1 /*
2  * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <assert.h>
8 #include <limits.h>
9 #include <utils.h>
10 #include "psci_private.h"
11 
psci_mem_protect(unsigned int enable)12 int psci_mem_protect(unsigned int enable)
13 {
14 	int val;
15 
16 	assert(psci_plat_pm_ops->read_mem_protect);
17 	assert(psci_plat_pm_ops->write_mem_protect);
18 
19 	if (psci_plat_pm_ops->read_mem_protect(&val) < 0)
20 		return PSCI_E_NOT_SUPPORTED;
21 	if (psci_plat_pm_ops->write_mem_protect(enable) < 0)
22 		return PSCI_E_NOT_SUPPORTED;
23 
24 	return val != 0;
25 }
26 
psci_mem_chk_range(uintptr_t base,u_register_t length)27 int psci_mem_chk_range(uintptr_t base, u_register_t length)
28 {
29 	int ret;
30 
31 	assert(psci_plat_pm_ops->mem_protect_chk);
32 
33 	if (length == 0 || check_uptr_overflow(base, length-1))
34 		return PSCI_E_DENIED;
35 
36 	ret = psci_plat_pm_ops->mem_protect_chk(base, length);
37 	return (ret < 0) ? PSCI_E_DENIED : PSCI_E_SUCCESS;
38 }
39