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2011-07-21 Sebastian Huber <sebastian.huber@embedded-brains.de>

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* shared/clock/clock.c: Fix to clear the first pending decrementer
	exception.
This commit is contained in:
Sebastian Huber
2011-07-21 15:10:07 +00:00
parent fdd9de8001
commit e715727613
2 changed files with 25 additions and 7 deletions
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27
c/src/lib/libbsp/powerpc/shared/clock/clock.c
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@@ -7,12 +7,13 @@
*/
/*
* Copyright (c) 2008, 2009
* Embedded Brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* rtems@embedded-brains.de
* Copyright (c) 2008-2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
@@ -94,6 +95,18 @@ static int ppc_clock_exception_handler( BSP_Exception_frame *frame, unsigned num
return 0;
}
static int ppc_clock_exception_handler_first( BSP_Exception_frame *frame, unsigned number)
{
/* We have to clear the first pending decrementer exception this way */
if (ppc_decrementer_register() >= 0x80000000) {
ppc_clock_exception_handler( frame, number);
}
ppc_exc_set_handler( ASM_DEC_VECTOR, ppc_clock_exception_handler);
return 0;
}
static int ppc_clock_exception_handler_booke( BSP_Exception_frame *frame, unsigned number)
{
@@ -208,7 +221,7 @@ rtems_device_driver Clock_initialize( rtems_device_major_number major, rtems_dev
ppc_clock_next_time_base = ppc_time_base() + ppc_clock_decrementer_value;
/* Install exception handler */
ppc_exc_set_handler( ASM_DEC_VECTOR, ppc_clock_exception_handler);
ppc_exc_set_handler( ASM_DEC_VECTOR, ppc_clock_exception_handler_first);
}
/* Set the decrementer value */