49 lines
No EOL
1.1 KiB
C
49 lines
No EOL
1.1 KiB
C
#include "idt.h"
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#include <stdint.h>
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#include <util/binary.h>
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typedef struct
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{
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uint16_t BaseLow;
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uint16_t SegmentSelector;
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uint8_t Reserved;
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uint8_t Flags;
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uint16_t BaseHigh;
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} __attribute__((packed)) IDTEntry;
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typedef struct
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{
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uint16_t Limit;
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IDTEntry* Ptr;
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} __attribute__((packed)) IDTDescriptor;
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IDTEntry g_IDT[256];
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IDTDescriptor g_IDTDescriptor = { sizeof(g_IDT) - 1, g_IDT };
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void __attribute__((cdecl)) i686_IDT_Load(IDTDescriptor* idtDescriptor);
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void i686_IDT_SetGate(int interrupt, void* base, uint16_t segmentDescriptor, uint8_t flags)
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{
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g_IDT[interrupt].BaseLow = ((uint32_t)base) & 0xFFFF;
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g_IDT[interrupt].SegmentSelector = segmentDescriptor;
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g_IDT[interrupt].Reserved = 0;
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g_IDT[interrupt].Flags = flags;
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g_IDT[interrupt].BaseHigh = ((uint32_t)base >> 16) & 0xFFFF;
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}
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void i686_IDT_EnableGate(int interrupt)
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{
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FLAG_SET(g_IDT[interrupt].Flags, IDT_FLAG_PRESENT);
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}
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void i686_IDT_DisableGate(int interrupt)
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{
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FLAG_UNSET(g_IDT[interrupt].Flags, IDT_FLAG_PRESENT);
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}
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void i686_IDT_Initialize()
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{
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i686_IDT_Load(&g_IDTDescriptor);
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} |