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/*
* Copyright (c) 2015, Hesham Almatary
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/wkspace.h>
/* _CPU_Initialize
*
* This routine performs processor dependent initialization.
*
* INPUT PARAMETERS: NONE
*
* NO_CPU Specific Information:
*
* XXX document implementation including references if appropriate
*/
void _CPU_Initialize(void)
{
/*
* If there is not an easy way to initialize the FP context
* during Context_Initialize, then it is usually easier to
* save an "uninitialized" FP context here and copy it to
* the task's during Context_Initialize.
*/
/* FP context initialization support goes here */
}
void _CPU_Context_Initialize(
Context_Control *context,
void *stack_area_begin,
size_t stack_area_size,
uint32_t new_level,
void (*entry_point)( void ),
bool is_fp,
void *tls_area
)
{
uint32_t stack = ((uint32_t) stack_area_begin);
uint32_t stack_high = stack + stack_area_size;
memset(context, 0, sizeof(*context));
context->r[0] = stack_high;
context->r[3] = (uint32_t) entry_point;
}
/*PAGE
*
* _CPU_ISR_Get_level
*
* NO_CPU Specific Information:
*
* XXX document implementation including references if appropriate
*/
uint32_t _CPU_ISR_Get_level( void )
{
/*
* This routine returns the current interrupt level.
*/
return 0;
}
/*PAGE
*
* _CPU_ISR_install_raw_handler
*
* NO_CPU Specific Information:
*
* XXX document implementation including references if appropriate
*/
void _CPU_ISR_install_raw_handler(
uint32_t vector,
proc_ptr new_handler,
proc_ptr *old_handler
)
{
/*
* This is where we install the interrupt handler into the "raw" interrupt
* table used by the CPU to dispatch interrupt handlers.
*/
}
/*PAGE
*
* _CPU_ISR_install_vector
*
* This kernel routine installs the RTEMS handler for the
* specified vector.
*
* Input parameters:
* vector - interrupt vector number
* old_handler - former ISR for this vector number
* new_handler - replacement ISR for this vector number
*
* Output parameters: NONE
*
*
* NO_CPU Specific Information:
*
* XXX document implementation including references if appropriate
*/
void _CPU_ISR_install_vector(
uint32_t vector,
proc_ptr new_handler,
proc_ptr *old_handler
)
{
*old_handler = _ISR_Vector_table[ vector ];
/*
* If the interrupt vector table is a table of pointer to isr entry
* points, then we need to install the appropriate RTEMS interrupt
* handler for this vector number.
*/
_CPU_ISR_install_raw_handler( vector, new_handler, old_handler );
/*
* We put the actual user ISR address in '_ISR_vector_table'. This will
* be used by the _ISR_Handler so the user gets control.
*/
_ISR_Vector_table[ vector ] = new_handler;
}
/*PAGE
*
* _CPU_Install_interrupt_stack
*
* NO_CPU Specific Information:
*
* XXX document implementation including references if appropriate
*/
void _CPU_Install_interrupt_stack( void )
{
}
/*PAGE
*
* _CPU_Thread_Idle_body
*
* NOTES:
*
* 1. This is the same as the regular CPU independent algorithm.
*
* 2. If you implement this using a "halt", "idle", or "shutdown"
* instruction, then don't forget to put it in an infinite loop.
*
* 3. Be warned. Some processors with onboard DMA have been known
* to stop the DMA if the CPU were put in IDLE mode. This might
* also be a problem with other on-chip peripherals. So use this
* hook with caution.
*
* NO_CPU Specific Information:
*
* XXX document implementation including references if appropriate
*/
void *_CPU_Thread_Idle_body( uintptr_t ignored )
{
for( ; ; )
/* insert your "halt" instruction here */ ;
return NULL;
}
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