1 /*
2 * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8
9 #include <common/debug.h>
10 #include <drivers/io/io_driver.h>
11 #include <drivers/io/io_semihosting.h>
12 #include <drivers/io/io_storage.h>
13 #include <lib/semihosting.h>
14 #include <plat/arm/common/plat_arm.h>
15 #include <plat/common/common_def.h>
16
17 /* Semihosting filenames */
18 #define BL33_IMAGE_NAME "bl33.bin"
19
20 #if TRUSTED_BOARD_BOOT
21 #define TRUSTED_KEY_CERT_NAME "trusted_key.crt"
22 #define NT_FW_KEY_CERT_NAME "nt_fw_key.crt"
23 #define NT_FW_CONTENT_CERT_NAME "nt_fw_content.crt"
24 #endif /* TRUSTED_BOARD_BOOT */
25
26 /* IO devices */
27 static const io_dev_connector_t *sh_dev_con;
28 static uintptr_t sh_dev_handle;
29
30 static const io_file_spec_t sh_file_spec[] = {
31 [BL33_IMAGE_ID] = {
32 .path = BL33_IMAGE_NAME,
33 .mode = FOPEN_MODE_RB
34 },
35 #if TRUSTED_BOARD_BOOT
36 [TRUSTED_KEY_CERT_ID] = {
37 .path = TRUSTED_KEY_CERT_NAME,
38 .mode = FOPEN_MODE_RB
39 },
40 [NON_TRUSTED_FW_KEY_CERT_ID] = {
41 .path = NT_FW_KEY_CERT_NAME,
42 .mode = FOPEN_MODE_RB
43 },
44 [NON_TRUSTED_FW_CONTENT_CERT_ID] = {
45 .path = NT_FW_CONTENT_CERT_NAME,
46 .mode = FOPEN_MODE_RB
47 },
48 #endif /* TRUSTED_BOARD_BOOT */
49 };
50
51
open_semihosting(const uintptr_t spec)52 static int open_semihosting(const uintptr_t spec)
53 {
54 int result;
55 uintptr_t local_image_handle;
56
57 /* See if the file exists on semi-hosting.*/
58 result = io_dev_init(sh_dev_handle, (uintptr_t)NULL);
59 if (result == 0) {
60 result = io_open(sh_dev_handle, spec, &local_image_handle);
61 if (result == 0) {
62 VERBOSE("Using Semi-hosting IO\n");
63 io_close(local_image_handle);
64 }
65 }
66 return result;
67 }
68
plat_arm_io_setup(void)69 void plat_arm_io_setup(void)
70 {
71 int io_result;
72
73 io_result = arm_io_setup();
74 if (io_result < 0) {
75 panic();
76 }
77
78 /* Register the additional IO devices on this platform */
79 io_result = register_io_dev_sh(&sh_dev_con);
80 if (io_result < 0) {
81 panic();
82 }
83
84 /* Open connections to devices and cache the handles */
85 io_result = io_dev_open(sh_dev_con, (uintptr_t)NULL, &sh_dev_handle);
86 if (io_result < 0) {
87 panic();
88 }
89 }
90
91 /*
92 * FVP_R provides semihosting as an alternative to load images
93 */
plat_arm_get_alt_image_source(unsigned int image_id,uintptr_t * dev_handle,uintptr_t * image_spec)94 int plat_arm_get_alt_image_source(unsigned int image_id, uintptr_t *dev_handle,
95 uintptr_t *image_spec)
96 {
97 int result = open_semihosting((const uintptr_t)&sh_file_spec[image_id]);
98
99 if (result == 0) {
100 *dev_handle = sh_dev_handle;
101 *image_spec = (uintptr_t)&sh_file_spec[image_id];
102 }
103
104 return result;
105 }
106