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 psci_mem_protect(unsigned int enable)14u_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 if (psci_plat_pm_ops->write_mem_protect(enable) < 0) 24 return (u_register_t) PSCI_E_NOT_SUPPORTED; 25 26 return (val != 0) ? 1U : 0U; 27 } 28 psci_mem_chk_range(uintptr_t base,u_register_t length)29u_register_t psci_mem_chk_range(uintptr_t base, u_register_t length) 30 { 31 int ret; 32 33 assert(psci_plat_pm_ops->mem_protect_chk != NULL); 34 35 if ((length == 0U) || check_uptr_overflow(base, length - 1U)) 36 return (u_register_t) PSCI_E_DENIED; 37 38 ret = psci_plat_pm_ops->mem_protect_chk(base, length); 39 return (ret < 0) ? 40 (u_register_t) PSCI_E_DENIED : (u_register_t) PSCI_E_SUCCESS; 41 } 42