arch/arm_addrenv_pgmap.c: Add minimal page map implementation for ARM

This commit is contained in:
Ville Juven 2024-02-01 14:59:35 +02:00 committed by Xiang Xiao
parent 15f19c32ac
commit 8e4b2e8a2a
3 changed files with 84 additions and 2 deletions

View File

@ -74,8 +74,14 @@ else()
endif()
if(CONFIG_ARCH_ADDRENV)
list(APPEND SRCS arm_addrenv.c arm_addrenv_utils.c arm_addrenv_perms.c
arm_pgalloc.c)
list(
APPEND
SRCS
arm_addrenv.c
arm_addrenv_utils.c
arm_addrenv_perms.c
arm_pgalloc.c
arm_addrenv_pgmap.c)
if(CONFIG_ARCH_STACK_DYNAMIC)
list(APPEND SRCS arm_addrenv_ustack.c)
endif()

View File

@ -65,6 +65,7 @@ endif
ifeq ($(CONFIG_ARCH_ADDRENV),y)
CMN_CSRCS += arm_addrenv.c arm_addrenv_utils.c arm_addrenv_perms.c arm_pgalloc.c
CMN_CSRCS += arm_addrenv_pgmap.c
ifeq ($(CONFIG_ARCH_STACK_DYNAMIC),y)
CMN_CSRCS += arm_addrenv_ustack.c
endif

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@ -0,0 +1,75 @@
/****************************************************************************
* arch/arm/src/armv7-a/arm_addrenv_pgmap.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <nuttx/compiler.h>
#include <nuttx/pgalloc.h>
#include "pgalloc.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_addrenv_page_vaddr
*
* Description:
* Find the kernel virtual address associated with physical page.
*
* Input Parameters:
* page - The page physical address.
*
* Returned Value:
* Page kernel virtual address on success; NULL on failure.
*
****************************************************************************/
uintptr_t up_addrenv_page_vaddr(uintptr_t page)
{
return arm_pgvaddr(page);
}
/****************************************************************************
* Name: up_addrenv_page_wipe
*
* Description:
* Wipe a page of physical memory, first mapping it into kernel virtual
* memory.
*
* Input Parameters:
* page - The page physical address.
*
* Returned Value:
* None.
*
****************************************************************************/
void up_addrenv_page_wipe(uintptr_t page)
{
uintptr_t vaddr = arm_pgvaddr(page);
memset((void *)vaddr, 0, MM_PGSIZE);
}