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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/smx/ztimer.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/smx/ztimer.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/smx/ztimer.c b/board/MAI/bios_emulator/scitech/src/pm/smx/ztimer.c new file mode 100644 index 00000000000..01e180bdca4 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/smx/ztimer.c @@ -0,0 +1,115 @@ +/**************************************************************************** +* +* Ultra Long Period Timer +* +* ======================================================================== +* +* The contents of this file are subject to the SciTech MGL Public +* License Version 1.0 (the "License"); you may not use this file +* except in compliance with the License. You may obtain a copy of +* the License at http://www.scitechsoft.com/mgl-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. +* +* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. +* +* The Initial Developer of the Original Code is SciTech Software, Inc. +* All Rights Reserved. +* +* ======================================================================== +* +* Language: ANSI C +* Environment: 32-bit SMX embedded systems development +* +* Description: OS specific implementation for the Zen Timer functions. +* LZTimer not supported for smx (as needed for i486 processors), only +* ULZTimer is supported at this time. +* +****************************************************************************/ + +/*---------------------------- Global smx variables -----------------------*/ + +extern ulong _cdecl etime; /* elapsed time */ +extern ulong _cdecl xticks_per_second(void); + +/*----------------------------- Implementation ----------------------------*/ + +/* External assembler functions */ + +void _ASMAPI LZ_disable(void); +void _ASMAPI LZ_enable(void); + + +/**************************************************************************** +REMARKS: +Initialise the Zen Timer module internals. +****************************************************************************/ +void __ZTimerInit(void) +{ +} + +ulong reterr(void) +{ + PM_fatalError("Zen Timer not supported for smx."); + return(0); +} + +/**************************************************************************** +REMARKS: +Call the assembler Zen Timer functions to do the timing. +****************************************************************************/ +#define __LZTimerOn(tm) PM_fatalError("Zen Timer not supported for smx.") + +/**************************************************************************** +REMARKS: +Call the assembler Zen Timer functions to do the timing. +****************************************************************************/ +#define __LZTimerLap(tm) reterr() + +/**************************************************************************** +REMARKS: +Call the assembler Zen Timer functions to do the timing. +****************************************************************************/ +#define __LZTimerOff(tm) PM_fatalError("Zen Timer not supported for smx.") + +/**************************************************************************** +REMARKS: +Call the assembler Zen Timer functions to do the timing. +****************************************************************************/ +#define __LZTimerCount(tm) reterr() + +/**************************************************************************** +REMARKS: +Define the resolution of the long period timer as seconds per timer tick. +****************************************************************************/ +#define ULZTIMER_RESOLUTION (ulong)(1000000/xticks_per_second()) + +/**************************************************************************** +REMARKS: +Read the Long Period timer value from the smx timer tick. +****************************************************************************/ +static ulong __ULZReadTime(void) +{ + ulong ticks; + LZ_disable(); /* Turn of interrupts */ + ticks = etime; + LZ_enable(); /* Turn on interrupts again */ + return ticks; +} + +/**************************************************************************** +REMARKS: +Compute the elapsed time from the BIOS timer tick. Note that we check to see +whether a midnight boundary has passed, and if so adjust the finish time to +account for this. We cannot detect if more that one midnight boundary has +passed, so if this happens we will be generating erronous results. +****************************************************************************/ +ulong __ULZElapsedTime(ulong start,ulong finish) +{ + if (finish < start) + finish += xticks_per_second() * 3600 *24; /* Number of ticks in 24 hours */ + return finish - start; +} |