149148020SSam Ravnborg /* 249148020SSam Ravnborg ** atariints.h -- Atari Linux interrupt handling structs and prototypes 349148020SSam Ravnborg ** 449148020SSam Ravnborg ** Copyright 1994 by Björn Brauel 549148020SSam Ravnborg ** 649148020SSam Ravnborg ** 5/2/94 Roman Hodek: 749148020SSam Ravnborg ** TT interrupt definitions added. 849148020SSam Ravnborg ** 949148020SSam Ravnborg ** 12/02/96: (Roman) 1049148020SSam Ravnborg ** Adapted to new int handling scheme (see ataints.c); revised numbering 1149148020SSam Ravnborg ** 1249148020SSam Ravnborg ** This file is subject to the terms and conditions of the GNU General Public 1349148020SSam Ravnborg ** License. See the file COPYING in the main directory of this archive 1449148020SSam Ravnborg ** for more details. 1549148020SSam Ravnborg ** 1649148020SSam Ravnborg */ 1749148020SSam Ravnborg 1849148020SSam Ravnborg #ifndef _LINUX_ATARIINTS_H_ 1949148020SSam Ravnborg #define _LINUX_ATARIINTS_H_ 2049148020SSam Ravnborg 2149148020SSam Ravnborg #include <asm/irq.h> 2249148020SSam Ravnborg #include <asm/atarihw.h> 2349148020SSam Ravnborg 2449148020SSam Ravnborg /* 2549148020SSam Ravnborg ** Atari Interrupt sources. 2649148020SSam Ravnborg ** 2749148020SSam Ravnborg */ 2849148020SSam Ravnborg 2949148020SSam Ravnborg #define STMFP_SOURCE_BASE 8 3049148020SSam Ravnborg #define TTMFP_SOURCE_BASE 24 3149148020SSam Ravnborg #define SCC_SOURCE_BASE 40 3249148020SSam Ravnborg #define VME_SOURCE_BASE 56 3349148020SSam Ravnborg #define VME_MAX_SOURCES 16 3449148020SSam Ravnborg 3549148020SSam Ravnborg #define NUM_ATARI_SOURCES (VME_SOURCE_BASE+VME_MAX_SOURCES-STMFP_SOURCE_BASE) 3649148020SSam Ravnborg 3749148020SSam Ravnborg /* convert vector number to int source number */ 3849148020SSam Ravnborg #define IRQ_VECTOR_TO_SOURCE(v) ((v) - ((v) < 0x20 ? 0x18 : (0x40-8))) 3949148020SSam Ravnborg 4049148020SSam Ravnborg /* convert irq_handler index to vector number */ 4149148020SSam Ravnborg #define IRQ_SOURCE_TO_VECTOR(i) ((i) + ((i) < 8 ? 0x18 : (0x40-8))) 4249148020SSam Ravnborg 4349148020SSam Ravnborg /* interrupt service types */ 4449148020SSam Ravnborg #define IRQ_TYPE_SLOW 0 4549148020SSam Ravnborg #define IRQ_TYPE_FAST 1 4649148020SSam Ravnborg #define IRQ_TYPE_PRIO 2 4749148020SSam Ravnborg 4849148020SSam Ravnborg /* ST-MFP interrupts */ 4949148020SSam Ravnborg #define IRQ_MFP_BUSY (8) 5049148020SSam Ravnborg #define IRQ_MFP_DCD (9) 5149148020SSam Ravnborg #define IRQ_MFP_CTS (10) 5249148020SSam Ravnborg #define IRQ_MFP_GPU (11) 5349148020SSam Ravnborg #define IRQ_MFP_TIMD (12) 5449148020SSam Ravnborg #define IRQ_MFP_TIMC (13) 5549148020SSam Ravnborg #define IRQ_MFP_ACIA (14) 5649148020SSam Ravnborg #define IRQ_MFP_FDC (15) 5749148020SSam Ravnborg #define IRQ_MFP_ACSI IRQ_MFP_FDC 5849148020SSam Ravnborg #define