/* * 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 #include #include #include #include #include #include /* For FOPEN_MODE_... */ #include #include #include /* IO devices */ static io_plat_data_t io_data; static io_dev_connector_t *sh_dev_con; static void *const sh_dev_spec; static void *const sh_init_params; static io_dev_handle sh_dev_handle; static io_dev_connector_t *fip_dev_con; static void *const fip_dev_spec; static io_dev_handle fip_dev_handle; static io_dev_connector_t *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_t fip_block_spec = { .offset = FLASH0_BASE, .length = FLASH0_SIZE }; static io_file_spec_t bl2_file_spec = { .path = BL2_IMAGE_NAME, .mode = FOPEN_MODE_RB }; static io_file_spec_t bl31_file_spec = { .path = BL31_IMAGE_NAME, .mode = FOPEN_MODE_RB }; static io_file_spec_t bl32_file_spec = { .path = BL32_IMAGE_NAME, .mode = FOPEN_MODE_RB }; static io_file_spec_t bl33_file_spec = { .path = BL33_IMAGE_NAME, .mode = FOPEN_MODE_RB }; static int open_fip(void *spec); static int open_memmap(void *spec); struct plat_io_policy { char *image_name; io_dev_handle *dev_handle; void *image_spec; int (*check)(void *spec); }; static struct 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; struct 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_t **)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_t **)image_spec = policy->image_spec; } } } policy++; } } else { result = IO_FAIL; } return result; }