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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 coresystems GmbH
* Copyright (C) 2013 Google, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _CBMEM_H_
#define _CBMEM_H_
#include <commonlib/cbmem_id.h>
#include <stddef.h>
#include <stdint.h>
#include <boot/coreboot_tables.h>
#define CBMEM_FSP_HOB_PTR 0x614
struct cbmem_entry;
/*
* The dynamic cbmem infrastructure allows for growing cbmem dynamically as
* things are added. It requires an external function, cbmem_top(), to be
* implemented by the board or chipset to define the upper address where
* cbmem lives. This address is required to be a 32-bit address. Additionally,
* the address needs to be consistent in both romstage and ramstage. The
* dynamic cbmem infrastructure allocates new regions below the last allocated
* region. Regions are defined by a cbmem_entry struct that is opaque. Regions
* may be removed, but the last one added is the only that can be removed.
*/
#define DYN_CBMEM_ALIGN_SIZE (4096)
#define CBMEM_ROOT_SIZE DYN_CBMEM_ALIGN_SIZE
/* The root region is at least DYN_CBMEM_ALIGN_SIZE . */
#define CBMEM_ROOT_MIN_SIZE DYN_CBMEM_ALIGN_SIZE
#define CBMEM_LG_ALIGN CBMEM_ROOT_MIN_SIZE
/* Small allocation parameters. */
#define CBMEM_SM_ROOT_SIZE 1024
#define CBMEM_SM_ALIGN 32
/* Determine the size for CBMEM root and the small allocations */
static inline size_t cbmem_overhead_size(void)
{
return 2 * CBMEM_ROOT_MIN_SIZE;
}
/* By default cbmem is attempted to be recovered. Returns 0 if cbmem was
* recovered or 1 if cbmem had to be reinitialized. */
int cbmem_initialize(void);
int cbmem_initialize_id_size(u32 id, u64 size);
/* Initialize cbmem to be empty. */
void cbmem_initialize_empty(void);
void cbmem_initialize_empty_id_size(u32 id, u64 size);
/* Optional hook for platforms to initialize cbmem_top() value. When employed
* it's called a single time during boot at cbmem initialization/recovery
* time. */
void cbmem_top_init(void);
/* Return the top address for dynamic cbmem. The address returned needs to
* be consistent across romstage and ramstage, and it is required to be
* below 4GiB for 32bit coreboot builds. On 64bit coreboot builds there's no
* upper limit. This should not be called before memory is initialized.
*/
void *cbmem_top(void);
/* Add a cbmem entry of a given size and id. These return NULL on failure. The
* add function performs a find first and do not check against the original
* size. */
const struct cbmem_entry *cbmem_entry_add(u32 id, u64 size);
/* Find a cbmem entry of a given id. These return NULL on failure. */
const struct cbmem_entry *cbmem_entry_find(u32 id);
/* Remove a region defined by a cbmem_entry. Returns 0 on success, < 0 on
* error. Note: A cbmem_entry cannot be removed unless it was the last one
* added. */
int cbmem_entry_remove(const struct cbmem_entry *entry);
/* cbmem_entry accessors to get pointer and size of a cbmem_entry. */
void *cbmem_entry_start(const struct cbmem_entry *entry);
u64 cbmem_entry_size(const struct cbmem_entry *entry);
/* Returns 0 if old cbmem was recovered. Recovery is only attempted if
* s3resume is non-zero. */
int cbmem_recovery(int s3resume);
/* Add a cbmem entry of a given size and id. These return NULL on failure. The
* add function performs a find first and do not check against the original
* size. */
void *cbmem_add(u32 id, u64 size);
/* Find a cbmem entry of a given id. These return NULL on failure. */
void *cbmem_find(u32 id);
/* Indicate to each hook if cbmem is being recovered or not. */
typedef void (* const cbmem_init_hook_t)(int is_recovery);
void cbmem_run_init_hooks(int is_recovery);
/* Ramstage only functions. */
/* Add the cbmem memory used to the memory map at boot. */
void cbmem_add_bootmem(void);
/* Return the cbmem memory used */
void cbmem_get_region(void **baseptr, size_t *size);
void cbmem_list(void);
void cbmem_add_records_to_cbtable(struct lb_header *header);
#if ENV_RAMSTAGE
#define ROMSTAGE_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused_ = init_fn_;
#define RAMSTAGE_CBMEM_INIT_HOOK(init_fn_) \
static cbmem_init_hook_t init_fn_ ## _ptr_ __attribute__((used, \
section(".rodata.cbmem_init_hooks"))) = init_fn_;
#define POSTCAR_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused2_ = init_fn_;
#elif ENV_ROMSTAGE
#define ROMSTAGE_CBMEM_INIT_HOOK(init_fn_) \
static cbmem_init_hook_t init_fn_ ## _ptr_ __attribute__((used, \
section(".rodata.cbmem_init_hooks"))) = init_fn_;
#define RAMSTAGE_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused_ = init_fn_;
#define POSTCAR_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused2_ = init_fn_;
#elif ENV_POSTCAR
#define ROMSTAGE_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused2_ = init_fn_;
#define RAMSTAGE_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused_ = init_fn_;
#define POSTCAR_CBMEM_INIT_HOOK(init_fn_) \
static cbmem_init_hook_t init_fn_ ## _ptr_ __attribute__((used, \
section(".rodata.cbmem_init_hooks"))) = init_fn_;
#else
#define ROMSTAGE_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused_ = init_fn_;
#define RAMSTAGE_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused2_ = init_fn_;
#define POSTCAR_CBMEM_INIT_HOOK(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused3_ = init_fn_;
#endif /* ENV_RAMSTAGE */
/* Any new chipset and board must implement cbmem_top() for both
* romstage and ramstage to support early features like COLLECT_TIMESTAMPS
* and CBMEM_CONSOLE. Sometimes it is necessary to have cbmem_top()
* value stored in nvram to enable early recovery on S3 path.
*/
#if CONFIG(ARCH_X86)
void backup_top_of_low_cacheable(uintptr_t ramtop);
uintptr_t restore_top_of_low_cacheable(void);
#endif
/*
* Returns 0 for the stages where we know that cbmem does not come online.
* Even if this function returns 1 for romstage, depending upon the point in
* bootup, cbmem might not actually be online.
*/
static inline int cbmem_possibly_online(void)
{
if (ENV_BOOTBLOCK)
return 0;
if (ENV_VERSTAGE && CONFIG(VBOOT_STARTS_IN_BOOTBLOCK))
return 0;
return 1;
}
#endif /* _CBMEM_H_ */
|
