diff options
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/common/agplib.c')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/common/agplib.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/common/agplib.c b/board/MAI/bios_emulator/scitech/src/common/agplib.c new file mode 100644 index 0000000000..df8f932fb1 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/common/agplib.c @@ -0,0 +1,220 @@ +/**************************************************************************** +* +* SciTech Nucleus Graphics Architecture +* +* Copyright (C) 1991-1998 SciTech Software, Inc. +* All rights reserved. +* +* ====================================================================== +* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| +* | | +* |This copyrighted computer code contains proprietary technology | +* |owned by SciTech Software, Inc., located at 505 Wall Street, | +* |Chico, CA 95928 USA (http://www.scitechsoft.com). | +* | | +* |The contents of this file are subject to the SciTech Nucleus | +* |License; you may *not* use this file or related software except in | +* |compliance with the License. You may obtain a copy of the License | +* |at http://www.scitechsoft.com/nucleus-license.txt | +* | | +* |Software distributed under the License is distributed on an | +* |"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | +* |implied. See the License for the specific language governing | +* |rights and limitations under the License. | +* | | +* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| +* ====================================================================== +* +* Language: ANSI C +* Environment: Any 32-bit protected mode environment +* +* Description: C module for the Graphics Accelerator Driver API. Uses +* the SciTech PM library for interfacing with DOS +* extender specific functions. +* +****************************************************************************/ + +#include "nucleus/graphics.h" +#include "nucleus/agp.h" + +/*---------------------------- Global Variables ---------------------------*/ + +#ifndef DEBUG_AGP_DRIVER +static AGP_exports _AGP_exports; +static int loaded = false; +static PE_MODULE *hModBPD = NULL; + +static N_imports _N_imports = { + sizeof(N_imports), + _OS_delay, + }; + +static AGP_imports _AGP_imports = { + sizeof(AGP_imports), + }; +#endif + +#include "pmimp.h" + +/*----------------------------- Implementation ----------------------------*/ + +#define DLL_NAME "agp.bpd" + +#ifndef DEBUG_AGP_DRIVER +/**************************************************************************** +REMARKS: +Fatal error handler for non-exported GA_exports. +****************************************************************************/ +static void _AGP_fatalErrorHandler(void) +{ + PM_fatalError("Unsupported AGP export function called! Please upgrade your copy of AGP!\n"); +} + +/**************************************************************************** +PARAMETERS: +shared - True to load the driver into shared memory. + +REMARKS: +Loads the Nucleus binary portable DLL into memory and initilises it. +****************************************************************************/ +static ibool LoadDriver(void) +{ + AGP_initLibrary_t AGP_initLibrary; + AGP_exports *agpExp; + char filename[PM_MAX_PATH]; + char bpdpath[PM_MAX_PATH]; + int i,max; + ulong *p; + + /* Check if we have already loaded the driver */ + if (loaded) + return true; + PM_init(); + + /* Open the BPD file */ + if (!PM_findBPD(DLL_NAME,bpdpath)) + return false; + strcpy(filename,bpdpath); + strcat(filename,DLL_NAME); + if ((hModBPD = PE_loadLibrary(filename,false)) == NULL) + return false; + if ((AGP_initLibrary = (AGP_initLibrary_t)PE_getProcAddress(hModBPD,"_AGP_initLibrary")) == NULL) + return false; + bpdpath[strlen(bpdpath)-1] = 0; + if (strcmp(bpdpath,PM_getNucleusPath()) == 0) + strcpy(bpdpath,PM_getNucleusConfigPath()); + else { + PM_backslash(bpdpath); + strcat(bpdpath,"config"); + } + if ((agpExp = AGP_initLibrary(bpdpath,filename,GA_getSystemPMImports(),&_N_imports,&_AGP_imports)) == NULL) + PM_fatalError("AGP_initLibrary failed!\n"); + _AGP_exports.dwSize = sizeof(_AGP_exports); + max = sizeof(_AGP_exports)/sizeof(AGP_initLibrary_t); + for (i = 0,p = (ulong*)&_AGP_exports; i < max; i++) + *p++ = (ulong)_AGP_fatalErrorHandler; + memcpy(&_AGP_exports,agpExp,MIN(sizeof(_AGP_exports),agpExp->dwSize)); + loaded = true; + return true; +} + +/* The following are stub entry points that the application calls to + * initialise the Nucleus loader library, and we use this to load our + * driver DLL from disk and initialise the library using it. + */ + +/* {secret} */ +int NAPI AGP_status(void) +{ + if (!loaded) + return nDriverNotFound; + return _AGP_exports.AGP_status(); +} + +/* {secret} */ +const char * NAPI AGP_errorMsg( + N_int32 status) +{ + if (!loaded) + return "Unable to load Nucleus device driver!"; + return _AGP_exports.AGP_errorMsg(status); +} + +/* {secret} */ +AGP_devCtx * NAPI AGP_loadDriver(N_int32 deviceIndex) +{ + if (!LoadDriver()) + return NULL; + return _AGP_exports.AGP_loadDriver(deviceIndex); +} + +/* {secret} */ +void NAPI AGP_unloadDriver( + AGP_devCtx *dc) +{ + if (loaded) + _AGP_exports.AGP_unloadDriver(dc); +} + +/* {secret} */ +void NAPI AGP_getGlobalOptions( + AGP_globalOptions *options) +{ + if (LoadDriver()) + _AGP_exports.AGP_getGlobalOptions(options); +} + +/* {secret} */ +void NAPI AGP_setGlobalOptions( + AGP_globalOptions *options) +{ + if (LoadDriver()) + _AGP_exports.AGP_setGlobalOptions(options); +} + +/* {secret} */ +void NAPI AGP_saveGlobalOptions( + AGP_globalOptions *options) +{ + if (loaded) + _AGP_exports.AGP_saveGlobalOptions(options); +} +#endif + +/* {secret} */ +void NAPI _OS_delay8253(N_uint32 microSeconds); + +/**************************************************************************** +REMARKS: +This function delays for the specified number of microseconds +****************************************************************************/ +void NAPI _OS_delay( + N_uint32 microSeconds) +{ + static ibool inited = false; + static ibool haveRDTSC; + LZTimerObject tm; + + if (!inited) { +#ifndef __WIN32_VXD__ + // This has been causing problems in VxD's for some reason, so for now + // we avoid using it. + if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) { + ZTimerInit(); + haveRDTSC = true; + } + else +#endif + haveRDTSC = false; + inited = true; + } + if (haveRDTSC) { + LZTimerOnExt(&tm); + while (LZTimerLapExt(&tm) < microSeconds) + ; + LZTimerOnExt(&tm); + } + else + _OS_delay8253(microSeconds); +} + |
