space_t Struct Reference

Virtual address space structure. More...

#include <space.h>

Data Fields
map_t	pinnedPages
	Map of pages with a pin depth greater than 1.
page_table_t	pageTable
	The page table associated with the address space.
uintptr_t	startAddress
	The start address for allocations in this address space.
uintptr_t	endAddress
	The end address for allocations in this address space.
uintptr_t	freeAddress
	The next available free virtual address in this address space.
space_flags_t	flags
space_callback_t *	callbacks
uint64_t	callbacksLength
	Length of the callbacks array.
bitmap_t	callbackBitmap
	Bitmap to track available callback IDs.
uint64_t	bitmapBuffer [BITMAP_BITS_TO_QWORDS(PML_MAX_CALLBACK)]
list_t	cpus
	List of CPUs using this address space.
atomic_uint16_t	shootdownAcks
lock_t	lock

Detailed Description

Virtual address space structure.

The space_t structure represents a virtual address space.

Note that the actual pin depth, if its is greater than 1, is tracked in the pinnedPages map, the page table only tracks if a page is pinned or not for faster access and to avoid having to access the map even when just pinning a page once.

Definition at line 78 of file space.h.

Field Documentation

bitmapBuffer

uint64_t space_t::bitmapBuffer[BITMAP_BITS_TO_QWORDS(PML_MAX_CALLBACK)]

Buffer for the callback bitmap, see bitmap_t for more info.

Definition at line 97 of file space.h.

Referenced by space_init().

callbackBitmap

bitmap_t space_t::callbackBitmap

Bitmap to track available callback IDs.

Definition at line 93 of file space.h.

Referenced by space_alloc_callback(), space_deinit(), space_free_callback(), space_init(), and vmm_unmap().

callbacks

space_callback_t* space_t::callbacks

Array of callbacks for this address space, indexed by the callback ID.

Lazily initialized to a size equal to the largest used callback ID.

Definition at line 91 of file space.h.

Referenced by space_alloc_callback(), space_deinit(), space_init(), and vmm_unmap().

callbacksLength

uint64_t space_t::callbacksLength

Length of the callbacks array.

Definition at line 92 of file space.h.

Referenced by space_alloc_callback(), and space_init().

cpus

list_t space_t::cpus

List of CPUs using this address space.

Definition at line 98 of file space.h.

Referenced by space_deinit(), space_init(), space_load(), space_tlb_shootdown(), and vmm_cpu_ctx_init_common().

endAddress

uintptr_t space_t::endAddress

The end address for allocations in this address space.

Definition at line 83 of file space.h.

Referenced by space_check_access(), space_find_free_region(), and space_init().

flags

space_flags_t space_t::flags

Definition at line 85 of file space.h.

Referenced by space_deinit(), and space_init().

freeAddress

uintptr_t space_t::freeAddress

The next available free virtual address in this address space.

Definition at line 84 of file space.h.

Referenced by space_find_free_region(), space_init(), and space_update_free_address().

lock

lock_t space_t::lock

Definition at line 100 of file space.h.

Referenced by space_init(), space_is_mapped(), space_load(), space_mapping_end(), space_mapping_start(), space_pin(), space_pin_terminated(), space_unpin(), and vmm_cpu_ctx_init_common().

pageTable

page_table_t space_t::pageTable

The page table associated with the address space.

Definition at line 81 of file space.h.

Referenced by space_deinit(), space_find_free_region(), space_init(), space_is_mapped(), space_load(), space_map_kernel_space_region(), space_pin(), space_pin_depth_dec(), space_pin_depth_inc(), space_pin_terminated(), space_populate_user_region(), space_unmap_kernel_space_region(), vmm_alloc(), vmm_cpu_ctx_init_common(), vmm_init(), vmm_map(), vmm_map_bootloader_lower_half(), vmm_map_pages(), vmm_page_table_unmap_with_shootdown(), vmm_protect(), vmm_unmap(), and vmm_unmap_bootloader_lower_half().

pinnedPages

map_t space_t::pinnedPages

Map of pages with a pin depth greater than 1.

Definition at line 80 of file space.h.

Referenced by space_init(), space_pin_depth_dec(), and space_pin_depth_inc().

shootdownAcks

atomic_uint16_t space_t::shootdownAcks

Definition at line 99 of file space.h.

Referenced by space_init(), space_tlb_shootdown(), and vmm_shootdown_handler().

startAddress

uintptr_t space_t::startAddress

The start address for allocations in this address space.

Definition at line 82 of file space.h.

Referenced by space_check_access(), space_find_free_region(), and space_init().

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The documentation for this struct was generated from the following file:

• include/kernel/mem/space.h