1 /* 2 * Copyright (c) 2017-2018, 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 10 #include <lib/utils.h> 11 12 #include "psci_private.h" 13 14 u_register_t psci_mem_protect(unsigned int enable) 15 { 16 int val; 17 18 assert(psci_plat_pm_ops->read_mem_protect != NULL); 19 assert(psci_plat_pm_ops->write_mem_protect != NULL); 20 21 if (psci_plat_pm_ops->read_mem_protect(&val) < 0) { 22 return (u_register_t) PSCI_E_NOT_SUPPORTED; 23 } 24 if (psci_plat_pm_ops->write_mem_protect(enable) < 0) { 25 return (u_register_t) PSCI_E_NOT_SUPPORTED; 26 } 27 28 return (val != 0) ? 1U : 0U; 29 } 30 31 u_register_t psci_mem_chk_range(uintptr_t base, u_register_t length) 32 { 33 int ret; 34 35 assert(psci_plat_pm_ops->mem_protect_chk != NULL); 36 37 if ((length == 0U) || check_uptr_overflow(base, length - 1U)) { 38 return (u_register_t) PSCI_E_DENIED; 39 } 40 41 ret = psci_plat_pm_ops->mem_protect_chk(base, length); 42 return (ret < 0) ? 43 (u_register_t) PSCI_E_DENIED : (u_register_t) PSCI_E_SUCCESS; 44 } 45