alexvoste
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
#ifndef PMM_H
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#define PMM_H
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <limine.h>
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#define PAGE_SIZE 4096UL
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#define PAGE_SHIFT 12
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#define PMM_PAGE_ALIGN(x) (((x) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
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#define PMM_MAX_ORDER 10
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#define PMM_MAX_ORDER_NR (PMM_MAX_ORDER + 1)
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#define SLAB_MIN_SIZE 8
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#define SLAB_MAX_SIZE 4096
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#define SLAB_NUM_CACHES 10
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#define PMM_FREE_MIN_PHYS 0x100000ULL
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typedef struct pmm_block {
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struct pmm_block *next;
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struct pmm_block *prev;
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int order;
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} pmm_block_t;
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typedef struct {
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pmm_block_t head;
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size_t count;
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} pmm_free_list_t;
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typedef struct {
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uintptr_t hhdm_offset;
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uintptr_t mem_start;
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uintptr_t mem_end;
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size_t total_pages;
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size_t usable_pages;
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size_t free_pages;
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pmm_free_list_t orders[PMM_MAX_ORDER_NR];
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} pmm_buddy_state_t;
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typedef struct slab {
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struct slab *next;
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struct slab *prev;
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void *freelist;
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uint16_t obj_size;
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uint16_t total;
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uint16_t used;
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uint16_t _pad;
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} slab_t;
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typedef struct {
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size_t obj_size;
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slab_t *partial;
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slab_t *full;
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size_t total_allocs;
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size_t total_frees;
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} slab_cache_t;
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void pmm_init(struct limine_memmap_response *memmap,
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struct limine_hhdm_response *hhdm);
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void *pmm_alloc(size_t pages);
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void *pmm_alloc_zero(size_t pages);
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void *pmm_alloc_aligned(size_t pages, size_t alignment);
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void pmm_free(void *addr, size_t pages);
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void pmm_free_single(void *addr);
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void *pmm_phys_to_virt(uintptr_t phys);
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uintptr_t pmm_virt_to_phys(void *vaddr);
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uint64_t pmm_get_hhdm_offset(void);
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size_t pmm_get_total_pages(void);
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size_t pmm_get_usable_pages(void);
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size_t pmm_get_free_pages(void);
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size_t pmm_get_used_pages(void);
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void pmm_print_stats(void);
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void slab_init(void);
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void *kmalloc(size_t size);
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void *kzalloc(size_t size);
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void *krealloc(void *ptr, size_t new_size);
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void kfree(void *ptr);
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void slab_print_stats(void);
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extern slab_cache_t g_caches[SLAB_NUM_CACHES];
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#endif |