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feat(fvp): add plat API to validate that passed region is non-secure

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Added a platform function to check passed region is within
the Non-Secure region of DRAM.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ie5808fa6a1b6e6bc99f4185fa8acc52af0d5f14d
This commit is contained in:
Manish V Badarkhe 2022-07-04 14:51:07 +01:00
parent b1392f429c
commit d5f225d95d
2 changed files with 43 additions and 0 deletions
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7
include/plat/common/plat_drtm.h
View file

@ -64,4 +64,11 @@ uint64_t plat_drtm_get_tcb_hash_features(void);
int plat_set_drtm_error(uint64_t error_code);
int plat_get_drtm_error(uint64_t *error_code);
/*
* Platform-specific function to ensure passed region lies within
* Non-Secure region of DRAM
*/
int plat_drtm_validate_ns_region(uintptr_t region_start,
size_t region_size);
#endif /* PLAT_DRTM_H */

36
plat/arm/board/fvp/fvp_drtm_addr.c Normal file
View file

@ -0,0 +1,36 @@
/*
* Copyright (c) 2022 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#include <stdint.h>
#include <plat/common/platform.h>
#include <platform_def.h>
/*******************************************************************************
* Check passed region is within Non-Secure region of DRAM
******************************************************************************/
int plat_drtm_validate_ns_region(uintptr_t region_start,
size_t region_size)
{
uintptr_t region_end = region_start + region_size - 1;
if (region_start >= region_end) {
return -1;
} else if ((region_start >= ARM_NS_DRAM1_BASE) &&
(region_start < (ARM_NS_DRAM1_BASE + ARM_NS_DRAM1_SIZE)) &&
(region_end >= ARM_NS_DRAM1_BASE) &&
(region_end < (ARM_NS_DRAM1_BASE + ARM_NS_DRAM1_SIZE))) {
return 0;
} else if ((region_start >= ARM_DRAM2_BASE) &&
(region_start < (ARM_DRAM2_BASE + ARM_DRAM2_SIZE)) &&
(region_end >= ARM_DRAM2_BASE) &&
(region_end < (ARM_DRAM2_BASE + ARM_DRAM2_SIZE))) {
return 0;
}
return -1;
}