songyanguang
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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/**
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* @file pagetable_attr.c
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* @brief mmu entry attributes
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* @version 1.
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* @author AIIT XUOS Lab
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* @date 2023.04.26
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*/
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/*************************************************
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File name: pagetable_attr.c
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Description: mmu entry attributes
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Others:
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History:
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Author: AIIT XUOS Lab
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Modification:
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1. first version
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*************************************************/
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#include "mmu.h"
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#include "mmu_common.h"
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// clang-format off
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#define ARMV8_PTE_ATTR_MASK(attr) (((attr) & 0b111) << 2)
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#define ARMV8_PTE_DEVICE ARMV8_PTE_ATTR_MASK(0x0)
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#define ARMV8_PTE_NORMAL ARMV8_PTE_ATTR_MASK(0x1)
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#define ARMV8_PTE_AP(ap) (((ap) & 0b11) << 6)
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#define ARMV8_PTE_AP_U ARMV8_PTE_AP(0x01)
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#define ARMV8_PTE_AP_K ARMV8_PTE_AP(0x00)
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#define ARMV8_PTE_AP_RO ARMV8_PTE_AP(0b10)
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#define ARMV8_PTE_AP_RW ARMV8_PTE_AP(0b00)
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#define ARMV8_PTE_AF (0x1 << 10)
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#define ARMV8_PTE_PXN (1ULL << 53) // Privileged eXecute Never
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#define ARMV8_PTE_UXN (1ULL << 54) // Unprivileged(user) eXecute Never
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#define ARMV8_PTE_XN (ARMV8_PTE_PXN | ARMV8_PTE_UXN)
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#define ARMV8_PTE_VALID (0b11 << 0)
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#define ARMV8_PDE_VALID (0b11 << 0)
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// clang-format on
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void GetUsrPteAttr(uintptr_t* attr)
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{
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// *attr = ARMV8_PTE_AP_U | ARMV8_PTE_AP_RW | ARMV8_PTE_AF | ARMV8_PTE_NORMAL | ARMV8_PTE_VALID;
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*attr = 0x713 | ARMV8_PTE_AP_U;
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}
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void GetUsrDevPteAttr(uintptr_t* attr)
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{
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// *attr = ARMV8_PTE_AP_U | ARMV8_PTE_AP_RW | ARMV8_PTE_AF | ARMV8_PTE_DEVICE | ARMV8_PTE_XN | ARMV8_PTE_VALID;
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*attr = 0x403 | ARMV8_PTE_AP_U;
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}
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void GetDevPteAttr(uintptr_t* attr)
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{
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// *attr = ARMV8_PTE_AP_K | ARMV8_PTE_AP_RW | ARMV8_PTE_AF | ARMV8_PTE_DEVICE | ARMV8_PTE_XN | ARMV8_PTE_VALID;
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*attr = 0x403ULL;
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}
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void GetKernPteAttr(uintptr_t* attr)
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{
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// *attr = ARMV8_PTE_AP_K | ARMV8_PTE_AP_RW | ARMV8_PTE_AF | ARMV8_PTE_NORMAL | ARMV8_PTE_VALID;
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*attr = 0x713ULL;
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}
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void GetPdeAttr(uintptr_t* attr)
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{
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*attr = ARMV8_PDE_VALID;
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} |