621 lines
17 KiB
C
621 lines
17 KiB
C
/****************************************************************************
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*
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* Realmode X86 Emulator Library
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*
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* Copyright (C) 1996-1999 SciTech Software, Inc.
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* Copyright (C) David Mosberger-Tang
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* Copyright (C) 1999 Egbert Eich
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*
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* ========================================================================
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of the authors not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The authors makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: Any
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* Developer: Kendall Bennett
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*
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* Description: This file includes subroutines which are related to
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* programmed I/O and memory access. Included in this module
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* are default functions with limited usefulness. For real
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* uses these functions will most likely be overriden by the
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* user library.
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*
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****************************************************************************/
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/* $XFree86: xc/extras/x86emu/src/x86emu/sys.c,v 1.5 2000/08/23 22:10:01 tsi Exp $ */
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#include "radeonfb.h"
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#include "pci.h"
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#include "x86emu.h"
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#include "x86regs.h"
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#include "x86debug.h"
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#include "x86prim_ops.h"
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#ifndef NULL
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#define NULL ((void *)0)
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#endif
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extern uint8_t inb(uint16_t port);
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extern uint16_t inw(uint16_t port);
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extern uint32_t inl(uint16_t port);
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extern void outb(uint8_t val, uint16_t port);
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extern void outw(uint16_t val, uint16_t port);
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extern void outl(uint32_t val, uint16_t port);
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extern uint16_t swap_short(uint16_t val);
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extern uint32_t swap_long(uint32_t val);
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/*------------------------- Global Variables ------------------------------*/
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X86EMU_sysEnv _X86EMU_env; /* Global emulator machine state */
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X86EMU_intrFuncs _X86EMU_intrTab[256];
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extern struct radeonfb_info *rinfo_biosemu;
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extern uint32_t offset_mem;
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/*----------------------------- Implementation ----------------------------*/
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/****************************************************************************
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PARAMETERS:
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addr - Emulator memory address to read
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RETURNS:
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Byte value read from emulator memory.
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REMARKS:
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Reads a byte value from the emulator memory.
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****************************************************************************/
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uint8_t X86API rdb(uint32_t addr)
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{
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uint8_t val;
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if((addr >= 0xA0000) && (addr <= 0xBFFFF))
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{
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX("rdb(", addr);
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#endif
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val = *(uint8_t *)(offset_mem+addr);
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX(") = ", val);
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DPRINT("\r\n");
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#endif
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}
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else
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{
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#if 0
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if(addr >= M.mem_size)
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{
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DB( { DPRINTVALHEX("mem_ptr: address ", addr);
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DPRINT(" out of range!\r\n"); } )
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HALT_SYS();
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}
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#endif
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#if 0
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if(addr < 0x200)
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{
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DPRINTVALHEXWORD("", M.x86.R_CS);
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DPRINTVALHEXWORD(":", M.x86.R_IP);
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DPRINTVALHEX(" updating int vector ", addr >> 2);
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DPRINT("\r\n");
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}
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#endif
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val = *(uint8_t *)(M.mem_base + addr);
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}
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DB(if (DEBUG_MEM_TRACE())
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{
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DPRINTVALHEXLONG("", addr);
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DPRINTVALHEXBYTE(" 1 -> ", val);
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DPRINT("\r\n");
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} )
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return val;
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}
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/****************************************************************************
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PARAMETERS:
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addr - Emulator memory address to read
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RETURNS:
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Word value read from emulator memory.
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REMARKS:
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Reads a word value from the emulator memory.
