From e2bd1f653a3bbf969962082b9ccf1e73b0879819 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Wed, 21 Mar 2018 16:38:43 +0100 Subject: bsp/bfin: Move libcpu content to bsps This patch is a part of the BSP source reorganization. Update #3285. --- c/src/lib/libcpu/bfin/timer/timer.c | 96 ------------------------------------- 1 file changed, 96 deletions(-) delete mode 100644 c/src/lib/libcpu/bfin/timer/timer.c (limited to 'c/src/lib/libcpu/bfin/timer/timer.c') diff --git a/c/src/lib/libcpu/bfin/timer/timer.c b/c/src/lib/libcpu/bfin/timer/timer.c deleted file mode 100644 index 02540fe2ce..0000000000 --- a/c/src/lib/libcpu/bfin/timer/timer.c +++ /dev/null @@ -1,96 +0,0 @@ -/** - * @file - * @brief Timer for Blackfin - * - * This file manages the benchmark timer used by the RTEMS Timing Test - * Suite. Each measured time period is demarcated by calls to - * benchmark_timer_initialize() and benchmark_timer_read(). - * benchmark_timer_read() usually returns the number of microseconds - * since benchmark_timer_initialize() exitted. - */ - -/* - * Copyright (c) 2006 by Atos Automacao Industrial Ltda. - * written by Alain Schaefer - * and Antonio Giovanini - * - * 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 -#include - -uint32_t Timer_interrupts; -bool benchmark_timer_find_average_overhead; - -/* - * benchmark_timer_initialize - * - * Blackfin processor has a counter for clock cycles. - */ -void benchmark_timer_initialize( void ) -{ - - /*reset counters*/ - __asm__ ("R2 = 0;"); - __asm__ ("CYCLES = R2;"); - __asm__ ("CYCLES2 = R2;"); - /*start counters*/ - __asm__ ("R2 = SYSCFG;"); - __asm__ ("BITSET(R2,1);"); - __asm__ ("SYSCFG = R2"); - -} - -/* - * 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 0 /* It typically takes X.X microseconds */ - /* (Y countdowns) to start/stop the timer. */ - /* This value is in microseconds. */ -#define LEAST_VALID 1 /* Don't trust a clicks value lower than this */ - -benchmark_timer_t benchmark_timer_read( void ) -{ - uint32_t clicks; - uint32_t total; - register uint32_t cycles __asm__ ("R2"); - - /* stop counter */ - __asm__ ("R2 = SYSCFG;"); - __asm__ ("BITCLR(R2,1);"); - __asm__ ("SYSCFG = R2;"); - __asm__ ("R2 = CYCLES;"); - - - clicks = cycles; /* Clock cycles */ - - /* converting to microseconds */ - total = clicks / (CCLK/1000000); - - if ( benchmark_timer_find_average_overhead == 1 ) - return total; /* in XXX microsecond units */ - else { - if ( total < LEAST_VALID ) - return 0; /* below timer resolution */ - /* - * Somehow convert total into microseconds - */ - 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