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      1 /*
      2  * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
      3  *
      4  * SPDX-License-Identifier: BSD-3-Clause
      5  */
      6 
      7 #include <assert.h>
      8 #include <bl_common.h>
      9 #include <debug.h>
     10 #include <errno.h>
     11 #include <plat_arm.h>
     12 #include <platform_def.h>
     13 #include <tbbr_img_desc.h>
     14 #include <utils.h>
     15 
     16 /* Struct to keep track of usable memory */
     17 typedef struct bl1_mem_info {
     18 	uintptr_t mem_base;
     19 	unsigned int mem_size;
     20 } bl1_mem_info_t;
     21 
     22 bl1_mem_info_t fwu_addr_map_secure[] = {
     23 	{
     24 		.mem_base = ARM_SHARED_RAM_BASE,
     25 		.mem_size = ARM_SHARED_RAM_SIZE
     26 	},
     27 	{
     28 		.mem_size = 0
     29 	}
     30 };
     31 
     32 bl1_mem_info_t fwu_addr_map_non_secure[] = {
     33 	{
     34 		.mem_base = ARM_NS_DRAM1_BASE,
     35 		.mem_size = ARM_NS_DRAM1_SIZE
     36 	},
     37 	{
     38 		.mem_base = PLAT_ARM_NVM_BASE,
     39 		.mem_size = PLAT_ARM_NVM_SIZE
     40 	},
     41 	{
     42 		.mem_size = 0
     43 	}
     44 };
     45 
     46 int bl1_plat_mem_check(uintptr_t mem_base,
     47 		unsigned int mem_size,
     48 		unsigned int flags)
     49 {
     50 	unsigned int index = 0;
     51 	bl1_mem_info_t *mmap;
     52 
     53 	assert(mem_base);
     54 	assert(mem_size);
     55 	/*
     56 	 * The caller of this function is responsible for checking upfront that
     57 	 * the end address doesn't overflow. We double-check this in debug
     58 	 * builds.
     59 	 */
     60 	assert(!check_uptr_overflow(mem_base, mem_size - 1));
     61 
     62 	/*
     63 	 * Check the given image source and size.
     64 	 */
     65 	if (GET_SECURITY_STATE(flags) == SECURE)
     66 		mmap = fwu_addr_map_secure;
     67 	else
     68 		mmap = fwu_addr_map_non_secure;
     69 
     70 	while (mmap[index].mem_size) {
     71 		if ((mem_base >= mmap[index].mem_base) &&
     72 			((mem_base + mem_size)
     73 			<= (mmap[index].mem_base +
     74 			mmap[index].mem_size)))
     75 			return 0;
     76 
     77 		index++;
     78 	}
     79 
     80 	return -ENOMEM;
     81 }
     82 
     83 /*******************************************************************************
     84  * This function does linear search for image_id and returns image_desc.
     85  ******************************************************************************/
     86 image_desc_t *bl1_plat_get_image_desc(unsigned int image_id)
     87 {
     88 	unsigned int index = 0;
     89 
     90 	while (bl1_tbbr_image_descs[index].image_id != INVALID_IMAGE_ID) {
     91 		if (bl1_tbbr_image_descs[index].image_id == image_id)
     92 			return &bl1_tbbr_image_descs[index];
     93 		index++;
     94 	}
     95 
     96 	return NULL;
     97 }
     98