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authorJoel Sherrill <joel.sherrill@OARcorp.com>1998-03-20 17:20:45 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>1998-03-20 17:20:45 +0000
commitf8b27df985a1c65b329164fe1f57ca348fe862c1 (patch)
tree71966dab41fe483c6b830876bacc761902465a62 /c/src/lib/libcpu/sh/sh7032/clock
parentSH port submitted from Ralf Corsepius <corsepiu@faw.uni-ulm.de>. (diff)
downloadrtems-f8b27df985a1c65b329164fe1f57ca348fe862c1.tar.bz2
New port from Ralf Corsepius <corsepiu@faw.uni-ulm.de>.
Diffstat (limited to 'c/src/lib/libcpu/sh/sh7032/clock')
-rw-r--r--c/src/lib/libcpu/sh/sh7032/clock/Makefile.in60
-rw-r--r--c/src/lib/libcpu/sh/sh7032/clock/ckinit.c289
2 files changed, 349 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/sh/sh7032/clock/Makefile.in b/c/src/lib/libcpu/sh/sh7032/clock/Makefile.in
new file mode 100644
index 0000000000..d7946d5a8f
--- /dev/null
+++ b/c/src/lib/libcpu/sh/sh7032/clock/Makefile.in
@@ -0,0 +1,60 @@
+#
+# $Id$
+#
+
+@SET_MAKE@
+srcdir = @srcdir@
+VPATH=@srcdir@
+RTEMS_ROOT = @top_srcdir@
+PROJECT_ROOT = @PROJECT_ROOT@
+
+PGM=${ARCH}/clock.rel
+
+# C source names, if any, go here -- minus the .c
+C_PIECES=ckinit
+C_FILES=$(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 += $(CFLAGS_OS_V)
+
+LD_PATHS +=
+LD_LIBS +=
+LDFLAGS +=
+
+#
+# Add your list of files to delete here. The config files
+# already know how to delete some stuff, so you may want
+# to just run 'make clean' first to see what gets missed.
+# 'make clobber' already includes 'make clean'
+#
+
+CLEAN_ADDITIONS +=
+CLOBBER_ADDITIONS +=
+
+${PGM}: ${SRCS} ${OBJS}
+ ${make-rel}
+
+all: ${ARCH} $(SRCS) $(PGM)
+
+# the .rel file built here will be put into libbsp.a by
+# libbsp/sh/BSP/wrapup/Makefile
+install: all
diff --git a/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c b/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c
new file mode 100644
index 0000000000..868d0cbf4b
--- /dev/null
+++ b/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c
@@ -0,0 +1,289 @@
+/*
+ * This file contains the clock driver the Hitachi SH 703X
+ *
+ * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
+ * Bernd Becker (becker@faw.uni-ulm.de)
+ *
+ * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *
+ * COPYRIGHT (c) 1998.
+ * On-Line Applications Research Corporation (OAR).
+ * Copyright assigned to U.S. Government, 1994.
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.OARcorp.com/rtems/license.html.
+ *
+ * $Id$
+ */
+
+#include <bsp.h>
+
+#include <stdlib.h>
+
+#include <rtems/libio.h>
+#include <rtems/score/sh_io.h>
+#include <rtems/score/sh.h>
+#include <rtems/score/cpu_isps.h>
+#include <rtems/score/iosh7030.h>
+
+#define _ITU_COUNTER0_MICROSECOND (MHZ/4)
+
+#ifndef CLOCKPRIO
+#define CLOCKPRIO 10
+#endif
+
+#define ITU0_STARTMASK 0xfe
+#define ITU0_SYNCMASK 0xfe
+#define ITU0_MODEMASK 0xfe
+#define ITU0_TCRMASK 0x22
+#define ITU_STAT_MASK 0xf8
+#define ITU0_IRQMASK 0xfe
+#define ITU0_TIERMASK 0x01
+#define IPRC_ITU0_MASK 0xff0f
+#define ITU0_TIORVAL 0x08
+
+/*
+ * The interrupt vector number associated with the clock tick device
+ * driver.
+ */
+
+#define CLOCK_VECTOR IMIA0_ISP_V
+
+/*
+ * Clock_driver_ticks is a monotonically increasing counter of the
+ * number of clock ticks since the driver was initialized.
+ */
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+
+static void Clock_exit( void );
+static rtems_isr Clock_isr( rtems_vector_number vector );
+
+/*
+ * Clock_isrs is the number of clock ISRs until the next invocation of
+ * the RTEMS clock tick routine. The clock tick device driver
+ * gets an interrupt once a millisecond and counts down until the
+ * length of time between the user configured microseconds per tick
+ * has passed.
+ */
+
+rtems_unsigned32 Clock_isrs; /* ISRs until next tick */
+static rtems_unsigned32 Clock_isrs_const; /* only calculated once */
+
+/*
+ * These are set by clock driver during its init
+ */
+
+rtems_device_major_number rtems_clock_major = ~0;
+rtems_device_minor_number rtems_clock_minor;
+
+/*
+ * The previous ISR on this clock tick interrupt vector.
+ */
+
+rtems_isr_entry Old_ticker;
+
+/*
+ * Isr Handler
+ */
+
+rtems_isr Clock_isr(
+ rtems_vector_number vector
+)
+{
+ /*
+ * bump the number of clock driver ticks since initialization
+ *
+
+ * determine if it is time to announce the passing of tick as configured
+ * to RTEMS through the rtems_clock_tick directive
+ *
+ * perform any timer dependent tasks
+ */
+ unsigned8 temp;
+
+ /* reset the flags of the status register */
+ temp = read8( ITU_TSR0) & ITU_STAT_MASK;
+ write8( temp, ITU_TSR0);
+
+ Clock_driver_ticks++ ;
+
+ if( Clock_isrs == 1)
+ {
+ rtems_clock_tick();
+ Clock_isrs = Clock_isrs_const;
+ }
+ else
+ {
+ Clock_isrs-- ;
+ }
+}
+
+/*
+ * Install_clock
+ *
+ * Install a clock tick handler and reprograms the chip. This
+ * is used to initially establish the clock tick.
