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https://github.com/reactos/reactos.git
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204 lines
4.8 KiB
C
204 lines
4.8 KiB
C
/*
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* Fast486 386/486 CPU Emulation Library
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* common.h
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*
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* Copyright (C) 2015 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef _COMMON_H_
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#define _COMMON_H_
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#pragma once
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/* DEFINES ********************************************************************/
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#define SIGN_FLAG_BYTE 0x80
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#define SIGN_FLAG_WORD 0x8000
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#define SIGN_FLAG_LONG 0x80000000
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#define REAL_MODE_FLAGS_MASK 0x57FD5
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#define PROT_MODE_FLAGS_MASK 0x50DD5
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/* Block size for string operations */
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#define STRING_BLOCK_SIZE 4096
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#define GET_SEGMENT_RPL(s) ((s) & 3u)
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#define GET_SEGMENT_INDEX(s) ((s) & 0xFFF8u)
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#define SEGMENT_TABLE_INDICATOR (1 << 2)
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#define EXCEPTION_HAS_ERROR_CODE(x) (((x) == 8) || ((x) >= 10 && (x) <= 14))
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#define NO_LOCK_PREFIX()\
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if (State->PrefixFlags & FAST486_PREFIX_LOCK)\
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{\
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Fast486Exception(State, FAST486_EXCEPTION_UD);\
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return;\
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}
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#define TOGGLE_OPSIZE(x)\
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if (State->PrefixFlags & FAST486_PREFIX_OPSIZE) x = !x;
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#define TOGGLE_ADSIZE(x)\
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if (State->PrefixFlags & FAST486_PREFIX_ADSIZE) x = !x;
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#define SWAP(x, y) { (x) ^= (y); (y) ^= (x); (x) ^= (y); }
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#define ALIGNMENT_CHECK(x, a) if (State->Flags.Ac \
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&& (State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_AM)\
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&& (State->Cpl == 3)\
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&& (((x) % (a)) != 0))\
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{\
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Fast486Exception(State, FAST486_EXCEPTION_AC);\
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return FALSE;\
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}
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#define PAGE_ALIGN(x) ((x) & 0xFFFFF000)
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#define PAGE_OFFSET(x) ((x) & 0x00000FFF)
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#define GET_ADDR_PDE(x) ((x) >> 22)
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#define GET_ADDR_PTE(x) (((x) >> 12) & 0x3FF)
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#define INVALID_TLB_FIELD 0xFFFFFFFF
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#define NUM_TLB_ENTRIES 0x100000
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typedef struct _FAST486_MOD_REG_RM
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{
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FAST486_GEN_REGS Register;
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BOOLEAN Memory;
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union
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{
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FAST486_GEN_REGS SecondRegister;
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ULONG MemoryAddress;
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};
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} FAST486_MOD_REG_RM, *PFAST486_MOD_REG_RM;
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typedef enum _FAST486_TASK_SWITCH_TYPE
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{
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FAST486_TASK_JUMP,
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FAST486_TASK_CALL,
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FAST486_TASK_RETURN
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} FAST486_TASK_SWITCH_TYPE, *PFAST486_TASK_SWITCH_TYPE;
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#include <pshpack1.h>
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typedef union _FAST486_PAGE_DIR
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{
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struct
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{
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ULONG Present : 1;
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ULONG Writeable : 1;
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ULONG Usermode : 1;
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ULONG WriteThrough : 1;
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ULONG NoCache : 1;
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ULONG Accessed : 1;
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ULONG AlwaysZero : 1;
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ULONG Size : 1;
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ULONG Unused : 4;
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ULONG TableAddress : 20;
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};
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ULONG Value;
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} FAST486_PAGE_DIR, *PFAST486_PAGE_DIR;
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C_ASSERT(sizeof(FAST486_PAGE_DIR) == sizeof(ULONG));
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typedef union _FAST486_PAGE_TABLE
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{
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struct
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{
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ULONG Present : 1;
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ULONG Writeable : 1;
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ULONG Usermode : 1;
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ULONG WriteThrough : 1;
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ULONG NoCache : 1;
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ULONG Accessed : 1;
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ULONG Dirty : 1;
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ULONG AlwaysZero : 1;
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ULONG Global : 1;
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ULONG Unused : 3;
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ULONG Address : 20;
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};
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ULONG Value;
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} FAST486_PAGE_TABLE, *PFAST486_PAGE_TABLE;
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C_ASSERT(sizeof(FAST486_PAGE_DIR) == sizeof(ULONG));
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#include <poppack.h>
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/* FUNCTIONS ******************************************************************/
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BOOLEAN
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FASTCALL
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Fast486ReadMemory
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(
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PFAST486_STATE State,
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FAST486_SEG_REGS SegmentReg,
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ULONG Offset,
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BOOLEAN InstFetch,
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PVOID Buffer,
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ULONG Size
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);
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BOOLEAN
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FASTCALL
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Fast486WriteMemory
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(
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PFAST486_STATE State,
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FAST486_SEG_REGS SegmentReg,
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ULONG Offset,
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PVOID Buffer,
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ULONG Size
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);
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BOOLEAN
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FASTCALL
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Fast486PerformInterrupt
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(
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PFAST486_STATE State,
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UCHAR Number
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);
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VOID
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FASTCALL
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Fast486ExceptionWithErrorCode
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(
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PFAST486_STATE State,
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FAST486_EXCEPTIONS ExceptionCode,
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ULONG ErrorCode
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);
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BOOLEAN
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FASTCALL
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Fast486TaskSwitch
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(
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PFAST486_STATE State,
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FAST486_TASK_SWITCH_TYPE Type,
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USHORT Selector
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);
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BOOLEAN
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FASTCALL
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Fast486CallGate
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(
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PFAST486_STATE State,
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PFAST486_CALL_GATE Gate,
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BOOLEAN Call
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);
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/* INLINED FUNCTIONS **********************************************************/
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#include "common.inl"
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#endif // _COMMON_H_
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/* EOF */
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