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, 209 insertions, 0 deletions

diff --git a/drivers/bios_emulator/include/x86emu/debug.h b/drivers/bios_emulator/include/x86emu/debug.h
new file mode 100644
index 000000000..35e1e9a92
--- /dev/null
+++ b/drivers/bios_emulator/include/x86emu/debug.h
@@ -0,0 +1,209 @@
+/****************************************************************************
+*
+*                       Realmode X86 Emulator Library
+*
+*               Copyright (C) 1991-2004 SciTech Software, Inc.
+*                    Copyright (C) David Mosberger-Tang
+*                      Copyright (C) 1999 Egbert Eich
+*
+*  ========================================================================
+*
+*  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:  Header file for debug definitions.
+*
+****************************************************************************/
+
+#ifndef __X86EMU_DEBUG_H
+#define __X86EMU_DEBUG_H
+
+/*---------------------- Macros and type definitions ----------------------*/
+
+/* checks to be enabled for "runtime" */
+
+#define CHECK_IP_FETCH_F                0x1
+#define CHECK_SP_ACCESS_F               0x2
+#define CHECK_MEM_ACCESS_F              0x4	/*using regular linear pointer */
+#define CHECK_DATA_ACCESS_F             0x8	/*using segment:offset */
+
+#ifdef DEBUG
+# define CHECK_IP_FETCH()               (M.x86.check & CHECK_IP_FETCH_F)
+# define CHECK_SP_ACCESS()              (M.x86.check & CHECK_SP_ACCESS_F)
+# define CHECK_MEM_ACCESS()             (M.x86.check & CHECK_MEM_ACCESS_F)
+# define CHECK_DATA_ACCESS()            (M.x86.check & CHECK_DATA_ACCESS_F)
+#else
+# define CHECK_IP_FETCH()
+# define CHECK_SP_ACCESS()
+# define CHECK_MEM_ACCESS()
+# define CHECK_DATA_ACCESS()
+#endif
+
+#ifdef DEBUG
+# define DEBUG_INSTRUMENT()     (M.x86.debug & DEBUG_INSTRUMENT_F)
+# define DEBUG_DECODE()         (M.x86.debug & DEBUG_DECODE_F)
+# define DEBUG_TRACE()          (M.x86.debug & DEBUG_TRACE_F)
+# define DEBUG_STEP()           (M.x86.debug & DEBUG_STEP_F)
+# define DEBUG_DISASSEMBLE()    (M.x86.debug & DEBUG_DISASSEMBLE_F)
+# define DEBUG_BREAK()          (M.x86.debug & DEBUG_BREAK_F)
+# define DEBUG_SVC()            (M.x86.debug & DEBUG_SVC_F)
+# define DEBUG_SAVE_IP_CS()     (M.x86.debug & DEBUG_SAVE_CS_IP)
+
+# define DEBUG_FS()             (M.x86.debug & DEBUG_FS_F)
+# define DEBUG_PROC()           (M.x86.debug & DEBUG_PROC_F)
+# define DEBUG_SYSINT()         (M.x86.debug & DEBUG_SYSINT_F)
+# define DEBUG_TRACECALL()      (M.x86.debug & DEBUG_TRACECALL_F)
+# define DEBUG_TRACECALLREGS()  (M.x86.debug & DEBUG_TRACECALL_REGS_F)
+# define DEBUG_SYS()            (M.x86.debug & DEBUG_SYS_F)
+# define DEBUG_MEM_TRACE()      (M.x86.debug & DEBUG_MEM_TRACE_F)
+# define DEBUG_IO_TRACE()       (M.x86.debug & DEBUG_IO_TRACE_F)
+# define DEBUG_DECODE_NOPRINT() (M.x86.debug & DEBUG_DECODE_NOPRINT_F)
+#else
+# define DEBUG_INSTRUMENT()     0
+# define DEBUG_DECODE()         0
+# define DEBUG_TRACE()          0
+# define DEBUG_STEP()           0
+# define DEBUG_DISASSEMBLE()    0
+# define DEBUG_BREAK()          0
+# define DEBUG_SVC()            0
+# define DEBUG_SAVE_IP_CS()     0
+# define DEBUG_FS()             0
+# define DEBUG_PROC()           0
+# define DEBUG_SYSINT()         0
+# define DEBUG_TRACECALL()      0
+# define DEBUG_TRACECALLREGS()  0
+# define DEBUG_SYS()            0
+# define DEBUG_MEM_TRACE()      0
+# define DEBUG_IO_TRACE()       0
+# define DEBUG_DECODE_NOPRINT() 0
+#endif
+
+#ifdef DEBUG
+
+# define DECODE_PRINTF(x)       if (DEBUG_DECODE()) \
+                                    x86emu_decode_printf(x)
+# define DECODE_PRINTF2(x,y)    if (DEBUG_DECODE()) \
+                                    x86emu_decode_printf2(x,y)
+
+/*
+ * The following allow us to look at the bytes of an instruction.  The
+ * first INCR_INSTRN_LEN, is called everytime bytes are consumed in
+ * the decoding process.  The SAVE_IP_CS is called initially when the
+ * major opcode of the instruction is accessed.
