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
|
/*
* EFI application loader
*
* Copyright (c) 2016 Alexander Graf
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <part_efi.h>
#include <efi_api.h>
/* No need for efi loader support in SPL */
#if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)
#include <linux/list.h>
/* #define DEBUG_EFI */
#ifdef DEBUG_EFI
#define EFI_ENTRY(format, ...) do { \
efi_restore_gd(); \
printf("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \
} while(0)
#else
#define EFI_ENTRY(format, ...) do { \
efi_restore_gd(); \
} while(0)
#endif
#define EFI_EXIT(ret) efi_exit_func(ret);
extern struct efi_runtime_services efi_runtime_services;
extern struct efi_system_table systab;
extern const struct efi_simple_text_output_protocol efi_con_out;
extern const struct efi_simple_input_interface efi_con_in;
extern const struct efi_console_control_protocol efi_console_control;
extern const efi_guid_t efi_guid_console_control;
extern const efi_guid_t efi_guid_device_path;
extern const efi_guid_t efi_guid_loaded_image;
extern unsigned int __efi_runtime_start, __efi_runtime_stop;
extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
/*
* While UEFI objects can have callbacks, you can also call functions on
* protocols (classes) themselves. This struct maps a protocol GUID to its
* interface (usually a struct with callback functions).
*/
struct efi_class_map {
const efi_guid_t *guid;
const void *interface;
};
/*
* When the UEFI payload wants to open a protocol on an object to get its
* interface (usually a struct with callback functions), this struct maps the
* protocol GUID to the respective protocol handler open function for that
* object protocol combination.
*/
struct efi_handler {
const efi_guid_t *guid;
efi_status_t (EFIAPI *open)(void *handle,
efi_guid_t *protocol, void **protocol_interface,
void *agent_handle, void *controller_handle,
uint32_t attributes);
};
/*
* UEFI has a poor man's OO model where one "object" can be polymorphic and have
* multiple different protocols (classes) attached to it.
*
* This struct is the parent struct for all of our actual implementation objects
* that can include it to make themselves an EFI object
*/
struct efi_object {
/* Every UEFI object is part of a global object list */
struct list_head link;
/* We support up to 4 "protocols" an object can be accessed through */
struct efi_handler protocols[4];
/* The object spawner can either use this for data or as identifier */
void *handle;
};
/* This list contains all UEFI objects we know of */
extern struct list_head efi_obj_list;
/* Called by bootefi to make all disk storage accessible as EFI objects */
int efi_disk_register(void);
/* Called by bootefi to make GOP (graphical) interface available */
int efi_gop_register(void);
/* Called by bootefi to make the network interface available */
int efi_net_register(void **handle);
/* Called by networking code to memorize the dhcp ack package */
void efi_net_set_dhcp_ack(void *pkt, int len);
/*
* Stub implementation for a protocol opener that just returns the handle as
* interface
*/
efi_status_t efi_return_handle(void *handle,
efi_guid_t *protocol, void **protocol_interface,
void *agent_handle, void *controller_handle,
uint32_t attributes);
/* Called from places to check whether a timer expired */
void efi_timer_check(void);
/* PE loader implementation */
void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
/* Called once to store the pristine gd pointer */
void efi_save_gd(void);
/* Called from EFI_ENTRY on callback entry to put gd into the gd register */
void efi_restore_gd(void);
/* Called from EFI_EXIT on callback exit to restore the gd register */
efi_status_t efi_exit_func(efi_status_t ret);
/* Call this to relocate the runtime section to an address space */
void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
/* Call this to set the current device name */
void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
/* Generic EFI memory allocator, call this to get memory */
void *efi_alloc(uint64_t len, int memory_type);
/* More specific EFI memory allocator, called by EFI payloads */
efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages,
uint64_t *memory);
/* EFI memory free function. Not implemented today */
efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
/* Returns the EFI memory map */
efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
struct efi_mem_desc *memory_map,
unsigned long *map_key,
unsigned long *descriptor_size,
uint32_t *descriptor_version);
/* Adds a range into the EFI memory map */
uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
bool overlap_only_ram);
/* Called by board init to initialize the EFI memory map */
int efi_memory_init(void);
#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
extern void *efi_bounce_buffer;
#define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
#endif
/* Convert strings from normal C strings to uEFI strings */
static inline void ascii2unicode(u16 *unicode, char *ascii)
{
while (*ascii)
*(unicode++) = *(ascii++);
}
/*
* Use these to indicate that your code / data should go into the EFI runtime
* section and thus still be available when the OS is running
*/
#define EFI_RUNTIME_DATA __attribute__ ((section ("efi_runtime_data")))
#define EFI_RUNTIME_TEXT __attribute__ ((section ("efi_runtime_text")))
#else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
/* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
#define EFI_RUNTIME_DATA
#define EFI_RUNTIME_TEXT
/* No loader configured, stub out EFI_ENTRY */
static inline void efi_restore_gd(void) { }
static inline void efi_set_bootdev(const char *dev, const char *devnr,
const char *path) { }
static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
#endif
|
