58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* Copyright (c) 2011, 2012, 2013, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* x86-family/idt.h
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* Initializes and handles the IDT.
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*/
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#ifndef SORTIX_X86_FAMILY_IDT_H
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#define SORTIX_X86_FAMILY_IDT_H
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#include <stdint.h>
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namespace Sortix {
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namespace IDT {
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struct idt_entry
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{
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uint16_t handler_low;
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uint16_t selector;
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uint8_t ist;
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uint8_t flags;
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uint16_t handler_high;
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#if defined(__x86_64__)
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uint32_t handler_highest;
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uint32_t reserved1;
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#endif
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};
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static const uint8_t FLAG_PRESENT = 1 << 7;
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static const uint8_t FLAG_DPL_SHIFT = 5;
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static const uint8_t FLAG_DPL_BITS = 2;
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static const uint8_t FLAG_TYPE_SHIFT = 0;
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static const uint8_t FLAG_TYPE_BITS = 4;
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static const uint8_t TYPE_INTERRUPT = 0xE;
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static const uint8_t TYPE_TRAP = 0xF;
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void Set(struct idt_entry* table, size_t length);
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void SetEntry(struct idt_entry* entry, uintptr_t handler, uint16_t selector,
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uint8_t flags, uint8_t ist);
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} // namespace IDT
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} // namespace Sortix
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#endif
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