1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2017-2018, Arm Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #include <assert.h> 8*91f16700Schasinglulu #include <limits.h> 9*91f16700Schasinglulu 10*91f16700Schasinglulu #include <lib/utils.h> 11*91f16700Schasinglulu 12*91f16700Schasinglulu #include "psci_private.h" 13*91f16700Schasinglulu 14*91f16700Schasinglulu u_register_t psci_mem_protect(unsigned int enable) 15*91f16700Schasinglulu { 16*91f16700Schasinglulu int val; 17*91f16700Schasinglulu 18*91f16700Schasinglulu assert(psci_plat_pm_ops->read_mem_protect != NULL); 19*91f16700Schasinglulu assert(psci_plat_pm_ops->write_mem_protect != NULL); 20*91f16700Schasinglulu 21*91f16700Schasinglulu if (psci_plat_pm_ops->read_mem_protect(&val) < 0) 22*91f16700Schasinglulu return (u_register_t) PSCI_E_NOT_SUPPORTED; 23*91f16700Schasinglulu if (psci_plat_pm_ops->write_mem_protect(enable) < 0) 24*91f16700Schasinglulu return (u_register_t) PSCI_E_NOT_SUPPORTED; 25*91f16700Schasinglulu 26*91f16700Schasinglulu return (val != 0) ? 1U : 0U; 27*91f16700Schasinglulu } 28*91f16700Schasinglulu 29*91f16700Schasinglulu u_register_t psci_mem_chk_range(uintptr_t base, u_register_t length) 30*91f16700Schasinglulu { 31*91f16700Schasinglulu int ret; 32*91f16700Schasinglulu 33*91f16700Schasinglulu assert(psci_plat_pm_ops->mem_protect_chk != NULL); 34*91f16700Schasinglulu 35*91f16700Schasinglulu if ((length == 0U) || check_uptr_overflow(base, length - 1U)) 36*91f16700Schasinglulu return (u_register_t) PSCI_E_DENIED; 37*91f16700Schasinglulu 38*91f16700Schasinglulu ret = psci_plat_pm_ops->mem_protect_chk(base, length); 39*91f16700Schasinglulu return (ret < 0) ? 40*91f16700Schasinglulu (u_register_t) PSCI_E_DENIED : (u_register_t) PSCI_E_SUCCESS; 41*91f16700Schasinglulu } 42