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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-04-20 12:08:42 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-04-20 13:52:19 +0200 |
commit | e0dd8a5ad830798bc8082b03b8c42c32fb9660e0 (patch) | |
tree | d147bfc4d670fcdfbd2e2d2e75eb209f92e07df1 /c/src/lib/libbsp/no_cpu | |
parent | bsps: Move startup files to bsps (diff) | |
download | rtems-e0dd8a5ad830798bc8082b03b8c42c32fb9660e0.tar.bz2 |
bsps: Move benchmark timer to bsps
This patch is a part of the BSP source reorganization.
Update #3285.
Diffstat (limited to 'c/src/lib/libbsp/no_cpu')
-rw-r--r-- | c/src/lib/libbsp/no_cpu/no_bsp/Makefile.am | 4 | ||||
-rw-r--r-- | c/src/lib/libbsp/no_cpu/no_bsp/timer/timer.c | 92 | ||||
-rw-r--r-- | c/src/lib/libbsp/no_cpu/no_bsp/timer/timerisr.c | 38 |
3 files changed, 2 insertions, 132 deletions
diff --git a/c/src/lib/libbsp/no_cpu/no_bsp/Makefile.am b/c/src/lib/libbsp/no_cpu/no_bsp/Makefile.am index 2976ad672e..e0d7676fe6 100644 --- a/c/src/lib/libbsp/no_cpu/no_bsp/Makefile.am +++ b/c/src/lib/libbsp/no_cpu/no_bsp/Makefile.am @@ -25,8 +25,8 @@ librtemsbsp_a_SOURCES +=../../../../../../bsps/no_cpu/no_bsp/clock/ckinit.c # console librtemsbsp_a_SOURCES += ../../../../../../bsps/no_cpu/no_bsp/console/console.c # timer -librtemsbsp_a_SOURCES += timer/timer.c -librtemsbsp_a_SOURCES += timer/timerisr.c +librtemsbsp_a_SOURCES += ../../../../../../bsps/no_cpu/no_bsp/btimer/btimer.c +librtemsbsp_a_SOURCES += ../../../../../../bsps/no_cpu/no_bsp/btimer/timerisr.c # shmsupp librtemsbsp_a_SOURCES += shmsupp/addrconv.c librtemsbsp_a_SOURCES += shmsupp/getcfg.c diff --git a/c/src/lib/libbsp/no_cpu/no_bsp/timer/timer.c b/c/src/lib/libbsp/no_cpu/no_bsp/timer/timer.c deleted file mode 100644 index e9b59dc756..0000000000 --- a/c/src/lib/libbsp/no_cpu/no_bsp/timer/timer.c +++ /dev/null @@ -1,92 +0,0 @@ -/* timer.c - * - * 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. - * - * NOTE: It is important that the timer start/stop overhead be - * determined when porting or modifying this code. - * - * 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 <rtems.h> -#include <rtems/btimer.h> -#include <bsp.h> - -uint32_t Timer_interrupts; -bool benchmark_timer_find_average_overhead; - -void benchmark_timer_initialize( void ) -{ - - /* - * Timer has never overflowed. This may not be necessary on some - * implemenations of timer but .... - */ - - Timer_interrupts = 0; - - /* - * Somehow start the timer - */ -} - -/* - * 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; - - /* - * Read the timer and see how many clicks it has been since we started. - */ - - clicks = 0; /* XXX: read some HW here */ - - /* - * Total is calculated by taking into account the number of timer overflow - * interrupts since the timer was initialized and clicks since the last - * interrupts. - */ - - total = clicks * 0; - - if ( benchmark_timer_find_average_overhead == true ) - 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; -} diff --git a/c/src/lib/libbsp/no_cpu/no_bsp/timer/timerisr.c b/c/src/lib/libbsp/no_cpu/no_bsp/timer/timerisr.c deleted file mode 100644 index 5ca7152a54..0000000000 --- a/c/src/lib/libbsp/no_cpu/no_bsp/timer/timerisr.c +++ /dev/null @@ -1,38 +0,0 @@ -/** - * @file - * - * If required this ISR is used to bump a count of interval "overflow" - * interrupts which have occurred since the timer was started. The - * number of overflows is taken into account in the benchmark_timer_read() - * routine if necessary. - * - * To reduce overhead this is best to be the "rawest" hardware interupt - * handler you can write. This should be the only interrupt which can - * occur during the measured time period. - * - * @note This file is USUALLY in assembly and is LEAN AND MEAN. - * Any code in this isr is pure overhead which can perturb - * the accuracy of the Timing Test Suite. - */ - -/* - * 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 <rtems.h> -#include <rtems/btimer.h> - -extern uint32_t _Timer_interrupts; - -void timerisr( void ) -{ - /* - * _Timer_interrupts += TIMER_BETWEEN_OVERFLOWS (usually in microseconds) - * return from interrupt - */ -} |