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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _CBMEM_H_
#define _CBMEM_H_
#include <commonlib/bsd/cbmem_id.h> /* IWYU pragma: export */
#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);
/* 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.
*/
/* The assumption is made that the result of cbmem_top_romstage fits in the size
of uintptr_t in the ramstage. */
extern uintptr_t _cbmem_top_ptr;
void *cbmem_top(void);
/* With CONFIG_RAMSTAGE_CBMEM_TOP_ARG set, the result of cbmem_top is passed via
* calling arguments to the next stage and saved in the global _cbmem_top_ptr
* global variable. Only a romstage callback needs to be implemented by the
* platform. It is up to the stages after romstage to save the calling argument
* in the _cbmem_top_ptr symbol. Without CONFIG_RAMSTAGE_CBMEM_TOP_ARG the same
* implementation as used in romstage will be used.
*/
void *cbmem_top_chipset(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);
#define _CBMEM_INIT_HOOK_UNUSED(init_fn_) __attribute__((unused)) \
static cbmem_init_hook_t init_fn_ ## _unused_ = init_fn_
#define _CBMEM_INIT_HOOK(init_fn_) \
static cbmem_init_hook_t init_fn_ ## _ptr_ __attribute__((used, \
section(".rodata.cbmem_init_hooks"))) = init_fn_
/* Early hooks get executed before other hooks. Use sparingly for hooks that create
CBMEM regions which need to remain in a constant location across boot modes. */
#define _CBMEM_INIT_HOOK_EARLY(init_fn_) \
static cbmem_init_hook_t init_fn_ ## _ptr_ __attribute__((used, \
section(".rodata.cbmem_init_hooks_early"))) = init_fn_
/* Use CBMEM_CREATION_HOOK for code that needs to be run when cbmem is initialized
for the first time. */
#if ENV_CREATES_CBMEM
#define CBMEM_CREATION_HOOK(x) _CBMEM_INIT_HOOK(x)
#else
#define CBMEM_CREATION_HOOK(x) _CBMEM_INIT_HOOK_UNUSED(x)
#endif
/* Use CBMEM_READY_HOOK for code that needs to run in all stages that have cbmem. */
#if ENV_HAS_CBMEM
#define CBMEM_READY_HOOK(x) _CBMEM_INIT_HOOK(x)
#define CBMEM_READY_HOOK_EARLY(x) _CBMEM_INIT_HOOK_EARLY(x)
#else
#define CBMEM_READY_HOOK(x) _CBMEM_INIT_HOOK_UNUSED(x)
#define CBMEM_READY_HOOK_EARLY(x) _CBMEM_INIT_HOOK_UNUSED(x)
#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_SEPARATE_VERSTAGE && !CONFIG(VBOOT_STARTS_IN_ROMSTAGE))
return 0;
return 1;
}
/* Returns 1 after running cbmem init hooks, 0 otherwise. */
static inline int cbmem_online(void)
{
extern int cbmem_initialized;
if (!cbmem_possibly_online())
return 0;
return cbmem_initialized;
}
#endif /* _CBMEM_H_ */
|
