209 lines
5.6 KiB
C
Executable file
209 lines
5.6 KiB
C
Executable file
/*
|
|
** atariints.h -- Atari Linux interrupt handling structs and prototypes
|
|
**
|
|
** Copyright 1994 by Björn Brauel
|
|
**
|
|
** 5/2/94 Roman Hodek:
|
|
** TT interrupt definitions added.
|
|
**
|
|
** 12/02/96: (Roman)
|
|
** Adapted to new int handling scheme (see ataints.c); revised numbering
|
|
**
|
|
** This file is subject to the terms and conditions of the GNU General Public
|
|
** License. See the file COPYING in the main directory of this archive
|
|
** for more details.
|
|
**
|
|
*/
|
|
|
|
#ifndef _LINUX_ATARIINTS_H_
|
|
#define _LINUX_ATARIINTS_H_
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/atarihw.h>
|
|
|
|
/*
|
|
** Atari Interrupt sources.
|
|
**
|
|
*/
|
|
|
|
#define STMFP_SOURCE_BASE 8
|
|
#define TTMFP_SOURCE_BASE 24
|
|
#define SCC_SOURCE_BASE 40
|
|
#define VME_SOURCE_BASE 56
|
|
#define VME_MAX_SOURCES 16
|
|
|
|
#define NUM_ATARI_SOURCES 141
|
|
|
|
/* convert vector number to int source number */
|
|
#define IRQ_VECTOR_TO_SOURCE(v) ((v) - ((v) < 0x20 ? 0x18 : (0x40-8)))
|
|
|
|
/* convert irq_handler index to vector number */
|
|
#define IRQ_SOURCE_TO_VECTOR(i) ((i) + ((i) < 8 ? 0x18 : (0x40-8)))
|
|
|
|
/* ST-MFP interrupts */
|
|
#define IRQ_MFP_BUSY (8)
|
|
#define IRQ_MFP_DCD (9)
|
|
#define IRQ_MFP_CTS (10)
|
|
#define IRQ_MFP_GPU (11)
|
|
#define IRQ_MFP_TIMD (12)
|
|
#define IRQ_MFP_TIMC (13)
|
|
#define IRQ_MFP_ACIA (14)
|
|
#define IRQ_MFP_FDC (15)
|
|
#define IRQ_MFP_ACSI IRQ_MFP_FDC
|
|
#define IRQ_MFP_FSCSI IRQ_MFP_FDC
|
|
#define IRQ_MFP_IDE IRQ_MFP_FDC
|
|
#define IRQ_MFP_TIMB (16)
|
|
#define IRQ_MFP_SERERR (17)
|
|
#define IRQ_MFP_SEREMPT (18)
|
|
#define IRQ_MFP_RECERR (19)
|
|
#define IRQ_MFP_RECFULL (20)
|
|
#define IRQ_MFP_TIMA (21)
|
|
#define IRQ_MFP_RI (22)
|
|
#define IRQ_MFP_MMD (23)
|
|
|
|
/* TT-MFP interrupts */
|
|
#define IRQ_TT_MFP_IO0 (24)
|
|
#define IRQ_TT_MFP_IO1 (25)
|
|
#define IRQ_TT_MFP_SCC (26)
|
|
#define IRQ_TT_MFP_RI (27)
|
|
#define IRQ_TT_MFP_TIMD (28)
|
|
#define IRQ_TT_MFP_TIMC (29)
|
|
#define IRQ_TT_MFP_DRVRDY (30)
|
|
#define IRQ_TT_MFP_SCSIDMA (31)
|
|
#define IRQ_TT_MFP_TIMB (32)
|
|
#define IRQ_TT_MFP_SERERR (33)
|
|
#define IRQ_TT_MFP_SEREMPT (34)
|
|
#define IRQ_TT_MFP_RECERR (35)
|
|
#define IRQ_TT_MFP_RECFULL (36)
|
|
#define IRQ_TT_MFP_TIMA (37)
|
|
#define IRQ_TT_MFP_RTC (38)
|
|
#define IRQ_TT_MFP_SCSI (39)
|
|
|
|
/* SCC interrupts */
|
|
#define IRQ_SCCB_TX (40)
|
|
#define IRQ_SCCB_STAT (42)
|
|
#define IRQ_SCCB_RX (44)
|
|
#define IRQ_SCCB_SPCOND (46)
|
|
#define IRQ_SCCA_TX (48)
|
|
#define IRQ_SCCA_STAT (50)
|
|
#define IRQ_SCCA_RX (52)
|
|
#define IRQ_SCCA_SPCOND (54)
|
|
|
|
/* shared MFP timer D interrupts - hires timer for EtherNEC et al. */
|
|
#define IRQ_MFP_TIMER1 (64)
|
|
#define IRQ_MFP_TIMER2 (65)
|
|
#define IRQ_MFP_TIMER3 (66)
|
|
#define IRQ_MFP_TIMER4 (67)
|
|
#define IRQ_MFP_TIMER5 (68)
|
|
#define IRQ_MFP_TIMER6 (69)
|
|
#define IRQ_MFP_TIMER7 (70)
|
|
#define IRQ_MFP_TIMER8 (71)
|
|
|
|
#define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */
