/****************************************************************************
*
* BIOS emulator and interface
* to Realmode X86 Emulator Library
*
* Copyright (C) 1996-1999 SciTech Software, Inc.
*
* ========================================================================
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the authors not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The authors makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* ========================================================================
*
* Language: ANSI C
* Environment: Any
* Developer: Kendall Bennett
*
* Description: This file includes BIOS emulator I/O and memory access
* functions.
*
****************************************************************************/
#include "biosemui.h"
/*------------------------------- Macros ----------------------------------*/
/* Macros to read and write values to x86 bus memory. Replace these as
* necessary if you need to do something special to access memory over
* the bus on a particular processor family.
*/
#define readb(base,off) *((u8*)((u32)(base) + (off)))
#define readw(base,off) *((u16*)((u32)(base) + (off)))
#define readl(base,off) *((u32*)((u32)(base) + (off)))
#define writeb(v,base,off) *((u8*)((u32)(base) + (off))) = (v)
#define writew(v,base,off) *((u16*)((u32)(base) + (off))) = (v)
#define writel(v,base,off) *((u32*)((u32)(base) + (off))) = (v)
/*----------------------------- Implementation ----------------------------*/
#ifdef DEBUG
# define DEBUG_MEM() (M.x86.debug & DEBUG_MEM_TRACE_F)
#else
# define DEBUG_MEM()
#endif
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
RETURNS:
Byte value read from emulator memory.
REMARKS:
Reads a byte value from the emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
u8 X86API BE_rdb(
u32 addr)
{
u8 val = 0;
if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
val = *(u8*)(_BE_env.biosmem_base + addr - 0xC0000);
}
else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
val = readb(_BE_env.busmem_base, addr - 0xA0000);
}
else if (addr > M.mem_size - 1) {
DB( printk("mem_read: address %#lx out of range!\n", addr);)
HALT_SYS();
}
else {
val = *(u8*)(M.mem_base + addr);
}
DB( if (DEBUG_MEM())
printk("%#08x 1 -> %#x\n", addr, val);)
return val;
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
RETURNS:
Word value read from emulator memory.
REMARKS:
Reads a word value from the emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
u16 X86API BE_rdw(
u32 addr)
{
u16 val = 0;
if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
addr -= 0xC0000;
val = ( *(u8*)(_BE_env.biosmem_base + addr) |
(*(u8*)(_BE_env.biosmem_base + addr + 1) << 8));
}
else
#endif
val = *(u16*)(_BE_env.biosmem_base + addr - 0xC0000);
}
else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
addr -= 0xA0000;
val = ( readb(_BE_env.busmem_base, addr) |
(readb(_BE_env.busmem_base, addr + 1) << 8));
}
else
#endif
val = readw(_BE_env.busmem_base, addr - 0xA0000);
}
else if (addr > M.mem_size - 2) {
DB( printk("mem_read: address %#lx out of range!\n", addr);)
HALT_SYS();
}
else {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
val = ( *(u8*)(M.mem_base + addr) |
(*(u8*)(M.mem_base + addr + 1) << 8));
}
else
#endif
val = *(u16*)(M.mem_base + addr);
}
DB( if (DEBUG_MEM())
printk("%#08x 2 -> %#x\n", addr, val);)
return val;
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
RETURNS:
Long value read from emulator memory.
REMARKS:
Reads a long value from the emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
u32 X86API BE_rdl(
u32 addr)
{
u32 val = 0;
if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
#ifdef __BIG_ENDIAN__
if (addr & 0x3) {
addr -= 0xC0000;
val = ( *(u8*)(_BE_env.biosmem_base + addr + 0) |
(*(u8*)(_BE_env.biosmem_base + addr + 1) << 8) |
(*(u8*)(_BE_env.biosmem_base + addr + 2) << 16) |
(*(u8*)(_BE_env.biosmem_base + addr + 3) << 24));
}
else
#endif
val = *(u32*)(_BE_env.biosmem_base + addr - 0xC0000);
}
else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
#ifdef __BIG_ENDIAN__
if (addr & 0x3) {
addr -= 0xA0000;
val = ( readb(_BE_env.busmem_base, addr) |
(readb(_BE_env.busmem_base, addr + 1) << 8) |
(readb(_BE_env.busmem_base, addr + 2) << 16) |
(readb(_BE_env.busmem_base, addr + 3) << 24));
}
else
#endif
val = readl(_BE_env.busmem_base, addr - 0xA0000);
}
else if (addr > M.mem_size - 4) {
DB( printk("mem_read: address %#lx out of range!\n", addr);)
HALT_SYS();
}
else {
#ifdef __BIG_ENDIAN__
if (addr & 0x3) {
val = ( *(u8*)(M.mem_base + addr + 0) |
(*(u8*)(M.mem_base + addr + 1) << 8) |
(*(u8*)(M.mem_base + addr + 2) << 16) |
