ_TABLE_SIZE (4 * 1024)
post_code(0x9a);
/* This table must be between 0x0f0000 and 0x100000 */
rom_table_end = write_pirq_routing_table(rom_table_end);
rom_table_end = ALIGN_UP(rom_table_end, 1024);
/* And add a high table version for those payloads that
* want to live in the F segment
*/
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_PIRQ,
MAX_PIRQ_TABLE_SIZE);
if (high_table_pointer) {
unsigned long new_high_table_pointer;
new_high_table_pointer =
write_pirq_routing_table(high_table_pointer);
// FIXME make pirq table code intelligent enough to know how
// much space it's going to need.
if (new_high_table_pointer > (high_table_pointer
+ MAX_PIRQ_TABLE_SIZE))
printk(BIOS_ERR, "Increase PIRQ size.\n");
printk(BIOS_DEBUG, "PIRQ table: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
}
return rom_table_end;
}
static unsigned long write_mptable(unsigned long rom_table_end)
{
unsigned long high_table_pointer;
#define MAX_MP_TABLE_SIZE (4 * 1024)
post_code(0x9b);
/* The smp table must be in 0-1K, 639K-640K, or 960K-1M */
rom_table_end = write_smp_table(rom_table_end);
rom_table_end = ALIGN_UP(rom_table_end, 1024);
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_MPTABLE,
MAX_MP_TABLE_SIZE);
if (high_table_pointer) {
unsigned long new_high_table_pointer;
new_high_table_pointer = write_smp_table(high_table_pointer);
// FIXME make mp table code intelligent enough to know how
// much space it's going to need.
if (new_high_table_pointer > (high_table_pointer
+ MAX_MP_TABLE_SIZE))
printk(BIOS_ERR, "Increase MP table size.\n");
printk(BIOS_DEBUG, "MP table: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
}
return rom_table_end;
}
static unsigned long write_acpi_table(unsigned long rom_table_end)
{
unsigned long high_table_pointer;
const size_t max_acpi_size = CONFIG_MAX_ACPI_TABLE_SIZE_KB * KiB;
post_code(0x9c);
/* Write ACPI tables to F segment and high tables area */
/* Ok, this is a bit hacky still, because some day we want to have this
* completely dynamic. But right now we are setting fixed sizes.
* It's probably still better than the old high_table_base code because
* now at least we know when we have an overflow in the area.
*
* We want to use 1MB - 64K for Resume backup. We use 512B for TOC and
* 512 byte for GDT, 4K for PIRQ and 4K for MP table and 8KB for the
* coreboot table. This leaves us with 47KB for all of ACPI. Let's see
* how far we get.
*/
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_ACPI,
max_acpi_size);
if (high_table_pointer) {
unsigned long acpi_start = high_table_pointer;
unsigned long new_high_table_pointer;
rom_table_end = ALIGN_UP(rom_table_end, 16);
new_high_table_pointer = write_acpi_tables(high_table_pointer);
if (new_high_table_pointer > (high_table_pointer
+ max_acpi_size))
printk(BIOS_ERR, "Increase ACPI size\n");
printk(BIOS_DEBUG, "ACPI tables: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
/* Now we need to create a low table copy of the RSDP. */
/* First we look for the high table RSDP */
while (acpi_start < new_high_table_pointer) {
if (memcmp(((acpi_rsdp_t *)acpi_start)->signature,
RSDP_SIG, 8) == 0)
break;
acpi_start++;
}
/* Now, if we found the RSDP, we take the RSDT and XSDT pointer
* from it in order to write the low RSDP
*/
if (acpi_start < new_high_table_pointer) {
acpi_rsdp_t *low_rsdp = (acpi_rsdp_t *)rom_table_end,
*high_rsdp = (acpi_rsdp_t *)acpi_start;
/* Technically rsdp length varies but coreboot always
writes longest size available. */
memcpy(low_rsdp, high_rsdp, sizeof(acpi_rsdp_t));
} else {
printk(BIOS_ERR, "Didn't find RSDP in high table.\n");
}
rom_table_end = ALIGN_UP(rom_table_end + sizeof(acpi_rsdp_t), 16);
} else {
rom_table_end = write_acpi_tables(rom_table_end);
rom_table_end = ALIGN_UP(rom_table_end, 1024);
}
return rom_table_end;
}
static unsigned long write_smbios_table(unsigned long rom_table_end)
{
unsigned long high_table_pointer;
#define MAX_SMBIOS_SIZE (32 * KiB)
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_SMBIOS,
MAX_SMBIOS_SIZE);
if (high_table_pointer) {
unsigned long new_high_table_pointer;
/*
* Clear the entire region to ensure the unused space doesn't
* contain garbage from a previous boot, like stale table
* signatures that could be found by the OS.
*/
memset((void *)high_table_pointer, 0, MAX_SMBIOS_SIZE);
new_high_table_pointer =
smbios_write_tables(high_table_pointer);
rom_table_end = ALIGN_UP(rom_table_end, 16);
memcpy((void *)rom_table_end, (void *)high_table_pointer,
sizeof(struct smbios_entry));
rom_table_end += sizeof(struct smbios_entry);
if (new_high_table_pointer > (high_table_pointer
+ MAX_SMBIOS_SIZE))
printk(BIOS_ERR, "Increase SMBIOS size\n");
printk(BIOS_DEBUG, "SMBIOS tables: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
} else {
unsigned long new_rom_table_end;
new_rom_table_end = smbios_write_tables(rom_table_end);
printk(BIOS_DEBUG, "SMBIOS size %ld bytes\n", new_rom_table_end
- rom_table_end);
rom_table_end = ALIGN_UP(new_rom_table_end, 16);
}
return rom_table_end;
}
/* Start forwarding table at 0x500, so we don't run into conflicts with the BDA
* in case our data structures grow beyond 0x400. Only GDT
* and the coreboot table use low_tables.
*/
#define FORWARDING_TABLE_ADDR ((uintptr_t)0x500)
static uintptr_t forwarding_table = FORWARDING_TABLE_ADDR;
void arch_write_tables(uintptr_t coreboot_table)
{
size_t sz;
unsigned long rom_table_end = 0xf0000;
/* This table must be between 0x0f0000 and 0x100000 */
if (CONFIG(GENERATE_PIRQ_TABLE))
rom_table_end = write_pirq_table(rom_table_end);
/* The smp table must be in 0-1K, 639K-640K, or 960K-1M */
if (CONFIG(GENERATE_MP_TABLE))
rom_table_end = write_mptable(rom_table_end);
if (CONFIG(HAVE_ACPI_TABLES))
rom_table_end = write_acpi_table(rom_table_end);
if (CONFIG(GENERATE_SMBIOS_TABLES))
rom_table_end = write_smbios_table(rom_table_end);
sz = write_coreboot_forwarding_table(forwarding_table, coreboot_table);
forwarding_table += sz;
/* Align up to page boundary for historical consistency. */
forwarding_table = ALIGN_UP(forwarding_table, 4*KiB);
/* Tell static analysis we know value is left unused. */
(void)rom_table_end;
}
void bootmem_arch_add_ranges(void)
{
/* Memory from 0 through the forwarding_table is reserved. */
const uintptr_t base = 0;
bootmem_add_range(base, forwarding_table - base, BM_MEM_TABLE);
}
|
