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68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/*******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011, 2012.
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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.cpp
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Initializes and handles the IDT.
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*******************************************************************************/
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#include "../platform.h"
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#include <libmaxsi/memory.h>
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#include "idt.h"
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using namespace Maxsi;
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namespace Sortix
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{
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namespace IDT
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{
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extern "C" void idt_flush(addr_t);
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idt_entry_t idt_entries[256];
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idt_ptr_t idt_ptr;
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void Init()
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{
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idt_ptr.limit = sizeof(idt_entry_t) * 256 - 1;
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idt_ptr.base = (addr_t) &idt_entries;
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Memory::Set(&idt_entries, 0, sizeof(idt_entry_t)*256);
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}
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void Flush()
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{
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idt_flush((addr_t) &idt_ptr);
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}
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void SetGate(uint8_t num, addr_t base, uint16_t sel, uint8_t flags)
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{
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idt_entries[num].base_low = base & 0xFFFF;
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idt_entries[num].base_high = (base >> 16) & 0xFFFF;
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#ifdef PLATFORM_X64
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idt_entries[num].base_highest = (base >> 32 ) & 0xFFFFFFFFU;
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idt_entries[num].zero1 = 0;
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#endif
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idt_entries[num].sel = sel;
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idt_entries[num].always0 = 0;
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idt_entries[num].flags = flags;
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}
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}
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}
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