|
|
#define INT_TICKS 246 /* to make sched_time = 99.902... HZ */
|
|
|
|
|
|
#define MFP_ENABLE 0
|
|
#define MFP_PENDING 1
|
|
#define MFP_SERVICE 2
|
|
#define MFP_MASK 3
|
|
|
|
/* Utility functions for setting/clearing bits in the interrupt registers of
|
|
* the MFP. 'type' should be constant, if 'irq' is constant, too, code size is
|
|
* reduced. set_mfp_bit() is nonsense for PENDING and SERVICE registers. */
|
|
|
|
static inline int get_mfp_bit( unsigned irq, int type )
|
|
|
|
{ unsigned char mask, *reg;
|
|
|
|
mask = 1 << (irq & 7);
|
|
reg = (unsigned char *)&st_mfp.int_en_a + type*4 +
|
|
((irq & 8) >> 2) + (((irq-8) & 16) << 3);
|
|
return( *reg & mask );
|
|
}
|
|
|
|
static inline void set_mfp_bit( unsigned irq, int type )
|
|
|
|
{ unsigned char mask, *reg;
|
|
|
|
mask = 1 << (irq & 7);
|
|
reg = (unsigned char *)&st_mfp.int_en_a + type*4 +
|
|
((irq & 8) >> 2) + (((irq-8) & 16) << 3);
|
|
__asm__ __volatile__ ( "orb %0,%1"
|
|
: : "di" (mask), "m" (*reg) : "memory" );
|
|
}
|
|
|
|
static inline void clear_mfp_bit( unsigned irq, int type )
|
|
|
|
{ unsigned char mask, *reg;
|
|
|
|
mask = ~(1 << (irq & 7));
|
|
reg = (unsigned char *)&st_mfp.int_en_a + type*4 +
|
|
((irq & 8) >> 2) + (((irq-8) & 16) << 3);
|
|
if (type == MFP_PENDING || type == MFP_SERVICE)
|
|
__asm__ __volatile__ ( "moveb %0,%1"
|
|
: : "di" (mask), "m" (*reg) : "memory" );
|
|
else
|
|
__asm__ __volatile__ ( "andb %0,%1"
|
|
: : "di" (mask), "m" (*reg) : "memory" );
|
|
}
|
|
|
|
/*
|
|
* {en,dis}able_irq have the usual semantics of temporary blocking the
|
|
* interrupt, but not losing requests that happen between disabling and
|
|
* enabling. This is done with the MFP mask registers.
|
|
*/
|
|
|
|
static inline void atari_enable_irq( unsigned irq )
|
|
|
|
{
|
|
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
|
|
set_mfp_bit( irq, MFP_MASK );
|
|
}
|
|
|
|
static inline void atari_disable_irq( unsigned irq )
|
|
|
|
{
|
|
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
|
|
clear_mfp_bit( irq, MFP_MASK );
|
|
}
|
|
|
|
/*
|
|
* In opposite to {en,dis}able_irq, requests between turn{off,on}_irq are not
|
|
* "stored"
|
|
*/
|
|
|
|
static inline void atari_turnon_irq( unsigned irq )
|
|
|
|
{
|
|
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
|
|
set_mfp_bit( irq, MFP_ENABLE );
|
|
}
|
|
|
|
static inline void atari_turnoff_irq( unsigned irq )
|
|
|
|
{
|
|
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
|
|
clear_mfp_bit( irq, MFP_ENABLE );
|
|
clear_mfp_bit( irq, MFP_PENDING );
|
|
}
|
|
|
|
static inline void atari_clear_pending_irq( unsigned irq )
|
|
|
|
{
|
|
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
|
|
clear_mfp_bit( irq, MFP_PENDING );
|
|
}
|
|
|
|
static inline int atari_irq_pending( unsigned irq )
|
|
|
|
{
|
|
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return( 0 );
|
|
return( get_mfp_bit( irq, MFP_PENDING ) );
|
|
}
|
|
|
|
unsigned int atari_register_vme_int(void);
|
|
void atari_unregister_vme_int(unsigned int);
|
|
|
|
#endif /* linux/atariints.h */
|