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****************************************************************************/
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uint16_t X86API rdw(uint32_t addr)
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{
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uint16_t val;
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if((addr >= 0xA0000) && (addr <= 0xBFFFF))
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{
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX("rdw(", addr);
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#endif
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val = swpw(*(uint16_t *)(offset_mem+addr));
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX(") = ", val);
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DPRINT("\r\n");
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#endif
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}
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else
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{
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#if 0
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if(addr > M.mem_size - 2)
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{
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DB( { DPRINTVALHEX("mem_ptr: address ", addr);
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DPRINT(" out of range!\r\n"); } )
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HALT_SYS();
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}
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#endif
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#if 0
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if(addr < 0x200)
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{
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DPRINTVALHEXWORD("", M.x86.R_CS);
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DPRINTVALHEXWORD(":", M.x86.R_IP);
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DPRINTVALHEX(" updating int vector ", addr >> 2);
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DPRINT("\r\n");
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}
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#endif
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val = (uint16_t)(*(uint8_t *)(M.mem_base + addr));
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val |= (((uint16_t)( *(uint8_t *)(M.mem_base + addr + 1))) << 8);
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// val = *(uint16_t *)(M.mem_base + addr);
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}
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DB(if (DEBUG_MEM_TRACE())
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{
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DPRINTVALHEXLONG("", addr);
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DPRINTVALHEXWORD(" 2 -> ", val);
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DPRINT("\r\n");
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} )
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return val;
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}
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/****************************************************************************
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PARAMETERS:
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addr - Emulator memory address to read
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RETURNS:
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Long value read from emulator memory.
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REMARKS:
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Reads a long value from the emulator memory.
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****************************************************************************/
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uint32_t X86API rdl(uint32_t addr)
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{
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uint32_t val;
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if((addr >= 0xA0000) && (addr <= 0xBFFFF))
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{
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX("rdl(", addr);
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#endif
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val = swap_long(*(uint32_t *)(offset_mem+addr));
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX(") = ", val);
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DPRINT("\r\n");
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#endif
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}
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else
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{
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#if 0
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if(addr > M.mem_size - 4)
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{
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DB( { DPRINTVALHEX("mem_ptr: address ", addr);
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DPRINT(" out of range!\r\n"); } )
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HALT_SYS();
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}
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#endif
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#if 0
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if(addr < 0x200)
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{
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DPRINTVALHEXWORD("", M.x86.R_CS);
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DPRINTVALHEXWORD(":", M.x86.R_IP);
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DPRINTVALHEX(" updating int vector ", addr >> 2);
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DPRINT("\r\n");
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}
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#endif
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val = swap_long(*(uint32_t *)(M.mem_base + addr));
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// val = *(uint32_t *)(M.mem_base + addr);
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}
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DB(if (DEBUG_MEM_TRACE())
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{
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DPRINTVALHEXLONG("", addr);
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DPRINTVALHEXLONG(" 4 -> ", val);
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DPRINT("\r\n");
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} )
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return val;
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}
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/****************************************************************************
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PARAMETERS:
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addr - Emulator memory address to read
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val - Value to store
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REMARKS:
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Writes a byte value to emulator memory.
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****************************************************************************/
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void X86API wrb(uint32_t addr, uint8_t val)
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{
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if((addr >= 0xA0000) && (addr <= 0xBFFFF))
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{
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX("wrb(", addr);
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DPRINTVALHEX(") = ", val);
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DPRINT("\r\n");
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#endif
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*(uint8_t *)(offset_mem+addr) = val;
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}
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else
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{
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if(addr >= M.mem_size)
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{
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DB( { DPRINTVALHEX("mem_ptr: address ", addr);
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DPRINT(" out of range!\r\n"); } )
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HALT_SYS();
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}
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#if 0
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if(addr < 0x200)
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{
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DPRINTVALHEXWORD("", M.x86.R_CS);
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DPRINTVALHEXWORD(":", M.x86.R_IP);
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DPRINTVALHEX(" updating int vector ", addr >> 2);
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DPRINT("\r\n");
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}
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#endif
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*(uint8_t *)(M.mem_base + addr) = val;
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}
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DB(if (DEBUG_MEM_TRACE())
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{
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DPRINTVALHEXLONG("", addr);
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DPRINTVALHEXBYTE(" 1 <- ", val);
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DPRINT("\r\n");
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} )
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}
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/****************************************************************************
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PARAMETERS:
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addr - Emulator memory address to read
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val - Value to store
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REMARKS:
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Writes a word value to emulator memory.
