diff options
Diffstat (limited to 'c/src/lib/libbsp/i960/cvme961/timer/timer.c')
| -rw-r--r-- | c/src/lib/libbsp/i960/cvme961/timer/timer.c | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/c/src/lib/libbsp/i960/cvme961/timer/timer.c b/c/src/lib/libbsp/i960/cvme961/timer/timer.c deleted file mode 100644 index 0a91d12a93..0000000000 --- a/c/src/lib/libbsp/i960/cvme961/timer/timer.c +++ /dev/null @@ -1,107 +0,0 @@ -/* Timer_init() - * - * This routine initializes the Z8536 timer on the SQSIO4 SQUALL - * board for the CVME961 board. The timer is setup to provide a - * tick every 1 millisecond. - * - * Input parameters: NONE - * - * Output parameters: NONE - * - * NOTE: This routine will not work if the optimizer is enabled - * for most compilers. The multiple writes to the Z8536 - * will be optimized away. - * - * It is important that the timer start/stop overhead be - * determined when porting or modifying this code. - * - * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. - * On-Line Applications Research Corporation (OAR). - * All rights assigned to U.S. Government, 1994. - * - * This material may be reproduced by or for the U.S. Government pursuant - * to the copyright license under the clause at DFARS 252.227-7013. This - * notice must appear in all copies of this file and its derivatives. - * - * $Id$ - */ - - -#include <rtems.h> -#include <bsp.h> -#include "z8536.h" - -#define TIMER 0xc00000a0 - -int Ttimer_val; -rtems_boolean Timer_driver_Find_average_overhead; - -void flush_reg(); -rtems_isr timerisr(); - -void Timer_initialize() -{ - set_vector( timerisr, 4, 0 ); /* install ISR */ - - i960_mask_intr( 5 ); /* disable VIC068 tick */ - flush_reg(); /* timed code starts clean */ - Ttimer_val = 0; /* clear timer ISR count */ - Z8x36_WRITE( TIMER, MASTER_INTR, 0x01 ); /* reset */ - Z8x36_WRITE( TIMER, MASTER_INTR, 0x00 ); /* clear reset */ - Z8x36_WRITE( TIMER, MASTER_CFG, 0x00 ); /* disable everything */ - Z8x36_WRITE( TIMER, CNT_TMR_VECTOR, 0x72 ); /* clear intr vector */ - Z8x36_WRITE( TIMER, MASTER_CFG, 0x20 ); /* clear intr info */ - Z8x36_WRITE( TIMER, MASTER_CFG, 0xe0 ); /* disable interrupts */ - Z8x36_WRITE( TIMER, MASTER_CFG, 0x20 ); /* clear intr info */ - Z8x36_WRITE( TIMER, MASTER_CFG, 0xe0 ); /* disable interrupts */ - Z8x36_WRITE( TIMER, MASTER_INTR, 0xe2 ); /* disable lower chain, */ - /* no vector, set right */ - /* justified addr and */ - /* master int enable */ - Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x80 ); /* T1 continuous, and */ - /* cycle/pulse output */ - Z8x36_WRITE( TIMER, CT1_TIME_CONST_MSB, 0x00 ); - Z8x36_WRITE( TIMER, CT1_TIME_CONST_LSB, 0x00 ); - Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xc0 ); /* set INTR enable (IE) */ - Z8x36_WRITE( TIMER, MASTER_CFG, 0x40 ); /* enable timer1 */ - Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x06 ); /* set trigger command */ - /* (TCB) and gate */ - /* command (GCB) bits */ -} - -#define AVG_OVERHEAD 11 /* It typically takes 5.5 microseconds */ - /* (11 countdowns) to start/stop the timer. */ -#define LEAST_VALID 15 /* Don't trust a value lower than this */ - -int Read_timer() -{ - rtems_unsigned8 msb, lsb; - rtems_unsigned32 remaining, total; - - Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xce ); /* read the counter value */ - Z8x36_READ( TIMER, CT1_CUR_CNT_MSB, msb ); - Z8x36_READ( TIMER, CT1_CUR_CNT_LSB, lsb ); - - remaining = 0xffff - ((msb << 8) + lsb); - total = (Ttimer_val * 0x10000) + remaining; - - if ( Timer_driver_Find_average_overhead == 1 ) - return total; /* in one-half microsecond units */ - else { - if ( total < LEAST_VALID ) - return 0; /* below timer resolution */ - return (total-AVG_OVERHEAD) >> 1; - } -} - -rtems_status_code Empty_function( void ) -{ - return RTEMS_SUCCESSFUL; -} - -void Set_find_average_overhead( - rtems_boolean find_flag -) -{ - Timer_driver_Find_average_overhead = find_flag; -} |