77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
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* Copyright (c) 2020 Institute of Parallel And Distributed Systems (IPADS), Shanghai Jiao Tong University (SJTU)
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* OS-Lab-2020 (i.e., ChCore) is licensed under the Mulan PSL v1.
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* You can use this software according to the terms and conditions of the Mulan PSL v1.
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* You may obtain a copy of Mulan PSL v1 at:
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* http://license.coscl.org.cn/MulanPSL
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
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* PURPOSE.
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* See the Mulan PSL v1 for more details.
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*/
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#pragma once
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#include <common/list.h>
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#include <common/mmu.h>
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#include <common/radix.h>
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struct file_cap {
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};
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struct vmregion {
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struct list_head node; // vmr_list
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vaddr_t start;
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size_t size;
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vmr_prop_t perm;
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struct pmobject *pmo;
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};
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struct vmspace {
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/* list of vmregion */
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struct list_head vmr_list;
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/* root page table */
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vaddr_t *pgtbl;
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struct vmregion *heap_vmr;
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vaddr_t user_current_heap;
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};
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typedef u64 pmo_type_t;
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#define PMO_ANONYM 0 /* lazy allocation */
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#define PMO_DATA 1 /* immediate allocation */
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#define PMO_FILE 2 /* file backed */
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#define PMO_SHM 3 /* shared memory */
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#define PMO_USER_PAGER 4 /* support user pager */
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#define PMO_DEVICE 5 /* memory mapped device registers */
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struct pmobject {
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struct radix *radix; /* record physical pages */
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paddr_t start;
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size_t size;
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pmo_type_t type;
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atomic_cnt refcnt;
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// if type == PMO_BACKED
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struct file_cap *file;
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off_t offset;
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};
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int vmspace_init(struct vmspace *vmspace);
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void pmo_init(struct pmobject *pmo, pmo_type_t type, size_t len, paddr_t paddr);
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int vmspace_map_range(struct vmspace *vmspace, vaddr_t va, size_t len,
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vmr_prop_t flags, struct pmobject *pmo);
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int vmspace_unmap_range(struct vmspace *vmspace, vaddr_t va, size_t len);
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struct vmregion *find_vmr_for_va(struct vmspace *vmspace, vaddr_t addr);
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void switch_vmspace_to(struct vmspace *);
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void commit_page_to_pmo(struct pmobject *pmo, u64 index, paddr_t pa);
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paddr_t get_page_from_pmo(struct pmobject *pmo, u64 index);
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struct vmregion *init_heap_vmr(struct vmspace *vmspace, vaddr_t va,
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struct pmobject *pmo);
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