diff options
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/biosemu/biosemu.c')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/biosemu/biosemu.c | 445 |
1 files changed, 0 insertions, 445 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/biosemu/biosemu.c b/board/MAI/bios_emulator/scitech/src/biosemu/biosemu.c deleted file mode 100644 index 0052709cc6..0000000000 --- a/board/MAI/bios_emulator/scitech/src/biosemu/biosemu.c +++ /dev/null @@ -1,445 +0,0 @@ -/**************************************************************************** -* -* 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: Module implementing the system specific functions. This -* module is always compiled and linked in the OS depedent -* libraries, and never in a binary portable driver. -* -****************************************************************************/ - -#include "biosemui.h" -#include <string.h> -#include <stdlib.h> - -/*------------------------- Global Variables ------------------------------*/ - -BE_sysEnv _BE_env; -#ifdef __DRIVER__ -PM_imports _VARAPI _PM_imports; -#endif -static X86EMU_memFuncs _BE_mem = { - BE_rdb, - BE_rdw, - BE_rdl, - BE_wrb, - BE_wrw, - BE_wrl, - }; -#ifdef DEBUG -static X86EMU_pioFuncs _BE_pio = { - BE_inb, - BE_inw, - BE_inl, - BE_outb, - BE_outw, - BE_outl, - }; -#else -static X86EMU_pioFuncs _BE_pio = { - (void*)PM_inpb, - (void*)PM_inpw, - (void*)PM_inpd, - (void*)PM_outpb, - (void*)PM_outpw, - (void*)PM_outpd, - }; -#endif - -/*-------------------------- Implementation -------------------------------*/ - -#define OFF(addr) (u16)(((addr) >> 0) & 0xffff) -#define SEG(addr) (u16)(((addr) >> 4) & 0xf000) - -/**************************************************************************** -PARAMETERS: -debugFlags - Flags to enable debugging options (debug builds only) -memSize - Amount of memory to allocate for real mode machine -info - Pointer to default VGA device information - -REMARKS: -This functions initialises the BElib, and uses the passed in -BIOS image as the BIOS that is used and emulated at 0xC0000. -****************************************************************************/ -ibool PMAPI BE_init( - u32 debugFlags, - int memSize, - BE_VGAInfo *info) -{ -#ifndef __DRIVER__ - PM_init(); -#endif - memset(&M,0,sizeof(M)); - if (memSize < 20480) - PM_fatalError("Emulator requires at least 20Kb of memory!\n"); - if ((M.mem_base = (unsigned long)malloc(memSize)) == NULL) - PM_fatalError("Out of memory!"); - M.mem_size = memSize; - _BE_env.busmem_base = (ulong)PM_mapPhysicalAddr(0xA0000,0x5FFFF,true); - M.x86.debug = debugFlags; - _BE_bios_init((u32*)info->LowMem); - X86EMU_setupMemFuncs(&_BE_mem); - X86EMU_setupPioFuncs(&_BE_pio); - BE_setVGA(info); - return true; -} - -/**************************************************************************** -PARAMETERS: -debugFlags - Flags to enable debugging options (debug builds only) - -REMARKS: -This function allows the application to enable logging and debug flags -on a function call basis, so we can specifically enable logging only -for specific functions that are causing problems in debug mode. -****************************************************************************/ -void PMAPI BE_setDebugFlags( - u32 debugFlags) -{ - M.x86.debug = debugFlags; -} - -/**************************************************************************** -PARAMETERS: -info - Pointer to VGA device information to make current - -REMARKS: -This function sets the VGA BIOS functions in the emulator to point to the -specific VGA BIOS in use. This includes swapping the BIOS interrupt -vectors, BIOS image and BIOS data area to the new BIOS. This allows the -real mode BIOS to be swapped without resetting the entire emulator. -****************************************************************************/ -void PMAPI BE_setVGA( - BE_VGAInfo *info) -{ - _BE_env.vgaInfo.pciInfo = info->pciInfo; - _BE_env.vgaInfo.BIOSImage = info->BIOSImage; - if (info->BIOSImage) { - _BE_env.biosmem_base = (ulong)info->BIOSImage; - _BE_env.biosmem_limit = 0xC0000 + info->BIOSImageLen-1; - } - else { - _BE_env.biosmem_base = _BE_env.busmem_base + 0x20000; - _BE_env.biosmem_limit = 0xC7FFF; - } - if (*((u32*)info->LowMem) == 0) - _BE_bios_init((u32*)info->LowMem); - memcpy((u8*)M.mem_base,info->LowMem,sizeof(info->LowMem)); -} - -/**************************************************************************** -PARAMETERS: -info - Pointer to VGA device information to