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+
/*
* Copyright (c) 2015 Google, Inc
*
* EFI information obtained here:
* http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES
*
* This file implements U-Boot running as an EFI application.
*/
#include <common.h>
#include <cpu_func.h>
#include <debug_uart.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <linux/err.h>
#include <linux/types.h>
#include <efi.h>
#include <efi_api.h>
#include <sysreset.h>
DECLARE_GLOBAL_DATA_PTR;
static struct efi_priv *global_priv;
struct efi_system_table *efi_get_sys_table(void)
{
return global_priv->sys_table;
}
unsigned long efi_get_ram_base(void)
{
return global_priv->ram_base;
}
static efi_status_t setup_memory(struct efi_priv *priv)
{
struct efi_boot_services *boot = priv->boot;
efi_physical_addr_t addr;
efi_status_t ret;
int pages;
/*
* Use global_data_ptr instead of gd since it is an assignment. There
* are very few assignments to global_data in U-Boot and this makes
* it easier to find them.
*/
global_data_ptr = efi_malloc(priv, sizeof(struct global_data), &ret);
if (!global_data_ptr)
return ret;
memset(gd, '\0', sizeof(*gd));
gd->malloc_base = (ulong)efi_malloc(priv, CONFIG_VAL(SYS_MALLOC_F_LEN),
&ret);
if (!gd->malloc_base)
return ret;
pages = CONFIG_EFI_RAM_SIZE >> 12;
/*
* Don't allocate any memory above 4GB. U-Boot is a 32-bit application
* so we want it to load below 4GB.
*/
addr = 1ULL << 32;
ret = boot->allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
priv->image_data_type, pages, &addr);
if (ret) {
printf("(using pool %lx) ", ret);
priv->ram_base = (ulong)efi_malloc(priv, CONFIG_EFI_RAM_SIZE,
&ret);
if (!priv->ram_base)
return ret;
priv->use_pool_for_malloc = true;
} else {
priv->ram_base = addr;
}
gd->ram_size = pages << 12;
return 0;
}
static void free_memory(struct efi_priv *priv)
{
struct efi_boot_services *boot = priv->boot;
if (priv->use_pool_for_malloc)
efi_free(priv, (void *)priv->ram_base);
else
boot->free_pages(priv->ram_base, gd->ram_size >> 12);
efi_free(priv, (void *)gd->malloc_base);
efi_free(priv, gd);
global_data_ptr = NULL;
}
/**
* efi_main() - Start an EFI image
*
* This function is called by our EFI start-up code. It handles running
* U-Boot. If it returns, EFI will continue. Another way to get back to EFI
* is via reset_cpu().
*/
efi_status_t EFIAPI efi_main(efi_handle_t image,
struct efi_system_table *sys_table)
{
struct efi_priv local_priv, *priv = &local_priv;
efi_status_t ret;
/* Set up access to EFI data structures */
efi_init(priv, "App", image, sys_table);
global_priv = priv;
/*
* Set up the EFI debug UART so that printf() works. This is
* implemented in the EFI serial driver, serial_efi.c. The application
* can use printf() freely.
*/
debug_uart_init();
ret = setup_memory(priv);
if (ret) {
printf("Failed to set up memory: ret=%lx\n", ret);
return ret;
}
printf("starting\n");
board_init_f(GD_FLG_SKIP_RELOC);
board_init_r(NULL, 0);
free_memory(priv);
return EFI_SUCCESS;
}
static void efi_exit(void)
{
struct efi_priv *priv = global_priv;
free_memory(priv);
printf("U-Boot EFI exiting\n");
priv->boot->exit(priv->parent_image, EFI_SUCCESS, 0, NULL);
}
static int efi_sysreset_request(struct udevice *dev, enum sysreset_t type)
{
efi_exit();
return -EINPROGRESS;
}
static const struct udevice_id efi_sysreset_ids[] = {
{ .compatible = "efi,reset" },
{ }
};
static struct sysreset_ops efi_sysreset_ops = {
.request = efi_sysreset_request,
};
U_BOOT_DRIVER(efi_sysreset) = {
.name = "efi-sysreset",
.id = UCLASS_SYSRESET,
.of_match = efi_sysreset_ids,
.ops = &efi_sysreset_ops,
};
|
