Page

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

Structs

page

struct page (1 field) source

§ uint64_t meta

page_table

struct page_table (1 field) source

§ pte_t entries[512]

Enums

page_tag

enum page_tag (4 variants) source

Low 3 bits

§ PAGE_TAG_NONE = 0

§ PAGE_TAG_BUDDY = 1

§ PAGE_TAG_FOLIO = 2

§ PAGE_TAG_ARENA = 3

cached as a free single page in a domain arena

Functions

page_get_tag

enum page_tag page_get_tag(const struct page *p)

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page_set_tag

void page_set_tag(struct page *p, enum page_tag tag)

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page_get_payload

uint64_t page_get_payload(const struct page *p)

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page_set_payload

void page_set_payload(struct page *p, uint64_t payload)

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page_assert_tag

void page_assert_tag(const struct page *p, enum page_tag expected)

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page_for_pfn

struct page * page_for_pfn(pfn_t pfn)

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page_for_paddr

struct page * page_for_paddr(paddr_t paddr)

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page_get_pfn

pfn_t page_get_pfn(const struct page *bp)

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page_get_paddr

paddr_t page_get_paddr(const struct page *bp)

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page_get_vaddr

vaddr_t page_get_vaddr(const struct page *bp)

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Macros

PAGE_SIZE

#define PAGE_SIZE KIB(4)

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PAGE_2MB

#define PAGE_2MB MIB(2)

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PAGE_1GB

#define PAGE_1GB GIB(1)

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PAGE_PRESENT_SHIFT

#define PAGE_PRESENT_SHIFT (0)

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PAGE_PRESENT

#define PAGE_PRESENT (0x1UL)

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PAGE_WRITE

#define PAGE_WRITE (0x2UL)

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PAGE_USER_ALLOWED

#define PAGE_USER_ALLOWED (0x4UL)

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PAGE_XD

#define PAGE_XD BIT(63)

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E(x)ecute (D)isable

PAGE_PHYS_MASK

#define PAGE_PHYS_MASK (0x00FFFFFFF000UL)

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PAGE_UNCACHABLE

#define PAGE_UNCACHABLE BIT(4)

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PCD

PAGE_NO_FLAGS

#define PAGE_NO_FLAGS (0)

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PAGE_WRITETHROUGH

#define PAGE_WRITETHROUGH BIT(3)

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PAGE_HUGE

#define PAGE_HUGE BIT(7)

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PS: 2MB at the PD level, 1GB at the PDPT

PAGE_PAGEABLE

#define PAGE_PAGEABLE (0)

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TODO

PAGE_MOVABLE

#define PAGE_MOVABLE (0)

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PAGE_2MB_PHYS_MASK

#define PAGE_2MB_PHYS_MASK (0x00FFFFE00000UL)

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PAGE_1GB_PHYS_MASK

#define PAGE_1GB_PHYS_MASK (0x00FFC0000000UL)

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PAGE_ALIGN_DOWN

#define PAGE_ALIGN_DOWN(x)

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Expansion

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

PAGE_ALIGN_UP

#define PAGE_ALIGN_UP(x)

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Expansion

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

PAGE_ALIGN_UP_WRAPPING

#define PAGE_ALIGN_UP_WRAPPING(x)

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Expansion

#define PAGE_ALIGN_UP_WRAPPING(x) ALIGN_UP_WRAPPING((uintptr_t) (x), PAGE_SIZE)

IS_PAGE_ALIGNED

#define IS_PAGE_ALIGNED(x)

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Expansion

#define IS_PAGE_ALIGNED(x) IS_ALIGNED((uintptr_t) (x), PAGE_SIZE)

PAGE_2MB_ALIGN_DOWN

#define PAGE_2MB_ALIGN_DOWN(x)

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Expansion

#define PAGE_2MB_ALIGN_DOWN(x) ALIGN_DOWN((uintptr_t) (x), PAGE_2MB)

PAGE_2MB_ALIGN_UP

#define PAGE_2MB_ALIGN_UP(x)

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Expansion

#define PAGE_2MB_ALIGN_UP(x) ALIGN_UP((uintptr_t) (x), PAGE_2MB)

PAGE_1GB_ALIGN_DOWN

#define PAGE_1GB_ALIGN_DOWN(x)

source

Expansion

#define PAGE_1GB_ALIGN_DOWN(x) ALIGN_DOWN((uintptr_t) (x), PAGE_1GB)

PAGE_1GB_ALIGN_UP

#define PAGE_1GB_ALIGN_UP(x)

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Expansion

#define PAGE_1GB_ALIGN_UP(x) ALIGN_UP((uintptr_t) (x), PAGE_1GB)

PAGE_TO_PFN

#define PAGE_TO_PFN(addr)

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Expansion

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

PFN_TO_PAGE

#define PFN_TO_PAGE(pfn)

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Expansion

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

PAGES_NEEDED_FOR

#define PAGES_NEEDED_FOR(bytes)

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Expansion

#define PAGES_NEEDED_FOR(bytes) DIV_ROUND_UP((bytes), PAGE_SIZE)

VMM_MAP_BASE

#define VMM_MAP_BASE 0xFFFFA00000200000

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VMM_MAP_LIMIT

#define VMM_MAP_LIMIT 0xFFFFA00010000000

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PT_ENTRIES

#define PT_ENTRIES 512

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PT_INDEX_MASK

#define PT_INDEX_MASK 0x1FFULL

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PAGE_4K_SHIFT

#define PAGE_4K_SHIFT 12

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PAGE_2M_SHIFT

#define PAGE_2M_SHIFT 21

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PAGE_1G_SHIFT

#define PAGE_1G_SHIFT 30

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PAGE_TAG_MASK

#define PAGE_TAG_MASK 0x7ULL

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PAGE_PAYLOAD_ALIGNMENT

#define PAGE_PAYLOAD_ALIGNMENT 8

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