blob: 0c16a5fdd38a983e23c06c998aa782319c29e971 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glass867a6ac2015-07-31 09:31:36 -06002/*
3 * Copyright (c) 2015 Google, Inc
4 *
Simon Glass867a6ac2015-07-31 09:31:36 -06005 * EFI information obtained here:
6 * http://wiki.phoenix.com/wiki/index.php/EFI_BOOT_SERVICES
7 *
8 * Common EFI functions
9 */
10
11#include <common.h>
12#include <debug_uart.h>
13#include <errno.h>
Simon Glass336d4612020-02-03 07:36:16 -070014#include <malloc.h>
Simon Glass867a6ac2015-07-31 09:31:36 -060015#include <linux/err.h>
16#include <linux/types.h>
17#include <efi.h>
18#include <efi_api.h>
19
Simon Glass867a6ac2015-07-31 09:31:36 -060020/*
21 * Unfortunately we cannot access any code outside what is built especially
22 * for the stub. lib/string.c is already being built for the U-Boot payload
23 * so it uses the wrong compiler flags. Add our own memset() here.
24 */
25static void efi_memset(void *ptr, int ch, int size)
26{
27 char *dest = ptr;
28
29 while (size-- > 0)
30 *dest++ = ch;
31}
32
33/*
34 * Since the EFI stub cannot access most of the U-Boot code, add our own
35 * simple console output functions here. The EFI app will not use these since
36 * it can use the normal console.
37 */
38void efi_putc(struct efi_priv *priv, const char ch)
39{
40 struct efi_simple_text_output_protocol *con = priv->sys_table->con_out;
41 uint16_t ucode[2];
42
43 ucode[0] = ch;
44 ucode[1] = '\0';
45 con->output_string(con, ucode);
46}
47
48void efi_puts(struct efi_priv *priv, const char *str)
49{
50 while (*str)
51 efi_putc(priv, *str++);
52}
53
54int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
55 struct efi_system_table *sys_table)
56{
Heinrich Schuchardtdec88e42019-04-20 07:39:11 +020057 efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
Simon Glass867a6ac2015-07-31 09:31:36 -060058 struct efi_boot_services *boot = sys_table->boottime;
59 struct efi_loaded_image *loaded_image;
60 int ret;
61
62 efi_memset(priv, '\0', sizeof(*priv));
63 priv->sys_table = sys_table;
64 priv->boot = sys_table->boottime;
65 priv->parent_image = image;
66 priv->run = sys_table->runtime;
67
68 efi_puts(priv, "U-Boot EFI ");
69 efi_puts(priv, banner);
70 efi_putc(priv, ' ');
71
72 ret = boot->open_protocol(priv->parent_image, &loaded_image_guid,
Heinrich Schuchardtfaea1042018-09-26 05:27:54 +020073 (void **)&loaded_image, priv->parent_image,
Simon Glass867a6ac2015-07-31 09:31:36 -060074 NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
75 if (ret) {
76 efi_puts(priv, "Failed to get loaded image protocol\n");
77 return ret;
78 }
79 priv->image_data_type = loaded_image->image_data_type;
80
81 return 0;
82}
83
84void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp)
85{
86 struct efi_boot_services *boot = priv->boot;
87 void *buf = NULL;
88
89 *retp = boot->allocate_pool(priv->image_data_type, size, &buf);
90
91 return buf;
92}
93
94void efi_free(struct efi_priv *priv, void *ptr)
95{
96 struct efi_boot_services *boot = priv->boot;
97
98 boot->free_pool(ptr);
99}