326 lines
9.1 KiB
C
326 lines
9.1 KiB
C
/*
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* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <assert.h>
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#include <string.h>
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#include "platform.h"
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#include "io_storage.h"
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#include "io_driver.h"
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#include "io_semihosting.h"
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#include "semihosting.h" /* For FOPEN_MODE_... */
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#include "io_fip.h"
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#include "io_memmap.h"
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#include "debug.h"
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typedef struct {
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char *image_name;
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int (*image_policy)(io_dev_handle *dev_handle, void **image_spec);
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} plat_io_policy;
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/* IO devices */
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static struct io_plat_data io_data;
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static struct io_dev_connector *sh_dev_con;
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static void *const sh_dev_spec;
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static void *const sh_init_params;
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static io_dev_handle sh_dev_handle;
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static struct io_dev_connector *fip_dev_con;
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static void *const fip_dev_spec;
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static io_dev_handle fip_dev_handle;
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static struct io_dev_connector *memmap_dev_con;
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static void *const memmap_dev_spec;
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static void *const memmap_init_params;
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static io_dev_handle memmap_dev_handle;
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static int fvp_bl2_policy(io_dev_handle *dev_handle, void **image_spec);
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static int fvp_bl31_policy(io_dev_handle *dev_handle, void **image_spec);
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static int fvp_bl32_policy(io_dev_handle *dev_handle, void **image_spec);
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static int fvp_bl33_policy(io_dev_handle *dev_handle, void **image_spec);
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static int fvp_fip_policy(io_dev_handle *dev_handle, void **image_spec);
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static io_block_spec fip_block_spec = {
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.offset = FLASH0_BASE,
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.length = FLASH0_SIZE
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};
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static io_file_spec bl2_file_spec = {
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.path = BL2_IMAGE_NAME,
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.mode = FOPEN_MODE_R
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};
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static io_file_spec bl31_file_spec = {
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.path = BL31_IMAGE_NAME,
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.mode = FOPEN_MODE_R
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};
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static io_file_spec bl32_file_spec = {
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.path = BL32_IMAGE_NAME,
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.mode = FOPEN_MODE_R
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};
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static io_file_spec bl33_file_spec = {
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.path = BL33_IMAGE_NAME,
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.mode = FOPEN_MODE_R
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};
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static plat_io_policy fvp_policy[] = {
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{BL2_IMAGE_NAME, fvp_bl2_policy},
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{BL31_IMAGE_NAME, fvp_bl31_policy},
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{BL32_IMAGE_NAME, fvp_bl32_policy},
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{BL33_IMAGE_NAME, fvp_bl33_policy},
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{FIP_IMAGE_NAME, fvp_fip_policy},
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{NULL, NULL}
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};
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static int open_fip(void *spec)
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{
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int result = IO_FAIL;
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/* See if a Firmware Image Package is available */
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result = io_dev_init(fip_dev_handle, (void *)FIP_IMAGE_NAME);
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if (result == IO_SUCCESS) {
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INFO("Using FIP\n");
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/*TODO: Check image defined in spec is present in FIP. */
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}
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return result;
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}
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static int open_memmap(void *spec)
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{
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int result = IO_FAIL;
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io_handle local_image_handle;
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result = io_dev_init(memmap_dev_handle, memmap_init_params);
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if (result == IO_SUCCESS) {
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result = io_open(memmap_dev_handle, spec, &local_image_handle);
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if (result == IO_SUCCESS) {
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/* INFO("Using Memmap IO\n"); */
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io_close(local_image_handle);
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}
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}
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return result;
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}
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static int open_semihosting(void *spec)
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{
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int result = IO_FAIL;
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io_handle local_image_handle;
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/* See if the file exists on semi-hosting.*/
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result = io_dev_init(sh_dev_handle, sh_init_params);
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if (result == IO_SUCCESS) {
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result = io_open(sh_dev_handle, spec, &local_image_handle);
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if (result == IO_SUCCESS) {
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INFO("Using Semi-hosting IO\n");
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io_close(local_image_handle);
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}
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}
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return result;
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}
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/* Try to load BL2 from Firmware Image Package in FLASH first. If there is no
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* FIP in FLASH or it is broken, try to load the file from semi-hosting.
