1d4c596beSRoberto Vargas /* 2*8c20c3c9SAntonio Nino Diaz * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. 3d4c596beSRoberto Vargas * 4d4c596beSRoberto Vargas * SPDX-License-Identifier: BSD-3-Clause 5d4c596beSRoberto Vargas */ 6d4c596beSRoberto Vargas 7d4c596beSRoberto Vargas #include <assert.h> 8d4c596beSRoberto Vargas #include <limits.h> 9d4c596beSRoberto Vargas #include <utils.h> 10d4c596beSRoberto Vargas #include "psci_private.h" 11d4c596beSRoberto Vargas 12*8c20c3c9SAntonio Nino Diaz u_register_t psci_mem_protect(unsigned int enable) 13d4c596beSRoberto Vargas { 14d4c596beSRoberto Vargas int val; 15d4c596beSRoberto Vargas 16*8c20c3c9SAntonio Nino Diaz assert(psci_plat_pm_ops->read_mem_protect != NULL); 17*8c20c3c9SAntonio Nino Diaz assert(psci_plat_pm_ops->write_mem_protect != NULL); 18d4c596beSRoberto Vargas 19d4c596beSRoberto Vargas if (psci_plat_pm_ops->read_mem_protect(&val) < 0) 20*8c20c3c9SAntonio Nino Diaz return (u_register_t) PSCI_E_NOT_SUPPORTED; 21d4c596beSRoberto Vargas if (psci_plat_pm_ops->write_mem_protect(enable) < 0) 22*8c20c3c9SAntonio Nino Diaz return (u_register_t) PSCI_E_NOT_SUPPORTED; 23d4c596beSRoberto Vargas 24*8c20c3c9SAntonio Nino Diaz return (val != 0) ? 1U : 0U; 25d4c596beSRoberto Vargas } 26d4c596beSRoberto Vargas 27*8c20c3c9SAntonio Nino Diaz u_register_t psci_mem_chk_range(uintptr_t base, u_register_t length) 28d4c596beSRoberto Vargas { 29d4c596beSRoberto Vargas int ret; 30d4c596beSRoberto Vargas 31*8c20c3c9SAntonio Nino Diaz assert(psci_plat_pm_ops->mem_protect_chk != NULL); 32d4c596beSRoberto Vargas 33*8c20c3c9SAntonio Nino Diaz if ((length == 0U) || check_uptr_overflow(base, length - 1U)) 34*8c20c3c9SAntonio Nino Diaz return (u_register_t) PSCI_E_DENIED; 35d4c596beSRoberto Vargas 36d4c596beSRoberto Vargas ret = psci_plat_pm_ops->mem_protect_chk(base, length); 37*8c20c3c9SAntonio Nino Diaz return (ret < 0) ? 38*8c20c3c9SAntonio Nino Diaz (u_register_t) PSCI_E_DENIED : (u_register_t) PSCI_E_SUCCESS; 39d4c596beSRoberto Vargas } 40