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| author | Thomas Doerfler <Thomas.Doerfler@embedded-brains.de> | 2008-07-11 10:00:41 +0000 |
|---|---|---|
| committer | Thomas Doerfler <Thomas.Doerfler@embedded-brains.de> | 2008-07-11 10:00:41 +0000 |
| commit | 69effbb4e16db7e6c85cd9b2bb8ad648c700b0a6 (patch) | |
| tree | 342616a26286d7378fdde5acdafe923003d0aa76 /c/src/lib/libbsp/m68k/genmcf548x/timer | |
| parent | added mcf548x BSP support (diff) | |
| download | rtems-69effbb4e16db7e6c85cd9b2bb8ad648c700b0a6.tar.bz2 | |
added variant to gen68360 BSP
added genmcf548x BSP
Diffstat (limited to 'c/src/lib/libbsp/m68k/genmcf548x/timer')
| -rw-r--r-- | c/src/lib/libbsp/m68k/genmcf548x/timer/timer.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/genmcf548x/timer/timer.c b/c/src/lib/libbsp/m68k/genmcf548x/timer/timer.c new file mode 100644 index 0000000000..676274e688 --- /dev/null +++ b/c/src/lib/libbsp/m68k/genmcf548x/timer/timer.c @@ -0,0 +1,94 @@ +/*===============================================================*\ +| Project: RTEMS generic mcf548x BSP | ++-----------------------------------------------------------------+ +| File: timer.c | ++-----------------------------------------------------------------+ +| The file contains the diagnostic timer code of generic MCF548x | +| BSP. | ++-----------------------------------------------------------------+ +| Copyright (c) 2007 | +| Embedded Brains GmbH | +| Obere Lagerstr. 30 | +| D-82178 Puchheim | +| Germany | +| rtems@embedded-brains.de | ++-----------------------------------------------------------------+ +| | +| Parts of the code has been derived from the "dBUG source code" | +| package Freescale is providing for M548X EVBs. The usage of | +| the modified or unmodified code and it's integration into the | +| generic mcf548x BSP has been done according to the Freescale | +| license terms. | +| | +| The Freescale license terms can be reviewed in the file | +| | +| Freescale_license.txt | +| | ++-----------------------------------------------------------------+ +| | +| The generic mcf548x BSP has been developed on the basic | +| structures and modules of the av5282 BSP. | +| | ++-----------------------------------------------------------------+ +| | +| The license and distribution terms for this file may be | +| found in the file LICENSE in this distribution or at | +| | +| http://www.rtems.com/license/LICENSE. | +| | ++-----------------------------------------------------------------+ +| | +| date history ID | +| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | +| 12.11.07 1.0 ras | +| | +\*===============================================================*/ + +/* + * Timer Init + * + * Use the second slice timer (SLT1) as the diagnostic timer. + */ + +#include <rtems.h> +#include <bsp.h> +#include <mcf548x/mcf548x.h> + +rtems_boolean Timer_driver_Find_average_overhead; +static uint32_t microsecond_timer_value = 0; + +void Timer_initialize(void) +{ +MCF548X_SLT_SLTCNT1 = 0xFFFFFFFF; +MCF548X_SLT_SCR1 |= (MCF548X_SLT_SCR_TEN | MCF548X_SLT_SCR_RUN); +} + +/* + * Return timer value in microsecond units + * XLB clock 100 MHz / 1us is equal to 100 counts + */ +int +Read_timer(void) +{ + microsecond_timer_value = (0xFFFFFFFF - MCF548X_SLT_SCNT1)/100; + return microsecond_timer_value; +} + +/* + * 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) +{ +Timer_driver_Find_average_overhead = find_flag; +} + + + |