diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme136/timer')
| -rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/timer/timer.c | 108 | ||||
| -rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s | 39 |
2 files changed, 0 insertions, 147 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme136/timer/timer.c b/c/src/lib/libbsp/m68k/mvme136/timer/timer.c deleted file mode 100644 index 8c3ecd45f2..0000000000 --- a/c/src/lib/libbsp/m68k/mvme136/timer/timer.c +++ /dev/null @@ -1,108 +0,0 @@ -/* Timer_init() - * - * This routine initializes the Z8036 timer on the MVME136 board. - * - * Input parameters: NONE - * - * Output parameters: NONE - * - * NOTE: This routine will not work if the optimizer is enabled - * for some compilers. The multiple writes to the Z8036 - * may 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 <z8036.h> - -#define TIMER 0xfffb0000 /* address of Z8036 on MVME136 */ - -int Ttimer_val; -rtems_boolean Timer_driver_Find_average_overhead; - -rtems_isr timerisr(); - -void Timer_initialize() -{ - (void) set_vector( timerisr, 66, 0 ); /* install ISR */ - - 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_INTR, 0xe2 ); /* disable lower chain, no vec */ - /* set right justified addr */ - /* and master int enable */ - Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x80 ); /* T1 continuous, and */ - /* cycle/pulse output */ - - *((rtems_unsigned16 *)0xfffb0016) = 0x0000; /* write countdown value */ -/* - Z8x36_WRITE( TIMER, CT1_TIME_CONST_MSB, 0x00 ); - Z8x36_WRITE( TIMER, CT1_TIME_CONST_LSB, 0x00 ); -*/ - Z8x36_WRITE( TIMER, MASTER_CFG, 0xc4 ); /* enable timer1 */ - - Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xc6 ); /* set INTR enable (IE), */ - /* trigger command */ - /* (TCB) and gate */ - /* command (GCB) bits */ - *((rtems_unsigned8 *)0xfffb0038) &= 0xfd; /* enable timer INTR on */ - /* VME controller */ -} - -#define AVG_OVERHEAD 6 /* It typically takes 3.0 microseconds */ - /* (6 countdowns) to start/stop the timer. */ -#define LEAST_VALID 10 /* 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 */ -remaining = 0xffff - *((rtems_unsigned16 *) 0xfffb0010); -/* - 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; -} diff --git a/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s b/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s deleted file mode 100644 index a8f7e7b212..0000000000 --- a/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s +++ /dev/null @@ -1,39 +0,0 @@ -# timer_isr() -# -# This routine provides the ISR for the Z8036 timer on the MVME136 -# board. The timer is set up to generate an interrupt at maximum -# intervals. -# -# Input parameters: NONE -# -# Output parameters: NONE -# -# 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 "asm.h" - -BEGIN_CODE - -.set CT1_CMD_STATUS, 0xfffb000a | port A -.set RELOAD, 0x24 | clr IP & IUS,allow countdown - - PUBLIC (timerisr) -SYM (timerisr): - movl a0,a7@- | save a0 - movl #CT1_CMD_STATUS,a0 | a0 = addr of cmd status reg - movb #RELOAD,a0@ | reload countdown - addql #1, SYM (Ttimer_val) | increment timer value - movl a7@+,a0 | save a0 - rte - -END_CODE -END |