IRQ_MFP_FSCSI IRQ_MFP_FDC 5949148020SSam Ravnborg #define IRQ_MFP_IDE IRQ_MFP_FDC 6049148020SSam Ravnborg #define IRQ_MFP_TIMB (16) 6149148020SSam Ravnborg #define IRQ_MFP_SERERR (17) 6249148020SSam Ravnborg #define IRQ_MFP_SEREMPT (18) 6349148020SSam Ravnborg #define IRQ_MFP_RECERR (19) 6449148020SSam Ravnborg #define IRQ_MFP_RECFULL (20) 6549148020SSam Ravnborg #define IRQ_MFP_TIMA (21) 6649148020SSam Ravnborg #define IRQ_MFP_RI (22) 6749148020SSam Ravnborg #define IRQ_MFP_MMD (23) 6849148020SSam Ravnborg 6949148020SSam Ravnborg /* TT-MFP interrupts */ 7049148020SSam Ravnborg #define IRQ_TT_MFP_IO0 (24) 7149148020SSam Ravnborg #define IRQ_TT_MFP_IO1 (25) 7249148020SSam Ravnborg #define IRQ_TT_MFP_SCC (26) 7349148020SSam Ravnborg #define IRQ_TT_MFP_RI (27) 7449148020SSam Ravnborg #define IRQ_TT_MFP_TIMD (28) 7549148020SSam Ravnborg #define IRQ_TT_MFP_TIMC (29) 7649148020SSam Ravnborg #define IRQ_TT_MFP_DRVRDY (30) 7749148020SSam Ravnborg #define IRQ_TT_MFP_SCSIDMA (31) 7849148020SSam Ravnborg #define IRQ_TT_MFP_TIMB (32) 7949148020SSam Ravnborg #define IRQ_TT_MFP_SERERR (33) 8049148020SSam Ravnborg #define IRQ_TT_MFP_SEREMPT (34) 8149148020SSam Ravnborg #define IRQ_TT_MFP_RECERR (35) 8249148020SSam Ravnborg #define IRQ_TT_MFP_RECFULL (36) 8349148020SSam Ravnborg #define IRQ_TT_MFP_TIMA (37) 8449148020SSam Ravnborg #define IRQ_TT_MFP_RTC (38) 8549148020SSam Ravnborg #define IRQ_TT_MFP_SCSI (39) 8649148020SSam Ravnborg 8749148020SSam Ravnborg /* SCC interrupts */ 8849148020SSam Ravnborg #define IRQ_SCCB_TX (40) 8949148020SSam Ravnborg #define IRQ_SCCB_STAT (42) 9049148020SSam Ravnborg #define IRQ_SCCB_RX (44) 9149148020SSam Ravnborg #define IRQ_SCCB_SPCOND (46) 9249148020SSam Ravnborg #define IRQ_SCCA_TX (48) 9349148020SSam Ravnborg #define IRQ_SCCA_STAT (50) 9449148020SSam Ravnborg #define IRQ_SCCA_RX (52) 9549148020SSam Ravnborg #define IRQ_SCCA_SPCOND (54) 9649148020SSam Ravnborg 9749148020SSam Ravnborg 9849148020SSam Ravnborg #define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */ 9949148020SSam Ravnborg #define INT_TICKS 246 /* to make sched_time = 99.902... HZ */ 10049148020SSam Ravnborg 10149148020SSam Ravnborg 10249148020SSam Ravnborg #define MFP_ENABLE 0 10349148020SSam Ravnborg #define MFP_PENDING 1 10449148020SSam Ravnborg #define MFP_SERVICE 2 10549148020SSam Ravnborg #define MFP_MASK 3 10649148020SSam Ravnborg 10749148020SSam Ravnborg /* Utility functions for setting/clearing bits in the interrupt registers of 10849148020SSam Ravnborg * the MFP. 