+ */
+
+void Install_clock(
+ rtems_isr_entry clock_isr
+)
+{
+ unsigned8 temp8 = 0;
+
+ /*
+ * Initialize the clock tick device driver variables
+ */
+
+ Clock_driver_ticks = 0;
+ Clock_isrs_const = BSP_Configuration.microseconds_per_tick / 10000;
+ Clock_isrs = Clock_isrs_const;
+
+ /*
+ * If ticks_per_timeslice is configured as non-zero, then the user
+ * wants a clock tick.
+ */
+
+ if ( BSP_Configuration.ticks_per_timeslice ) {
+ Old_ticker = (rtems_isr_entry) set_vector( Clock_isr, CLOCK_VECTOR, 1 );
+ /*
+ * Hardware specific initialize goes here
+ */
+
+ /* stop Timer 0 */
+ temp8 = read8( ITU_TSTR) & ITU0_STARTMASK;
+ write8( temp8, ITU_TSTR);
+
+ /* set initial counter value to 0 */
+ write16( 0, ITU_TCNT0);
+
+ /* Timer 0 runs independent */
+ temp8 = read8( ITU_TSNC) & ITU0_SYNCMASK;
+ write8( temp8, ITU_TSNC);
+
+ /* Timer 0 normal mode */
+ temp8 = read8( ITU_TMDR) & ITU0_MODEMASK;
+ write8( temp8, ITU_TMDR);
+
+ /* TCNT is cleared by GRA ; internal clock /4 */
+ write8( ITU0_TCRMASK , ITU_TCR0);
+
+ /* use GRA without I/O - pins */
+ write8( ITU0_TIORVAL, ITU_TIOR0);
+
+ /* reset flags of the status register */
+ temp8 = read8( ITU_TSR0) & ITU_STAT_MASK;
+ write8( temp8, ITU_TSR0);
+
+ /* Irq if is equal GRA */
+ temp8 = read8( ITU_TIER0) | ITU0_TIERMASK;
+ write8( temp8, ITU_TIER0);
+
+ /* set interrupt priority */
+ if( sh_set_irq_priority( CLOCK_VECTOR, CLOCKPRIO ) != RTEMS_SUCCESSFUL)
+ rtems_fatal_error_occurred( RTEMS_NOT_CONFIGURED);
+
+ /* set counter limits */
+ write16( _ITU_COUNTER0_MICROSECOND * BSP_Configuration.microseconds_per_tick,
+ ITU_GRA0);
+
+ /* start counter */
+ temp8 = read8( ITU_TSTR) |~ITU0_STARTMASK;
+ write8( temp8, ITU_TSTR);
+
+ }
+
+ /*
+ * Schedule the clock cleanup routine to execute if the application exits.
+ */
+
+ atexit( Clock_exit );
+}
+
+/*
+ * Clean up before the application exits
+ */
+
+void Clock_exit( void )
+{
+ unsigned8 temp8 = 0;
+ if ( BSP_Configuration.ticks_per_timeslice ) {
+
+ /* turn off the timer interrupts */
+ /* set interrupt priority to 0 */
+ if( sh_set_irq_priority( CLOCK_VECTOR, 0 ) != RTEMS_SUCCESSFUL)
+ rtems_fatal_error_occurred( RTEMS_UNSATISFIED);
+
+/*
+ * temp16 = read16( ITU_TIER0) & IPRC_ITU0_IRQMASK;
+ * write16( temp16, ITU_TIER0);
+ */
+
+ /* stop counter */
+ temp8 = read8( ITU_TSTR) & ITU0_STARTMASK;
+ write8( temp8, ITU_TSTR);
+
+ /* old vector shall not be installed */
+ }
+}
+
+/*
+ * Clock_initialize
+ *
+ * Device driver entry point for clock tick driver initialization.
+ */
+
+rtems_device_driver Clock_initialize(
+ rtems_device_major_number major,
+ rtems_device_minor_number minor,
+ void *pargp
+)
+{
+ Install_clock( Clock_isr );
+
+ /*
+ * make major/minor avail to others such as shared memory driver
+ */
+
+ rtems_clock_major = major;
+ rtems_clock_minor = minor;
+
+ return RTEMS_SUCCESSFUL;
+}
+
+rtems_device_driver Clock_control(
+ rtems_device_major_number major,
+ rtems_device_minor_number minor,
+ void *pargp
+)
+{
+ rtems_unsigned32 isrlevel;
+ rtems_libio_ioctl_args_t *args = pargp;
+
+ if (args != 0)
+ {
+ /*
+ * This is hokey, but until we get a defined interface
+ * to do this, it will just be this simple...
+ */
+
+ if (args->command == rtems_build_name('I', 'S', 'R', ' '))
+ {
+ Clock_isr(CLOCK_VECTOR);
+ }
+ else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
+ {
+ rtems_interrupt_disable( isrlevel );
+ (void) set_vector( args->buffer, CLOCK_VECTOR, 1 );
+ rtems_interrupt_enable( isrlevel );
+ }
+ }
+ return RTEMS_SUCCESSFUL;
+}