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****************************************************************************/
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void X86API wrw(uint32_t addr, uint16_t val)
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{
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if((addr >= 0xA0000) && (addr <= 0xBFFFF))
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{
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX("wrw(", addr);
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DPRINTVALHEX(") = ", val);
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DPRINT("\r\n");
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#endif
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#ifdef DIRECT_ACCESS
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*(uint16_t *)(offset_mem+addr) = swap_short(val);
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#else
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#ifdef PCI_XBIOS
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write_mem_word(rinfo_biosemu->handle, offset_mem+addr, val);
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#else
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Write_mem_word(rinfo_biosemu->handle, offset_mem+addr, val);
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#endif
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#endif
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}
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else
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{
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if(addr > M.mem_size - 2)
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{
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DB( { DPRINTVALHEX("mem_ptr: address ", addr);
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DPRINT(" out of range!\r\n"); } )
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HALT_SYS();
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}
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#if 0
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if(addr < 0x200)
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{
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DPRINTVALHEXWORD("", M.x86.R_CS);
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DPRINTVALHEXWORD(":", M.x86.R_IP);
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DPRINTVALHEX(" updating int vector ", addr >> 2);
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DPRINT("\r\n");
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}
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#endif
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*(uint8_t *)(M.mem_base + addr) = (uint8_t)val;
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*(uint8_t *)(M.mem_base + addr + 1) = (uint8_t)(val >> 8);
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// *(uint16_t *)(M.mem_base + addr) = val;
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}
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DB(if (DEBUG_MEM_TRACE())
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{
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DPRINTVALHEXLONG("", addr);
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DPRINTVALHEXWORD(" 2 <- ", val);
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DPRINT("\r\n");
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} )
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}
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/****************************************************************************
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PARAMETERS:
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addr - Emulator memory address to read
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val - Value to store
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REMARKS:
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Writes a long value to emulator memory.
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****************************************************************************/
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void X86API wrl(uint32_t addr, uint32_t val)
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{
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if((addr >= 0xA0000) && (addr <= 0xBFFFF))
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{
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#ifdef DEBUG_X86EMU_PCI
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DPRINTVALHEX("wrl(", addr);
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DPRINTVALHEX(") = ", val);
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DPRINT("\r\n");
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#endif
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#ifdef DIRECT_ACCESS
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*(uint32_t *)(offset_mem+addr) = swap_long(val);
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#else
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#ifdef PCI_XBIOS
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write_mem_longword(rinfo_biosemu->handle, offset_mem+addr, val);
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#else
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Write_mem_longword(rinfo_biosemu->handle, offset_mem+addr, val);
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#endif
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#endif
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}
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else
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{
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if(addr > M.mem_size - 4)
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{
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DB( { DPRINTVALHEX("mem_ptr: address ", addr);
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DPRINT(" out of range!\r\n"); } )
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HALT_SYS();
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}
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#if 0
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if(addr < 0x200)
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{
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DPRINTVALHEXWORD("", M.x86.R_CS);
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DPRINTVALHEXWORD(":", M.x86.R_IP);
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DPRINTVALHEX(" updating int vector ", addr >> 2);
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DPRINT("\r\n");
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}
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#endif
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*(uint32_t *)(M.mem_base + addr) = swap_long(val);
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// *(uint32_t *)(M.mem_base + addr) = val;
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}
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DB(if (DEBUG_MEM_TRACE())
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{
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DPRINTVALHEXLONG("", addr);
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DPRINTVALHEXLONG(" 4 <- ", val);
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DPRINT("\r\n");
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} )
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}
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/****************************************************************************
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PARAMETERS:
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addr - PIO address to read
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RETURN:
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0
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REMARKS:
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Default PIO byte read function. Doesn't perform real inb.
