Karina
22 lines
706 B
C
22 lines
706 B
C
#ifndef PMM_H
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#define PMM_H
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#include "../common/bootinfo.h"
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#define PAGE_SIZE 4096
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#define BLOCKS_PER_BYTE 8
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#define SAFE_SPACE_START_ADDR 0x100000
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#define BITMAP_BYTE_INDEX(addr) ((addr / PAGE_SIZE) / BLOCKS_PER_BYTE)
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#define BITMAP_BIT_OFFSET(addr) ((addr / PAGE_SIZE) % BLOCKS_PER_BYTE)
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#define BITMAP_TEST(bitmap, addr) (bitmap[BITMAP_BYTE_INDEX(addr)] & (1 << BITMAP_BIT_OFFSET(addr)))
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#define BITMAP_SET(bitmap, addr) (bitmap[BITMAP_BYTE_INDEX(addr)] |= (1 << BITMAP_BIT_OFFSET(addr)))
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#define BITMAP_UNSET(bitmap, addr) (bitmap[BITMAP_BYTE_INDEX(addr)] &= ~(1 << BITMAP_BIT_OFFSET(addr)))
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void pmm_init(BI_MemoryMap mmap);
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void* pmm_alloc_page();
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void pmm_free_page(void* addr);
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#endif |