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, 392 insertions, 0 deletions

diff --git a/drivers/bios_emulator/include/biosemu.h b/drivers/bios_emulator/include/biosemu.h
new file mode 100644
index 0000000..13cb317
--- /dev/null
+++ b/drivers/bios_emulator/include/biosemu.h
@@ -0,0 +1,392 @@
+/****************************************************************************
+*
+*                        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:  Header file for the real mode x86 BIOS emulator, which is
+*               used to warmboot any number of VGA compatible PCI/AGP
+*               controllers under any OS, on any processor family that
+*               supports PCI. We also allow the user application to call
+*               real mode BIOS functions and Int 10h functions (including
+*               the VESA BIOS).
+*
+****************************************************************************/
+
+#ifndef __BIOSEMU_H
+#define __BIOSEMU_H
+
+#ifdef __KERNEL__
+#include "x86emu.h"
+#else
+#include "x86emu.h"
+#include "pmapi.h"
+#include "pcilib.h"
+#endif
+
+/*---------------------- Macros and type definitions ----------------------*/
+
+#pragma pack(1)
+
+#ifndef __KERNEL__
+/****************************************************************************
+REMARKS:
+Data structure used to describe the details specific to a particular VGA
+controller. This information is used to allow the VGA controller to be
+swapped on the fly within the BIOS emulator.
+
+HEADER:
+biosemu.h
+
+MEMBERS:
+pciInfo         - PCI device information block for the controller
+BIOSImage       - Pointer to a read/write copy of the BIOS image
+BIOSImageLen    - Length of the BIOS image
+LowMem          - Copy of key low memory areas
+****************************************************************************/
+typedef struct {
+	PCIDeviceInfo *pciInfo;
+	void *BIOSImage;
+	ulong BIOSImageLen;
+	uchar LowMem[1536];
+} BE_VGAInfo;
+#else
+/****************************************************************************
+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:
+vgaInfo         - VGA BIOS information structure
+biosmem_base    - Base of the BIOS image
+biosmem_limit   - Limit of the BIOS image
+busmem_base     - Base of the VGA bus memory
+****************************************************************************/
+typedef struct {
+	int function;
+	int device;
+	int bus;
+	u32 VendorID;
+	u32 DeviceID;
+	pci_dev_t pcidev;
+	void *BIOSImage;
+	u32 BIOSImageLen;
+	u8 LowMem[1536];
+} BE_VGAInfo;
+
+#endif				/* __KERNEL__ */
+
+#define CRT_C   24		/* 24  CRT Controller Registers             */
+#define ATT_C   21		/* 21  Attribute Controller Registers       */
+#define GRA_C   9		/* 9   Graphics Controller Registers        */
+#define SEQ_C   5		/* 5   Sequencer Registers                  */
+#define PAL_C   768		/* 768 Palette Registers                    */
+
+/****************************************************************************
+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:
+vgaInfo         - VGA BIOS information structure
+biosmem_base    - Base of the BIOS image
+biosmem_limit   - Limit of the BIOS image
+busmem_base     - Base of the VGA bus memory
+timer           - Timer used to emulate PC timer ports
+timer0          - Latched value for timer 0
+timer0Latched   - True if timer 0 value was just latched
+timer2          - Current value for timer 2
+emulateVGA      - True to emulate VGA I/O and memory accesses
+****************************************************************************/
+
+typedef struct {
+	BE_VGAInfo vgaInfo;
+	ulong biosmem_base;
+	ulong biosmem_limit;
+	ulong busmem_base;
+
+	u32 timer0;
+	int timer0Latched;
+	u32 timer1;
+	int timer1Latched;
+	u32 timer2;
+	int timer2Latched;
+
+	int emulateVGA;
+	u8 emu61;
+	u8 emu70;
+	int flipFlop3C0;
+	u32 configAddress;
+	u8 emu3C0;
+	u8 emu3C1[ATT_C];
+	u8 emu3C2;
+	u8 emu3C4;
+	u8 emu3C5[SEQ_C];
+	u8 emu3C6;
+	uint emu3C7;
+	uint emu3C8;
+	u8 emu3C9[PAL_C];
+	u8 emu3CE;
+	u8 emu3CF[GRA_C];
+	u8 emu3D4;
+	u8 emu3D5[CRT_C];
+	u8 emu3DA;
+
+} BE_sysEnv;
+
+#ifdef __KERNEL__
+
+/* Define some types when compiling for the Linux kernel that normally
+ * come from the SciTech PM library.
