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/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
#include <desc_image_load.h>
extern bl_mem_params_node_t *bl_mem_params_desc_ptr;
extern unsigned int bl_mem_params_desc_num;
static bl_load_info_t bl_load_info;
static bl_params_t next_bl_params;
/*******************************************************************************
* This function flushes the data structures so that they are visible
* in memory for the next BL image.
******************************************************************************/
void flush_bl_params_desc(void)
{
flush_dcache_range((uintptr_t)bl_mem_params_desc_ptr,
sizeof(*bl_mem_params_desc_ptr) * bl_mem_params_desc_num);
flush_dcache_range((uintptr_t)&next_bl_params,
sizeof(next_bl_params));
}
/*******************************************************************************
* This function returns the index for given image_id, within the
* image descriptor array provided by bl_image_info_descs_ptr, if the
* image is found else it returns -1.
******************************************************************************/
int get_bl_params_node_index(unsigned int image_id)
{
int index;
assert(image_id != INVALID_IMAGE_ID);
for (index = 0; index < bl_mem_params_desc_num; index++) {
if (bl_mem_params_desc_ptr[index].image_id == image_id)
return index;
}
return -1;
}
/*******************************************************************************
* This function returns the pointer to `bl_mem_params_node_t` object for
* given image_id, within the image descriptor array provided by
* bl_mem_params_desc_ptr, if the image is found else it returns NULL.
******************************************************************************/
bl_mem_params_node_t *get_bl_mem_params_node(unsigned int image_id)
{
int index;
assert(image_id != INVALID_IMAGE_ID);
index = get_bl_params_node_index(image_id);
if (index >= 0)
return &bl_mem_params_desc_ptr[index];
else
return NULL;
}
/*******************************************************************************
* This function creates the list of loadable images, by populating and
* linking each `bl_load_info_node_t` type node, using the internal array
* of image descriptor provided by bl_mem_params_desc_ptr. It also populates
* and returns `bl_load_info_t` type structure that contains head of the list
* of loadable images.
******************************************************************************/
bl_load_info_t *get_bl_load_info_from_mem_params_desc(void)
{
int index = 0;
/* If there is no image to start with, return NULL */
if (!bl_mem_params_desc_num)
return NULL;
/* Assign initial data structures */
bl_load_info_node_t *bl_node_info =
&bl_mem_params_desc_ptr[index].load_node_mem;
bl_load_info.head = bl_node_info;
SET_PARAM_HEAD(&bl_load_info, PARAM_BL_LOAD_INFO, VERSION_2, 0);
/* Go through the image descriptor array and create the list */
for (; index < bl_mem_params_desc_num; index++) {
/* Populate the image information */
bl_node_info->image_id = bl_mem_params_desc_ptr[index].image_id;
bl_node_info->image_info = &bl_mem_params_desc_ptr[index].image_info;
/* Link next image if present */
if ((index + 1) < bl_mem_params_desc_num) {
/* Get the memory and link the next node */
bl_node_info->next_load_info =
&bl_mem_params_desc_ptr[index + 1].load_node_mem;
bl_node_info = bl_node_info->next_load_info;
}
}
return &bl_load_info;
}
/*******************************************************************************
* This function creates the list of executable images, by populating and
* linking each `bl_params_node_t` type node, using the internal array of
* image descriptor provided by bl_mem_params_desc_ptr. It also populates
* and returns `bl_params_t` type structure that contains head of the list
* of executable images.
******************************************************************************/
bl_params_t *get_next_bl_params_from_mem_params_desc(void)
{
int count;
unsigned int img_id = 0;
int link_index = 0;
bl_params_node_t *bl_current_exec_node = NULL;
bl_params_node_t *bl_last_exec_node = NULL;
bl_mem_params_node_t *desc_ptr;
/* If there is no image to start with, return NULL */
if (!bl_mem_params_desc_num)
return NULL;
/* Get the list HEAD */
for (count = 0; count < bl_mem_params_desc_num; count++) {
desc_ptr = &bl_mem_params_desc_ptr[count];
if ((EP_GET_EXE(desc_ptr->ep_info.h.attr) == EXECUTABLE) &&
(EP_GET_FIRST_EXE(desc_ptr->ep_info.h.attr) == EP_FIRST_EXE)) {
next_bl_params.head = &desc_ptr->params_node_mem;
link_index = count;
break;
}
}
/* Make sure we have a HEAD node */
assert(next_bl_params.head != NULL);
/* Populate the HEAD information */
SET_PARAM_HEAD(&next_bl_params, PARAM_BL_PARAMS, VERSION_2, 0);
/*
* Go through the image descriptor array and create the list.
* This bounded loop is to make sure that we are not looping forever.
*/
for (count = 0 ; count < bl_mem_params_desc_num; count++) {
desc_ptr = &bl_mem_params_desc_ptr[link_index];
/* Make sure the image is executable */
assert(EP_GET_EXE(desc_ptr->ep_info.h.attr) == EXECUTABLE);
/* Get the memory for current node */
bl_current_exec_node = &desc_ptr->params_node_mem;
/* Populate the image information */
bl_current_exec_node->image_id = desc_ptr->image_id;
bl_current_exec_node->image_info = &desc_ptr->image_info;
bl_current_exec_node->ep_info = &desc_ptr->ep_info;
if (bl_last_exec_node) {
/* Assert if loop detected */
assert(bl_last_exec_node->next_params_info == NULL);
/* Link the previous node to the current one */
bl_last_exec_node->next_params_info = bl_current_exec_node;
}
/* Update the last node */
bl_last_exec_node = bl_current_exec_node;
/* If no next hand-off image then break out */
img_id = desc_ptr->next_handoff_image_id;
if (img_id == INVALID_IMAGE_ID)
break;
/* Get the index for the next hand-off image */
link_index = get_bl_params_node_index(img_id);
assert((link_index > 0) &&
(link_index < bl_mem_params_desc_num));
}
/* Invalid image is expected to terminate the loop */
assert(img_id == INVALID_IMAGE_ID);
return &next_bl_params;
}
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