page.h

struct page {
    uint8_t      is_free;
    uint8_t      order;
    struct page  *next;
};

struct page referenced types:

struct page_table {
    pte_t  entries[512];
};

struct page_table referenced types:

bool page_pfn_free(uint64_t pfn);

struct page page_for_pfn(uint64_t pfn);

page_for_pfn referenced types:

uint64_t page_get_pfn(struct page *bp);

page_get_pfn referenced types:

#define PAGE_SIZE 4096ULL

#define PAGE_2MB 0x200000

#define PAGING_PRESENT (0x1UL)

#define PAGING_WRITE (0x2UL)

#define PAGING_USER_ALLOWED (0x4UL)

#define PAGING_ALL 0xFFFUL

#define PAGING_XD (1UL << 63) // E(x)ecute (D)isable

#define PAGING_PHYS_MASK (0x00FFFFFFF000UL)

#define PAGING_PAGE_SIZE (1UL << 7)

#define PAGING_UNCACHABLE ((1UL << 4) | PAGING_WRITE)

#define PAGING_NO_FLAGS (0)

#define PAGING_WRITETHROUGH (1UL << 3)

#define PAGING_2MB_page (1ULL << 7)

#define PAGING_PAGEABLE (0)

#define PAGING_MOVABLE (0)

#define PAGING_2MB_PHYS_MASK (~((uintptr_t) PAGE_2MB - 1))

#define PAGE_ALIGN_DOWN(x) ALIGN_DOWN((uintptr_t) (x), PAGE_SIZE)

#define PAGE_ALIGN_UP(x) ALIGN_UP((uintptr_t) (x), PAGE_SIZE)

#define PAGE_TO_PFN(addr) ((addr) / PAGE_SIZE)

#define PFN_TO_PAGE(pfn) ((pfn) * PAGE_SIZE)

#define PAGES_NEEDED_FOR(bytes) (((bytes) + PAGE_SIZE - 1ULL) / PAGE_SIZE)

#define VMM_MAP_BASE 0xFFFFA00000200000

#define VMM_MAP_LIMIT 0xFFFFA00010000000

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