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  • This comparison shows the changes necessary to convert path 
    /openrisc/trunk/rtos/rtems/c/src/lib/libbsp/i960/rxgen960/timer
    from Rev 30 to Rev 173
    ↔ Reverse comparison
  •

Rev 30 → Rev 173

/timerisr.S
0,0 → 1,65
/* timer_isr()
*
* This routine initializes the Z8536 timer on the SQSIO4 SQUALL
* board for the CVME961 board. The timer is setup to provide a
* tick every 0x10000 / 2 milliseconds. This is used to time
* executing code.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id: timerisr.S,v 1.2 2001-09-27 12:00:00 chris Exp $
*/
 
#include "asm.h"
 
.set PORT_A, 0xc00000a8 # port A
.set PORT_B, 0xc00000a4 # port B
.set PORT_C, 0xc00000a0 # port C
.set CTL_PORT, 0xc00000ac # control port
 
.set T1CSR, 0x0a # T1 command/status reg
.set RELOAD, 0x24 # clr IP & IUS,allow countdown
 
/*
* Duplicating this symbol is stupid but eliminates
* toolset variation problems.
*/
PUBLIC(timerisr)
PUBLIC(_timerisr)
SYM (timerisr):
SYM (_timerisr):
#ldconst 1,r4
#modpc 0,r4,r4 # enable tracing
 
ld _Ttimer_val,r6 # r6 = test timer
 
ldconst T1CSR,r4 # r4 = T1 control status reg
stob r4,CTL_PORT # select T1CSR
ldconst RELOAD,r5 # r5 = reset value
stob r5,CTL_PORT # reset countdown
addo 1,r6,r6
st r6,_Ttimer_val # increment test timer
loop_til_cleared:
/* clrbit 4,sf0,sf0 XXX JRS */
/* bbs 4,sf0,loop_til_cleared XXX JRS */
leaf: ret
 
.leafproc _flush_reg, flush_reg.lf
.globl _flush_reg, flush_reg.lf
_flush_reg:
lda leaf,g14 # g14 = exit address
flush_reg.lf:
flushreg
mov g14,g0 # g0 = exit address
ldconst 0,g14 # set g14 for non-leaf
bx (g0)
/timer.c
0,0 → 1,133
/* 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) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id: timer.c,v 1.2 2001-09-27 12:00:00 chris Exp $
*/
 
 
#include <rtems.h>
#include <bsp.h>
#include <stdlib.h>
#include <i960RP.h>
#include <rtems/libio.h>
 
 
#define TIMER_VECTOR 34
 
int Ttimer_val;
rtems_boolean Timer_driver_Find_average_overhead = 0;
 
void flush_reg();
rtems_isr timerisr();
 
void Timer_initialize()
{
volatile unsigned int *tmr1 = (unsigned int *) TMR1_ADDR;
volatile unsigned int *trr1 = (unsigned int *) TRR1_ADDR;
volatile unsigned int *tcr1 = (unsigned int *) TCR1_ADDR;
volatile unsigned int *imsk = (unsigned int *) IMSK_ADDR;
volatile unsigned int *icon = (unsigned int *) ICON_ADDR;
volatile unsigned int *ipnd = (unsigned int *) IPND_ADDR;
volatile unsigned int *imap2 = (unsigned int *) IMAP2_ADDR;
 
#define BUS_CLOCK_1 0
#define TMR_WRITE_CNTL 8
#define TMR_AUTO_RELOAD 4
#define TMR_ENABLE 2
#define TMR_TERM_CNT_STAT 1
*tmr1 = BUS_CLOCK_1 | TMR_AUTO_RELOAD;
*icon = 0x6000;
 
 
set_vector( (((unsigned int) timerisr) | 0x2), TIMER_VECTOR, 1 );
 
*imap2 = (*imap2 & 0xff0fffff) | (((TIMER_VECTOR >> 4) & 0xf) << 20);
 
/* initialize the i960RP timer 1 here */
/* set the timer countdown */
*trr1 = 33 * BSP_Configuration.microseconds_per_tick;
*tcr1 = 33 * BSP_Configuration.microseconds_per_tick;
*ipnd &= ~(1<<13);
*imsk |= (1 << 13);
Ttimer_val = 0;
*tmr1 = BUS_CLOCK_1 | TMR_AUTO_RELOAD | TMR_ENABLE;
 
}
 
 
 
rtems_isr timerisr(
rtems_vector_number vector
)
{
/* enable_tracing(); */
Ttimer_val++;
i960_clear_intr( 13 );
}
 
#define AVG_OVERHEAD 4 /* It typically takes 5.5 microseconds */
/* (11 countdowns) to start/stop the timer. */
#define LEAST_VALID 5 /* Don't trust a value lower than this */
 
int Read_timer()
{
volatile unsigned int *tcr1 = (unsigned int *) TCR1_ADDR;
volatile unsigned int *trr1 = (unsigned int *) TRR1_ADDR;
rtems_unsigned32 remaining, total;
 
/* this routine is supposed to count in 1/2 uSec units */
/* pretty funny when using a 33MHz clock for the counter */
remaining = *tcr1;
remaining = *trr1 - remaining;
total = (2 * ((Ttimer_val * *trr1) + remaining)) / 33;
/*
putnum(remaining);
console_sps_putc(':');
putnum(total);
*/
 
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;
}
/Makefile.am
0,0 → 1,32
##
## $Id: Makefile.am,v 1.2 2001-09-27 11:59:59 chris Exp $
##
 
AUTOMAKE_OPTIONS = foreign 1.4
 
PGM = $(ARCH)/timer.rel
 
C_FILES = timer.c
C_O_FILES = $(C_FILES:%.c=$(ARCH)/%.o)
 
OBJS = $(C_O_FILES)
 
include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
include $(top_srcdir)/../../../../../../automake/lib.am
 
#
# (OPTIONAL) Add local stuff here using +=
#
 
$(PGM): $(OBJS)
$(make-rel)
 
# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile
 
all-local: $(ARCH) $(OBJS) $(PGM)
 
.PRECIOUS: $(PGM)
 
EXTRA_DIST = timer.c timerisr.S
 
include $(top_srcdir)/../../../../../../automake/local.am

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