pmm.c File Reference

#include <kernel/mem/pmm.h>
#include <kernel/config.h>
#include <kernel/log/log.h>
#include <kernel/log/panic.h>
#include <kernel/mem/pmm_bitmap.h>
#include <kernel/mem/pmm_stack.h>
#include <kernel/sync/lock.h>
#include <boot/boot_info.h>
#include <errno.h>
#include <sys/math.h>
#include <sys/proc.h>

Go to the source code of this file.

Macros
#define	PMM_BITMAP_SIZE   (CONFIG_PMM_BITMAP_MAX_ADDR / PAGE_SIZE)

Functions
static bool	pmm_is_efi_mem_available (EFI_MEMORY_TYPE type)
static void	pmm_free_unlocked (void *address)
static void	pmm_free_pages_unlocked (void *address, uint64_t count)
static void	pmm_detect_memory (const boot_memory_map_t *map)
static void	pmm_load_memory (const boot_memory_map_t *map)
void	pmm_init (const boot_memory_map_t *map)
	Initializes the Physical Memory Manager.
void *	pmm_alloc (void)
	Allocates a single physical page.
uint64_t	pmm_alloc_pages (void **addresses, uint64_t count)
	Allocates multiple physical pages.
void *	pmm_alloc_bitmap (uint64_t count, uintptr_t maxAddr, uint64_t alignment)
	Allocates a contiguous region of physical pages managed by the bitmap.
void	pmm_free (void *address)
	Frees a single physical page.
void	pmm_free_pages (void **addresses, uint64_t count)
	Frees multiple physical pages.
void	pmm_free_region (void *address, uint64_t count)
	Frees a contiguous region of physical pages.
uint64_t	pmm_total_amount (void)
	Retrieves the total amount of physical memory managed by the PMM.
uint64_t	pmm_free_amount (void)
	Retrieves the amount of free physical memory.
uint64_t	pmm_reserved_amount (void)
	Retrieves the amount of reserved physical memory.

Variables
static const char *	efiMemTypeToString []
static pmm_stack_t	stack
static pmm_bitmap_t	bitmap
static uint64_t	mapBuffer [BITMAP_BITS_TO_QWORDS(PMM_BITMAP_SIZE)]
static uint64_t	pageAmount = 0
static lock_t	lock = LOCK_CREATE

Macro Definition Documentation

PMM_BITMAP_SIZE

#define PMM_BITMAP_SIZE   (CONFIG_PMM_BITMAP_MAX_ADDR / PAGE_SIZE)

Definition at line 34 of file pmm.c.

Function Documentation

pmm_detect_memory()

static void pmm_detect_memory ( const boot_memory_map_t *  map )

static

Definition at line 113 of file pmm.c.

References boot_is_mem_ram(), BOOT_MEMORY_MAP_GET_DESCRIPTOR, boot_memory_map_t::length, LOG_INFO, map, and pageAmount.

Referenced by pmm_init().

pmm_free_pages_unlocked()

static void pmm_free_pages_unlocked ( void *  address, uint64_t  count  )

static

Definition at line 82 of file pmm.c.

References address, bitmap, CONFIG_PMM_BITMAP_MAX_ADDR, count, PAGE_SIZE, PML_HIGHER_TO_LOWER, PML_LOWER_TO_HIGHER, pmm_bitmap_free(), pmm_stack_free(), ROUND_DOWN, and stack.

Referenced by pmm_free_region(), and pmm_load_memory().

pmm_free_unlocked()

static void pmm_free_unlocked ( void *  address )

static

Definition at line 66 of file pmm.c.

References address, bitmap, CONFIG_PMM_BITMAP_MAX_ADDR, NULL, panic(), PML_LOWER_TO_HIGHER, pmm_bitmap_free(), pmm_stack_free(), and stack.

Referenced by pmm_free(), and pmm_free_pages().

pmm_is_efi_mem_available()

static bool pmm_is_efi_mem_available ( EFI_MEMORY_TYPE  type )

static

Definition at line 46 of file pmm.c.

References boot_is_mem_ram().

Referenced by pmm_load_memory().

pmm_load_memory()

static void pmm_load_memory ( const boot_memory_map_t *  map )

static

Definition at line 130 of file pmm.c.

References BOOT_MEMORY_MAP_GET_DESCRIPTOR, efiMemTypeToString, boot_memory_map_t::length, LOG_INFO, map, PAGE_SIZE, pageAmount, pmm_free_amount(), pmm_free_pages_unlocked(), and pmm_is_efi_mem_available().

Referenced by pmm_init().

Variable Documentation

bitmap

pmm_bitmap_t bitmap

static

Definition at line 37 of file pmm.c.

Referenced by pmm_alloc_bitmap(), pmm_bitmap_alloc(), pmm_bitmap_free(), pmm_bitmap_init(), pmm_free_amount(), pmm_free_pages_unlocked(), pmm_free_unlocked(), pmm_init(), and pmm_reserved_amount().

efiMemTypeToString

const char* efiMemTypeToString[]

static

Initial value:

= {
    "reserved",
    "loader code",
    "loader data",
    "boot services code",
    "boot services data",
    "runtime services code",
    "runtime services data",
    "conventional",
    "unusable",
    "acpi reclaim",
    "acpi memory nvs",
    "io",
    "io port space",
    "pal code",
    "persistent",
}

Definition at line 16 of file pmm.c.

Referenced by pmm_load_memory().

lock

lock_t lock = LOCK_CREATE

static

Definition at line 44 of file pmm.c.

Referenced by pmm_alloc(), pmm_alloc_bitmap(), pmm_alloc_pages(), pmm_free(), pmm_free_amount(), pmm_free_pages(), pmm_free_region(), pmm_reserved_amount(), and pmm_total_amount().

mapBuffer

uint64_t mapBuffer[BITMAP_BITS_TO_QWORDS(PMM_BITMAP_SIZE)]

static

Definition at line 40 of file pmm.c.

Referenced by pmm_init().

pageAmount

uint64_t pageAmount = 0

static

Definition at line 42 of file pmm.c.

Referenced by _heap_alloc(), _heap_block_new(), page_table_clear(), page_table_collect_callbacks(), page_table_find_unmapped_region(), page_table_is_mapped(), page_table_is_pinned(), page_table_is_unmapped(), page_table_map(), page_table_map_pages(), page_table_set_flags(), page_table_unmap(), pmm_detect_memory(), pmm_load_memory(), pmm_reserved_amount(), pmm_total_amount(), shmem_mmap(), shmem_object_allocate_pages(), space_alloc_callback(), space_find_free_region(), space_mapping_start(), space_pin(), space_pin_depth_dec(), space_pin_depth_inc(), space_pmm_bitmap_alloc_pages(), space_populate_user_region(), space_tlb_shootdown(), space_unpin(), space_update_free_address(), vmm_map_pages(), and vmm_page_table_unmap_with_shootdown().

stack

pmm_stack_t stack

static

Definition at line 36 of file pmm.c.

Referenced by pmm_alloc(), pmm_alloc_pages(), pmm_free_amount(), pmm_free_pages_unlocked(), pmm_free_unlocked(), pmm_init(), pmm_reserved_amount(), pmm_stack_alloc(), pmm_stack_free(), pmm_stack_init(), qsort(), stack_pointer_deinit(), stack_pointer_deinit_buffer(), stack_pointer_init(), stack_pointer_init_buffer(), stack_pointer_is_in_stack(), stack_pointer_overlaps_guard(), and tss_ist_load().