From ece92f85053b8df613edcf05b26a416cbc3d629c Mon Sep 17 00:00:00 2001 From: Jason Jin Date: Fri, 6 Jul 2007 08:34:56 +0800 Subject: 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 --- drivers/bios_emulator/x86emu/sys.c | 322 +++++++++++++++++++++++++++++++++++++ 1 file changed, 322 insertions(+) create mode 100644 drivers/bios_emulator/x86emu/sys.c (limited to 'drivers/bios_emulator/x86emu/sys.c') diff --git a/drivers/bios_emulator/x86emu/sys.c b/drivers/bios_emulator/x86emu/sys.c new file mode 100644 index 000000000..bb7fcd93a --- /dev/null +++ b/drivers/bios_emulator/x86emu/sys.c @@ -0,0 +1,322 @@ +/**************************************************************************** +* +* 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: This file includes subroutines which are related to +* programmed I/O and memory access. Included in this module +* are default functions that do nothing. For real uses these +* functions will have to be overriden by the user library. +* +****************************************************************************/ + +#include "x86emu/x86emui.h" + +/*------------------------- Global Variables ------------------------------*/ + +X86EMU_sysEnv _X86EMU_env; /* Global emulator machine state */ +X86EMU_intrFuncs _X86EMU_intrTab[256]; + +int debug_intr; + +/*----------------------------- Implementation ----------------------------*/ + +/**************************************************************************** +PARAMETERS: +addr - Emulator memory address to read + +RETURNS: +Byte value read from emulator memory. + +REMARKS: +Reads a byte value from the emulator memory. +****************************************************************************/ +u8 X86API rdb(u32 addr) +{ + return 0; +} + +/**************************************************************************** +PARAMETERS: +addr - Emulator memory address to read + +RETURNS: +Word value read from emulator memory. + +REMARKS: +Reads a word value from the emulator memory. +****************************************************************************/ +u16 X86API rdw(u32 addr) +{ + return 0; +} + +/**************************************************************************** +PARAMETERS: +addr - Emulator memory address to read + +RETURNS: +Long value read from emulator memory. +REMARKS: +Reads a long value from the emulator memory. +****************************************************************************/ +u32 X86API rdl(u32 addr) +{ + return 0; +} + +/**************************************************************************** +PARAMETERS: +addr - Emulator memory address to read +val - Value to store + +REMARKS: +Writes a byte value to emulator memory. +****************************************************************************/ +void X86API wrb(u32 addr, u8 val) +{ +} + +/**************************************************************************** +PARAMETERS: +addr - Emulator memory address to read +val - Value to store + +REMARKS: +Writes a word value to emulator memory. +****************************************************************************/ +void X86API wrw(u32 addr, u16 val) +{ +} + +/**************************************************************************** +PARAMETERS: +addr - Emulator memory address to read +val - Value to store + +REMARKS: +Writes a long value to emulator memory. +****************************************************************************/ +void X86API wrl(u32 addr, u32 val) +{ +} + +/**************************************************************************** +PARAMETERS: +addr - PIO address to read +RETURN: +0 +REMARKS: +Default PIO byte read function. Doesn't perform real inb. +****************************************************************************/ +static u8 X86API p_inb(X86EMU_pioAddr addr) +{ + DB(if (DEBUG_IO_TRACE()) + printk("inb %#04x \n", addr);) + return 