1d4c596beSRoberto Vargas /* 24c700c15SGovindraj Raja * 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> 909d40e0eSAntonio Nino Diaz 1009d40e0eSAntonio Nino Diaz #include <lib/utils.h> 1109d40e0eSAntonio Nino Diaz 12d4c596beSRoberto Vargas #include "psci_private.h" 13d4c596beSRoberto Vargas 148c20c3c9SAntonio Nino Diaz u_register_t psci_mem_protect(unsigned int enable) 15d4c596beSRoberto Vargas { 16*a9eb44d4SSigned-off-by: Maheedhar Bollapalli int val = 0; 17d4c596beSRoberto Vargas 188c20c3c9SAntonio Nino Diaz assert(psci_plat_pm_ops->read_mem_protect != NULL); 198c20c3c9SAntonio Nino Diaz assert(psci_plat_pm_ops->write_mem_protect != NULL); 20d4c596beSRoberto Vargas 21f3d9e22aSPrasad Kummari if (psci_plat_pm_ops->read_mem_protect(&val) < 0) { 228c20c3c9SAntonio Nino Diaz return (u_register_t) PSCI_E_NOT_SUPPORTED; 23f3d9e22aSPrasad Kummari } 24f3d9e22aSPrasad Kummari if (psci_plat_pm_ops->write_mem_protect(enable) < 0) { 258c20c3c9SAntonio Nino Diaz return (u_register_t) PSCI_E_NOT_SUPPORTED; 26f3d9e22aSPrasad Kummari } 27d4c596beSRoberto Vargas 288c20c3c9SAntonio Nino Diaz return (val != 0) ? 1U : 0U; 29d4c596beSRoberto Vargas } 30d4c596beSRoberto Vargas 318c20c3c9SAntonio Nino Diaz u_register_t psci_mem_chk_range(uintptr_t base, u_register_t length) 32d4c596beSRoberto Vargas { 33d4c596beSRoberto Vargas int ret; 34d4c596beSRoberto Vargas 358c20c3c9SAntonio Nino Diaz assert(psci_plat_pm_ops->mem_protect_chk != NULL); 36d4c596beSRoberto Vargas 37f3d9e22aSPrasad Kummari if ((length == 0U) || check_uptr_overflow(base, length - 1U)) { 388c20c3c9SAntonio Nino Diaz return (u_register_t) PSCI_E_DENIED; 39f3d9e22aSPrasad Kummari } 40d4c596beSRoberto Vargas 41d4c596beSRoberto Vargas ret = psci_plat_pm_ops->mem_protect_chk(base, length); 428c20c3c9SAntonio Nino Diaz return (ret < 0) ? 438c20c3c9SAntonio Nino Diaz (u_register_t) PSCI_E_DENIED : (u_register_t) PSCI_E_SUCCESS; 44d4c596beSRoberto Vargas } 45