This is a BIOS emulator, porting from SciTech for u-boot, mainly for

ATI video card BIOS. and can be used for x86 code emulation by some
modifications.

Signed-off-by: Jason Jin <Jason.jin@freescale.com>

1 files changed, 169 insertions, 0 deletions

diff --git a/drivers/bios_emulator/biosemui.h b/drivers/bios_emulator/biosemui.h
new file mode 100644
index 0000000..3265ac1
--- /dev/null
+++ b/drivers/bios_emulator/biosemui.h
@@ -0,0 +1,169 @@
+/****************************************************************************
+*
+*                        BIOS emulator and interface
+*                      to Realmode X86 Emulator Library
+*
+*  Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+*  Jason Jin <Jason.jin@freescale.com>
+*
+*               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:  Internal header file for the BIOS emulator library.
+*
+* 		Jason ported this file to u-boot, Added some architecture
+* 		related Macro.
+*
+****************************************************************************/
+
+#ifndef __BIOSEMUI_H
+#define __BIOSEMUI_H
+
+#include "biosemu.h"
+#include <asm/io.h>
+/*---------------------- Macros and type definitions ----------------------*/
+
+#ifdef DEBUG
+#define DB(x)   x
+#else
+#define DB(x)   do{}while(0);
+#endif
+
+#define BIOS_SEG        0xfff0
+extern X86EMU_sysEnv _X86EMU_env;
+#define M               _X86EMU_env
+
+/* Macros to read and write values to x86 emulator memory. Memory is always
+ * considered to be little endian, so we use macros to do endian swapping
+ * where necessary.
+ */
+
+#ifdef __BIG_ENDIAN__
+#define readb_le(base)      *((u8*)(base))
+#define readw_le(base)      ((u16)readb_le(base) | ((u16)readb_le((base) + 1) << 8))
+#define readl_le(base)      ((u32)readb_le((base) + 0) | ((u32)readb_le((base) + 1) << 8) | \
+                            ((u32)readb_le((base) + 2) << 16) | ((u32)readb_le((base) + 3) << 24))
+#define writeb_le(base, v)  *((u8*)(base)) = (v)
+#define writew_le(base, v)  writeb_le(base + 0, (v >> 0) & 0xff),       \
+                            writeb_le(base + 1, (v >> 8) & 0xff)
+#define writel_le(base, v)  writeb_le(base + 0, (v >> 0) & 0xff),       \
+                            writeb_le(base + 1, (v >> 8) & 0xff),       \
+                            writeb_le(base + 2, (v >> 16) & 0xff),      \
+                            writeb_le(base + 3, (v >> 24) & 0xff)
+#else
+#define readb_le(base)      *((u8*)(base))
+#define readw_le(base)      *((u16*)(base))
+#define readl_le(base)      *((u32*)(base))
+#define writeb_le(base, v)  *((u8*)(base)) = (v)
+#define writew_le(base, v)  *((u16*)(base)) = (v)
+#define writel_le(base, v)  *((u32*)(base)) = (v)
+#endif
+
+/****************************************************************************
+REMARKS:
+Function codes passed to the emulated I/O port functions to determine the
+type of operation to perform.
+****************************************************************************/
+typedef enum {
+	REG_READ_BYTE = 0,
+	REG_READ_WORD = 1,
+	REG_READ_DWORD = 2,
+	REG_WRITE_BYTE = 3,
+	REG_WRITE_WORD = 4,
+	REG_WRITE_DWORD = 5
+} RegisterFlags;
+
+/****************************************************************************
+REMARKS:
+Function codes passed to the emulated I/O port functions to determine the
+type of operation to perform.
+****************************************************************************/
+typedef enum {
+	PORT_BYTE = 1,
+	PORT_WORD = 2,
+	PORT_DWORD = 3,
+} PortInfoFlags;
+
+/****************************************************************************
+REMARKS:
+Data structure used to describe the details for the BIOS emulator system
+environment as used by the X86 emulator library.
+
+HEADER:
+biosemu.h
+
+MEMBERS:
+type        - Type of port access (1 = byte, 2 = word, 3 = dword)
+defVal      - Default power on value
+finalVal    - Final value
+****************************************************************************/
+typedef struct {
+	u8 type;
+	u32 defVal;
+	u32 finalVal;
+} BE_portInfo;
+
+#define PM_inpb(port)	inb(port+VIDEO_IO_OFFSET)
+#define PM_inpw(port)	inw(port+VIDEO_IO_OFFSET)
+#define PM_inpd(port)	inl(port+VIDEO_IO_OFFSET)
+#define PM_outpb(port,val)	outb(val,port+VIDEO_IO_OFFSET)
+#define PM_outpw(port,val)	outw(val,port+VIDEO_IO_OFFSET)
+#define PM_outpd(port,val)	outl(val,port+VIDEO_IO_OFFSET)
+
+#define LOG_inpb(port)	PM_inpb(port)
+#define LOG_inpw(port)	PM_inpw(port)
+#define LOG_inpd(port)	PM_inpd(port)
+#define LOG_outpb(port,val)	PM_outpb(port,val)
+#define LOG_outpw(port,val)	PM_outpw(port,val)
+#define LOG_outpd(port,val)	PM_outpd(port,val)
+
+/*-------------------------- Function Prototypes --------------------------*/
+
+/* bios.c */
+
+void _BE_bios_init(u32 * intrTab);
+void _BE_setup_funcs(void);
+
+/* besys.c */
+#define DEBUG_IO()	(M.x86.debug & DEBUG_IO_TRACE_F)
+
+u8 X86API BE_rdb(u32 addr);
+u16 X86API BE_rdw(u32 addr);
+u32 X86API BE_rdl(u32 addr);
+void X86API BE_wrb(u32 addr, u8 val);
+void X86API BE_wrw(u32 addr, u16 val);
+void X86API BE_wrl(u32 addr, u32 val);
+
+u8 X86API BE_inb(X86EMU_pioAddr port);
+u16 X86API BE_inw(X86EMU_pioAddr port);
+u32 X86API BE_inl(X86EMU_pioAddr port);
+void X86API BE_outb(X86EMU_pioAddr port, u8 val);
+void X86API BE_outw(X86EMU_pioAddr port, u16 val);
+void X86API BE_outl(X86EMU_pioAddr port, u32 val);
+#endif
+/* __BIOSEMUI_H */