diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme136/timer')
| -rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/timer/timer.c | 85 | ||||
| -rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/timer/timerisr.S | 36 |
2 files changed, 0 insertions, 121 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 a9bf322162..0000000000 --- a/c/src/lib/libbsp/m68k/mvme136/timer/timer.c +++ /dev/null @@ -1,85 +0,0 @@ -/* - * COPYRIGHT (c) 1989-1999. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems/btimer.h> -#include <bsp.h> -#include <rtems/zilog/z8036.h> - -#define TIMER 0xfffb0000 /* address of Z8036 on MVME136 */ - -int Ttimer_val; -bool benchmark_timer_find_average_overhead; - -rtems_isr timerisr(rtems_vector_number); - -void benchmark_timer_initialize(void) -{ - (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 */ - - *((uint16_t*)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 */ - *((uint8_t*)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 */ - -benchmark_timer_t benchmark_timer_read(void) -{ -/* - uint8_t msb, lsb; -*/ - uint32_t remaining, total; - - Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xce ); /* read the counter value */ -remaining = 0xffff - *((uint16_t*) 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 ( benchmark_timer_find_average_overhead == true ) - return total; /* in one-half microsecond units */ - - else { - if ( total < LEAST_VALID ) - return 0; /* below timer resolution */ - return (total-AVG_OVERHEAD) >> 1; - } -} - -void benchmark_timer_disable_subtracting_average_overhead( - bool find_flag -) -{ - benchmark_timer_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 dda8770c36..0000000000 --- a/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.S +++ /dev/null @@ -1,36 +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) 1989-1999. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems/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 |