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+/****************************************************************************
+*
+* 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
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