Memory Descriptor

include/mem/mm.h View source View on GitHub

Structs

mm_context

struct mm_context {
    size_t           ctx_id;
    _Atomic size_t   tlb_gen;
    struct cpu_mask  cpus;
};

mm

struct mm {
    struct vas     *vas;
    struct rbit    vma_range_tree;
    struct rwlock  lock;
    paddr_t        pml4;
    vaddr_t        mmap_cursor;
    refcount_t     users;
    refcount_t     refcount;
};

Enums

mm_map_flags

enum mm_map_flags {
    MM_MAP_FIXED = 1 << 0,
    MM_MAP_ANON = 1 << 1,
};

mm_fault_flags

enum mm_fault_flags {
    MM_FAULT_WRITE = 1 << 0,
    MM_FAULT_USER = 1 << 1,
    MM_FAULT_INSN = 1 << 2,
};

mm_fault_result

enum mm_fault_result {
    MM_FAULT_OK,
    MM_FAULT_RETRY,
    MM_FAULT_SIGSEGV,
    MM_FAULT_OOM,
};

Functions

mm_alloc

struct mm * mm_alloc(void);

mm_free

void mm_free(struct mm *mm);

mm_fork

struct mm * mm_fork(struct mm *src);

mm_exit

void mm_exit(struct mm *mm);

mm_vma_range_insert

void mm_vma_range_insert(struct mm *mm, struct vma_range *vma_range);

mm_vma_range_remove

void mm_vma_range_remove(struct mm *mm, struct vma_range *vma_range);

mm_vma_range_find

struct vma_range * mm_vma_range_find(struct mm *mm, vaddr_t addr);

mm_vma_range_find_intersection

struct vma_range * mm_vma_range_find_intersection(struct mm *mm, vaddr_t s, vaddr_t e);

mm_vma_range_find_gap

vaddr_t mm_vma_range_find_gap(struct mm *mm, size_t len, size_t align, vaddr_t low, vaddr_t high);

mm_map

vaddr_t mm_map(struct mm *mm, vaddr_t hint, size_t len, enum vma_range_protection prot, enum mm_map_flags flags);

mm_unmap

enum errno mm_unmap(struct mm *mm, vaddr_t start, size_t len);

mm_protect

enum errno mm_protect(struct mm *mm, vaddr_t start, size_t len, enum vma_range_protection prot);

mm_pgtable_init

enum errno mm_pgtable_init(struct mm *mm);

mm_pgtable_free

void mm_pgtable_free(struct mm *mm);

mm_activate

void mm_activate(struct mm *mm);

mm_map_page

enum errno mm_map_page(struct mm *mm, vaddr_t va, paddr_t pa, uint64_t pflags);

mm_unmap_page

void mm_unmap_page(struct mm *mm, vaddr_t va);

mm_query

paddr_t mm_query(struct mm *mm, vaddr_t va, uint64_t *pflags_out);

mm_fault

enum mm_fault_result mm_fault(struct mm *mm, vaddr_t addr, enum mm_fault_flags flags);

mm_do_anon_fault

enum mm_fault_result mm_do_anon_fault(struct vma_range *vma_range, vaddr_t addr, enum mm_fault_flags);

mm_do_cow_fault

enum mm_fault_result mm_do_cow_fault(struct vma_range *vma_range, vaddr_t addr, enum mm_fault_flags);

mm_get

bool mm_get(struct mm *mm);

mm_put

void mm_put(struct mm *mm);

mm_users_inc

bool mm_users_inc(struct mm *mm);

mm_users_put

void mm_users_put(struct mm *mm);