retrieve current - -REMARKS: -This function returns the VGA BIOS functions currently active in the -emulator, so they can be restored at a later date. -****************************************************************************/ -void PMAPI BE_getVGA( - BE_VGAInfo *info) -{ - info->pciInfo = _BE_env.vgaInfo.pciInfo; - info->BIOSImage = _BE_env.vgaInfo.BIOSImage; - memcpy(info->LowMem,(u8*)M.mem_base,sizeof(info->LowMem)); -} - -/**************************************************************************** -PARAMETERS: -r_seg - Segment for pointer to convert -r_off - Offset for pointer to convert - -REMARKS: -This function maps a real mode pointer in the emulator memory to a protected -mode pointer that can be used to directly access the memory. - -NOTE: The memory is *always* in little endian format, son on non-x86 - systems you will need to do endian translations to access this - memory. -****************************************************************************/ -void * PMAPI BE_mapRealPointer( - uint r_seg, - uint r_off) -{ - u32 addr = ((u32)r_seg << 4) + r_off; - - if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) { - return (void*)(_BE_env.biosmem_base + addr - 0xC0000); - } - else if (addr >= 0xA0000 && addr <= 0xFFFFF) { - return (void*)(_BE_env.busmem_base + addr - 0xA0000); - } - return (void*)(M.mem_base + addr); -} - -/**************************************************************************** -PARAMETERS: -len - Return the length of the VESA buffer -rseg - Place to store VESA buffer segment -roff - Place to store VESA buffer offset - -REMARKS: -This function returns the address of the VESA transfer buffer in real -mode emulator memory. The VESA transfer buffer is always 1024 bytes long, -and located at 15Kb into the start of the real mode memory (16Kb is where -we put the real mode code we execute for issuing interrupts). - -NOTE: The memory is *always* in little endian format, son on non-x86 - systems you will need to do endian translations to access this - memory. -****************************************************************************/ -void * PMAPI BE_getVESABuf( - uint *len, - uint *rseg, - uint *roff) -{ - *len = 1024; - *rseg = SEG(0x03C00); - *roff = OFF(0x03C00); - return (void*)(M.mem_base + ((u32)*rseg << 4) + *roff); -} - -/**************************************************************************** -REMARKS: -Cleans up and exits the emulator. -****************************************************************************/ -void PMAPI BE_exit(void) -{ - free((void*)M.mem_base); - PM_freePhysicalAddr((void*)_BE_env.busmem_base,0x5FFFF); -} - -/**************************************************************************** -PARAMETERS: -seg - Segment of code to call -off - Offset of code to call -regs - Real mode registers to load -sregs - Real mode segment registers to load - -REMARKS: -This functions calls a real mode far function at the specified address, -and loads all the x86 registers from the passed in registers structure. -On exit the registers returned from the call are returned in the same -structures. -****************************************************************************/ -void PMAPI BE_callRealMode( - uint seg, - uint off, - RMREGS *regs, - RMSREGS *sregs) -{ - M.x86.R_EAX = regs->e.eax; - M.x86.R_EBX = regs->e.ebx; - M.x86.R_ECX = regs->e.ecx; - M.x86.R_EDX = regs->e.edx; - M.x86.R_ESI = regs->e.esi; - M.x86.R_EDI = regs->e.edi; - M.x86.R_DS = sregs->ds; - M.x86.R_ES = sregs->es; - M.x86.R_FS = sregs->fs; - M.x86.R_GS = sregs->gs; - M.x86.R_CS = (u16)seg; - M.x86.R_IP = (u16)off; - M.x86.R_SS = SEG(M.mem_size - 1); - M.x86.R_SP = OFF(M.mem_size - 1); - X86EMU_exec(); - regs->e.cflag = M.x86.R_EFLG & F_CF; - regs->e.eax = M.x86.R_EAX; - regs->e.ebx = M.x86.R_EBX; - regs->e.ecx = M.x86.R_ECX; - regs->e.edx = M.x86.R_EDX; - regs->e.esi = M.x86.R_ESI; - regs->e.edi = M.x86.R_EDI; - sregs->ds = M.x86.R_DS; - sregs->es = M.x86.R_ES; - sregs->fs = M.x86.R_FS; - sregs->gs = M.x86.R_GS; -} - -/**************************************************************************** -PARAMETERS: -intno - Interrupt number to execute -in - Real mode registers to load -out - Place to store resulting real mode registers - -REMARKS: -This functions calls a real mode interrupt function at the specified address, -and loads all the x86 registers from the passed in registers structure. -On exit the registers returned from the call are returned in out