* arch/x86_64/src/common/pgalloc.h
*
* 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.
*
****************************************************************************/
#ifndef __ARCH_X86_64_SRC_COMMON_PGALLOC_H
#define __ARCH_X86_64_SRC_COMMON_PGALLOC_H
#ifdef CONFIG_MM_PGALLOC
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <string.h>
#include <nuttx/addrenv.h>
#include "addrenv.h"
* Pre-processor Definitions
****************************************************************************/
* Public Function Prototypes
****************************************************************************/
* Name: x86_64_pgvaddr
*
* Description:
* Get virtual address for pgpool physical address. Note: this function
* is minimalistic and is only usable for kernel mappings and only tests
* if the paddr is in the pgpool. For user mapped addresses this does not
* work.
*
* Input Parameters:
* paddr - Physical pgpool address
*
* Return:
* vaddr - Virtual address for physical address
*
****************************************************************************/
static inline uintptr_t x86_64_pgvaddr(uintptr_t paddr)
{
#ifdef CONFIG_ARCH_PGPOOL_MAPPING
if (paddr >= CONFIG_ARCH_PGPOOL_PBASE && paddr < CONFIG_ARCH_PGPOOL_PEND)
{
return CONFIG_ARCH_PGPOOL_VBASE + paddr - CONFIG_ARCH_PGPOOL_PBASE;
}
else
#endif
if (paddr >= CONFIG_RAM_START && paddr < CONFIG_RAM_END && paddr != 0)
{
return X86_64_LOAD_OFFSET + paddr - CONFIG_RAM_START;
}
return 0;
}
static inline uintptr_t x86_64_pgpaddr(uintptr_t vaddr)
{
#ifdef CONFIG_ARCH_PGPOOL_MAPPING
if (vaddr >= CONFIG_ARCH_PGPOOL_VBASE && vaddr < CONFIG_ARCH_PGPOOL_VEND)
{
return CONFIG_ARCH_PGPOOL_PBASE + vaddr - CONFIG_ARCH_PGPOOL_VBASE;
}
else
#endif
if (vaddr >= X86_64_LOAD_OFFSET && vaddr < X86_64_LOAD_OFFSET)
{
return CONFIG_RAM_START + vaddr - X86_64_LOAD_OFFSET;
}
return 0;
}
* Name: x86_64_uservaddr
*
* Description:
* Return true if the virtual address, vaddr, lies in the user address
* space.
*
****************************************************************************/
static inline bool x86_64_uservaddr(uintptr_t vaddr)
{
* heap, or stack regions.
*/
#ifdef CONFIG_ARCH_ADDRENV
if (vaddr >= ARCH_ADDRENV_VBASE && vaddr < ARCH_ADDRENV_VEND)
{
return true;
}
#endif
#ifdef CONFIG_ARCH_VMA_MAPPING
if (vaddr >= CONFIG_ARCH_SHM_VBASE && vaddr < ARCH_SHM_VEND)
{
return true;
}
#endif
return false;
}
* Name: x86_64_pgwipe
*
* Description:
* Wipe a page of physical memory, first mapping it into virtual memory.
*
* Input Parameters:
* paddr - Physical address of page
*
****************************************************************************/
static inline void x86_64_pgwipe(uintptr_t paddr)
{
uintptr_t vaddr = x86_64_pgvaddr(paddr);
memset((void *)vaddr, 0, MM_PGSIZE);
}
#endif
#endif