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/**
* @file
*
* @brief v850 CPU Initialize
*/
/*
* COPYRIGHT (c) 1989-2012.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/cpuimpl.h>
#include <rtems/score/isr.h>
#include <string.h> /* for memset */
/*
* v850 Specific Information:
*
* So far nothing known to be needed at this point during initialization.
*/
void _CPU_Initialize(void)
{
}
void _CPU_Fatal_halt( uint32_t source, CPU_Uint32ptr error )
{
__asm__ __volatile__ ( "di" );
__asm__ __volatile__ ( "mov %0, r10; " : "=r" ((error)) );
__asm__ __volatile__ ( "halt" );
}
/*
* v850 Specific Information:
*
* This method returns 0 if interrupts are enabled and 1 if they are disabled.
* The v850 only has two interrupt levels (on and off).
*/
uint32_t _CPU_ISR_Get_level( void )
{
unsigned int psw;
v850_get_psw( psw );
if ( (psw & V850_PSW_INTERRUPT_DISABLE_MASK) == V850_PSW_INTERRUPT_DISABLE )
return 1;
return 0;
}
/*
* v850 Specific Information:
*
* This method initializes a v850 context control structure.
*/
void _CPU_Context_Initialize(
Context_Control *the_context,
uint32_t *stack_base,
uint32_t size,
uint32_t new_level,
void *entry_point,
bool is_fp,
void *tls_area
)
{
uint32_t stack_high; /* highest "stack aligned" address */
uint32_t psw; /* highest "stack aligned" address */
memset( the_context, 0, sizeof(Context_Control) );
/*
* On CPUs with stacks which grow down, we build the stack
* based on the stack_high address.
*/
stack_high = ((uint32_t)(stack_base) + size);
stack_high &= ~(CPU_STACK_ALIGNMENT - 1);
v850_get_psw( psw );
psw &= ~V850_PSW_INTERRUPT_DISABLE_MASK;
if ( new_level )
psw |= V850_PSW_INTERRUPT_DISABLE;
else
psw |= V850_PSW_INTERRUPT_ENABLE;
the_context->r31 = (uint32_t) entry_point;
the_context->r3_stack_pointer = stack_high;
the_context->psw = psw;
#if 0
printk( "the_context = %p\n", the_context );
printk( "stack base = 0x%08x\n", stack_base );
printk( "stack size = 0x%08x\n", size );
printk( "sp = 0x%08x\n", the_context->r3_stack_pointer );
printk( "psw = 0x%08x\n", the_context->psw );
#endif
}
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