:: limine / common / mm / pmm.h 2.5 KB raw

#ifndef MM__PMM_H__

#define MM__PMM_H__

​

#include <stdint.h>

#include <stddef.h>

#include <stdbool.h>

​

struct memmap_entry {

    uint64_t base;

    uint64_t length;

    uint32_t type;

    uint32_t unused;

};

​

#define MEMMAP_USABLE                 1

#define MEMMAP_RESERVED               2

#define MEMMAP_ACPI_RECLAIMABLE       3

#define MEMMAP_ACPI_NVS               4

#define MEMMAP_BAD_MEMORY             5

#define MEMMAP_BOOTLOADER_RECLAIMABLE 0x1000

#define MEMMAP_KERNEL_AND_MODULES     0x1001

#define MEMMAP_FRAMEBUFFER            0x1002

#define MEMMAP_RESERVED_MAPPED        0x1003

#define MEMMAP_EFI_RECLAIMABLE        0x2000

​

struct meminfo {

    size_t uppermem;

    size_t lowermem;

};

​

struct meminfo mmap_get_info(size_t mmap_count, struct memmap_entry *mmap);

​

#if defined (BIOS)

extern struct memmap_entry memmap[];

extern size_t memmap_entries;

#endif

​

#if defined (UEFI)

extern struct memmap_entry *memmap;

extern size_t memmap_entries;

​

extern struct memmap_entry *untouched_memmap;

extern size_t untouched_memmap_entries;

#endif

​

extern bool allocations_disallowed;

​

void init_memmap(void);

struct memmap_entry *get_memmap(size_t *entries);

struct memmap_entry *get_raw_memmap(size_t *entry_count);

void print_memmap(struct memmap_entry *mm, size_t size);

uint64_t pmm_check_type(uint64_t addr);

bool memmap_alloc_range_in(struct memmap_entry *m, size_t *_count,

                           uint64_t base, uint64_t length, uint32_t type, uint32_t overlay_type, bool do_panic, bool simulation, bool new_entry);

bool memmap_alloc_range(uint64_t base, uint64_t length, uint32_t type, uint32_t overlay_type, bool panic, bool simulation, bool new_entry);

void pmm_randomise_memory(void);

​

void *ext_mem_alloc_size_t(size_t count);

void *ext_mem_alloc(uint64_t count);

void *ext_mem_alloc_counted(uint64_t count, uint64_t elem_size);

void *ext_mem_alloc_type(uint64_t count, uint32_t type);

void *ext_mem_alloc_type_aligned(uint64_t count, uint32_t type, size_t alignment);

void *ext_mem_alloc_type_aligned_mode(uint64_t count, uint32_t type, size_t alignment, bool allow_high_allocs);

​

void *conv_mem_alloc(uint64_t count);

​

void pmm_free_size_t(void *ptr, size_t length);

void pmm_free(void *ptr, uint64_t length);

void *pmm_realloc(void *old_ptr, uint64_t old_size, uint64_t new_size);

​

#if defined (UEFI)

void pmm_release_uefi_mem(void);

#endif

​

bool check_usable_memory(uint64_t base, uint64_t top);

void pmm_sanitise_entries(struct memmap_entry *m, size_t *_count, bool align_entries);

​

extern bool pmm_sanitiser_keep_first_page;

​

#endif