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- #ifndef __KERN_MM_VMM_H__
- #define __KERN_MM_VMM_H__
-
- #include <defs.h>
- #include <list.h>
- #include <memlayout.h>
- #include <sync.h>
-
- //pre define
- struct mm_struct;
-
- // the virtual continuous memory area(vma), [vm_start, vm_end),
- // addr belong to a vma means vma.vm_start<= addr <vma.vm_end
- struct vma_struct {
- struct mm_struct *vm_mm; // the set of vma using the same PDT
- uintptr_t vm_start; // start addr of vma
- uintptr_t vm_end; // end addr of vma, not include the vm_end itself
- uint32_t vm_flags; // flags of vma
- list_entry_t list_link; // linear list link which sorted by start addr of vma
- };
-
- #define le2vma(le, member) \
- to_struct((le), struct vma_struct, member)
-
- #define VM_READ 0x00000001
- #define VM_WRITE 0x00000002
- #define VM_EXEC 0x00000004
-
- // the control struct for a set of vma using the same PDT
- struct mm_struct {
- list_entry_t mmap_list; // linear list link which sorted by start addr of vma
- struct vma_struct *mmap_cache; // current accessed vma, used for speed purpose
- pde_t *pgdir; // the PDT of these vma
- int map_count; // the count of these vma
- void *sm_priv; // the private data for swap manager
- };
-
- struct vma_struct *find_vma(struct mm_struct *mm, uintptr_t addr);
- struct vma_struct *vma_create(uintptr_t vm_start, uintptr_t vm_end, uint32_t vm_flags);
- void insert_vma_struct(struct mm_struct *mm, struct vma_struct *vma);
-
- struct mm_struct *mm_create(void);
- void mm_destroy(struct mm_struct *mm);
-
- void vmm_init(void);
-
- int do_pgfault(struct mm_struct *mm, uint32_t error_code, uintptr_t addr);
-
- extern volatile unsigned int pgfault_num;
- extern struct mm_struct *check_mm_struct;
- #endif /* !__KERN_MM_VMM_H__ */
-
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