blob: 49b6bd8d9e80f6ff12005cd2c21d36198de7808a (
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
42
43
44
45
|
/*
* Copyright (c) 2022, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdbool.h>
#include <arch_helpers.h>
#include <debug.h>
#include <sync.h>
static exception_handler_t custom_sync_exception_handler;
void register_custom_sync_exception_handler(exception_handler_t handler)
{
custom_sync_exception_handler = handler;
}
void unregister_custom_sync_exception_handler(void)
{
custom_sync_exception_handler = NULL;
}
bool tftf_sync_exception_handler(void)
{
uint64_t elr_elx = IS_IN_EL2() ? read_elr_el2() : read_elr_el1();
bool resume = false;
if (custom_sync_exception_handler == NULL) {
return false;
}
resume = custom_sync_exception_handler();
if (resume) {
/* Move ELR to next instruction to allow tftf to continue */
if (IS_IN_EL2()) {
write_elr_el2(elr_elx + 4U);
} else {
write_elr_el1(elr_elx + 4U);
}
}
return resume;
}
|