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*/
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static int fvp_bl2_policy(io_dev_handle *dev_handle, void **image_spec)
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{
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int result = IO_FAIL;
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void *local_image_spec = &bl2_file_spec;
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INFO("Loading BL2\n");
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/* FIP first then fall back to semi-hosting */
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result = open_fip(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = fip_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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} else {
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result = open_semihosting(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = sh_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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}
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}
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return result;
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}
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/* Try to load BL31 from Firmware Image Package in FLASH first. If there is no
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* FIP in FLASH or it is broken, try to load the file from semi-hosting.
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*/
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static int fvp_bl31_policy(io_dev_handle *dev_handle, void **image_spec)
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{
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int result = IO_FAIL;
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void *local_image_spec = &bl31_file_spec;
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INFO("Loading BL31\n");
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/* FIP first then fall back to semi-hosting */
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result = open_fip(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = fip_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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} else {
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result = open_semihosting(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = sh_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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}
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}
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return result;
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}
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/* Try to load BL32 from Firmware Image Package in FLASH first. If there is no
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* FIP in FLASH or it is broken, try to load the file from semi-hosting.
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*/
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static int fvp_bl32_policy(io_dev_handle *dev_handle, void **image_spec)
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{
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int result = IO_FAIL;
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void *local_image_spec = &bl32_file_spec;
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INFO("Loading BL32\n");
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/* FIP first then fall back to semi-hosting */
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result = open_fip(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = fip_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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} else {
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result = open_semihosting(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = sh_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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}
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}
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return result;
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}
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/* Try to load BL33 from Firmware Image Package in FLASH first. If there is no
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* FIP in FLASH or it is broken, try to load the file from semi-hosting.
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*/
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static int fvp_bl33_policy(io_dev_handle *dev_handle, void **image_spec)
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{
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int result = IO_FAIL;
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void *local_image_spec = &bl33_file_spec;
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INFO("Loading BL33 (UEFI)\n");
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/* FIP first then fall back to semi-hosting */
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result = open_fip(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = fip_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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} else {
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result = open_semihosting(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = sh_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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}
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}
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return result;
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}
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/* Try to find FIP on NOR FLASH */
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static int fvp_fip_policy(io_dev_handle *dev_handle, void **image_spec)
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{
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int result = IO_FAIL;
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void *local_image_spec = &fip_block_spec;
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result = open_memmap(local_image_spec);
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if (result == IO_SUCCESS) {
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*dev_handle = memmap_dev_handle;
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*(io_file_spec **)image_spec = local_image_spec;
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}
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return result;
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}
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void io_setup (void)
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{
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int io_result = IO_FAIL;
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/* Initialise the IO layer */
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io_init(&io_data);
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/* Register the IO devices on this platform */
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io_result = register_io_dev_sh(&sh_dev_con);
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assert(io_result == IO_SUCCESS);
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io_result = register_io_dev_fip(&fip_dev_con);
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assert(io_result == IO_SUCCESS);
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io_result = register_io_dev_memmap(&memmap_dev_con);
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assert(io_result == IO_SUCCESS);
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/* Open connections to devices and cache the handles */
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io_result = io_dev_open(sh_dev_con, sh_dev_spec, &sh_dev_handle);
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assert(io_result == IO_SUCCESS);
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io_result = io_dev_open(fip_dev_con, fip_dev_spec, &fip_dev_handle);
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assert(io_result == IO_SUCCESS);
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io_result = io_dev_open(memmap_dev_con, memmap_dev_spec,
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&memmap_dev_handle);
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assert(io_result == IO_SUCCESS);
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/* Ignore improbable errors in release builds */
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(void)io_result;
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}
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/* Return an IO device handle and specification which can be used to access
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* an image. Use this to enforce platform load policy */
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int plat_get_image_source(const char *image_name, io_dev_handle *dev_handle,
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void **image_spec)
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{
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int result = IO_FAIL;
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plat_io_policy *policy;
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assert(image_name != NULL);
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assert(dev_handle != NULL);
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assert(image_spec != NULL);
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policy = fvp_policy;
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while ((policy->image_name != NULL) &&
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(policy->image_policy != NULL)) {
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result = strcmp(policy->image_name, image_name);
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if (result == 0) {
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result = policy->image_policy(dev_handle, image_spec);
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break;
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}
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policy++;
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}
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return result;
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}
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