diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c b/c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c deleted file mode 100644 index 9f843cee4f..0000000000 --- a/c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c +++ /dev/null @@ -1,144 +0,0 @@ -/* - * This routine initializes the PIT on the MPC5xx. - * The tick frequency is specified by the BSP. - */ - -/* - * MPC5xx port sponsored by Defence Research and Development Canada - Suffield - * Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca) - * - * Derived from c/src/lib/libcpu/powerpc/mpc8xx/clock/clock.c: - * - * Author: Jay Monkman (jmonkman@frasca.com) - * Copyright (C) 1998 by Frasca International, Inc. - * - * Derived from c/src/lib/libcpu/ppc/ppc403/clock/clock.c: - * - * Author: Andrew Bray <andy@i-cubed.co.uk> - * - * COPYRIGHT (c) 1995 by i-cubed ltd. - * - * To anyone who acknowledges that this file is provided "AS IS" - * without any express or implied warranty: - * permission to use, copy, modify, and distribute this file - * for any purpose is hereby granted without fee, provided that - * the above copyright notice and this notice appears in all - * copies, and that the name of i-cubed limited not be used in - * advertising or publicity pertaining to distribution of the - * software without specific, written prior permission. - * i-cubed limited makes no representations about the suitability - * of this software for any purpose. - * - * Derived from c/src/lib/libcpu/hppa1_1/clock/clock.c: - * - * COPYRIGHT (c) 1989-2007. - * 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.h> -#include <rtems/clockdrv.h> -#include <rtems/libio.h> -#include <libcpu/irq.h> - -#include <stdlib.h> /* for atexit() */ -#include <mpc5xx.h> - -volatile uint32_t Clock_driver_ticks; -extern int BSP_connect_clock_handler(rtems_isr_entry); -extern int BSP_disconnect_clock_handler(void); -extern uint32_t bsp_clicks_per_usec; - -void Clock_exit( void ); - -/* - * ISR Handler - */ -rtems_isr Clock_isr(rtems_vector_number vector) -{ - usiu.piscrk = USIU_UNLOCK_KEY; - usiu.piscr |= USIU_PISCR_PS; /* acknowledge interrupt */ - usiu.piscrk = 0; - - Clock_driver_ticks++; - rtems_clock_tick(); -} - -void clockOn(void* unused) -{ - unsigned desiredLevel; - uint32_t pit_value; - - /* calculate and set modulus */ - pit_value = (rtems_configuration_get_microseconds_per_tick() * - bsp_clicks_per_usec) - 1 ; - - if (pit_value > 0xffff) { /* pit is only 16 bits long */ - rtems_fatal_error_occurred(-1); - } - usiu.sccrk = USIU_UNLOCK_KEY; - usiu.sccr &= ~USIU_SCCR_RTDIV; /* RTC and PIT clock is divided by 4 */ - usiu.sccrk = 0; - - usiu.pitck = USIU_UNLOCK_KEY; - usiu.pitc = pit_value; - usiu.pitck = 0; - - /* set PIT irq level, enable PIT, PIT interrupts */ - /* and clear int. status */ - desiredLevel = CPU_irq_level_from_symbolic_name(CPU_PERIODIC_TIMER); - - usiu.piscrk = USIU_UNLOCK_KEY; - usiu.piscr = USIU_PISCR_PIRQ(desiredLevel) /* set interrupt priority */ - | USIU_PISCR_PS /* acknowledge interrupt */ - | USIU_PISCR_PIE /* enable interrupt */ - | USIU_PISCR_PITF /* freeze during debug */ - | USIU_PISCR_PTE; /* enable timer */ - usiu.piscrk = 0; -} - -void clockOff(void* unused) -{ - /* disable PIT and PIT interrupts */ - usiu.piscrk = USIU_UNLOCK_KEY; - usiu.piscr &= ~(USIU_PISCR_PTE | USIU_PISCR_PIE); - usiu.piscrk = 0; -} - -int clockIsOn(void* unused) -{ - if (usiu.piscr & USIU_PISCR_PIE) - return 1; - return 0; -} - -/* - * Called via atexit() - * Remove the clock interrupt handler by setting handler to NULL - */ -void Clock_exit(void) -{ - (void) BSP_disconnect_clock_handler (); -} - -static void Install_clock(rtems_isr_entry clock_isr) -{ - Clock_driver_ticks = 0; - - BSP_connect_clock_handler (clock_isr); - atexit(Clock_exit); -} - -rtems_device_driver Clock_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - Install_clock( Clock_isr ); - - return RTEMS_SUCCESSFUL; -} |