/*** 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 */