0; +} + +/**************************************************************************** +PARAMETERS: +addr - PIO address to read +RETURN: +0 +REMARKS: +Default PIO word read function. Doesn't perform real inw. +****************************************************************************/ +static u16 X86API p_inw(X86EMU_pioAddr addr) +{ + DB(if (DEBUG_IO_TRACE()) + printk("inw %#04x \n", addr);) + return 0; +} + +/**************************************************************************** +PARAMETERS: +addr - PIO address to read +RETURN: +0 +REMARKS: +Default PIO long read function. Doesn't perform real inl. +****************************************************************************/ +static u32 X86API p_inl(X86EMU_pioAddr addr) +{ + DB(if (DEBUG_IO_TRACE()) + printk("inl %#04x \n", addr);) + return 0; +} + +/**************************************************************************** +PARAMETERS: +addr - PIO address to write +val - Value to store +REMARKS: +Default PIO byte write function. Doesn't perform real outb. +****************************************************************************/ +static void X86API p_outb(X86EMU_pioAddr addr, u8 val) +{ + DB(if (DEBUG_IO_TRACE()) + printk("outb %#02x -> %#04x \n", val, addr);) + return; +} + +/**************************************************************************** +PARAMETERS: +addr - PIO address to write +val - Value to store +REMARKS: +Default PIO word write function. Doesn't perform real outw. +****************************************************************************/ +static void X86API p_outw(X86EMU_pioAddr addr, u16 val) +{ + DB(if (DEBUG_IO_TRACE()) + printk("outw %#04x -> %#04x \n", val, addr);) + return; +} + +/**************************************************************************** +PARAMETERS: +addr - PIO address to write +val - Value to store +REMARKS: +Default PIO ;ong write function. Doesn't perform real outl. +****************************************************************************/ +static void X86API p_outl(X86EMU_pioAddr addr, u32 val) +{ + DB(if (DEBUG_IO_TRACE()) + printk("outl %#08x -> %#04x \n", val, addr);) + return; +} + +/*------------------------- Global Variables ------------------------------*/ + +u8(X86APIP sys_rdb) (u32 addr) = rdb; +u16(X86APIP sys_rdw) (u32 addr) = rdw; +u32(X86APIP sys_rdl) (u32 addr) = rdl; +void (X86APIP sys_wrb) (u32 addr, u8 val) = wrb; +void (X86APIP sys_wrw) (u32 addr, u16 val) = wrw; +void (X86APIP sys_wrl) (u32 addr, u32 val) = wrl; +u8(X86APIP sys_inb) (X86EMU_pioAddr addr) = p_inb; +u16(X86APIP sys_inw) (X86EMU_pioAddr addr) = p_inw; +u32(X86APIP sys_inl) (X86EMU_pioAddr addr) = p_inl; +void (X86APIP sys_outb) (X86EMU_pioAddr addr, u8 val) = p_outb; +void (X86APIP sys_outw) (X86EMU_pioAddr addr, u16 val) = p_outw; +void (X86APIP sys_outl) (X86EMU_pioAddr addr, u32 val) = p_outl; + +/*----------------------------- Setup -------------------------------------*/ + +/**************************************************************************** +PARAMETERS: +funcs - New memory function pointers to make active + +REMARKS: +This function is used to set the pointers to functions which access +memory space, allowing the user application to override these functions +and hook them out as necessary for their application. +****************************************************************************/ +void X86EMU_setupMemFuncs(X86EMU_memFuncs * funcs) +{ + sys_rdb = funcs->rdb; + sys_rdw = funcs->rdw; + sys_rdl = funcs->rdl; + sys_wrb = funcs->wrb; + sys_wrw = funcs->wrw; + sys_wrl = funcs->wrl; +} + +/**************************************************************************** +PARAMETERS: +funcs - New programmed I/O function pointers to make active + +REMARKS: +This function is used to set the pointers to functions which access +I/O space, allowing the user application to override these functions +and hook them out as necessary for their