mm

Documentation

Index

• Constants
• func Alloc() uintptr
• func Fixmap(va, pa, size uintptr)
• func Init()
• func Mmap(va, size uintptr) uintptr
• func Munmap(va, size uintptr) bool
• func PoolInit(p *Pool, size uintptr)
• func Sbrk(n uintptr) uintptr
• func SysFixedMmap(vaddr, paddr, size uintptr)
• func SysMmap(vaddr, size uintptr) uintptr
• type Pool
  • func (p *Pool) Alloc() uintptr
  • func (p *Pool) Free(ptr uintptr)

Constants

const (
	PGSIZE = 4 << 10
	// 1-100 Mb memory reverse for kernel image
	MEMSTART = 100 << 20
	// 默认可以使用的物理内存终止地址，如果能从grub那里获取就用grub的
	DEFAULT_MEMTOP = 256 << 20
	// 虚拟内存起始地址
	VMSTART = 1 << 30

	PTE_P = 0x001
	PTE_W = 0x002
	PTE_U = 0x004
)

Functions

func Alloc

func Alloc() uintptr

func Fixmap

func Fixmap(va, pa, size uintptr)

func Init

func Init()

func Mmap

func Mmap(va, size uintptr) uintptr

func Munmap

func Munmap(va, size uintptr) bool

func PoolInit

func PoolInit(p *Pool, size uintptr)

size will align ptr size

func Sbrk

func Sbrk(n uintptr) uintptr

func SysFixedMmap

func SysFixedMmap(vaddr, paddr, size uintptr)

SysFixedMmap map the same physical address to the virtual address run in user mode

func SysMmap

func SysMmap(vaddr, size uintptr) uintptr

SysMmap like Mmap but can run in user mode wraper of syscall.Mmap

Types

type Pool

type Pool struct {
	// contains filtered or unexported fields
}

Pool used to manage fixed size memory block

func (*Pool) Alloc

func (p *Pool) Alloc() uintptr

func (*Pool) Free

func (p *Pool) Free(ptr uintptr)