+ */
+
+/****************************************************************************
+REMARKS:
+Structure describing the 32-bit extended x86 CPU registers
+
+HEADER:
+pmapi.h
+
+MEMBERS:
+eax     - Value of the EAX register
+ebx     - Value of the EBX register
+ecx     - Value of the ECX register
+edx     - Value of the EDX register
+esi     - Value of the ESI register
+edi     - Value of the EDI register
+cflag   - Value of the carry flag
+****************************************************************************/
+typedef struct {
+	u32 eax;
+	u32 ebx;
+	u32 ecx;
+	u32 edx;
+	u32 esi;
+	u32 edi;
+	u32 cflag;
+} RMDWORDREGS;
+
+/****************************************************************************
+REMARKS:
+Structure describing the 16-bit x86 CPU registers
+
+HEADER:
+pmapi.h
+
+MEMBERS:
+ax      - Value of the AX register
+bx      - Value of the BX register
+cx      - Value of the CX register
+dx      - Value of the DX register
+si      - Value of the SI register
+di      - Value of the DI register
+cflag   - Value of the carry flag
+****************************************************************************/
+#ifdef __BIG_ENDIAN__
+typedef struct {
+	u16 ax_hi, ax;
+	u16 bx_hi, bx;
+	u16 cx_hi, cx;
+	u16 dx_hi, dx;
+	u16 si_hi, si;
+	u16 di_hi, di;
+	u16 cflag_hi, cflag;
+} RMWORDREGS;
+#else
+typedef struct {
+	u16 ax, ax_hi;
+	u16 bx, bx_hi;
+	u16 cx, cx_hi;
+	u16 dx, dx_hi;
+	u16 si, si_hi;
+	u16 di, di_hi;
+	u16 cflag, cflag_hi;
+} RMWORDREGS;
+#endif
+
+/****************************************************************************
+REMARKS:
+Structure describing the 8-bit x86 CPU registers
+
+HEADER:
+pmapi.h
+
+MEMBERS:
+al      - Value of the AL register
+ah      - Value of the AH register
+bl      - Value of the BL register
+bh      - Value of the BH register
+cl      - Value of the CL register
+ch      - Value of the CH register
+dl      - Value of the DL register
+dh      - Value of the DH register
+****************************************************************************/
+#ifdef __BIG_ENDIAN__
+typedef struct {
+	u16 ax_hi;
+	u8 ah, al;
+	u16 bx_hi;
+	u8 bh, bl;
+	u16 cx_hi;
+	u8 ch, cl;
+	u16 dx_hi;
+	u8 dh, dl;
+} RMBYTEREGS;
+#else
+typedef struct {
+	u8 al;
+	u8 ah;
+	u16 ax_hi;
+	u8 bl;
+	u8 bh;
+	u16 bx_hi;
+	u8 cl;
+	u8 ch;
+	u16 cx_hi;
+	u8 dl;
+	u8 dh;
+	u16 dx_hi;
+} RMBYTEREGS;
+#endif
+
+/****************************************************************************
+REMARKS:
+Structure describing all the x86 CPU registers
+
+HEADER:
+pmapi.h
+
+MEMBERS:
+e   - Member to access registers as 32-bit values
+x   - Member to access registers as 16-bit values
+h   - Member to access registers as 8-bit values
+****************************************************************************/
+typedef union {
+	RMDWORDREGS e;
+	RMWORDREGS x;
+	RMBYTEREGS h;
+} RMREGS;
+
+/****************************************************************************
+REMARKS:
+Structure describing all the x86 segment registers
+
+HEADER:
+pmapi.h
+
+MEMBERS:
+es  - ES segment register
+cs  - CS segment register
+ss  - SS segment register
+ds  - DS segment register
+fs  - FS segment register
+gs  - GS segment register
+****************************************************************************/
+typedef struct {
+	u16 es;
+	u16 cs;
+	u16 ss;
+	u16 ds;
+	u16 fs;
+	u16 gs;
+} RMSREGS;
+
+#endif				/* __KERNEL__ */
+
+#ifndef __KERNEL__
+
+/****************************************************************************
+REMARKS:
+Structure defining all the BIOS Emulator API functions as exported from
+the Binary Portable DLL.
+{secret}
+****************************************************************************/
+typedef struct {
+	ulong dwSize;
+	 ibool(PMAPIP BE_init) (u32 debugFlags, int memSize, BE_VGAInfo * info);
+	void (PMAPIP BE_setVGA) (BE_VGAInfo * info);
+	void (PMAPIP BE_getVGA) (BE_VGAInfo * info);
+	void *(PMAPIP BE_mapRealPointer) (uint r_seg, uint r_off);
+	void *(PMAPIP BE_getVESABuf) (uint * len, uint * rseg, uint * roff);
+	void (PMAPIP BE_callRealMode) (uint seg, uint off, RMREGS * regs,
+				       RMSREGS * sregs);
+	int (PMAPIP BE_int86) (int intno, RMREGS * in, RMREGS * out);
+	int (PMAPIP BE_int86x) (int intno, RMREGS * in, RMREGS * out,
+				RMSREGS * sregs);
+	void *reserved1;
+	void (PMAPIP BE_exit) (void);
+} BE_exports;
+
+/****************************************************************************
+REMARKS:
+Function pointer type for the Binary Portable DLL initialisation entry point.
+{secret}
+****************************************************************************/
+typedef BE_exports *(PMAPIP BE_initLibrary_t) (PM_imports * PMImp);
+#endif
+
+#pragma pack()
+
+/*---------------------------- Global variables ---------------------------*/
+
+#ifdef  __cplusplus
+extern "C" {			/* Use "C" linkage when in C++ mode */
+#endif
+
+/* {secret} Global BIOS emulator system environment */
+	extern BE_sysEnv _BE_env;
+
+/*-------------------------- Function Prototypes --------------------------*/
+
+/* BIOS emulator library entry points */
+	int X86API BE_init(u32 debugFlags, int memSize, BE_VGAInfo * info,
+			   int shared);
+	void X86API BE_setVGA(BE_VGAInfo * info);
+	void X86API BE_getVGA(BE_VGAInfo * info);
+	void X86API BE_setDebugFlags(u32 debugFlags);
+	void *X86API BE_mapRealPointer(uint r_seg, uint r_off);
+	void *X86API BE_getVESABuf(uint * len, uint * rseg, uint * roff);
+	void X86API BE_callRealMode(uint seg, uint off, RMREGS * regs,
+				    RMSREGS * sregs);
+	int X86API BE_int86(int intno, RMREGS * in, RMREGS * out);
+	int X86API BE_int86x(int intno, RMREGS * in, RMREGS * out,
+			     RMSREGS * sregs);
+	void X86API BE_exit(void);
+
+#ifdef  __cplusplus
+}				/* End of "C" linkage for C++       */
+#endif
+#endif				/* __BIOSEMU_H */