application. +****************************************************************************/ +void X86EMU_setupPioFuncs(X86EMU_pioFuncs * funcs) +{ + sys_inb = funcs->inb; + sys_inw = funcs->inw; + sys_inl = funcs->inl; + sys_outb = funcs->outb; + sys_outw = funcs->outw; + sys_outl = funcs->outl; +} + +/**************************************************************************** +PARAMETERS: +funcs - New interrupt vector table to make active + +REMARKS: +This function is used to set the pointers to functions which handle +interrupt processing in the emulator, allowing the user application to +hook interrupts as necessary for their application. Any interrupts that +are not hooked by the user application, and reflected and handled internally +in the emulator via the interrupt vector table. This allows the application +to get control when the code being emulated executes specific software +interrupts. +****************************************************************************/ +void X86EMU_setupIntrFuncs(X86EMU_intrFuncs funcs[]) +{ + int i; + + for (i = 0; i < 256; i++) + _X86EMU_intrTab[i] = NULL; + if (funcs) { + for (i = 0; i < 256; i++) + _X86EMU_intrTab[i] = funcs[i]; + } +} + +/**************************************************************************** +PARAMETERS: +int - New software interrupt to prepare for + +REMARKS: +This function is used to set up the emulator state to exceute a software +interrupt. This can be used by the user application code to allow an +interrupt to be hooked, examined and then reflected back to the emulator +so that the code in the emulator will continue processing the software +interrupt as per normal. This essentially allows system code to actively +hook and handle certain software interrupts as necessary. +****************************************************************************/ +void X86EMU_prepareForInt(int num) +{ + push_word((u16) M.x86.R_FLG); + CLEAR_FLAG(F_IF); + CLEAR_FLAG(F_TF); + push_word(M.x86.R_CS); + M.x86.R_CS = mem_access_word(num * 4 + 2); + push_word(M.x86.R_IP); + M.x86.R_IP = mem_access_word(num * 4); + M.x86.intr = 0; +} -- cgit v1.2.3-70-g09d2 From ce981dc857adfc8036ca2f6d5d5a06c2a8aa77d6 Mon Sep 17 00:00:00 2001 From: Jason Jin Date: Wed, 8 Aug 2007 08:33:11 +0800 Subject: Add CONFIG_BIOSEMU define to guard all the bios emulator code Signed-off-by: Jason Jin This patch fix the compile issue on the board that did not enable the bios emulator --- drivers/bios_emulator/besys.c | 2 ++ drivers/bios_emulator/bios.c | 2 ++ drivers/bios_emulator/biosemu.c | 3 +++ drivers/bios_emulator/x86emu/debug.c | 4 ++++ drivers/bios_emulator/x86emu/decode.c | 4 ++++ drivers/bios_emulator/x86emu/ops.c | 5 +++++ drivers/bios_emulator/x86emu/ops2.c | 4 ++++ drivers/bios_emulator/x86emu/prim_ops.c | 4 ++++ drivers/bios_emulator/x86emu/sys.c | 4 ++++ 9 files changed, 32 insertions(+) (limited to 'drivers/bios_emulator/x86emu/sys.c') diff --git a/drivers/bios_emulator/besys.c b/drivers/bios_emulator/besys.c index 2a8e1a01c..4c4bc8d7b 100644 --- a/drivers/bios_emulator/besys.c +++ b/drivers/bios_emulator/besys.c @@ -49,6 +49,7 @@ #include "biosemui.h" +#if defined(CONFIG_BIOSEMU) /*------------------------- Global Variables ------------------------------*/ #ifndef __i386__ @@ -717,3 +718,4 @@ void X86API BE_outl(X86EMU_pioAddr port, u32 val) #endif LOG_outpd(port, val); } +#endif diff --git a/drivers/bios_emulator/bios.c b/drivers/bios_emulator/bios.c index ed5437eec..7aa1bfb2e 100644 --- a/drivers/bios_emulator/bios.c +++ b/drivers/bios_emulator/bios.c @@ -43,6 +43,7 @@ #include "biosemui.h" +#if defined(CONFIG_BIOSEMU) /*----------------------------- Implementation ----------------------------*/ /**************************************************************************** @@ -319,3 +320,4 @@ void _BE_bios_init(u32 * intrTab) bios_intr_tab[0x6D] = int10; X86EMU_setupIntrFuncs(bios_intr_tab); } +#endif diff --git a/drivers/bios_emulator/biosemu.c