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****************************************************************************/
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static uint8_t X86API p_inb(X86EMU_pioAddr addr)
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{
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DB(if (DEBUG_IO_TRACE())
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{
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DPRINTVALHEXWORD("inb ", addr);
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DPRINT(" \r\n");
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} )
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return inb(addr);
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}
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/****************************************************************************
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PARAMETERS:
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addr - PIO address to read
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RETURN:
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0
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REMARKS:
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Default PIO word read function. Doesn't perform real inw.
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****************************************************************************/
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static uint16_t X86API p_inw(X86EMU_pioAddr addr)
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{
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DB(if (DEBUG_IO_TRACE())
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{
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DPRINTVALHEXWORD("inw ", addr);
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DPRINT(" \r\n");
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} )
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return inw(addr);
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}
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|
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/****************************************************************************
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PARAMETERS:
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addr - PIO address to read
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RETURN:
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0
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REMARKS:
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Default PIO long read function. Doesn't perform real inl.
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****************************************************************************/
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static uint32_t X86API p_inl(X86EMU_pioAddr addr)
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{
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DB(if (DEBUG_IO_TRACE())
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{
|
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DPRINTVALHEXWORD("inl ", addr);
|
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DPRINT(" \r\n");
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} )
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return inl(addr);
|
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}
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|
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/****************************************************************************
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PARAMETERS:
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addr - PIO address to write
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val - Value to store
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REMARKS:
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Default PIO byte write function. Doesn't perform real outb.
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****************************************************************************/
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static void X86API p_outb(X86EMU_pioAddr addr, uint8_t val)
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{
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DB(if (DEBUG_IO_TRACE())
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{
|
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DPRINTVALHEXBYTE("outb ", val);
|
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DPRINTVALHEXWORD(" -> ", addr);
|
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DPRINT(" \r\n");
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|
} )
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outb(val, addr);
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return;
|
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}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to write
|
|
val - Value to store
|
|
REMARKS:
|
|
Default PIO word write function. Doesn't perform real outw.
|
|
****************************************************************************/
|
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static void X86API p_outw(X86EMU_pioAddr addr, uint16_t val)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
{
|
|
DPRINTVALHEXWORD("outw ", (unsigned long)val);
|
|
DPRINTVALHEXWORD(" -> ", addr);
|
|
DPRINT(" \r\n");
|
|
} )
|
|
outw(val, addr);
|
|
return;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to write
|
|
val - Value to store
|
|
REMARKS:
|
|
Default PIO ;ong write function. Doesn't perform real outl.
|
|
****************************************************************************/
|
|
static void X86API p_outl(X86EMU_pioAddr addr, uint32_t val)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
{
|
|
DPRINTVALHEXLONG("outl ", val);
|
|
DPRINTVALHEXWORD(" -> ", addr);
|
|
DPRINT(" \r\n");
|
|
} )
|
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outl(val, addr);
|
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return;
|
|
}
|
|
|
|
/*------------------------- Global Variables ------------------------------*/
|
|
|
|
uint8_t(X86APIP sys_rdb) (uint32_t addr) = rdb;
|
|
uint16_t(X86APIP sys_rdw) (uint32_t addr) = rdw;
|
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uint32_t(X86APIP sys_rdl) (uint32_t addr) = rdl;
|
|
void (X86APIP sys_wrb) (uint32_t addr, uint8_t val) = wrb;
|
|
void (X86APIP sys_wrw) (uint32_t addr, uint16_t val) = wrw;
|
|
void (X86APIP sys_wrl) (uint32_t addr, uint32_t val) = wrl;
|
|
uint8_t(X86APIP sys_inb) (X86EMU_pioAddr addr) = p_inb;
|
|
uint16_t(X86APIP sys_inw) (X86EMU_pioAddr addr) = p_inw;
|
|
uint32_t(X86APIP sys_inl) (X86EMU_pioAddr addr) = p_inl;
|
|
void (X86APIP sys_outb) (X86EMU_pioAddr addr, uint8_t val) = p_outb;
|
|
void (X86APIP sys_outw) (X86EMU_pioAddr addr, uint16_t val) = p_outw;
|
|
void (X86APIP sys_outl) (X86EMU_pioAddr addr, uint32_t val) = p_outl;
|
|
|
|
/*----------------------------- Setup -------------------------------------*/
|
|
|
|
#if 0 // cannot works whith data in flash
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
funcs - New memory function pointers to make active
|
|
|
|
REMARKS:
|
|
This function is used to set the pointers to functions which access
|
|
memory space, allowing the user application to override these functions
|
|
and hook them out as necessary for their application.
