240 lines
6.6 KiB
C
240 lines
6.6 KiB
C
/*
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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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* 2022-11-14 WangXiaoyao the first version
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*/
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#ifndef __MM_ASPACE_H__
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#define __MM_ASPACE_H__
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#include <rthw.h>
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#include <rtthread.h>
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#include <stddef.h>
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#include "avl_adpt.h"
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#include "mm_fault.h"
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#include "mm_flag.h"
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#define MM_PAGE_SHIFT 12
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#define MM_PA_TO_OFF(pa) ((uintptr_t)(pa) >> MM_PAGE_SHIFT)
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#define PV_OFFSET (rt_kmem_pvoff())
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#ifndef RT_USING_SMP
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typedef rt_spinlock_t mm_spinlock;
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#define MM_PGTBL_LOCK_INIT(aspace)
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#define MM_PGTBL_LOCK(aspace) (rt_hw_spin_lock(&((aspace)->pgtbl_lock)))
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#define MM_PGTBL_UNLOCK(aspace) (rt_hw_spin_unlock(&((aspace)->pgtbl_lock)))
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#else
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typedef struct rt_spinlock mm_spinlock;
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#define MM_PGTBL_LOCK_INIT(aspace) (rt_spin_lock_init(&((aspace)->pgtbl_lock)))
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#define MM_PGTBL_LOCK(aspace) (rt_spin_lock(&((aspace)->pgtbl_lock)))
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#define MM_PGTBL_UNLOCK(aspace) (rt_spin_unlock(&((aspace)->pgtbl_lock)))
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#endif /* RT_USING_SMP */
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struct rt_aspace;
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struct rt_varea;
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struct rt_mem_obj;
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extern struct rt_aspace rt_kernel_space;
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typedef struct rt_aspace
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{
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void *start;
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rt_size_t size;
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void *page_table;
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mm_spinlock pgtbl_lock;
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struct _aspace_tree tree;
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struct rt_mutex bst_lock;
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rt_uint64_t asid;
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} *rt_aspace_t;
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typedef struct rt_varea
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{
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void *start;
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rt_size_t size;
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rt_size_t offset;
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rt_size_t attr;
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rt_size_t flag;
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struct rt_aspace *aspace;
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struct rt_mem_obj *mem_obj;
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struct _aspace_node node;
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struct rt_page *frames;
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void *data;
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} *rt_varea_t;
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typedef struct rt_mm_va_hint
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{
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void *limit_start;
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rt_size_t limit_range_size;
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void *prefer;
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const rt_size_t map_size;
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mm_flag_t flags;
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} *rt_mm_va_hint_t;
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typedef struct rt_mem_obj
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{
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void (*hint_free)(rt_mm_va_hint_t hint);
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void (*on_page_fault)(struct rt_varea *varea, struct rt_aspace_fault_msg *msg);
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/* do pre open bushiness like inc a ref */
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void (*on_varea_open)(struct rt_varea *varea);
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/* do post close bushiness like def a ref */
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void (*on_varea_close)(struct rt_varea *varea);
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void (*on_page_offload)(struct rt_varea *varea, void *vaddr, rt_size_t size);
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const char *(*get_name)(rt_varea_t varea);
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} *rt_mem_obj_t;
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extern struct rt_mem_obj rt_mm_dummy_mapper;
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enum rt_mmu_cntl
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{
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MMU_CNTL_NONCACHE,
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MMU_CNTL_CACHE,
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MMU_CNTL_READONLY,
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MMU_CNTL_READWRITE,
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MMU_CNTL_DUMMY_END,
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};
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/**
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* @brief Lock to access page table of address space
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*/
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#define WR_LOCK(aspace) \
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rt_thread_self() ? rt_mutex_take(&(aspace)->bst_lock, RT_WAITING_FOREVER) \
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: 0
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#define WR_UNLOCK(aspace) \
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rt_thread_self() ? rt_mutex_release(&(aspace)->bst_lock) : 0
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#define RD_LOCK(aspace) WR_LOCK(aspace)
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#define RD_UNLOCK(aspace) WR_UNLOCK(aspace)
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rt_aspace_t rt_aspace_create(void *start, rt_size_t length, void *pgtbl);
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rt_err_t rt_aspace_init(rt_aspace_t aspace, void *start, rt_size_t length, void *pgtbl);
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void rt_aspace_delete(rt_aspace_t aspace);
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void rt_aspace_detach(rt_aspace_t aspace);
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/**
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* @brief Memory Map on Virtual Address Space to Mappable Object
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* *INFO There is no restriction to use NULL address(physical/virtual).
