mirror of
https://github.com/AsahiLinux/u-boot
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393 lines
11 KiB
C
393 lines
11 KiB
C
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/****************************************************************************
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*
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* BIOS emulator and interface
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* to Realmode X86 Emulator Library
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*
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* Copyright (C) 1996-1999 SciTech Software, Inc.
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*
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* ========================================================================
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of the authors not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The authors makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: Any
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* Developer: Kendall Bennett
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*
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* Description: Header file for the real mode x86 BIOS emulator, which is
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* used to warmboot any number of VGA compatible PCI/AGP
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* controllers under any OS, on any processor family that
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* supports PCI. We also allow the user application to call
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* real mode BIOS functions and Int 10h functions (including
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* the VESA BIOS).
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*
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****************************************************************************/
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#ifndef __BIOSEMU_H
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#define __BIOSEMU_H
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#ifdef __KERNEL__
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#include "x86emu.h"
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#else
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#include "x86emu.h"
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#include "pmapi.h"
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#include "pcilib.h"
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#endif
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/*---------------------- Macros and type definitions ----------------------*/
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#pragma pack(1)
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#ifndef __KERNEL__
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/****************************************************************************
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REMARKS:
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Data structure used to describe the details specific to a particular VGA
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controller. This information is used to allow the VGA controller to be
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swapped on the fly within the BIOS emulator.
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HEADER:
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biosemu.h
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MEMBERS:
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pciInfo - PCI device information block for the controller
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BIOSImage - Pointer to a read/write copy of the BIOS image
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BIOSImageLen - Length of the BIOS image
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LowMem - Copy of key low memory areas
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****************************************************************************/
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typedef struct {
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PCIDeviceInfo *pciInfo;
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void *BIOSImage;
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ulong BIOSImageLen;
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uchar LowMem[1536];
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} BE_VGAInfo;
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#else
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/****************************************************************************
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REMARKS:
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Data structure used to describe the details for the BIOS emulator system
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environment as used by the X86 emulator library.
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HEADER:
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biosemu.h
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MEMBERS:
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vgaInfo - VGA BIOS information structure
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biosmem_base - Base of the BIOS image
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biosmem_limit - Limit of the BIOS image
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busmem_base - Base of the VGA bus memory
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****************************************************************************/
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typedef struct {
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int function;
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int device;
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int bus;
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u32 VendorID;
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u32 DeviceID;
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pci_dev_t pcidev;
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void *BIOSImage;
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u32 BIOSImageLen;
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u8 LowMem[1536];
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} BE_VGAInfo;
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#endif /* __KERNEL__ */
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#define CRT_C 24 /* 24 CRT Controller Registers */
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#define ATT_C 21 /* 21 Attribute Controller Registers */
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#define GRA_C 9 /* 9 Graphics Controller Registers */
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#define SEQ_C 5 /* 5 Sequencer Registers */
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#define PAL_C 768 /* 768 Palette Registers */
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/****************************************************************************
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REMARKS:
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Data structure used to describe the details for the BIOS emulator system
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environment as used by the X86 emulator library.
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HEADER:
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biosemu.h
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MEMBERS:
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vgaInfo - VGA BIOS information structure
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biosmem_base - Base of the BIOS image
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biosmem_limit - Limit of the BIOS image
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busmem_base - Base of the VGA bus memory
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timer - Timer used to emulate PC timer ports
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timer0 - Latched value for timer 0
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timer0Latched - True if timer 0 value was just latched
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timer2 - Current value for timer 2
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emulateVGA - True to emulate VGA I/O and memory accesses
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****************************************************************************/
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typedef struct {
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BE_VGAInfo vgaInfo;
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ulong biosmem_base;
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ulong biosmem_limit;
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ulong busmem_base;
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u32 timer0;
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int timer0Latched;
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u32 timer1;
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int timer1Latched;
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u32 timer2;
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int timer2Latched;
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int emulateVGA;
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u8 emu61;
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u8 emu70;
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int flipFlop3C0;
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u32 configAddress;
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u8 emu3C0;
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u8 emu3C1[ATT_C];
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u8 emu3C2;
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u8 emu3C4;
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u8 emu3C5[SEQ_C];
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u8 emu3C6;
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uint emu3C7;
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uint emu3C8;
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u8 emu3C9[PAL_C];
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u8 emu3CE;
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u8 emu3CF[GRA_C];
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u8 emu3D4;
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u8 emu3D5[CRT_C];
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u8 emu3DA;
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} BE_sysEnv;
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#ifdef __KERNEL__
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/* Define some types when compiling for the Linux kernel that normally
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* come from the SciTech PM library.
