28 lines
516 B
C
28 lines
516 B
C
/*
|
|
* Copyright (c) 2022, Arm Limited. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <arch.h>
|
|
#include <arch_features.h>
|
|
#include <arch_helpers.h>
|
|
|
|
void brbe_enable(void)
|
|
{
|
|
uint64_t val;
|
|
|
|
if (is_feat_brbe_present()) {
|
|
/*
|
|
* MDCR_EL3.SBRBE = 0b01
|
|
*
|
|
* Allows BRBE usage in non-secure world and prohibited in
|
|
* secure world.
|
|
*/
|
|
val = read_mdcr_el3();
|
|
val &= ~(MDCR_SBRBE_MASK << MDCR_SBRBE_SHIFT);
|
|
val |= (0x1UL << MDCR_SBRBE_SHIFT);
|
|
write_mdcr_el3(val);
|
|
}
|
|
}
|