diff options
Diffstat (limited to 'c/src/lib/libbsp/i960/rxgen960/timer')
| -rw-r--r-- | c/src/lib/libbsp/i960/rxgen960/timer/Makefile.in | 59 | ||||
| -rw-r--r-- | c/src/lib/libbsp/i960/rxgen960/timer/timer.c | 133 | ||||
| -rw-r--r-- | c/src/lib/libbsp/i960/rxgen960/timer/timerisr.s | 65 |
3 files changed, 257 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i960/rxgen960/timer/Makefile.in b/c/src/lib/libbsp/i960/rxgen960/timer/Makefile.in new file mode 100644 index 0000000000..34600c156e --- /dev/null +++ b/c/src/lib/libbsp/i960/rxgen960/timer/Makefile.in @@ -0,0 +1,59 @@ +# +# $Id$ +# + +@SET_MAKE@ +srcdir = @srcdir@ +VPATH = @srcdir@ +RTEMS_ROOT = @top_srcdir@ +PROJECT_ROOT = @PROJECT_ROOT@ + +PGM=${ARCH}/timer.rel + +# C source names, if any, go here -- minus the .c +C_PIECES=timer +C_FILES=$(C_PIECES:%=%.c) +C_O_FILES=$(C_PIECES:%=${ARCH}/%.o) + +H_FILES= + +# Assembly source names, if any, go here -- minus the .s +S_PIECES= +S_FILES=$(S_PIECES:%=%.s) +S_O_FILES=$(S_FILES:%.s=${ARCH}/%.o) + +SRCS=$(C_FILES) $(H_FILES) $(S_FILES) +OBJS=$(C_O_FILES) $(S_O_FILES) + +include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg +include $(RTEMS_ROOT)/make/leaf.cfg + +# +# (OPTIONAL) Add local stuff here using += +# + +DEFINES += +CPPFLAGS += +CFLAGS += + +LD_PATHS += +LD_LIBS += +LDFLAGS += + +# +# Add your list of files to delete here. The config files +# already know how to delete some stuff, so you may want +# to just run 'make clean' first to see what gets missed. +# 'make clobber' already includes 'make clean' +# + +CLEAN_ADDITIONS += +CLOBBER_ADDITIONS += + +${PGM}: ${SRCS} ${OBJS} + $(make-rel) + +all: ${ARCH} $(SRCS) $(PGM) + +# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile +install: all diff --git a/c/src/lib/libbsp/i960/rxgen960/timer/timer.c b/c/src/lib/libbsp/i960/rxgen960/timer/timer.c new file mode 100644 index 0000000000..8b166090e2 --- /dev/null +++ b/c/src/lib/libbsp/i960/rxgen960/timer/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. + * + * $Id$ + */ + + +#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; +} diff --git a/c/src/lib/libbsp/i960/rxgen960/timer/timerisr.s b/c/src/lib/libbsp/i960/rxgen960/timer/timerisr.s new file mode 100644 index 0000000000..3c1368f130 --- /dev/null +++ b/c/src/lib/libbsp/i960/rxgen960/timer/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. + * + * $Id$ + */ + +#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 + bbs 4,sf0,loop_til_cleared +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) |