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/*
* 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>
/*
* confdefs.h overrides for this BSP:
* - number of termios serial ports (defaults to 1)
* - Interrupt stack space is not minimum if defined.
*/
/* #define CONFIGURE_NUMBER_OF_TERMIOS_PORTS 2 */
#define CONFIGURE_INTERRUPT_STACK_MEMORY (8 * 1024)
/*
* 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
/* I/O addressing */
/*
*#define Is_tx_ready( _status ) ( (_status) & 0x20 )
*/
/* dec 20. try the TE instead of TBE as the check */
#define Is_tx_ready( _status ) ( (_status) & 0x40 )
#define Is_rx_ready( _status ) ( (_status) & 0x01 )
/* Structures */
#ifdef F386_INIT
#undef BSP_EXTERN
#define BSP_EXTERN
#else
#undef BSP_EXTERN
#define BSP_EXTERN extern
#endif
/*
* Device Driver Table Entries
*/
/*
* NOTE: Use the standard Console driver entry
*/
/*
* NOTE: Use the standard Clock driver entry
*/
/* miscellaneous stuff assumed to exist */
extern rtems_configuration_table BSP_Configuration;
#define IDT_SIZE 256
#define GDT_SIZE 8192
extern interrupt_gate_descriptor Interrupt_descriptor_table[IDT_SIZE];
extern segment_descriptors Global_descriptor_table [GDT_SIZE];
BSP_EXTERN unsigned short Idt[3]; /* Interrupt Descriptor Table Address */
BSP_EXTERN unsigned short Gdt[3]; /* Global Descriptor Table Address */
BSP_EXTERN unsigned int Idt_base;
BSP_EXTERN unsigned int Gdt_base;
/* routines */
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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