Page

include/mem/page.h

struct page

Member Type	Member Name
uint8_t	phys_usable
uint8_t	is_free
uint8_t	order
struct page	*next
struct spinlock	lock

struct page_table

Member Type	Member Name
pte_t	entries[512]

• static inline bool page_pfn_free(uint64_t pfn)
• static inlinestruct page *page_for_pfn(uint64_t pfn)
• static inline uint64_t page_get_pfn(struct page *bp)
• static inline bool page_pfn_phys_usable(uint64_t pfn)

Defines

• PAGE_SIZE: 4096ULL
• PAGE_2MB: 0x200000
• PAGING_PRESENT: (0x1UL)
• PAGING_WRITE: (0x2UL)
• PAGING_USER_ALLOWED: (0x4UL)
• PAGING_ALL: 0xFFFUL
• PAGING_XD: (1UL << 63) // E(x)ecute (D)isable
• PAGING_PHYS_MASK: (0x00FFFFFFF000UL)
• PAGING_PAGE_SIZE: (1UL << 7)
• PAGING_UNCACHABLE: ((1UL << 4) | PAGING_WRITE)
• PAGING_NO_FLAGS: (0)
• PAGING_WRITETHROUGH: (1UL << 3)
• PAGING_2MB_page: (1ULL << 7)
• PAGING_PAGEABLE: (0)
• PAGING_MOVABLE: (0)
• PAGING_2MB_PHYS_MASK: (~((uintptr_t) PAGE_2MB - 1))
• VMM_MAP_BASE: 0xFFFFA00000200000
• VMM_MAP_LIMIT: 0xFFFFA00010000000

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