(*(u8*)(M.mem_base + addr + 3) << 24));
}
else
#endif
val = *(u32*)(M.mem_base + addr);
}
DB( if (DEBUG_MEM())
printk("%#08x 4 -> %#x\n", addr, val);)
return val;
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
val - Value to store
REMARKS:
Writes a byte value to emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
void X86API BE_wrb(
u32 addr,
u8 val)
{
DB( if (DEBUG_MEM())
printk("%#08x 1 <- %#x\n", addr, val);)
if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
*(u8*)(_BE_env.biosmem_base + addr - 0xC0000) = val;
}
else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
writeb(val, _BE_env.busmem_base, addr - 0xA0000);
}
else if (addr > M.mem_size-1) {
DB( printk("mem_write: address %#lx out of range!\n", addr);)
HALT_SYS();
}
else {
*(u8*)(M.mem_base + addr) = val;
}
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
val - Value to store
REMARKS:
Writes a word value to emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
void X86API BE_wrw(
u32 addr,
u16 val)
{
DB( if (DEBUG_MEM())
printk("%#08x 2 <- %#x\n", addr, val);)
if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
addr -= 0xC0000;
*(u8*)(_BE_env.biosmem_base + addr + 0) = (val >> 0) & 0xff;
*(u8*)(_BE_env.biosmem_base + addr + 1) = (val >> 8) & 0xff;
}
else
#endif
*(u16*)(_BE_env.biosmem_base + addr - 0xC0000) = val;
}
else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
addr -= 0xA0000;
writeb(val >> 0, _BE_env.busmem_base, addr);
writeb(val >> 8, _BE_env.busmem_base, addr + 1);
}
else
#endif
writew(val, _BE_env.busmem_base, addr - 0xA0000);
}
else if (addr > M.mem_size-2) {
DB( printk("mem_write: address %#lx out of range!\n", addr);)
HALT_SYS();
}
else {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
*(u8*)(M.mem_base + addr + 0) = (val >> 0) & 0xff;
*(u8*)(M.mem_base + addr + 1) = (val >> 8) & 0xff;
}
else
#endif
*(u16*)(M.mem_base + addr) = val;
}
}
/****************************************************************************
PARAMETERS:
addr - Emulator memory address to read
val - Value to store
REMARKS:
Writes a long value to emulator memory. We have three distinct memory
regions that are handled differently, which this function handles.
****************************************************************************/
void X86API BE_wrl(
u32 addr,
u32 val)
{
DB( if (DEBUG_MEM())
printk("%#08x 4 <- %#x\n", addr, val);)
if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
addr -= 0xC0000;
*(u8*)(M.mem_base + addr + 0) = (val >> 0) & 0xff;
*(u8*)(M.mem_base + addr + 1) = (val >> 8) & 0xff;
*(u8*)(M.mem_base + addr + 2) = (val >> 16) & 0xff;
*(u8*)(M.mem_base + addr + 3) = (val >> 24) & 0xff;
}
else
#endif
*(u32*)(M.mem_base + addr - 0xC0000) = val;
}
else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
#ifdef __BIG_ENDIAN__
if (addr & 0x3) {
addr -= 0xA0000;
writeb(val >> 0, _BE_env.busmem_base, addr);
writeb(val >> 8, _BE_env.busmem_base, addr + 1);
writeb(val >> 16, _BE_env.busmem_base, addr + 1);
writeb(val >> 24, _BE_env.busmem_base, addr + 1);
}
else
#endif
writel(val, _BE_env.busmem_base, addr - 0xA0000);
}
else if (addr > M.mem_size-4) {
DB( printk("mem_write: address %#lx out of range!\n", addr);)
HALT_SYS();
}
else {
#ifdef __BIG_ENDIAN__
if (addr & 0x1) {
*(u8*)(M.mem_base + addr + 0) = (val >> 0) & 0xff;
*(u8*)(M.mem_base + addr + 1) = (val >> 8) & 0xff;
*(u8*)(M.mem_base + addr + 2) = (val >> 16) & 0xff;
*(u8*)(M.mem_base + addr + 3) = (val >> 24) & 0xff;
}
else
#endif
*(u32*)(M.mem_base + addr) = val;
}
}
/* Debug functions to do ISA/PCI bus port I/O */
#ifdef DEBUG
#define DEBUG_IO() (M.x86.debug & DEBUG_IO_TRACE_F)
u8 X86API BE_inb(int port)
{
u8 val = PM_inpb(port);
if (DEBUG_IO())
printk("%04X:%04X: inb.%04X -> %02X\n",M.x86.saved_cs, M.x86.saved_ip, (ushort)port, val);
return val;
}
u16 X86API BE_inw(int port)
{
u16 val = PM_inpw(port);
if (DEBUG_IO())
printk("%04X:%04X: inw.%04X -> %04X\n",M.x86.saved_cs, M.x86.saved_ip, (ushort)port, val);
return val;
}
u32 X86API BE_inl(int port)
{
u32 val = PM_inpd(port);
if (DEBUG_IO())
printk("%04X:%04X: inl.%04X -> %08X\n",M.x86.saved_cs, M.x86.saved_ip, (ushort)port, val);
return val;
}
void X86API BE_outb(int port, u8 val)
{
if (DEBUG_IO())
printk("%04X:%04X: outb.%04X <- %02X\n",M.x86.saved_cs, M.x86.saved_ip, (ushort)port, val);
PM_outpb(port,val);
}
void X86API BE_outw(int port, u16 val)
{
if (DEBUG_IO())
printk("%04X:%04X: outw.%04X <- %04X\n",M.x86.saved_cs, M.x86.saved_ip, (ushort)port, val);
PM_outpw(port,val);
}
void X86API BE_outl(int port, u32 val)
{
if (DEBUG_IO())
printk("%04X:%04X: outl.%04X <- %08X\n",M.x86.saved_cs, M.x86.saved_ip, (ushort)port, val);
PM_outpd(port,val);
}
#endif