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* Vaddr passing in addr must be page aligned. If vaddr is RT_NULL,
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* a suitable address will be chose automatically.
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*
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* @param aspace target virtual address space
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* @param addr virtual address of the mapping
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* @param length length of mapping region
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* @param attr MMU attribution
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* @param flags desired memory protection and behaviour of the mapping
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* @param mem_obj memory map backing store object
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* @param offset offset of mapping in 4KB page for mem_obj
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* @return int E_OK on success, with addr set to vaddr of mapping
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* E_INVAL
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*/
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int rt_aspace_map(rt_aspace_t aspace, void **addr, rt_size_t length, rt_size_t attr,
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mm_flag_t flags, rt_mem_obj_t mem_obj, rt_size_t offset);
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/** no malloc routines call */
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int rt_aspace_map_static(rt_aspace_t aspace, rt_varea_t varea, void **addr,
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rt_size_t length, rt_size_t attr, mm_flag_t flags,
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rt_mem_obj_t mem_obj, rt_size_t offset);
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/**
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* @brief Memory Map on Virtual Address Space to Physical Memory
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*
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* @param aspace target virtual address space
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* @param hint hint of mapping va
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* @param attr MMU attribution
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* @param pa_off (physical address >> 12)
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* @param ret_va pointer to the location to store va
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* @return int E_OK on success, with ret_va set to vaddr of mapping
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* E_INVAL
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*/
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int rt_aspace_map_phy(rt_aspace_t aspace, rt_mm_va_hint_t hint, rt_size_t attr,
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rt_size_t pa_off, void **ret_va);
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/** no malloc routines call */
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int rt_aspace_map_phy_static(rt_aspace_t aspace, rt_varea_t varea,
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rt_mm_va_hint_t hint, rt_size_t attr, rt_size_t pa_off,
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void **ret_va);
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/**
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* @brief Remove any mappings overlap the range [addr, addr + bytes)
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*
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* @param aspace
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* @param addr
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* @return int
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*/
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int rt_aspace_unmap(rt_aspace_t aspace, void *addr);
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int rt_aspace_control(rt_aspace_t aspace, void *addr, enum rt_mmu_cntl cmd);
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int rt_aspace_load_page(rt_aspace_t aspace, void *addr, rt_size_t npage);
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int rt_aspace_offload_page(rt_aspace_t aspace, void *addr, rt_size_t npage);
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int rt_aspace_traversal(rt_aspace_t aspace,
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int (*fn)(rt_varea_t varea, void *arg), void *arg);
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void rt_aspace_print_all(rt_aspace_t aspace);
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/**
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* @brief Map one page to varea
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*
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* @param varea target varea
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* @param addr user address
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* @param page the page frame to be mapped
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* @return int
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*/
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int rt_varea_map_page(rt_varea_t varea, void *vaddr, void *page);
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/**
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* @brief Map a range of physical address to varea
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*
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* @param varea target varea
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* @param vaddr user address
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* @param paddr physical address
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* @param length map range
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* @return int
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*/
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int rt_varea_map_range(rt_varea_t varea, void *vaddr, void *paddr, rt_size_t length);
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/**
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* @brief Insert page to page manager of varea
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* The page will be freed by varea on uninstall automatically
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*
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* @param varea target varea
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* @param page_addr the page frame to be added
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*/
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void rt_varea_pgmgr_insert(rt_varea_t varea, void *page_addr);
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rt_ubase_t rt_kmem_pvoff(void);
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void rt_kmem_pvoff_set(rt_ubase_t pvoff);
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int rt_kmem_map_phy(void *va, void *pa, rt_size_t length, rt_size_t attr);
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void *rt_kmem_v2p(void *vaddr);
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void rt_kmem_list(void);
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#endif /* __MM_ASPACE_H__ */
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