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78e8653765
Halfplement the IRET instruction (everything except task switching). svn path=/branches/ntvdm/; revision=60392
142 lines
3.1 KiB
C
142 lines
3.1 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: 386/486 CPU Emulation Library
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* FILE: common.h
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* PURPOSE: Common functions used internally by Soft386 (header file).
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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#ifndef _COMMON_H_
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#define _COMMON_H_
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/* DEFINES ********************************************************************/
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#ifndef FASTCALL
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#define FASTCALL __fastcall
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#endif
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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 0x17FD5
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#define PROT_MODE_FLAGS_MASK 0x10DD5
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#define GET_SEGMENT_RPL(s) ((s) & 3)
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#define GET_SEGMENT_INDEX(s) ((s) & 0xFFF8)
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#define EXCEPTION_HAS_ERROR_CODE(x) (((x) == 8) || ((x) >= 10 && (x) <= 14))
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#define PAGE_ALIGN(x) ((x) & 0xFFFFF000)
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#define PAGE_OFFSET(x) ((x) & 0x00000FFF)
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#ifndef PAGE_SIZE
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#define PAGE_SIZE 4096
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#endif
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typedef struct _SOFT386_MOD_REG_RM
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{
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SOFT386_GEN_REGS Register;
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BOOLEAN Memory;
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union
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{
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SOFT386_GEN_REGS SecondRegister;
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ULONG MemoryAddress;
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};
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} SOFT386_MOD_REG_RM, *PSOFT386_MOD_REG_RM;
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#pragma pack(push, 1)
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typedef union _SOFT386_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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} SOFT386_PAGE_DIR, *PSOFT386_PAGE_DIR;
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typedef union _SOFT386_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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} SOFT386_PAGE_TABLE, *PSOFT386_PAGE_TABLE;
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#pragma pack(pop)
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/* FUNCTIONS ******************************************************************/
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BOOLEAN
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Soft386ReadMemory
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(
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PSOFT386_STATE State,
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SOFT386_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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Soft386WriteMemory
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(
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PSOFT386_STATE State,
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SOFT386_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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Soft386InterruptInternal
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(
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PSOFT386_STATE State,
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USHORT SegmentSelector,
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ULONG Offset,
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BOOLEAN InterruptGate
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);
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VOID
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FASTCALL
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Soft386ExceptionWithErrorCode
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(
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PSOFT386_STATE State,
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SOFT386_EXCEPTIONS ExceptionCode,
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ULONG ErrorCode
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);
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/* INLINED FUNCTIONS **********************************************************/
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/* static */ FORCEINLINE
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INT
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Soft386GetCurrentPrivLevel(PSOFT386_STATE State)
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{
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return GET_SEGMENT_RPL(State->SegmentRegs[SOFT386_REG_CS].Selector);
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}
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#include "common.inl"
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#endif // _COMMON_H_
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/* EOF */
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