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/* bsp.h
*
* This include file definitions related to the ibm386 (go32) board.
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __IBMPC_h
#define __IBMPC_h
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems.h>
#include <iosupp.h>
#include <console.h>
#include <clockdrv.h>
/*
* Define the time limits for RTEMS Test Suite test durations.
* Long test and short test duration limits are provided. These
* values are in seconds and need to be converted to ticks for the
* application.
*
*/
#define MAX_LONG_TEST_DURATION 300 /* 5 minutes = 300 seconds */
#define MAX_SHORT_TEST_DURATION 3 /* 3 seconds */
/*
* Define the interrupt mechanism for Time Test 27
*
* NOTE: Use a software interrupt for the i386 family.
*/
#define MUST_WAIT_FOR_INTERRUPT 0
#define Install_tm27_vector( handler ) set_vector( (handler), 0x90, 1 )
#define Cause_tm27_intr() asm volatile( "int $0x90" : : );
#define Clear_tm27_intr()
#define Lower_tm27_intr()
/*
* Simple spin delay in microsecond units for device drivers.
* This is very dependent on the clock speed of the target.
*/
#define delay( _microseconds ) { \
rtems_unsigned32 _cnt = (_microseconds); \
asm volatile ("0: nop; mov %0,%0; loop 0b" : "=c"(_cnt) : "0"(_cnt) ); \
}
/* Constants */
/* Assume color console */
#define COLOR 1
#if COLOR
# define GDC_REG_PORT 0x3d4
# define GDC_VAL_PORT 0x3d5
# define TVRAM ((unsigned short *)0xb8000L)
#else
# define GDC_REG_PORT 0x3b4
# define GDC_VAL_PORT 0x3b5
# define TVRAM ((unsigned short *)0xb0000L)
#endif
/* White character attribute--works for MGA and CGA */
#define WHITE 0x07
/* Ports for PC keyboard */
#define KBD_CTL 0x61
#define KBD_DATA 0x60
#define KBD_STATUS 0x64
/* Constants relating to the 8254 (or 8253) programmable interval timers */
/* Port address of the control port and timer channels */
/*
* Macros for specifying values to be written into a mode register.
*/
#define IO_TIMER1 0x40
#define TIMER_CNTR0 (IO_TIMER1 + 0) /* timer 0 counter port */
#define TIMER_CNTR1 (IO_TIMER1 + 1) /* timer 1 counter port */
#define TIMER_CNTR2 (IO_TIMER1 + 2) /* timer 2 counter port */
#define TIMER_MODE (IO_TIMER1 + 3) /* timer mode port */
#define TIMER_SEL0 0x00 /* select counter 0 */
#define TIMER_SEL1 0x40 /* select counter 1 */
#define TIMER_SEL2 0x80 /* select counter 2 */
#define TIMER_INTTC 0x00 /* mode 0, intr on terminal cnt */
#define TIMER_ONESHOT 0x02 /* mode 1, one shot */
#define TIMER_RATEGEN 0x04 /* mode 2, rate generator */
#define TIMER_SQWAVE 0x06 /* mode 3, square wave */
#define TIMER_SWSTROBE 0x08 /* mode 4, s/w triggered strobe */
#define TIMER_HWSTROBE 0x0a /* mode 5, h/w triggered strobe */
#define TIMER_LATCH 0x00 /* latch counter for reading */
#define TIMER_LSB 0x10 /* r/w counter LSB */
#define TIMER_MSB 0x20 /* r/w counter MSB */
#define TIMER_16BIT 0x30 /* r/w counter 16 bits, LSB first */
#define TIMER_BCD 0x01 /* count in BCD */
#define CLOCK_DISABLE() \
({ char mask; inport_byte( 0x21, mask ); outport_byte( 0x21, mask | 1 ); })
#define CLOCK_ENABLE() \
({ char mask; inport_byte( 0x21, mask ); outport_byte( 0x21, mask & ~1); })
/* The internal tick rate in ticks per second */
#define TIMER_TICK 1193182
#define US_TO_TICK(us) (((us)*105+44)/88)
#define TICK_TO_US(tk) (((tk)*88+52)/105)
/* Structures */
#ifdef IBMPC_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
*/
/*
* How many libio files we want
*/
#define BSP_LIBIO_MAX_FDS 20
/* functions */
int _IBMPC_chrdy( char * ch );
int _IBMPC_inch( void );
void _IBMPC_outch( unsigned char );
/* miscellaneous stuff assumed to exist */
extern rtems_configuration_table BSP_Configuration;
/* routines */
i386_isr_entry set_vector(
rtems_isr_entry handler,
rtems_vector_number vector,
int type
);
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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