source: rtems/c/src/lib/libbsp/i386/i386ex/include/bsp.h @ 67ed2a8

/*
 *  This include file definitions related to an Intel i386ex board.
 *
 *  COPYRIGHT (c) 1989-1999.
 *  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 _BSP_H
#define _BSP_H

#ifdef __cplusplus
extern "C" {
#endif

#include <bspopts.h>

#include <rtems.h>
#include <rtems/iosupp.h>
#include <rtems/console.h>
#include <rtems/clockdrv.h>
#include <rtems/bspIo.h>
#include <libcpu/cpu.h>
#include <bsp/irq.h>

/*
 *  Simple spin delay in microsecond units for device drivers.
 *  This is very dependent on the clock speed of the target.
 */

#define rtems_bsp_delay( _microseconds ) \
  { \
    uint32_t         _counter; \
    \
    _counter = (_microseconds); \
    \
    asm volatile ( "0: nop;" \
                   " mov %0,%0 ;" \
                   " loop 0b" : "=c" (_counter) \
                              : "0"  (_counter) \
                 ); \
    \
  }

/* Constants */

#define RAM_START 0

/* replaced the earlier EI kludge of 0xfffff */

#define RAM_END   0x100000

#define IDT_SIZE 256
#define GDT_SIZE 8192

extern interrupt_gate_descriptor Interrupt_descriptor_table[IDT_SIZE];

#ifdef __cplusplus
}
#endif

#endif