51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
#ifndef KMM_H
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#define KMM_H
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#include <stdint.h>
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#define PAGE_PRESENT (1 << 0)
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#define PAGE_WRITABLE (1 << 1)
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#define PAGE_USER (1 << 2)
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#define PAGE_COW (1 << 9)
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#define PAGE_MMIO (1 << 10)
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#define TEMP_KERNPD_VADDR 0xDFF90000
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#define TEMP_TASKPD_VADDR 0xDFFA0000
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#define TEMP_PT_SRC 0xDFFB0000
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#define TEMP_PT_DST 0xDFFC0000
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#define PAGE_SIZE 4096
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#define MAX_RAM 0xFFFFFFFF // 4GB
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#define BITMAP_SIZE ((MAX_RAM / PAGE_SIZE) / 8)
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#define CUR_PAGE_DIRECTORY 0xFFFFF000
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#define CUR_PAGE_TABLES 0xFFC00000
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typedef struct __attribute__((packed)) {
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uint32_t addr;
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} mem_page_t;
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void init_pmm(void* mmap_base, uint32_t mmap_limit);
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void init_page_tables();
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void* p_alloc_frame();
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uint32_t total_free_memory();
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void* create_new_pd();
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void* clone_current_pd();
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void clear_current_pd();
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int is_cow(uint32_t vaddr);
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void map_page(uint32_t vaddr, uint32_t paddr, uint32_t flags);
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void unmap_page(uint32_t vaddr);
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void load_pd(void* paddr);
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void flush_tlb();
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void disable_pae();
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#endif
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