63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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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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