blob: 34b4101e1a0bda96b01074034a2a7f2a6a4e1b61 [file] [log] [blame]
/*
* Copyright (c) 2015-2020, ARM Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common/debug.h>
#include <drivers/io/io_driver.h>
#include <drivers/io/io_fip.h>
#include <drivers/io/io_memmap.h>
#include <drivers/io/io_storage.h>
#include <lib/utils.h>
#include <plat/arm/common/arm_fconf_getter.h>
#include <plat/arm/common/arm_fconf_io_storage.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/common/platform.h>
#include <platform_def.h>
/* IO devices */
static const io_dev_connector_t *fip_dev_con;
uintptr_t fip_dev_handle;
static const io_dev_connector_t *memmap_dev_con;
uintptr_t memmap_dev_handle;
/* Weak definitions may be overridden in specific ARM standard platform */
#pragma weak plat_arm_io_setup
#pragma weak plat_arm_get_alt_image_source
int open_fip(const uintptr_t spec)
{
int result;
uintptr_t local_image_handle;
/* See if a Firmware Image Package is available */
result = io_dev_init(fip_dev_handle, (uintptr_t)FIP_IMAGE_ID);
if (result == 0) {
result = io_open(fip_dev_handle, spec, &local_image_handle);
if (result == 0) {
VERBOSE("Using FIP\n");
io_close(local_image_handle);
}
}
return result;
}
int open_memmap(const uintptr_t spec)
{
int result;
uintptr_t local_image_handle;
result = io_dev_init(memmap_dev_handle, (uintptr_t)NULL);
if (result == 0) {
result = io_open(memmap_dev_handle, spec, &local_image_handle);
if (result == 0) {
VERBOSE("Using Memmap\n");
io_close(local_image_handle);
}
}
return result;
}
int arm_io_setup(void)
{
int io_result;
io_result = register_io_dev_fip(&fip_dev_con);
if (io_result < 0) {
return io_result;
}
io_result = register_io_dev_memmap(&memmap_dev_con);
if (io_result < 0) {
return io_result;
}
/* Open connections to devices and cache the handles */
io_result = io_dev_open(fip_dev_con, (uintptr_t)NULL,
&fip_dev_handle);
if (io_result < 0) {
return io_result;
}
io_result = io_dev_open(memmap_dev_con, (uintptr_t)NULL,
&memmap_dev_handle);
return io_result;
}
void plat_arm_io_setup(void)
{
int err;
err = arm_io_setup();
if (err < 0) {
panic();
}
}
int plat_arm_get_alt_image_source(
unsigned int image_id __unused,
uintptr_t *dev_handle __unused,
uintptr_t *image_spec __unused)
{
/* By default do not try an alternative */
return -ENOENT;
}
/* 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(unsigned int image_id, uintptr_t *dev_handle,
uintptr_t *image_spec)
{
int result;
const struct plat_io_policy *policy;
policy = FCONF_GET_PROPERTY(arm, io_policies, image_id);
result = policy->check(policy->image_spec);
if (result == 0) {
*image_spec = policy->image_spec;
*dev_handle = *(policy->dev_handle);
} else {
VERBOSE("Trying alternative IO\n");
result = plat_arm_get_alt_image_source(image_id, dev_handle,
image_spec);
}
return result;
}
/*
* See if a Firmware Image Package is available,
* by checking if TOC is valid or not.
*/
bool arm_io_is_toc_valid(void)
{
return (io_dev_init(fip_dev_handle, (uintptr_t)FIP_IMAGE_ID) == 0);
}