| /* |
| (C) Copyright IBM Corp. 2008 |
| |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| * Neither the name of IBM nor the names of its contributors may be |
| used to endorse or promote products derived from this software without |
| specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* Internal definitions for SPU timer library. */ |
| #ifndef _SPU_TIMER_INTERNAL_H_ |
| #define _SPU_TIMER_INTERNAL_H_ |
| |
| #include <spu_intrinsics.h> |
| #include <spu_mfcio.h> |
| #include <limits.h> |
| #include <stdlib.h> |
| |
| #ifdef SPU_TIMER_DEBUG |
| #include <stdio.h> |
| #include <assert.h> |
| #endif |
| |
| /* The timer state tells which list its on. */ |
| typedef enum spu_timer_state |
| { |
| SPU_TIMER_FREE = 0, |
| SPU_TIMER_ACTIVE = 1, |
| SPU_TIMER_HANDLED = 2, |
| SPU_TIMER_STOPPED = 3 |
| } spu_timer_state_t; |
| |
| typedef struct spu_timer |
| { |
| int tmout __attribute__ ((aligned (16))); /* Time until expiration (tb). */ |
| int intvl __attribute__ ((aligned (16))); /* Interval. */ |
| int id __attribute__ ((aligned (16))); |
| spu_timer_state_t state __attribute__ ((aligned (16))); |
| void (*func) (int) __attribute__ ((aligned (16))); /* Handler. */ |
| struct spu_timer *next __attribute__ ((aligned (16))); |
| } spu_timer_t; |
| |
| |
| /* Max decrementer value. */ |
| #define DECR_MAX 0xFFFFFFFFU |
| |
| /* Arbitrary non-triggering value. */ |
| #define CLOCK_START_VALUE 0x7FFFFFFF |
| |
| #define MIN_INTVL 1 |
| #define MAX_INTVL INT_MAX |
| |
| /* Timers within 15 tics will expire together. */ |
| #define TIMER_INTERVAL_WINDOW 15 |
| |
| /* Disables the decrementer and returns the saved event mask for a subsequent |
| call to __enable_spu_decr. The decrementer interrupt is acknowledged in the |
| flih when the event is received, but is required also as part of the |
| procedure to stop the decrementer. */ |
| static inline unsigned |
| __disable_spu_decr (void) |
| { |
| unsigned mask = spu_readch (SPU_RdEventMask); |
| spu_writech (SPU_WrEventMask, mask & ~MFC_DECREMENTER_EVENT); |
| spu_writech (SPU_WrEventAck, MFC_DECREMENTER_EVENT); |
| spu_sync_c (); |
| return mask; |
| } |
| |
| /* Writes and enables the decrementer, along with the given event mask. */ |
| static inline void |
| __enable_spu_decr (int val, unsigned mask) |
| { |
| spu_writech (SPU_WrDec, (val)); |
| spu_writech (SPU_WrEventMask, mask | MFC_DECREMENTER_EVENT); |
| spu_sync_c (); |
| } |
| |
| /* These are shared between modules but are not inlined, to save space. */ |
| extern void __spu_timer_start (int id, int reset); |
| extern void __reset_spu_decr (int val); |
| |
| /* The timers. */ |
| extern spu_timer_t __spu_timers[]; |
| |
| /* Active timer list. */ |
| extern spu_timer_t *__spu_timers_active; |
| |
| /* Stopped (allocated) timer list. */ |
| extern spu_timer_t *__spu_timers_stopped; |
| |
| /* List of timers being handled. */ |
| extern spu_timer_t *__spu_timers_handled; |
| |
| /* Bitmask of available timers. */ |
| extern unsigned __spu_timers_avail; |
| |
| /* The software managed timebase value. */ |
| extern volatile uint64_t __spu_tb_val; |
| |
| /* Timeout value of the current interval. */ |
| extern volatile int __spu_tb_timeout; |
| |
| /* Clock start count (clock is running if >0). */ |
| extern volatile unsigned __spu_clock_startcnt; |
| |
| /* Saved interrupt state from clock_start. */ |
| extern volatile unsigned __spu_clock_state_was_enabled; |
| |
| #define __likely(_c) __builtin_expect((_c), 1) |
| #define __unlikely(_c) __builtin_expect((_c), 0) |
| |
| #define ABORT() \ |
| {\ |
| fprintf(stderr, "Internal error, aborting: %s:%d\n", __FILE__, __LINE__);\ |
| assert(0);\ |
| } |
| |
| #endif |