Sandrine Bailleux | 798140d | 2014-07-17 16:06:39 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <assert.h> |
| 32 | #include <debug.h> |
| 33 | #include <io_driver.h> |
| 34 | #include <io_fip.h> |
| 35 | #include <io_memmap.h> |
| 36 | #include <io_storage.h> |
| 37 | #include <platform_def.h> |
| 38 | #include <semihosting.h> /* For FOPEN_MODE_... */ |
| 39 | #include <string.h> |
| 40 | |
| 41 | /* IO devices */ |
| 42 | static const io_dev_connector_t *fip_dev_con; |
| 43 | static uintptr_t fip_dev_spec; |
| 44 | static uintptr_t fip_dev_handle; |
| 45 | static const io_dev_connector_t *memmap_dev_con; |
| 46 | static uintptr_t memmap_dev_spec; |
| 47 | static uintptr_t memmap_init_params; |
| 48 | static uintptr_t memmap_dev_handle; |
| 49 | |
| 50 | static const io_block_spec_t fip_block_spec = { |
| 51 | .offset = FLASH_BASE, |
| 52 | .length = FLASH_SIZE |
| 53 | }; |
| 54 | |
| 55 | static const io_file_spec_t bl2_file_spec = { |
| 56 | .path = BL2_IMAGE_NAME, |
| 57 | .mode = FOPEN_MODE_RB |
| 58 | }; |
| 59 | |
| 60 | static const io_file_spec_t bl30_file_spec = { |
| 61 | .path = BL30_IMAGE_NAME, |
| 62 | .mode = FOPEN_MODE_RB |
| 63 | }; |
| 64 | |
| 65 | static const io_file_spec_t bl31_file_spec = { |
| 66 | .path = BL31_IMAGE_NAME, |
| 67 | .mode = FOPEN_MODE_RB |
| 68 | }; |
| 69 | |
| 70 | static const io_file_spec_t bl33_file_spec = { |
| 71 | .path = BL33_IMAGE_NAME, |
| 72 | .mode = FOPEN_MODE_RB |
| 73 | }; |
| 74 | |
| 75 | static int open_fip(const uintptr_t spec); |
| 76 | static int open_memmap(const uintptr_t spec); |
| 77 | |
| 78 | struct plat_io_policy { |
| 79 | const char *image_name; |
| 80 | uintptr_t *dev_handle; |
| 81 | uintptr_t image_spec; |
| 82 | int (*check)(const uintptr_t spec); |
| 83 | }; |
| 84 | |
| 85 | static const struct plat_io_policy policies[] = { |
| 86 | { |
| 87 | FIP_IMAGE_NAME, |
| 88 | &memmap_dev_handle, |
| 89 | (uintptr_t)&fip_block_spec, |
| 90 | open_memmap |
| 91 | }, { |
| 92 | BL2_IMAGE_NAME, |
| 93 | &fip_dev_handle, |
| 94 | (uintptr_t)&bl2_file_spec, |
| 95 | open_fip |
| 96 | }, { |
| 97 | BL30_IMAGE_NAME, |
| 98 | &fip_dev_handle, |
| 99 | (uintptr_t)&bl30_file_spec, |
| 100 | open_fip |
| 101 | }, { |
| 102 | BL31_IMAGE_NAME, |
| 103 | &fip_dev_handle, |
| 104 | (uintptr_t)&bl31_file_spec, |
| 105 | open_fip |
| 106 | }, { |
| 107 | BL33_IMAGE_NAME, |
| 108 | &fip_dev_handle, |
| 109 | (uintptr_t)&bl33_file_spec, |
| 110 | open_fip |
| 111 | }, { |
| 112 | 0, 0, 0 |
| 113 | } |
| 114 | }; |
| 115 | |
| 116 | |
| 117 | static int open_fip(const uintptr_t spec) |
| 118 | { |
| 119 | int result = IO_FAIL; |
| 120 | |
| 121 | /* See if a Firmware Image Package is available */ |
| 122 | result = io_dev_init(fip_dev_handle, (uintptr_t)FIP_IMAGE_NAME); |
| 123 | if (result == IO_SUCCESS) { |
| 124 | INFO("Using FIP\n"); |
| 125 | /*TODO: Check image defined in spec is present in FIP. */ |
| 126 | } |
| 127 | return result; |
| 128 | } |
| 129 | |
| 130 | |
| 131 | static int open_memmap(const uintptr_t spec) |
| 132 | { |
| 133 | int result = IO_FAIL; |
| 134 | uintptr_t local_image_handle; |
| 135 | |
| 136 | result = io_dev_init(memmap_dev_handle, memmap_init_params); |
| 137 | if (result == IO_SUCCESS) { |
| 138 | result = io_open(memmap_dev_handle, spec, &local_image_handle); |
| 139 | if (result == IO_SUCCESS) { |
| 140 | /* INFO("Using Memmap IO\n"); */ |
| 141 | io_close(local_image_handle); |
| 142 | } |
| 143 | } |
| 144 | return result; |
| 145 | } |
| 146 | |
| 147 | void io_setup(void) |
| 148 | { |
| 149 | int io_result = IO_FAIL; |
| 150 | |
| 151 | /* Register the IO devices on this platform */ |
| 152 | io_result = register_io_dev_fip(&fip_dev_con); |
| 153 | assert(io_result == IO_SUCCESS); |
| 154 | |
| 155 | io_result = register_io_dev_memmap(&memmap_dev_con); |
| 156 | assert(io_result == IO_SUCCESS); |
| 157 | |
| 158 | /* Open connections to devices and cache the handles */ |
| 159 | io_result = io_dev_open(fip_dev_con, fip_dev_spec, &fip_dev_handle); |
| 160 | assert(io_result == IO_SUCCESS); |
| 161 | |
| 162 | io_result = io_dev_open(memmap_dev_con, memmap_dev_spec, |
| 163 | &memmap_dev_handle); |
| 164 | assert(io_result == IO_SUCCESS); |
| 165 | |
| 166 | /* Ignore improbable errors in release builds */ |
| 167 | (void)io_result; |
| 168 | } |
| 169 | |
| 170 | |
| 171 | /* Return an IO device handle and specification which can be used to access |
| 172 | * an image. Use this to enforce platform load policy */ |
| 173 | int plat_get_image_source(const char *image_name, uintptr_t *dev_handle, |
| 174 | uintptr_t *image_spec) |
| 175 | { |
| 176 | int result = IO_FAIL; |
| 177 | const struct plat_io_policy *policy; |
| 178 | |
| 179 | if ((image_name != NULL) && (dev_handle != NULL) && |
| 180 | (image_spec != NULL)) { |
| 181 | policy = policies; |
| 182 | while (policy->image_name != NULL) { |
| 183 | if (strcmp(policy->image_name, image_name) == 0) { |
| 184 | result = policy->check(policy->image_spec); |
| 185 | if (result == IO_SUCCESS) { |
| 186 | *image_spec = policy->image_spec; |
| 187 | *dev_handle = *(policy->dev_handle); |
| 188 | break; |
| 189 | } |
| 190 | } |
| 191 | policy++; |
| 192 | } |
| 193 | } else { |
| 194 | result = IO_FAIL; |
| 195 | } |
| 196 | return result; |
| 197 | } |