diff options
Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc8xx')
-rw-r--r-- | c/src/lib/libcpu/powerpc/mpc8xx/timer/timer.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc8xx/timer/timer.c b/c/src/lib/libcpu/powerpc/mpc8xx/timer/timer.c deleted file mode 100644 index b82d76497d..0000000000 --- a/c/src/lib/libcpu/powerpc/mpc8xx/timer/timer.c +++ /dev/null @@ -1,94 +0,0 @@ -/** - * @file - * @brief Timer Driver for the PowerPC MPC8xx. - * - * This file manages the interval timer on the PowerPC MPC8xx. - * We shall use the bottom 32 bits of the timebase register, - * - * @note This is not the PIT, but rather the RTEMS interval timer - */ - -/* - * Author: Jay Monkman (jmonkman@frasca.com) - * Copywright (C) 1998 by Frasca International, Inc. - * - * Derived from c/src/lib/libcpu/ppc/ppc403/timer/timer.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/timer/timer.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/btimer.h> -#include <mpc8xx.h> - -static volatile uint32_t Timer_starting; -static bool benchmark_timer_find_average_overhead; -extern uint32_t bsp_timer_least_valid; -extern uint32_t bsp_timer_average_overhead; - -/* - * This is so small that this code will be reproduced where needed. - */ -static inline uint32_t get_itimer(void) -{ - uint32_t ret; - - __asm__ volatile ("mftb %0" : "=r" ((ret))); /* TBLO */ - - return ret; -} - -void benchmark_timer_initialize(void) -{ - /* set interrupt level and enable timebase. This should never */ - /* generate an interrupt however. */ - m8xx.tbscr |= M8xx_TBSCR_TBIRQ(4) | M8xx_TBSCR_TBE; - - Timer_starting = get_itimer(); -} - -benchmark_timer_t benchmark_timer_read(void) -{ - uint32_t clicks; - uint32_t total; - - clicks = get_itimer(); - - total = clicks - Timer_starting; - - if ( benchmark_timer_find_average_overhead == 1 ) - return total; /* in XXX microsecond units */ - else { - if ( total < bsp_timer_least_valid ) { - return 0; /* below timer resolution */ - } - return (total - bsp_timer_average_overhead); - } -} - -void benchmark_timer_disable_subtracting_average_overhead(bool find_flag) -{ - benchmark_timer_find_average_overhead = find_flag; -} |