blob: 875ad9c2a5477df39643c417bdd2702d646cb780 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
/*
* Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdbool.h>
#include <arch.h>
#include <arch_features.h>
#include <arch_helpers.h>
#include <lib/extensions/mpam.h>
void mpam_enable(cpu_context_t *context)
{
u_register_t mpam3_el3;
mpam3_el3 = read_ctx_reg(get_el3state_ctx(context), CTX_MPAM3_EL3);
/*
* Enable MPAM, and disable trapping to EL3 when lower ELs access their
* own MPAM registers
*/
mpam3_el3 = (mpam3_el3 | MPAM3_EL3_MPAMEN_BIT) &
~(MPAM3_EL3_TRAPLOWER_BIT);
write_ctx_reg(get_el3state_ctx(context), CTX_MPAM3_EL3, mpam3_el3);
}
/*
* If EL2 is implemented but unused, disable trapping to EL2 when lower ELs
* access their own MPAM registers.
*/
void mpam_init_el2_unused(void)
{
write_mpam2_el2(0ULL);
if ((read_mpamidr_el1() & MPAMIDR_HAS_HCR_BIT) != 0U) {
write_mpamhcr_el2(0ULL);
}
}
|
