Mapping and unmapping a map entry's range in an address space, and the kernel's own address space (kvm_space). More...

#include <core/system.h>
#include <core/arch.h>
#include <core/panic.h>
#include <mm/mm.h>
#include <mm/vm.h>
#include <ds/queue.h>
#include <ds/hashmap.h>

Functions
int	vm_map (struct vm_space vm_space, struct vm_entry vm_entry)
	Maps a map entry's whole range at once: its physical memory (paddr), or new pages of memory if it has none.
void	vm_unmap_full (struct vm_space vm_space, struct vm_entry vm_entry)
	Unmaps every page of a map entry's range.

Variables
struct vm_space	kvm_space

Detailed Description

Mapping and unmapping a map entry's range in an address space, and the kernel's own address space (kvm_space).

Definition in file vmm.c.

Function Documentation

◆ vm_map()

int vm_map	(	struct vm_space *	vm_space,
		struct vm_entry *	vm_entry )

Maps a map entry's whole range at once: its physical memory (paddr), or new pages of memory if it has none.

Entries whose pages come in on page faults aren't mapped this way.

Parameters

vm_space	the address space
vm_entry	the entry

Returns: 0, or -ENOMEM if there was no memory for a page or a page table

Definition at line 29 of file vmm.c.

References vm_entry::base, vm_entry::flags, mm_map(), vm_entry::paddr, vm_space::pmap, vm_entry::size, and vm_map().

Referenced by acpi_map(), earlycon_fb_init(), fbdev_vesa_map(), fbdev_vesa_prope(), and vm_map().

◆ vm_unmap_full()

void vm_unmap_full	(	struct vm_space *	vm_space,
		struct vm_entry *	vm_entry )

Unmaps every page of a map entry's range.

The pages themselves stay with what holds them (the anon, the file, the device): only the mappings go.

Parameters

vm_space	the address space
vm_entry	the entry

Definition at line 42 of file vmm.c.

References vm_entry::base, mm_unmap_full(), vm_space::pmap, vm_entry::size, and vm_unmap_full().

Referenced by sys_munmap(), and vm_unmap_full().

Variable Documentation

◆ kvm_space

struct vm_space kvm_space

Definition at line 17 of file vmm.c.

Referenced by acpi_map(), earlycon_fb_init(), fbdev_vesa_prope(), kproc_init(), kvmem_alloc(), kvmem_selftest_run(), kvmem_unmap(), pmap_init(), proc_kill(), request_do(), slab_page_alloc(), slab_page_free(), tables_build(), tlb_shootdown(), and x86_ap_start().