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Diffstat (limited to 'arch/metag/tbx/tbitimer.S')
| -rw-r--r-- | arch/metag/tbx/tbitimer.S | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/arch/metag/tbx/tbitimer.S b/arch/metag/tbx/tbitimer.S deleted file mode 100644 index 5dbedde..0000000 --- a/arch/metag/tbx/tbitimer.S +++ /dev/null @@ -1,207 +0,0 @@ -/* - * tbitimer.S - * - * Copyright (C) 2001, 2002, 2007, 2012 Imagination Technologies. - * - * This program is free software; you can redistribute it and/or modify it under - * the terms of the GNU General Public License version 2 as published by the - * Free Software Foundation. - * - * TBI timer support routines and data values - */ - - .file "tbitimer.S" -/* - * Get data structures and defines from the main C header - */ -#include <asm/tbx.h> - - .data - .balign 8 - .global ___TBITimeB - .type ___TBITimeB,object -___TBITimeB: - .quad 0 /* Background 'lost' ticks */ - .size ___TBITimeB,.-___TBITimeB - - .data - .balign 8 - .global ___TBITimeI - .type ___TBITimeI,object -___TBITimeI: - .quad 0 /* Interrupt 'lost' ticks */ - .size ___TBITimeI,.-___TBITimeI - - .data - .balign 8 - .global ___TBITimes - .type ___TBITimes,object -___TBITimes: - .long ___TBITimeB /* Table of 'lost' tick values */ - .long ___TBITimeI - .size ___TBITimes,.-___TBITimes - -/* - * Flag bits for control of ___TBITimeCore - */ -#define TIMER_SET_BIT 1 -#define TIMER_ADD_BIT 2 - -/* - * Initialise or stop timer support - * - * Register Usage: D1Ar1 holds Id, D1Ar2 is initial delay or 0 - * D0FrT is used to call ___TBITimeCore - * D0Re0 is used for the result which is TXSTAT_TIMER_BIT - * D0Ar4, D1Ar5, D0Ar6 are all used as scratch - * Other registers are those set by ___TBITimeCore - * A0.3 is assumed to point at ___TBITime(I/B) - */ - .text - .balign 4 - .global ___TBITimerCtrl - .type ___TBITimerCtrl,function -___TBITimerCtrl: - MOV D1Ar5,#TIMER_SET_BIT /* Timer SET request */ - MOVT D0FrT,#HI(___TBITimeCore) /* Get timer core reg values */ - CALL D0FrT,#LO(___TBITimeCore) /* and perform register update */ - NEGS D0Ar6,D0Ar2 /* Set flags from time-stamp */ - ASR D1Ar5,D0Ar6,#31 /* Sign extend D0Ar6 into D1Ar5 */ - SETLNZ [A0.3],D0Ar6,D1Ar5 /* ___TBITime(B/I)=-Start if enable */ - MOV PC,D1RtP /* Return */ - .size ___TBITimerCtrl,.-___TBITimerCtrl - -/* - * Return ___TBITimeStamp value - * - * Register Usage: D1Ar1 holds Id - * D0FrT is used to call ___TBITimeCore - * D0Re0, D1Re0 is used for the result - * D1Ar3, D0Ar4, D1Ar5 - * Other registers are those set by ___TBITimeCore - * D0Ar6 is assumed to be the timer value read - * A0.3 is assumed to point at ___TBITime(I/B) - */ - .text - .balign 4 - .global ___TBITimeStamp - .type ___TBITimeStamp,function -___TBITimeStamp: - MOV D1Ar5,#0 /* Timer GET request */ - MOVT D0FrT,#HI(___TBITimeCore) /* Get timer core reg values */ - CALL D0FrT,#LO(___TBITimeCore) /* with no register update */ - ADDS D0Re0,D0Ar4,D0Ar6 /* Add current time value */ - ADD D1Re0,D1Ar3,D1Ar5 /* to 64-bit signed extend time */ - ADDCS D1Re0,D1Re0,#1 /* Support borrow too */ - MOV PC,D1RtP /* Return */ - .size ___TBITimeStamp,.