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*/
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/****************************************************************************
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REMARKS:
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Structure describing the 32-bit extended x86 CPU registers
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HEADER:
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pmapi.h
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MEMBERS:
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eax - Value of the EAX register
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ebx - Value of the EBX register
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ecx - Value of the ECX register
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edx - Value of the EDX register
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esi - Value of the ESI register
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edi - Value of the EDI register
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cflag - Value of the carry flag
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****************************************************************************/
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typedef struct {
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u32 eax;
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u32 ebx;
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u32 ecx;
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u32 edx;
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u32 esi;
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u32 edi;
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u32 cflag;
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} RMDWORDREGS;
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/****************************************************************************
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REMARKS:
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Structure describing the 16-bit x86 CPU registers
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HEADER:
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pmapi.h
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MEMBERS:
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ax - Value of the AX register
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bx - Value of the BX register
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cx - Value of the CX register
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dx - Value of the DX register
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si - Value of the SI register
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di - Value of the DI register
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cflag - Value of the carry flag
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****************************************************************************/
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#ifdef __BIG_ENDIAN__
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typedef struct {
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u16 ax_hi, ax;
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u16 bx_hi, bx;
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u16 cx_hi, cx;
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u16 dx_hi, dx;
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u16 si_hi, si;
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u16 di_hi, di;
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u16 cflag_hi, cflag;
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} RMWORDREGS;
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#else
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typedef struct {
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u16 ax, ax_hi;
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u16 bx, bx_hi;
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u16 cx, cx_hi;
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u16 dx, dx_hi;
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u16 si, si_hi;
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u16 di, di_hi;
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u16 cflag, cflag_hi;
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} RMWORDREGS;
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#endif
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/****************************************************************************
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REMARKS:
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Structure describing the 8-bit x86 CPU registers
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HEADER:
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pmapi.h
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MEMBERS:
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al - Value of the AL register
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ah - Value of the AH register
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bl - Value of the BL register
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bh - Value of the BH register
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cl - Value of the CL register
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ch - Value of the CH register
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dl - Value of the DL register
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dh - Value of the DH register
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****************************************************************************/
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#ifdef __BIG_ENDIAN__
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typedef struct {
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u16 ax_hi;
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u8 ah, al;
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u16 bx_hi;
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u8 bh, bl;
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u16 cx_hi;
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u8 ch, cl;
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u16 dx_hi;
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u8 dh, dl;
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} RMBYTEREGS;
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#else
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typedef struct {
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u8 al;
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u8 ah;
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u16 ax_hi;
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u8 bl;
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u8 bh;
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u16 bx_hi;
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u8 cl;
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u8 ch;
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u16 cx_hi;
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u8 dl;
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u8 dh;
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u16 dx_hi;
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} RMBYTEREGS;
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#endif
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/****************************************************************************
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REMARKS:
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Structure describing all the x86 CPU registers
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HEADER:
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pmapi.h
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MEMBERS:
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e - Member to access registers as 32-bit values
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x - Member to access registers as 16-bit values
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h - Member to access registers as 8-bit values
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****************************************************************************/
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typedef union {
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RMDWORDREGS e;
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RMWORDREGS x;
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RMBYTEREGS h;
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} RMREGS;
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/****************************************************************************
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REMARKS:
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Structure describing all the x86 segment registers
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HEADER:
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pmapi.h
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MEMBERS:
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es - ES segment register
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cs - CS segment register
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ss - SS segment register
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ds - DS segment register
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fs - FS segment register
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gs - GS segment register
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****************************************************************************/
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typedef struct {
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u16 es;
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u16 cs;
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u16 ss;
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u16 ds;
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u16 fs;
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u16 gs;
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} RMSREGS;
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#endif /* __KERNEL__ */
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#ifndef __KERNEL__
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/****************************************************************************
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REMARKS:
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Structure defining all the BIOS Emulator API functions as exported from
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the Binary Portable DLL.
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{secret}
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****************************************************************************/
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typedef struct {
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ulong dwSize;
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ibool(PMAPIP BE_init) (u32 debugFlags, int memSize, BE_VGAInfo * info);
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void (PMAPIP BE_setVGA) (BE_VGAInfo * info);
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void (PMAPIP BE_getVGA) (BE_VGAInfo * info);
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void *(PMAPIP BE_mapRealPointer) (uint r_seg, uint r_off);
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void *(PMAPIP BE_getVESABuf) (uint * len, uint * rseg, uint * roff);
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void (PMAPIP BE_callRealMode) (uint seg, uint off, RMREGS * regs,
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RMSREGS * sregs);
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int (PMAPIP BE_int86) (int intno, RMREGS * in, RMREGS * out);
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int (PMAPIP BE_int86x) (int intno, RMREGS * in, RMREGS * out,
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RMSREGS * sregs);
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void *reserved1;
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void (PMAPIP BE_exit) (void);
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} BE_exports;
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/****************************************************************************
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REMARKS:
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Function pointer type for the Binary Portable DLL initialisation entry point.
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{secret}
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****************************************************************************/
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typedef BE_exports *(PMAPIP BE_initLibrary_t) (PM_imports * PMImp);
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#endif
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#pragma pack()
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/*---------------------------- Global variables ---------------------------*/
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#ifdef __cplusplus
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extern "C" { /* Use "C" linkage when in C++ mode */
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#endif
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/* {secret} Global BIOS emulator system environment */
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extern BE_sysEnv _BE_env;
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/*-------------------------- Function Prototypes --------------------------*/
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/* BIOS emulator library entry points */
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int X86API BE_init(u32 debugFlags, int memSize, BE_VGAInfo * info,
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int shared);
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void X86API BE_setVGA(BE_VGAInfo * info);
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void X86API BE_getVGA(BE_VGAInfo * info);
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void X86API BE_setDebugFlags(u32 debugFlags);
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void *X86API BE_mapRealPointer(uint r_seg, uint r_off);
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void *X86API BE_getVESABuf(uint * len, uint * rseg, uint * roff);
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void X86API BE_callRealMode(uint seg, uint off, RMREGS * regs,
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RMSREGS * sregs);
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int X86API BE_int86(int intno, RMREGS * in, RMREGS * out);
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int X86API BE_int86x(int intno, RMREGS * in, RMREGS * out,
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RMSREGS * sregs);
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void X86API BE_exit(void);
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#ifdef __cplusplus
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} /* End of "C" linkage for C++ */
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#endif
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#endif /* __BIOSEMU_H */
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