diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1996-03-06 22:01:11 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1996-03-06 22:01:11 +0000 |
commit | 457b6ae167e56bc31946c1ed8fd483629239e0a8 (patch) | |
tree | f885e9bdb38712c6311018d3f925ec41a91b2821 /c/src/lib/libbsp/m68k/gen68360/timer/timer.c | |
parent | As part of reducing visibility into rtems and hiding the .inl files (diff) | |
download | rtems-457b6ae167e56bc31946c1ed8fd483629239e0a8.tar.bz2 |
Generic 68360 BSP (gen360) submitted by: W. Eric Norum <eric@skatter.usask.ca>.
Contact information:
W. Eric Norum
Saskatchewan Accelerator Laboratory
107 North Road
University of Saskatchewan
Saskatoon, Saskatchewan, CANADA
S7N 5C6
Diffstat (limited to 'c/src/lib/libbsp/m68k/gen68360/timer/timer.c')
-rw-r--r-- | c/src/lib/libbsp/m68k/gen68360/timer/timer.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/gen68360/timer/timer.c b/c/src/lib/libbsp/m68k/gen68360/timer/timer.c new file mode 100644 index 0000000000..13a14e106e --- /dev/null +++ b/c/src/lib/libbsp/m68k/gen68360/timer/timer.c @@ -0,0 +1,95 @@ +/* + * Timer_init() + * + * Use TIMER 1 and TIMER 2 for Timing Test Suite + * + * The hardware on the MC68360 makes these routines very simple. + * + * Based on the `gen68302' board support package, and covered by the + * original distribution terms. + * + * W. Eric Norum + * Saskatchewan Accelerator Laboratory + * University of Saskatchewan + * Saskatoon, Saskatchewan, CANADA + * eric@skatter.usask.ca + * + * $Id$ + */ + +/* + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * NOTE: It is important that the timer start/stop overhead be + * determined when porting or modifying this code. + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + */ + +#include <rtems.h> +#include <bsp.h> +#include "mc68360.h" + +void +Timer_initialize (void) +{ + /* + * Reset timers 1 and 2 + */ + m360.tgcr &= ~0x00FF; + m360.tcn1 = 0; + m360.tcn2 = 0; + m360.ter1 = 0xFFFF; + m360.ter2 = 0xFFFF; + + /* + * Cascade timers 1 and 2 + */ + m360.tgcr |= 0x0080; + + /* + * Configure timers 1 and 2 to a single 32-bit, 1 MHz timer. + * HARDWARE: + * Change the `25' to match your processor clock + */ + m360.tmr2 = ((25-1) << 8) | 0x2; + m360.tmr1 = 0; + + /* + * Start the timers + */ + m360.tgcr |= 0x0011; +} + +/* + * Return timer value in microsecond units + */ +int +Read_timer (void) +{ + return *(rtems_unsigned32 *)&m360.tcn1; +} + +/* + * Empty function call used in loops to measure basic cost of looping + * in Timing Test Suite. + */ +rtems_status_code +Empty_function (void) +{ + return RTEMS_SUCCESSFUL; +} + +void +Set_find_average_overhead(rtems_boolean find_flag) +{ +} |