aboutsummaryrefslogtreecommitdiff
path: root/plat/fvp/plat_io_storage.c
blob: 588605e24538fc70f0c3a14b4192eaf938e8218e (plain)
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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/*
 * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of ARM nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <assert.h>
#include <string.h>
#include "platform.h"
#include "io_storage.h"
#include "io_driver.h"
#include "io_semihosting.h"
#include "semihosting.h"	/* For FOPEN_MODE_... */
#include "io_fip.h"
#include "io_memmap.h"
#include "debug.h"

/* IO devices */
static struct io_plat_data io_data;
static struct io_dev_connector *sh_dev_con;
static void *const sh_dev_spec;
static void *const sh_init_params;
static io_dev_handle sh_dev_handle;
static struct io_dev_connector *fip_dev_con;
static void *const fip_dev_spec;
static io_dev_handle fip_dev_handle;
static struct io_dev_connector *memmap_dev_con;
static void *const memmap_dev_spec;
static void *const memmap_init_params;
static io_dev_handle memmap_dev_handle;

static io_block_spec fip_block_spec = {
	.offset = FLASH0_BASE,
	.length = FLASH0_SIZE
};

static io_file_spec bl2_file_spec = {
	.path = BL2_IMAGE_NAME,
	.mode = FOPEN_MODE_R
};

static io_file_spec bl31_file_spec = {
	.path = BL31_IMAGE_NAME,
	.mode = FOPEN_MODE_R
};

static io_file_spec bl32_file_spec = {
	.path = BL32_IMAGE_NAME,
	.mode = FOPEN_MODE_R
};

static io_file_spec bl33_file_spec = {
	.path = BL33_IMAGE_NAME,
	.mode = FOPEN_MODE_R
};

static int open_fip(void* spec);
static int open_memmap(void* spec);

typedef struct {
	char * image_name;
	io_dev_handle* dev_handle;
	void* image_spec;
	int (*check)(void* spec);
} plat_io_policy;

static plat_io_policy policies[] = {
	{ FIP_IMAGE_NAME,  &memmap_dev_handle, &fip_block_spec, open_memmap },
	{ BL2_IMAGE_NAME,  &fip_dev_handle,    &bl2_file_spec,  open_fip    },
	{ BL31_IMAGE_NAME, &fip_dev_handle,    &bl31_file_spec, open_fip    },
	{ BL32_IMAGE_NAME, &fip_dev_handle,    &bl32_file_spec, open_fip    },
	{ BL33_IMAGE_NAME, &fip_dev_handle,    &bl33_file_spec, open_fip    },
	{0,0,0}
};


static int open_fip(void *spec)
{
	int result = IO_FAIL;

	/* See if a Firmware Image Package is available */
	result = io_dev_init(fip_dev_handle, (void *)FIP_IMAGE_NAME);
	if (result == IO_SUCCESS) {
		INFO("Using FIP\n");
		/*TODO: Check image defined in spec is present in FIP. */
	}
	return result;
}


static int open_memmap(void *spec)
{
	int result = IO_FAIL;
	io_handle local_image_handle;

	result = io_dev_init(memmap_dev_handle, memmap_init_params);
	if (result == IO_SUCCESS) {
		result = io_open(memmap_dev_handle, spec, &local_image_handle);
		if (result == IO_SUCCESS) {
			/* INFO("Using Memmap IO\n"); */
			io_close(local_image_handle);
		}
	}
	return result;
}


static int open_semihosting(void *spec)
{
	int result = IO_FAIL;
	io_handle local_image_handle;

	/* See if the file exists on semi-hosting.*/
	result = io_dev_init(sh_dev_handle, sh_init_params);
	if (result == IO_SUCCESS) {
		result = io_open(sh_dev_handle, spec, &local_image_handle);
		if (result == IO_SUCCESS) {
			INFO("Using Semi-hosting IO\n");
			io_close(local_image_handle);
		}
	}
	return result;
}

void io_setup (void)
{
	int io_result = IO_FAIL;

	/* Initialise the IO layer */
	io_init(&io_data);

	/* Register the IO devices on this platform */
	io_result = register_io_dev_sh(&sh_dev_con);
	assert(io_result == IO_SUCCESS);

	io_result = register_io_dev_fip(&fip_dev_con);
	assert(io_result == IO_SUCCESS);

	io_result = register_io_dev_memmap(&memmap_dev_con);
	assert(io_result == IO_SUCCESS);

	/* Open connections to devices and cache the handles */
	io_result = io_dev_open(sh_dev_con, sh_dev_spec, &sh_dev_handle);
	assert(io_result == IO_SUCCESS);

	io_result = io_dev_open(fip_dev_con, fip_dev_spec, &fip_dev_handle);
	assert(io_result == IO_SUCCESS);

	io_result = io_dev_open(memmap_dev_con, memmap_dev_spec,
				&memmap_dev_handle);
	assert(io_result == IO_SUCCESS);

	/* Ignore improbable errors in release builds */
	(void)io_result;
}


/* Return an IO device handle and specification which can be used to access
 * an image. Use this to enforce platform load policy */
int plat_get_image_source(const char *image_name, io_dev_handle *dev_handle,
			  void **image_spec)
{
	int result = IO_FAIL;
	plat_io_policy *policy;

	if ((image_name != NULL) && (dev_handle != NULL) &&
	    (image_spec != NULL)) {
		policy = policies;
		while (policy->image_name != NULL) {
			if (strcmp(policy->image_name, image_name) == 0) {
				result = policy->check(policy->image_spec);
				if (result == IO_SUCCESS) {
					*(io_file_spec**)image_spec = policy->image_spec;
					*dev_handle=*(policy->dev_handle);
					break;
				} else {
					result = open_semihosting(policy->image_spec);
					if (result == IO_SUCCESS) {
						*dev_handle = sh_dev_handle;
						*(io_file_spec **)image_spec = policy->image_spec;
					}
				}
			}
			policy++;
		}
	} else {
		result = IO_FAIL;
	}
	return result;
}