-___TBITimeStamp - -/* - * Perform ___TBITimerAdd logic - * - * Register Usage: D1Ar1 holds Id, D0Ar2 holds value to be added to the timer - * D0Re0 is used for the result - new TIMER value - * D1Ar5, D0Ar6 are used as scratch - * Other registers are those set by ___TBITimeCore - * D0Ar6 is assumed to be the timer value read - * D0Ar4, D1Ar3 is the current value of ___TBITime(B/I) - */ - .text - .balign 4 - .global ___TBITimerAdd - .type ___TBITimerAdd,function -___TBITimerAdd: - MOV D1Ar5,#TIMER_ADD_BIT /* Timer ADD request */ - MOVT D0FrT,#HI(___TBITimeCore) /* Get timer core reg values */ - CALL D0FrT,#LO(___TBITimeCore) /* with no register update */ - ADD D0Re0,D0Ar2,D0Ar6 /* Regenerate new value = result */ - NEG D0Ar2,D0Ar2 /* Negate delta */ - ASR D1Re0,D0Ar2,#31 /* Sign extend negated delta */ - ADDS D0Ar4,D0Ar4,D0Ar2 /* Add time added to ... */ - ADD D1Ar3,D1Ar3,D1Re0 /* ... real timer ... */ - ADDCS D1Ar3,D1Ar3,#1 /* ... with carry */ - SETL [A0.3],D0Ar4,D1Ar3 /* Update ___TBITime(B/I) */ - MOV PC,D1RtP /* Return */ - .size ___TBITimerAdd,.-___TBITimerAdd - -#ifdef TBI_1_4 -/* - * Perform ___TBITimerDeadline logic - * NB: Delays are positive compared to the Wait values which are -ive - * - * Register Usage: D1Ar1 holds Id - * D0Ar2 holds Delay requested - * D0Re0 is used for the result - old TIMER Delay value - * D1Ar5, D0Ar6 are used as scratch - * Other registers are those set by ___TBITimeCore - * D0Ar6 is assumed to be the timer value read - * D0Ar4, D1Ar3 is the current value of ___TBITime(B/I) - * - */ - .text - .type ___TBITimerDeadline,function - .global ___TBITimerDeadline - .align 2 -___TBITimerDeadline: - MOV D1Ar5,#TIMER_SET_BIT /* Timer SET request */ - MOVT D0FrT,#HI(___TBITimeCore) /* Get timer core reg values */ - CALL D0FrT,#LO(___TBITimeCore) /* with no register update */ - MOV D0Re0,D0Ar6 /* Old value read = result */ - SUB D0Ar2,D0Ar6,D0Ar2 /* Delta from (old - new) */ - ASR D1Re0,D0Ar2,#31 /* Sign extend delta */ - ADDS D0Ar4,D0Ar4,D0Ar2 /* Add time added to ... */ - ADD D1Ar3,D1Ar3,D1Re0 /* ... real timer ... */ - ADDCS D1Ar3,D1Ar3,#1 /* ... with carry */ - SETL [A0.3],D0Ar4,D1Ar3 /* Update ___TBITime(B/I) */ - MOV PC,D1RtP /* Return */ - .size ___TBITimerDeadline,.-___TBITimerDeadline -#endif /* TBI_1_4 */ - -/* - * Perform core timer access logic - * - * Register Usage: D1Ar1 holds Id, D0Ar2 holds input value for SET and - * input value for ADD - * D1Ar5 controls op as SET or ADD as bit values - * On return D0Ar6, D1Ar5 holds the old 64-bit timer value - * A0.3 is setup to point at ___TBITime(I/B) - * A1.3 is setup to point at ___TBITimes - * D0Ar4, D1Ar3 is setup to value of ___TBITime(I/B) - */ - .text - .balign 4 - .global ___TBITimeCore - .type ___TBITimeCore,function -___TBITimeCore: -#ifndef METAC_0_1 - TSTT D1Ar1,#HI(TBID_ISTAT_BIT) /* Interrupt level timer? */ -#endif - MOVT A1LbP,#HI(___TBITimes) - ADD A1LbP,A1LbP,#LO(___TBITimes) - MOV A1.3,A1LbP /* Get ___TBITimes address */ -#ifndef METAC_0_1 - BNZ $LTimeCoreI /* Yes: Service TXTIMERI! */ -#endif - LSRS D1Ar5,D1Ar5,#1 /* Carry = SET, Zero = !ADD */ - GETD A0.3,[A1.3+#0] /* A0.3 == &___TBITimeB */ - MOV D0Ar6,TXTIMER /* Always GET old value */ - MOVCS TXTIMER,D0Ar2 /* Conditional SET operation */ - ADDNZ TXTIMER,D0Ar2,D0Ar6 /* Conditional ADD operation */ -#ifndef METAC_0_1 - B $LTimeCoreEnd -$LTimeCoreI: - LSRS D1Ar5,D1Ar5,#1 /* Carry = SET, Zero = !ADD */ - GETD A0.3,[A1.3+#4] /* A0.3 == &___TBITimeI */ - MOV D0Ar6,TXTIMERI /* Always GET old value */ - MOVCS TXTIMERI,D0Ar2 /* Conditional SET operation */ - ADDNZ TXTIMERI,D0Ar2,D0Ar6 /* Conditional ADD operation */ -$LTimeCoreEnd: -#endif - ASR D1Ar5,D0Ar6,#31 /* Sign extend D0Ar6 into D1Ar5 */ - GETL D0Ar4,D1Ar3,[A0.3] /* Read ___TBITime(B/I) */ - MOV PC,D0FrT /* Return quickly */ - .size ___TBITimeCore,.-___TBITimeCore - -/* - * End of tbitimer.S - */ |
