* arch/risc-v/src/common/addrenv.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_RISC_V_SRC_COMMON_ADDRENV_H
#define __ARCH_RISC_V_SRC_COMMON_ADDRENV_H
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include "riscv_internal.h"
#ifdef CONFIG_ARCH_ADDRENV
* Pre-processor Definitions
****************************************************************************/
#if CONFIG_ARCH_TEXT_VBASE != 0
# define ARCH_ADDRENV_VBASE (CONFIG_ARCH_TEXT_VBASE)
#else
# define ARCH_ADDRENV_VBASE (CONFIG_ARCH_DATA_VBASE)
#endif
#define ARCH_ADDRENV_MAX_SIZE (0x40000000)
#define ARCH_ADDRENV_VEND (ARCH_ADDRENV_VBASE + ARCH_ADDRENV_MAX_SIZE - 1)
* Public Function Prototypes
****************************************************************************/
* Name: riscv_get_pgtable
*
* Description:
* Get the physical address of the final level page table corresponding to
* 'vaddr'. If one does not exist, it will be allocated.
*
* Input Parameters:
* addrenv - Pointer to a structure describing the address environment
* vaddr - Virtual address to query for
*
* Returned Value:
* The physical address of the corresponding final level page table, or
* NULL if one does not exist, and there is no free memory to allocate one
*
****************************************************************************/
uintptr_t riscv_get_pgtable(arch_addrenv_t *addrenv, uintptr_t vaddr);
* Name: riscv_map_pages
*
* Description:
* Map physical pages into a continuous virtual memory block.
*
* Input Parameters:
* addrenv - Pointer to a structure describing the address environment.
* pages - A pointer to the first element in a array of physical address,
* each corresponding to one page of memory.
* npages - The number of pages in the list of physical pages to be mapped.
* vaddr - The virtual address corresponding to the beginning of the
* (continuous) virtual address region.
* prot - MMU flags to use.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned
* on failure.
*
****************************************************************************/
int riscv_map_pages(arch_addrenv_t *addrenv, uintptr_t *pages,
unsigned int npages, uintptr_t vaddr, int prot);
* Name: riscv_unmap_pages
*
* Description:
* Unmap a previously mapped virtual memory region.
*
* Input Parameters:
* addrenv - Pointer to a structure describing the address environment.
* vaddr - The virtual address corresponding to the beginning of the
* (continuous) virtual address region.
* npages - The number of pages to be unmapped
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned
* on failure.
*
****************************************************************************/
int riscv_unmap_pages(arch_addrenv_t *addrenv, uintptr_t vaddr,
unsigned int npages);
#endif
#endif