Luchian Mihai
c2f9368c7e
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77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/****************************************************************************
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* arch/arm/src/armv7-a/arm_addrenv_pgmap.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/arch.h>
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#include <nuttx/compiler.h>
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#include <nuttx/pgalloc.h>
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#include "pgalloc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_addrenv_page_vaddr
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*
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* Description:
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* Find the kernel virtual address associated with physical page.
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*
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* Input Parameters:
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* page - The page physical address.
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*
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* Returned Value:
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* Page kernel virtual address on success; NULL on failure.
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*
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****************************************************************************/
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uintptr_t up_addrenv_page_vaddr(uintptr_t page)
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{
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return arm_pgvaddr(page);
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}
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/****************************************************************************
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* Name: up_addrenv_page_wipe
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*
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* Description:
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* Wipe a page of physical memory, first mapping it into kernel virtual
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* memory.
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*
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* Input Parameters:
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* page - The page physical address.
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void up_addrenv_page_wipe(uintptr_t page)
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{
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uintptr_t vaddr = arm_pgvaddr(page);
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memset((void *)vaddr, 0, MM_PGSIZE);
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}
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