b/drivers/bios_emulator/biosemu.c index 06d4ad380..4c3aedf41 100644 --- a/drivers/bios_emulator/biosemu.c +++ b/drivers/bios_emulator/biosemu.c @@ -48,6 +48,8 @@ #include "biosemui.h" #include +#if defined(CONFIG_BIOSEMU) + BE_sysEnv _BE_env = {{0}}; static X86EMU_memFuncs _BE_mem __attribute__((section(".got2"))) = { BE_rdb, @@ -368,3 +370,4 @@ int X86API BE_int86x(int intno, RMREGS * in, RMREGS * out, RMSREGS * sregs) sregs->gs = M.x86.R_GS; return out->x.ax; } +#endif diff --git a/drivers/bios_emulator/x86emu/debug.c b/drivers/bios_emulator/x86emu/debug.c index 0f58a6963..915739c5b 100644 --- a/drivers/bios_emulator/x86emu/debug.c +++ b/drivers/bios_emulator/x86emu/debug.c @@ -40,6 +40,8 @@ #include "x86emu/x86emui.h" #include +#if defined(CONFIG_BIOSEMU) + /*----------------------------- Implementation ----------------------------*/ #ifdef DEBUG @@ -459,3 +461,5 @@ void x86emu_dump_xregs(void) printk("NC "); printk("\n"); } + +#endif diff --git a/drivers/bios_emulator/x86emu/decode.c b/drivers/bios_emulator/x86emu/decode.c index 1e2dcfe4b..879f0a06d 100644 --- a/drivers/bios_emulator/x86emu/decode.c +++ b/drivers/bios_emulator/x86emu/decode.c @@ -39,6 +39,8 @@ #include "x86emu/x86emui.h" +#if defined(CONFIG_BIOSEMU) + /*----------------------------- Implementation ----------------------------*/ /**************************************************************************** @@ -1142,3 +1144,5 @@ unsigned decode_rmXX_address(int mod, int rm) return decode_rm01_address(rm); return decode_rm10_address(rm); } + +#endif diff --git a/drivers/bios_emulator/x86emu/ops.c b/drivers/bios_emulator/x86emu/ops.c index d1380ceec..d334fb5b1 100644 --- a/drivers/bios_emulator/x86emu/ops.c +++ b/drivers/bios_emulator/x86emu/ops.c @@ -76,6 +76,9 @@ ****************************************************************************/ #include "x86emu/x86emui.h" + +#if defined(CONFIG_BIOSEMU) + /*----------------------------- Implementation ----------------------------*/ /* constant arrays to do several instructions in just one function */ @@ -5429,3 +5432,5 @@ void (*x86emu_optab[256])(u8) __attribute__ ((section(".got2"))) = /* 0xfe */ x86emuOp_opcFE_byte_RM, /* 0xff */ x86emuOp_opcFF_word_RM, }; + +#endif diff --git a/drivers/bios_emulator/x86emu/ops2.c b/drivers/bios_emulator/x86emu/ops2.c index 631a340ed..81c0d49a3 100644 --- a/drivers/bios_emulator/x86emu/ops2.c +++ b/drivers/bios_emulator/x86emu/ops2.c @@ -46,6 +46,8 @@ #include "x86emu/x86emui.h" +#if defined(CONFIG_BIOSEMU) + /*----------------------------- Implementation ----------------------------*/ /**************************************************************************** @@ -1768,3 +1770,5 @@ void (*x86emu_optab2[256])(u8) __attribute__((section(".got2"))) = /* 0xfe */ x86emuOp2_illegal_op, /* 0xff */ x86emuOp2_illegal_op, }; + +#endif diff --git a/drivers/bios_emulator/x86emu/prim_ops.c b/drivers/bios_emulator/x86emu/prim_ops.c index e0827d747..c1152eae3 100644 --- a/drivers/bios_emulator/x86emu/prim_ops.c +++ b/drivers/bios_emulator/x86emu/prim_ops.c @@ -100,6 +100,8 @@ #define PRIM_OPS_NO_REDEFINE_ASM #include "x86emu/x86emui.h" +#if defined(CONFIG_BIOSEMU) + /*------------------------- Global Variables ------------------------------*/ static u32 x86emu_parity_tab[8] = @@ -2443,3 +2445,5 @@ DB( if (CHECK_SP_ACCESS()) M.x86.R_SP += 4; return res; } + +#endif diff --git a/drivers/bios_emulator/x86emu/sys.c b/drivers/bios_emulator/x86emu/sys.c index bb7fcd93a..566389f58 100644 --- a/drivers/bios_emulator/x86emu/sys.c +++ b/drivers/bios_emulator/x86emu/sys.c @@ -41,6 +41,8 @@ #include "x86emu/x86emui.h" +#if defined(CONFIG_BIOSEMU) + /*------------------------- Global Variables ------------------------------*/ X86EMU_sysEnv _X86EMU_env; /* Global emulator machine state */ @@ -320,3 +322,5 @@ void X86EMU_prepareForInt(int num) M.x86.R_IP = mem_access_word(num * 4); M.x86.intr = 0; } + +#endif -- cgit v1.2.3-70-g09d2