+ */
+#define INC_DECODED_INST_LEN(x)                     \
+    if (DEBUG_DECODE())                             \
+        x86emu_inc_decoded_inst_len(x)
+
+#define SAVE_IP_CS(x,y)                                         \
+    if (DEBUG_DECODE() | DEBUG_TRACECALL() | DEBUG_BREAK() \
+              | DEBUG_IO_TRACE() | DEBUG_SAVE_IP_CS()) { \
+        M.x86.saved_cs = x;                                     \
+        M.x86.saved_ip = y;                                     \
+    }
+#else
+# define INC_DECODED_INST_LEN(x)
+# define DECODE_PRINTF(x)
+# define DECODE_PRINTF2(x,y)
+# define SAVE_IP_CS(x,y)
+#endif
+
+#ifdef DEBUG
+#define TRACE_REGS()                                        \
+    if (DEBUG_DISASSEMBLE()) {                              \
+        x86emu_just_disassemble();                          \
+        goto EndOfTheInstructionProcedure;                  \
+    }                                                       \
+    if (DEBUG_TRACE() || DEBUG_DECODE()) X86EMU_trace_regs()
+#else
+# define TRACE_REGS()
+#endif
+
+#ifdef DEBUG
+# define SINGLE_STEP()      if (DEBUG_STEP()) x86emu_single_step()
+#else
+# define SINGLE_STEP()
+#endif
+
+#define TRACE_AND_STEP()    \
+    TRACE_REGS();           \
+    SINGLE_STEP()
+
+#ifdef DEBUG
+# define START_OF_INSTR()
+# define END_OF_INSTR()     EndOfTheInstructionProcedure: x86emu_end_instr();
+# define END_OF_INSTR_NO_TRACE()    x86emu_end_instr();
+#else
+# define START_OF_INSTR()
+# define END_OF_INSTR()
+# define END_OF_INSTR_NO_TRACE()
+#endif
+
+#ifdef DEBUG
+# define  CALL_TRACE(u,v,w,x,s)                                 \
+    if (DEBUG_TRACECALLREGS())                                  \
+        x86emu_dump_regs();                                     \
+    if (DEBUG_TRACECALL())                                      \
+        printk("%04x:%04x: CALL %s%04x:%04x\n", u , v, s, w, x);
+# define RETURN_TRACE(n,u,v)                                    \
+    if (DEBUG_TRACECALLREGS())                                  \
+        x86emu_dump_regs();                                     \
+    if (DEBUG_TRACECALL())                                      \
+        printk("%04x:%04x: %s\n",u,v,n);
+#else
+# define CALL_TRACE(u,v,w,x,s)
+# define RETURN_TRACE(n,u,v)
+#endif
+
+#ifdef DEBUG
+#define DB(x)   x
+#else
+#define DB(x)
+#endif
+
+/*-------------------------- Function Prototypes --------------------------*/
+
+#ifdef  __cplusplus
+extern "C" {			/* Use "C" linkage when in C++ mode */
+#endif
+
+	extern void x86emu_inc_decoded_inst_len(int x);
+	extern void x86emu_decode_printf(char *x);
+	extern void x86emu_decode_printf2(char *x, int y);
+	extern void x86emu_just_disassemble(void);
+	extern void x86emu_single_step(void);
+	extern void x86emu_end_instr(void);
+	extern void x86emu_dump_regs(void);
+	extern void x86emu_dump_xregs(void);
+	extern void x86emu_print_int_vect(u16 iv);
+	extern void x86emu_instrument_instruction(void);
+	extern void x86emu_check_ip_access(void);
+	extern void x86emu_check_sp_access(void);
+	extern void x86emu_check_mem_access(u32 p);
+	extern void x86emu_check_data_access(uint s, uint o);
+
+#ifdef  __cplusplus
+}				/* End of "C" linkage for C++       */
+#endif
+#endif				/* __X86EMU_DEBUG_H */