Curle
d522d40ac8
Have somehow fixed the drawing routines along the way. I also tried to implement a better keyboard handler, but that's quite a ways away right now.
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <kernel/system/interrupts.h>
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#define PAGE_SIZE 4096
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#define PAGES_PER_BUCKET 8
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#define OFFSET_BIT(i) Memory[i / PAGES_PER_BUCKET]
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#define SET_BIT(i) OFFSET_BIT(i) = OFFSET_BIT(i) | (1 << (i % PAGES_PER_BUCKET))
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#define UNSET_BIT(i) OFFSET_BIT(i) = OFFSET_BIT(i) & (~(1 << (i % PAGES_PER_BUCKET)))
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#define READ_BIT(i) ((OFFSET_BIT(i) >> (i % PAGES_PER_BUCKET)) & 0x1)
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#define GET_BUCKET32(i) (*((uint32_t*) (&Memory[i / 32])))
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#define IS_ALIGNED(addr) (((size_t) addr | 0xFFFFFFFFFFFFF000) == 0)
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#define PAGE_ALIGN(addr) ((((size_t) addr) & 0xFFFFFFFFFFFFF000) + 0x1000)
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#define SET_PGBIT(cr0) (cr0 = cr0 | 1 << 31)
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#define UNSET_PGBIT(cr0) (cr0 = cr0 ^ 1 << 31)
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#define UNSET_PSEBIT(cr4) (cr4 = cr4 & 0xFFFFFFEF)
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#define TOGGLE_PGEBIT(cr4) (cr4 = cr4 ^ (1 << 7))
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#define SET_PAEBIT(cr4) (cr4 = cr4 | 1 << 5)
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#define ERR_PRESENT 0x1
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#define ERR_RW 0x2
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#define ERR_USER 0x4
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#define ERR_RESERVED 0x8
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#define ERR_INST 0x10
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extern size_t end;
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void ListMemoryMap();
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void InitMemoryManager();
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size_t AllocateFrame();
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void FreeFrame(size_t FrameNumber);
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size_t SeekFrame();
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void MemoryTest();
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void InitPaging();
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void PageFaultHandler(INTERRUPT_FRAME frame); |