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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-m68k/] [atariints.h] - Rev 1782
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/* ** atariints.h -- Atari Linux interrupt handling structs and prototypes ** ** Copyright 1994 by Bj”rn 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 (VME_SOURCE_BASE+VME_MAX_SOURCES-STMFP_SOURCE_BASE) /* 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))) /* interrupt service types */ #define IRQ_TYPE_SLOW 0 #define IRQ_TYPE_FAST 1 #define IRQ_TYPE_PRIO 2 #define IRQ_SPURIOUS (IRQ_MACHSPEC | 0) /* auto-vector interrupts */ #define IRQ_AUTO_1 (IRQ_MACHSPEC | 1) #define IRQ_AUTO_2 (IRQ_MACHSPEC | 2) #define IRQ_AUTO_3 (IRQ_MACHSPEC | 3) #define IRQ_AUTO_4 (IRQ_MACHSPEC | 4) #define IRQ_AUTO_5 (IRQ_MACHSPEC | 5) #define IRQ_AUTO_6 (IRQ_MACHSPEC | 6) #define IRQ_AUTO_7 (IRQ_MACHSPEC | 7) /* ST-MFP interrupts */ #define IRQ_MFP_BUSY (IRQ_MACHSPEC | 8) #define IRQ_MFP_DCD (IRQ_MACHSPEC | 9) #define IRQ_MFP_CTS (IRQ_MACHSPEC | 10) #define IRQ_MFP_GPU (IRQ_MACHSPEC | 11) #define IRQ_MFP_TIMD (IRQ_MACHSPEC | 12) #define IRQ_MFP_TIMC (IRQ_MACHSPEC | 13) #define IRQ_MFP_ACIA (IRQ_MACHSPEC | 14) #define IRQ_MFP_FDC (IRQ_MACHSPEC | 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 (IRQ_MACHSPEC | 16) #define IRQ_MFP_SERERR (IRQ_MACHSPEC | 17) #define IRQ_MFP_SEREMPT (IRQ_MACHSPEC | 18) #define IRQ_MFP_RECERR (IRQ_MACHSPEC | 19) #define IRQ_MFP_RECFULL (IRQ_MACHSPEC | 20) #define IRQ_MFP_TIMA (IRQ_MACHSPEC | 21) #define IRQ_MFP_RI (IRQ_MACHSPEC | 22) #define IRQ_MFP_MMD (IRQ_MACHSPEC | 23) /* TT-MFP interrupts */ #define IRQ_TT_MFP_IO0 (IRQ_MACHSPEC | 24) #define IRQ_TT_MFP_IO1 (IRQ_MACHSPEC | 25) #define IRQ_TT_MFP_SCC (IRQ_MACHSPEC | 26) #define IRQ_TT_MFP_RI (IRQ_MACHSPEC | 27) #define IRQ_TT_MFP_TIMD (IRQ_MACHSPEC | 28) #define IRQ_TT_MFP_TIMC (IRQ_MACHSPEC | 29) #define IRQ_TT_MFP_DRVRDY (IRQ_MACHSPEC | 30) #define IRQ_TT_MFP_SCSIDMA (IRQ_MACHSPEC | 31) #define IRQ_TT_MFP_TIMB (IRQ_MACHSPEC | 32) #define IRQ_TT_MFP_SERERR (IRQ_MACHSPEC | 33) #define IRQ_TT_MFP_SEREMPT (IRQ_MACHSPEC | 34) #define IRQ_TT_MFP_RECERR (IRQ_MACHSPEC | 35) #define IRQ_TT_MFP_RECFULL (IRQ_MACHSPEC | 36) #define IRQ_TT_MFP_TIMA (IRQ_MACHSPEC | 37) #define IRQ_TT_MFP_RTC (IRQ_MACHSPEC | 38) #define IRQ_TT_MFP_SCSI (IRQ_MACHSPEC | 39) /* SCC interrupts */ #define IRQ_SCCB_TX (IRQ_MACHSPEC | 40) #define IRQ_SCCB_STAT (IRQ_MACHSPEC | 42) #define IRQ_SCCB_RX (IRQ_MACHSPEC | 44) #define IRQ_SCCB_SPCOND (IRQ_MACHSPEC | 46) #define IRQ_SCCA_TX (IRQ_MACHSPEC | 48) #define IRQ_SCCA_STAT (IRQ_MACHSPEC | 50) #define IRQ_SCCA_RX (IRQ_MACHSPEC | 52) #define IRQ_SCCA_SPCOND (IRQ_MACHSPEC | 54) #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 *)&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 *)&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 *)&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 loosing requests that happen between disabling and * enabling. This is done with the MFP mask registers. */ static inline void atari_enable_irq( unsigned irq ) { irq &= ~IRQ_MACHSPEC; if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; set_mfp_bit( irq, MFP_MASK ); } static inline void atari_disable_irq( unsigned irq ) { irq &= ~IRQ_MACHSPEC; 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" */ extern inline void atari_turnon_irq( unsigned irq ) { irq &= ~IRQ_MACHSPEC; if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; set_mfp_bit( irq, MFP_ENABLE ); } extern inline void atari_turnoff_irq( unsigned irq ) { irq &= ~IRQ_MACHSPEC; if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; clear_mfp_bit( irq, MFP_ENABLE ); clear_mfp_bit( irq, MFP_PENDING ); } extern inline void atari_clear_pending_irq( unsigned irq ) { irq &= ~IRQ_MACHSPEC; if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; clear_mfp_bit( irq, MFP_PENDING ); } extern inline int atari_irq_pending( unsigned irq ) { irq &= ~IRQ_MACHSPEC; if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return( 0 ); return( get_mfp_bit( irq, MFP_PENDING ) ); } unsigned long atari_register_vme_int( void ); #endif /* linux/atariints.h */