diff options
Diffstat (limited to '')
| -rw-r--r-- | bsps/epiphany/epiphany_sim/btimer/btimer.c | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/bsps/epiphany/epiphany_sim/btimer/btimer.c b/bsps/epiphany/epiphany_sim/btimer/btimer.c deleted file mode 100644 index 9cb8526822..0000000000 --- a/bsps/epiphany/epiphany_sim/btimer/btimer.c +++ /dev/null @@ -1,108 +0,0 @@ -/* - * Copyright (c) 2015 University of York. - * Hesham ALMatary <hmka501@york.ac.uk> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <rtems.h> -#include <bsp.h> -#include <rtems/btimer.h> -#include <rtems/score/epiphany-utility.h> - -extern char bsp_start_vector_table_begin[]; - -bool benchmark_timer_find_average_overhead; - -static void benchmark_timer1_interrupt_handler(void) -{ - unsigned int val = 0xFFFFFFFF; - unsigned int event_type = 0x1; - - /* Embed assembly code for setting timer1 */ - __asm__ __volatile__ ("movts ctimer1, %[val] \t \n" :: [val] "r" (val)); - - __asm__ __volatile__ ("movfs r16, config; \t \n" - "mov r17, %%low(0xfffff0ff);\t \n" - "movt r17, %%high(0xffff0ff);\t \n" - "lsl r18, %[event_type], 0x8; \t \n" - "and r16, r16, r17; \t \n" - "orr r16, r16, r18; \t \n" - "movts config, r16; \t \n" - :: [event_type] "r" (event_type)); -} - -/* Start eCore tiemr 1 usef for profiling and timing analysis */ -void benchmark_timer_initialize( void ) -{ - /* Install interrupt handler for timer 1 */ - - void (**table)(void) = (void (**)(void)) bsp_start_vector_table_begin; - - table[TIMER1] = benchmark_timer1_interrupt_handler; - - benchmark_timer1_interrupt_handler(); -} - -/* - * 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 timer_val = 0; - uint32_t total; - - __asm__ __volatile__ ("movfs %[timer_val], ctimer1 \t \n" - :[timer_val] "=r" (timer_val):); - - total = (0xFFFFFFFF - timer_val); - - if ( benchmark_timer_find_average_overhead == true ) - return total; - 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; -} |