60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2006-2022, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2022-12-06 WangXiaoyao the first version
|
|
*/
|
|
#ifndef __MM_FAULT_H__
|
|
#define __MM_FAULT_H__
|
|
|
|
#include <rtthread.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/* fast path fault handler, a page frame on kernel space is returned */
|
|
#define MM_FAULT_STATUS_OK 0
|
|
/* customized fault handler, done by using rt_varea_map_* */
|
|
#define MM_FAULT_STATUS_OK_MAPPED 1
|
|
#define MM_FAULT_STATUS_UNRECOVERABLE 4
|
|
|
|
struct rt_mm_fault_res
|
|
{
|
|
void *vaddr;
|
|
rt_size_t size;
|
|
int status;
|
|
};
|
|
|
|
enum rt_mm_fault_op
|
|
{
|
|
MM_FAULT_OP_READ = 1,
|
|
MM_FAULT_OP_WRITE,
|
|
MM_FAULT_OP_EXECUTE,
|
|
};
|
|
|
|
enum rt_mm_fault_type
|
|
{
|
|
MM_FAULT_TYPE_ACCESS_FAULT,
|
|
MM_FAULT_TYPE_PAGE_FAULT,
|
|
MM_FAULT_TYPE_BUS_ERROR,
|
|
MM_FAULT_TYPE_GENERIC,
|
|
};
|
|
|
|
struct rt_aspace_fault_msg
|
|
{
|
|
enum rt_mm_fault_op fault_op;
|
|
enum rt_mm_fault_type fault_type;
|
|
rt_size_t off;
|
|
void *fault_vaddr;
|
|
|
|
struct rt_mm_fault_res response;
|
|
};
|
|
|
|
struct rt_aspace;
|
|
/* MMU base page fault handler, return 1 is fixable */
|
|
int rt_aspace_fault_try_fix(struct rt_aspace *aspace, struct rt_aspace_fault_msg *msg);
|
|
|
|
#endif /* __MM_FAULT_H__ */
|