|
|
****************************************************************************/
|
|
void X86EMU_setupMemFuncs(X86EMU_memFuncs * funcs)
|
|
{
|
|
sys_rdb = funcs->rdb;
|
|
sys_rdw = funcs->rdw;
|
|
sys_rdl = funcs->rdl;
|
|
sys_wrb = funcs->wrb;
|
|
sys_wrw = funcs->wrw;
|
|
sys_wrl = funcs->wrl;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
funcs - New programmed I/O function pointers to make active
|
|
|
|
REMARKS:
|
|
This function is used to set the pointers to functions which access
|
|
I/O space, allowing the user application to override these functions
|
|
and hook them out as necessary for their application.
|
|
****************************************************************************/
|
|
void X86EMU_setupPioFuncs(X86EMU_pioFuncs * funcs)
|
|
{
|
|
sys_inb = funcs->inb;
|
|
sys_inw = funcs->inw;
|
|
sys_inl = funcs->inl;
|
|
sys_outb = funcs->outb;
|
|
sys_outw = funcs->outw;
|
|
sys_outl = funcs->outl;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
funcs - New interrupt vector table to make active
|
|
|
|
REMARKS:
|
|
This function is used to set the pointers to functions which handle
|
|
interrupt processing in the emulator, allowing the user application to
|
|
hook interrupts as necessary for their application. Any interrupts that
|
|
are not hooked by the user application, and reflected and handled internally
|
|
in the emulator via the interrupt vector table. This allows the application
|
|
to get control when the code being emulated executes specific software
|
|
interrupts.
|
|
****************************************************************************/
|
|
void X86EMU_setupIntrFuncs(X86EMU_intrFuncs funcs[])
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 256; i++)
|
|
_X86EMU_intrTab[i] = NULL;
|
|
if (funcs) {
|
|
for (i = 0; i < 256; i++)
|
|
_X86EMU_intrTab[i] = funcs[i];
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
int - New software interrupt to prepare for
|
|
|
|
REMARKS:
|
|
This function is used to set up the emulator state to exceute a software
|
|
interrupt. This can be used by the user application code to allow an
|
|
interrupt to be hooked, examined and then reflected back to the emulator
|
|
so that the code in the emulator will continue processing the software
|
|
interrupt as per normal. This essentially allows system code to actively
|
|
hook and handle certain software interrupts as necessary.
|
|
****************************************************************************/
|
|
void X86EMU_prepareForInt(int num)
|
|
{
|
|
push_word((uint16_t) M.x86.R_FLG);
|
|
CLEAR_FLAG(F_IF);
|
|
CLEAR_FLAG(F_TF);
|
|
push_word(M.x86.R_CS);
|
|
M.x86.R_CS = mem_access_word(num * 4 + 2);
|
|
push_word(M.x86.R_IP);
|
|
M.x86.R_IP = mem_access_word(num * 4);
|
|
M.x86.intr = 0;
|
|
}
|
|
|
|
void X86EMU_setMemBase(void *base, unsigned long size)
|
|
{
|
|
M.mem_base = (int) base;
|
|
M.mem_size = size;
|
|
}
|