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2008-08-20 Sebastian Huber <sebastian.huber@embedded-brains.de>

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* include/tm27.h: Uses now a decrementer exception handler.  Replaces
	previous file.
	* startup/bspstart.c: Install a default decrementer exception handler.
This commit is contained in:
Joel Sherrill
2008-08-20 17:27:43 +00:00
parent 9a85541b38
commit bbbb8f0840
3 changed files with 68 additions and 49 deletions
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6
c/src/lib/libbsp/powerpc/gen83xx/ChangeLog
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@@ -1,3 +1,9 @@
2008-08-20 Sebastian Huber <sebastian.huber@embedded-brains.de>
* include/tm27.h: Uses now a decrementer exception handler. Replaces
previous file.
* startup/bspstart.c: Install a default decrementer exception handler.
2008-08-19 Sebastian Huber <sebastian.huber@embedded-brains.de>
* include/bsp.h, network/network.c, spi/spi_init.c, startup/cpuinit.c,

84
c/src/lib/libbsp/powerpc/gen83xx/include/tm27.h
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@@ -1,63 +1,63 @@
/**
* @file
*
* @brief Support file for Timer Test 27.
*/
/*
* tm27.h
* Copyright (c) 2008
* Embedded Brains GmbH
* Obere Lagerstr. 30
* D-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
* http://www.rtems.com/license/LICENSE.
*
* tm27.h,v 1.2 2004/04/23 04:47:38 ralf Exp
* 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.
*/
#ifndef _RTEMS_TMTEST27
#error "This is an RTEMS internal file you must not include directly."
#endif
#error "This is an RTEMS internal file you must not include directly."
#endif /* _RTEMS_TMTEST27 */
#ifndef __tm27_h
#define __tm27_h
#ifndef TMTESTS_TM27_H
#define TMTESTS_TM27_H
#include <bsp/irq.h>
#include <libcpu/powerpc-utility.h>
#include <libcpu/raw_exception.h>
/*
* Stuff for Time Test 27
*/
#include <bsp/ppc_exc_bspsupp.h>
#define MUST_WAIT_FOR_INTERRUPT 1
void nullFunc() {}
static rtems_isr_entry tm27_interrupt_handler = NULL;
static rtems_irq_connect_data clockIrqData = {BSP_DECREMENTER,
0,
(rtems_irq_enable)nullFunc,
(rtems_irq_disable)nullFunc,
(rtems_irq_is_enabled) nullFunc};
void Install_tm27_vector(void (*_handler)())
static int tm27_exception_handler( BSP_Exception_frame *frame, unsigned number)
{
clockIrqData.hdl = _handler;
if (!BSP_install_rtems_irq_handler (&clockIrqData)) {
printk("Error installing clock interrupt handler!\n");
rtems_fatal_error_occurred(1);
tm27_interrupt_handler( 0);
return 0;
}
void Install_tm27_vector( rtems_isr_entry handler)
{
int rv = 0;
tm27_interrupt_handler = handler;
rv = ppc_exc_set_handler( ASM_DEC_VECTOR, tm27_exception_handler);
if (rv < 0) {
printk( "Error installing clock interrupt handler!\n");
}
}
#define Cause_tm27_intr() \
do { \
uint32_t _clicks = 8; \
asm volatile( "mtdec %0" : "=r" ((_clicks)) : "r" ((_clicks)) ); \
} while (0)
#define Cause_tm27_intr() \
ppc_set_decrementer_register( 8)
#define Clear_tm27_intr() \
do { \
uint32_t _clicks = 0xffffffff; \
asm volatile( "mtdec %0" : "=r" ((_clicks)) : "r" ((_clicks)) ); \
} while (0)
ppc_set_decrementer_register( UINT32_MAX)
#define Lower_tm27_intr() \
do { \
uint32_t _msr = 0; \
_ISR_Set_level( 0 ); \
asm volatile( "mfmsr %0 ;" : "=r" (_msr) : "r" (_msr) ); \
_msr |= 0x8002; \
asm volatile( "mtmsr %0 ;" : "=r" (_msr) : "r" (_msr) ); \
} while (0)
(void) ppc_external_exceptions_enable()
#endif
#endif /* TMTESTS_TM27_H */

27
c/src/lib/libbsp/powerpc/gen83xx/startup/bspstart.c
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@@ -27,6 +27,7 @@
#include <rtems/score/thread.h>
#include <libcpu/powerpc-utility.h>
#include <libcpu/raw_exception.h>
#include <bsp.h>
#include <bsp/bootcard.h>
@@ -52,11 +53,13 @@ unsigned int BSP_bus_frequency;
/* Configuration parameters for clock driver, ... */
uint32_t bsp_clicks_per_usec;
/*
* Use the shared implementations of the following routines.
* Look in rtems/c/src/lib/libbsp/shared/bsplibc.c.
*/
extern void cpu_init( void);
/* Default decrementer exception handler */
static int mpc83xx_decrementer_exception_handler( BSP_Exception_frame *frame, unsigned number)
{
ppc_set_decrementer_register( UINT32_MAX);
return 0;
}
void BSP_panic( char *s)
{
@@ -105,6 +108,9 @@ void bsp_get_work_area( void **work_area_start, size_t *work_area_size, void **h
void bsp_start( void)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
int rv = 0;
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
@@ -155,9 +161,16 @@ void bsp_start( void)
interrupt_stack_size
);
/* Install default handler for the decrementer exception */
rv = ppc_exc_set_handler( ASM_DEC_VECTOR, mpc83xx_decrementer_exception_handler);
if (rv < 0) {
BSP_panic( "Cannot install decrementer exception handler!\n");
}
/* Initalize interrupt support */
if (bsp_interrupt_initialize() != RTEMS_SUCCESSFUL) {
BSP_panic("Cannot intitialize interrupt support\n");
sc = bsp_interrupt_initialize();
if (sc != RTEMS_SUCCESSFUL) {
BSP_panic( "Cannot intitialize interrupt support\n");
}
#ifdef SHOW_MORE_INIT_SETTINGS