diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc6xx/clock')
-rw-r--r-- | c/src/lib/libcpu/powerpc/mpc6xx/clock/Makefile.in | 68 | ||||
-rw-r--r-- | c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.c | 208 | ||||
-rw-r--r-- | c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.h | 42 |
3 files changed, 318 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc6xx/clock/Makefile.in b/c/src/lib/libcpu/powerpc/mpc6xx/clock/Makefile.in new file mode 100644 index 0000000000..fc945cd304 --- /dev/null +++ b/c/src/lib/libcpu/powerpc/mpc6xx/clock/Makefile.in @@ -0,0 +1,68 @@ +# +# $Id$ +# + +@SET_MAKE@ +srcdir = @srcdir@ +top_srcdir = @top_srcdir@ +top_builddir = ../../.. +subdir = powerpc/mpc6xx/clock + +RTEMS_ROOT = @RTEMS_ROOT@ +PROJECT_ROOT = @PROJECT_ROOT@ + +VPATH = @srcdir@ + +# C source names, if any, go here -- minus the .c +C_PIECES = c_clock +C_FILES = $(C_PIECES:%=%.c) +C_O_FILES = $(C_PIECES:%=${ARCH}/%.o) + +H_FILES = $(srcdir)/c_clock.h + +# 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) $(CC_FILES) $(H_FILES) $(S_FILES) +OBJS = $(C_O_FILES) $(CC_O_FILES) $(S_O_FILES) + +include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg +include $(RTEMS_ROOT)/make/leaf.cfg + +INSTALL_CHANGE = @INSTALL_CHANGE@ + +# +# (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 += + +all: ${ARCH} $(SRCS) preinstall $(OBJS) + +preinstall: $(INSTALLDIRS) $(H_FILES) + @$(INSTALL_CHANGE) -m 644 $(H_FILES) $(PROJECT_INCLUDE)/libcpu + +# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile +install: all + +Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status + cd $(top_builddir) \ + && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status diff --git a/c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.c b/c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.c new file mode 100644 index 0000000000..b3d93f8f34 --- /dev/null +++ b/c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.c @@ -0,0 +1,208 @@ +/* + * Clock Tick Device Driver + * + * This routine utilizes the Decrementer Register common to the PPC family. + * + * The tick frequency is directly programmed to the configured number of + * microseconds per tick. + * + * 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. + * + * Modified to support the MPC750. + * Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr + * + * $Id$ + */ + +#include <rtems.h> +#include <rtems/libio.h> +#include <stdlib.h> /* for atexit() */ +#include <assert.h> +#include <libcpu/cpu.h> +#include <libcpu/c_clock.h> + +/* + * Clock ticks since initialization + */ + +volatile rtems_unsigned32 Clock_driver_ticks; + +/* + * This is the value programmed into the count down timer. + */ + +rtems_unsigned32 Clock_Decrementer_value; + +/* + * These are set by clock driver during its init + */ + +rtems_device_major_number rtems_clock_major = ~0; +rtems_device_minor_number rtems_clock_minor; + +void clockOff(void* unused) +{ + if (BSP_Configuration.ticks_per_timeslice) { + /* + * Nothing to do as we cannot disable all interrupts and + * the decrementer interrupt enable is MSR_EE + */ + } +} +void clockOn(void* unused) +{ + PPC_Set_decrementer( Clock_Decrementer_value ); +} + +/* + * Clock_isr + * + * This is the clock tick interrupt handler. + * + * Input parameters: + * vector - vector number + * + * Output parameters: NONE + * + * Return values: NONE + * + */ +void clockIsr() +{ + /* + * The driver has seen another tick. + */ + + PPC_Set_decrementer( Clock_Decrementer_value ); + + Clock_driver_ticks += 1; + + /* + * Real Time Clock counter/timer is set to automatically reload. + */ + + rtems_clock_tick(); +} + +int clockIsOn(void* unused) +{ + unsigned32 msr_value; + + _CPU_MSR_GET( msr_value ); + if (msr_value & MSR_EE) return 1; + return 0; +} + + +/* + * Clock_exit + * + * This routine allows the clock driver to exit by masking the interrupt and + * disabling the clock's counter. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + * + */ + +void Clock_exit( void ) +{ + if ( BSP_Configuration.ticks_per_timeslice ) { + (void) BSP_disconnect_clock_handler (); + } +} + +/* + * Clock_initialize + * + * This routine initializes the clock driver. + * + * Input parameters: + * major - clock device major number + * minor - clock device minor number + * parg - pointer to optional device driver arguments + * + * Output parameters: NONE + * + * Return values: + * rtems_device_driver status code + */ + +rtems_device_driver Clock_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *pargp +) +{ + Clock_Decrementer_value = (BSP_bus_frequency/4000)* + (BSP_Configuration.microseconds_per_tick/1000); + + if (!BSP_connect_clock_handler ()) { + printk("Unable to initialize system clock\n"); + rtems_fatal_error_occurred(1); + } + /* make major/minor avail to others such as shared memory driver */ + + rtems_clock_major = major; + rtems_clock_minor = minor; + + return RTEMS_SUCCESSFUL; +} /* Clock_initialize */ + +/* + * Clock_control + * + * This routine is the clock device driver control entry point. + * + * Input parameters: + * major - clock device major number + * minor - clock device minor number + * parg - pointer to optional device driver arguments + * + * Output parameters: NONE + * + * Return values: + * rtems_device_driver status code + */ + +rtems_device_driver Clock_control( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *pargp +) +{ + rtems_libio_ioctl_args_t *args = pargp; + + if (args == 0) + goto done; + + Clock_Decrementer_value = (BSP_bus_frequency/4000)* + (BSP_Configuration.microseconds_per_tick/1000); + + if (args->command == rtems_build_name('I', 'S', 'R', ' ')) + clockIsr(); + else if (args->command == rtems_build_name('N', 'E', 'W', ' ')) + { + if (!BSP_connect_clock_handler ()) { + printk("Error installing clock interrupt handler!\n"); + rtems_fatal_error_occurred(1); + } + } +done: + return RTEMS_SUCCESSFUL; +} + + + + + + diff --git a/c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.h b/c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.h new file mode 100644 index 0000000000..237273f6f9 --- /dev/null +++ b/c/src/lib/libcpu/powerpc/mpc6xx/clock/c_clock.h @@ -0,0 +1,42 @@ +/* + * Clock Tick Device Driver + * + * This routine utilizes the Decrementer Register common to the PPC family. + * + * The tick frequency is directly programmed to the configured number of + * microseconds per tick. + * + * 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. + * + * Modified to support the MPC750. + * Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr + * + * $Id$ + */ + +#ifndef _LIB_LIBCPU_C_CLOCK_H +#define _LIB_LIBCPU_C_CLOCK_H + +#include <rtems.h> +#include <bsp.h> + +/* + * Theses functions and variables represent the API exported by the CPU to the BSP + */ +extern void clockOff (void* unused); +extern void clockOn (void* unused); +extern void clockIsr (void); +extern int clockIsOn (void* unused); + +#endif + + + + + |