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/*
* C4X IO Information
*
* COPYRIGHT (c) 1989-2007.
* 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.com/license/LICENSE.
*
* $Id$
*/
#ifndef _RTEMS_TIC4X_C4XIO_H
#define _RTEMS_TIC4X_C4XIO_H
/*
* Address defines
*/
#ifdef _TMS320C40
#define C4X_TIMER_0 ((struct c4x_timer*)0x100020)
#else
#define C4X_TIMER_0 ((struct c4x_timer*)0x808020)
#define C4X_TIMER_1 ((struct c4x_timer*)0x808030)
#endif
/* XXX how portable */
/* C32 Internal Control Registers */
#define C4X_STRB0_REG 0x808064
#define C4X_STRB1_REG 0x808068
#define C4X_IOSTRB_REG 0x808060
/* C32 Internal RAM Locations */
/* XXX how long */
#define C4X_RAM_BLK_0 0x87fe00
#define C4X_RAM_BLK_1 0x87ff00
/*
* Data Structures to Overlay the Peripherals on the CPU
*/
struct c4x_timer {
volatile int tcontrol;
volatile int r1[3];
volatile int tcounter;
volatile int r2[3];
volatile int tperiod;
};
/*
* Timer Support Routines
*
* The following section of C4x timer code is based on C40 specific
* timer code from Ran Cabell <rcabell@norfolk.infi.net>. The
* only C3x/C4x difference spotted was the address of the timer.
* The names have been changed to be more RTEMS like.
*/
#define c4x_timer_get_control( _timer ) (volatile int)(_timer->tcontrol)
#define c4x_timer_set_control( _timer, _value ) \
do { \
(volatile int)(_timer->tcontrol) = _value; \
} while (0);
#define c4x_timer_start( _timer ) \
c4x_timer_set_control(_timer, 0x02c1 )
#define c4x_timer_stop( _timer ) _timer->tcontrol = 0
#define c4x_timer_get_counter( _timer ) (volatile int)(_timer->tcounter)
#define c4x_timer_set_counter( _timer, _value ) \
do { \
(volatile int)(_timer->tcounter) = _value; \
} while (0);
#define c4x_timer_get_period( _timer ) (volatile int)(_timer->tperiod)
#define c4x_timer_set_period( _timer, _value ) \
do { \
(volatile int)(_timer->tperiod) = _value; \
} while (0);
/*
* IO Flags
*
* NOTE: iof on c3x, iiof on c4x
*/
#ifdef _TMS320C40
#else
static inline uint32_t c3x_get_iof( void )
{
register uint32_t iof_value;
__asm__ volatile ("ldi iof, %0" : "=r" (iof_value));
return iof_value;
}
static inline void c3x_set_iof( uint32_t value )
{
__asm__ volatile ("ldi %0,iof" : : "g" (value) : "iof", "cc");
}
#endif
#endif
/* end if include file */
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