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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209/*** 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 */