stucture. -****************************************************************************/ -int PMAPI BE_int86( - int intno, - RMREGS *in, - RMREGS *out) -{ - M.x86.R_EAX = in->e.eax; - M.x86.R_EBX = in->e.ebx; - M.x86.R_ECX = in->e.ecx; - M.x86.R_EDX = in->e.edx; - M.x86.R_ESI = in->e.esi; - M.x86.R_EDI = in->e.edi; - ((u8*)M.mem_base)[0x4000] = 0xCD; - ((u8*)M.mem_base)[0x4001] = (u8)intno; - ((u8*)M.mem_base)[0x4002] = 0xC3; - M.x86.R_CS = SEG(0x04000); - M.x86.R_IP = OFF(0x04000); - M.x86.R_SS = SEG(M.mem_size - 1); - M.x86.R_SP = OFF(M.mem_size - 1); - X86EMU_exec(); - out->e.cflag = M.x86.R_EFLG & F_CF; - out->e.eax = M.x86.R_EAX; - out->e.ebx = M.x86.R_EBX; - out->e.ecx = M.x86.R_ECX; - out->e.edx = M.x86.R_EDX; - out->e.esi = M.x86.R_ESI; - out->e.edi = M.x86.R_EDI; - return out->x.ax; -} - -/**************************************************************************** -PARAMETERS: -intno - Interrupt number to execute -in - Real mode registers to load -out - Place to store resulting real mode registers -sregs - Real mode segment registers to load - -REMARKS: -This functions calls a real mode interrupt function at the specified address, -and loads all the x86 registers from the passed in registers structure. -On exit the registers returned from the call are returned in out stucture. -****************************************************************************/ -int PMAPI BE_int86x( - int intno, - RMREGS *in, - RMREGS *out, - RMSREGS *sregs) -{ - M.x86.R_EAX = in->e.eax; - M.x86.R_EBX = in->e.ebx; - M.x86.R_ECX = in->e.ecx; - M.x86.R_EDX = in->e.edx; - M.x86.R_ESI = in->e.esi; - M.x86.R_EDI = in->e.edi; - M.x86.R_DS = sregs->ds; - M.x86.R_ES = sregs->es; - M.x86.R_FS = sregs->fs; - M.x86.R_GS = sregs->gs; - ((u8*)M.mem_base)[0x4000] = 0xCD; - ((u8*)M.mem_base)[0x4001] = (u8)intno; - ((u8*)M.mem_base)[0x4002] = 0xC3; - M.x86.R_CS = SEG(0x04000); - M.x86.R_IP = OFF(0x04000); - M.x86.R_SS = SEG(M.mem_size - 1); - M.x86.R_SP = OFF(M.mem_size - 1); - X86EMU_exec(); - out->e.cflag = M.x86.R_EFLG & F_CF; - out->e.eax = M.x86.R_EAX; - out->e.ebx = M.x86.R_EBX; - out->e.ecx = M.x86.R_ECX; - out->e.edx = M.x86.R_EDX; - out->e.esi = M.x86.R_ESI; - out->e.edi = M.x86.R_EDI; - sregs->ds = M.x86.R_DS; - sregs->es = M.x86.R_ES; - sregs->fs = M.x86.R_FS; - sregs->gs = M.x86.R_GS; - return out->x.ax; -} - -#ifdef __DRIVER__ - -/**************************************************************************** -REMARKS: -Empty log function for binary portable DLL. The BPD is compiled without -debug information, so very little is logged anyway so it is simpler this -way. -****************************************************************************/ -void printk(const char *msg, ...) -{ -} - -/**************************************************************************** -REMARKS: -Fatal error handler called when a non-imported function is called by the -driver. We leave this to a runtime error so that older applications and -shell drivers will work with newer bpd drivers provided no newer functions -are required by the driver itself. If they are, the application or shell -driver needs to be recompiled. -****************************************************************************/ -static void _PM_fatalErrorHandler(void) -{ - PM_fatalError("Unsupported PM_imports import function called! Please re-compile!\n"); -} - -/**************************************************************************** -PARAMETERS: -beImp - BE library imports -beImp - Generic emulator imports - -RETURNS: -Pointer to exported function list - -REMARKS: -This function initialises the BIOS emulator library and returns the list of -loader library exported functions. -{secret} -****************************************************************************/ -BE_exports * _CEXPORT BE_initLibrary( - PM_imports *pmImp) -{ - static BE_exports _BE_exports = { - sizeof(BE_exports), - BE_init, - BE_setVGA, - BE_getVGA, - BE_mapRealPointer, - BE_getVESABuf, - BE_callRealMode, - BE_int86, - BE_int86x, - NULL, - BE_exit, - }; - int i,max; - ulong *p; - - /* Initialize all default imports to point to fatal error handler */ - /* for upwards compatibility. */ - max = sizeof(_PM_imports)/sizeof(BE_initLibrary_t); - for (i = 0,p = (ulong*)&_PM_imports; i < max; i++) - *p++ = (ulong)_PM_fatalErrorHandler; - - /* Now copy all our imported functions */ - memcpy(&_PM_imports,pmImp,MIN(sizeof(_PM_imports),pmImp->dwSize)); - return &_BE_exports; -} - -#endif /* __DRIVER__ */ |
