From b6755affc05466a49e684c316ea6e6f00c21c370 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Fri, 9 Mar 2018 16:45:56 +0100 Subject: bsps/mips: Move libcpu content to bsps This patch is a part of the BSP source reorganization. Update #3285. --- c/src/lib/libcpu/mips/timer/timer.c | 113 ------------------------------------ 1 file changed, 113 deletions(-) delete mode 100644 c/src/lib/libcpu/mips/timer/timer.c (limited to 'c/src/lib/libcpu/mips/timer/timer.c') diff --git a/c/src/lib/libcpu/mips/timer/timer.c b/c/src/lib/libcpu/mips/timer/timer.c deleted file mode 100644 index da5291a48a..0000000000 --- a/c/src/lib/libcpu/mips/timer/timer.c +++ /dev/null @@ -1,113 +0,0 @@ -/** - * @file - * @brief IDT 4650 Timer Driver. - * - * This file manages the benchmark timer used by the RTEMS Timing Test - * Suite. - */ - -/* - * Author: Craig Lebakken - * - * COPYRIGHT (c) 1996 by Transition Networks Inc. - * - * 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 Transition Networks not be used in - * advertising or publicity pertaining to distribution of the - * software without specific, written prior permission. - * Transition Networks makes no representations about the suitability - * of this software for any purpose. - * - * derived from src/lib/libbsp/no_cpu/no_bsp/timer/timer.c - * - * COPYRIGHT (c) 1989-1999. - * 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 -#include - -#define CLOCKS_PER_MICROSECOND ( CPU_CLOCK_RATE_MHZ ) -#define TIMER_MAX_VALUE 0xffffffff - -extern uint32_t mips_read_timer( void ); - -static bool benchmark_timer_find_average_overhead; -static uint32_t benchmark_timer_initial_value = 0; - -void benchmark_timer_initialize( void ) -{ - benchmark_timer_initial_value = mips_read_timer(); - /* - * Somehow start the timer - */ - - /* Timer on 4650 is always running */ -} - -/* - * The following controls the behavior of benchmark_timer_read(). - * - * AVG_OVEREHAD is the overhead for starting and stopping the timer. It - * is usually deducted from the number returned. - * - * LEAST_VALID is the lowest number this routine should trust. Numbers - * below this are "noise" and zero is returned. - */ - -#define AVG_OVERHEAD 8 /* It typically takes X.X microseconds */ - /* (Y countdowns) to start/stop the timer. */ - /* This value is in cycles. */ -#define LEAST_VALID 1 /* Don't trust a clicks value lower than this */ - -benchmark_timer_t benchmark_timer_read( void ) -{ - uint64_t clicks; - uint32_t total; - - /* - * Read the timer and see how many clicks it has been since we started. - */ - - clicks = mips_read_timer(); /* XXX: read some HW here */ - if (clicks < benchmark_timer_initial_value) - { - clicks += TIMER_MAX_VALUE; - } - clicks -= benchmark_timer_initial_value; - - /* - * Total is calculated by taking into account the number of timer overflow - * interrupts since the timer was initialized and clicks since the last - * interrupts. - */ -#if 0 /* leave total in number of cycles */ - total = clicks / CLOCKS_PER_MICROSECOND; -#else - total = clicks; -#endif - - if ( benchmark_timer_find_average_overhead == 1 ) - return total; /* in # cycles units */ - else { - if ( total < LEAST_VALID ) - return 0; /* below timer resolution */ - /* - * leave total in cycles - */ - return (total - AVG_OVERHEAD); - } -} - -void benchmark_timer_disable_subtracting_average_overhead(bool find_flag) -{ - benchmark_timer_find_average_overhead = find_flag; -} -- cgit v1.2.3