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