67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
#pragma once
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#define KERNEL_OFFSET 0xFFFFFF8000000000
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#define KERNEL_HEAP_S 0xFFFFFFC000000000
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#ifdef __ASSEMBLER__
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#define V2P(a) ((a) - KERNEL_OFFSET)
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#define P2V(a) ((a) + KERNEL_OFFSET)
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#define PAGE_OFFSET(p) ((p) & 0xFFF)
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#define P1_OFFSET(p) (((p) >> 12) & 0x1FF)
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#define P2_OFFSET(p) (((p) >> 21) & 0x1FF)
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#define P3_OFFSET(p) (((p) >> 30) & 0x1FF)
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#define P4_OFFSET(p) (((p) >> 39) & 0x1FF)
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#else
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#include <stdint.h>
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#define V2P(a) ((uintptr_t)(a) - KERNEL_OFFSET)
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#define P2V(a) ((void *)((uintptr_t)(a) + KERNEL_OFFSET))
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// returns an address n bytes after the target of pointer p
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#define incptr(p, n) ((void *)(((uintptr_t)(p)) + (n)))
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#define PAGE_OFFSET(p) (((uintptr_t)(p)) & 0xFFF)
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#define P1_OFFSET(p) ((((uintptr_t)(p)) >> 12) & 0x1FF)
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#define P2_OFFSET(p) ((((uintptr_t)(p)) >> 21) & 0x1FF)
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#define P3_OFFSET(p) ((((uintptr_t)(p)) >> 30) & 0x1FF)
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#define P4_OFFSET(p) ((((uintptr_t)(p)) >> 39) & 0x1FF)
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#endif
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#define PAGE_SIZE 0x1000
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#define PAGE_FLAGS_MASK 0xFFF
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// Paging
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#define PAGE_PRESENT 0x001
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#define PAGE_WRITE 0x002
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#define PAGE_USER 0x004
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#define PAGE_WRITETHROUGH 0x008
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#define PAGE_NOCACHE 0x010
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#define PAGE_ACCESSED 0x020
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#define PAGE_DIRTY 0x040
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#define PAGE_HUGE 0x080
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#define PAGE_GLOBAL 0x100
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#ifndef __ASSEMBLER__
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#include <stddef.h>
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typedef void * page_table;
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extern page_table BootP4;
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extern int kernel_start, kernel_end;
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void pmm_init();
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uintptr_t pmm_alloc();
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void pmm_free(uintptr_t page);
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#define GET_P4() ((page_table)V2P(&BootP4))
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void vmm_init();
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page_table *vmm_new_P4();
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void vmm_set_P4(page_table *P4);
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void vmm_free_P4(page_table *P4);
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uintptr_t vmm_get_page(page_table *P4, uintptr_t addr);
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uintptr_t vmm_set_page(page_table *P4, uintptr_t addr, uintptr_t phys, uint32_t flags);
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void kfree(void *a);
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void *kmalloc(size_t size);
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void *kcalloc(size_t count, size_t size);
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void *krealloc(void *ptr, size_t size);
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void heap_print();
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#endif
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