'type' should be constant, if 'irq' is constant, too, code size is 10949148020SSam Ravnborg * reduced. set_mfp_bit() is nonsense for PENDING and SERVICE registers. */ 11049148020SSam Ravnborg 11149148020SSam Ravnborg static inline int get_mfp_bit( unsigned irq, int type ) 11249148020SSam Ravnborg 11349148020SSam Ravnborg { unsigned char mask, *reg; 11449148020SSam Ravnborg 11549148020SSam Ravnborg mask = 1 << (irq & 7); 1163d92e8f3SGeert Uytterhoeven reg = (unsigned char *)&st_mfp.int_en_a + type*4 + 11749148020SSam Ravnborg ((irq & 8) >> 2) + (((irq-8) & 16) << 3); 11849148020SSam Ravnborg return( *reg & mask ); 11949148020SSam Ravnborg } 12049148020SSam Ravnborg 12149148020SSam Ravnborg static inline void set_mfp_bit( unsigned irq, int type ) 12249148020SSam Ravnborg 12349148020SSam Ravnborg { unsigned char mask, *reg; 12449148020SSam Ravnborg 12549148020SSam Ravnborg mask = 1 << (irq & 7); 1263d92e8f3SGeert Uytterhoeven reg = (unsigned char *)&st_mfp.int_en_a + type*4 + 12749148020SSam Ravnborg ((irq & 8) >> 2) + (((irq-8) & 16) << 3); 12849148020SSam Ravnborg __asm__ __volatile__ ( "orb %0,%1" 12949148020SSam Ravnborg : : "di" (mask), "m" (*reg) : "memory" ); 13049148020SSam Ravnborg } 13149148020SSam Ravnborg 13249148020SSam Ravnborg static inline void clear_mfp_bit( unsigned irq, int type ) 13349148020SSam Ravnborg 13449148020SSam Ravnborg { unsigned char mask, *reg; 13549148020SSam Ravnborg 13649148020SSam Ravnborg mask = ~(1 << (irq & 7)); 1373d92e8f3SGeert Uytterhoeven reg = (unsigned char *)&st_mfp.int_en_a + type*4 + 13849148020SSam Ravnborg ((irq & 8) >> 2) + (((irq-8) & 16) << 3); 13949148020SSam Ravnborg if (type == MFP_PENDING || type == MFP_SERVICE) 14049148020SSam Ravnborg __asm__ __volatile__ ( "moveb %0,%1" 14149148020SSam Ravnborg : : "di" (mask), "m" (*reg) : "memory" ); 14249148020SSam Ravnborg else 14349148020SSam Ravnborg __asm__ __volatile__ ( "andb %0,%1" 14449148020SSam Ravnborg : : "di" (mask), "m" (*reg) : "memory" ); 14549148020SSam Ravnborg } 14649148020SSam Ravnborg 14749148020SSam Ravnborg /* 14849148020SSam Ravnborg * {en,dis}able_irq have the usual semantics of temporary blocking the 14925985edcSLucas De Marchi * interrupt, but not losing requests that happen between disabling and 15049148020SSam Ravnborg * enabling. This is done with the MFP mask registers. 15149148020SSam Ravnborg */ 15249148020SSam Ravnborg 15349148020SSam Ravnborg static inline void atari_enable_irq( unsigned irq ) 15449148020SSam Ravnborg 15549148020SSam Ravnborg { 15649148020SSam Ravnborg if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; 15749148020SSam Ravnborg set_mfp_bit( irq, MFP_MASK ); 15849148020SSam Ravnborg } 15949148020SSam Ravnborg 16049148020SSam Ravnborg static inline void atari_disable_irq( unsigned irq ) 16149148020SSam Ravnborg 16249148020SSam Ravnborg { 16349148020SSam Ravnborg if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; 16449148020SSam Ravnborg clear_mfp_bit( irq, MFP_MASK ); 16549148020SSam Ravnborg } 16649148020SSam Ravnborg 16749148020SSam Ravnborg /* 16849148020SSam Ravnborg * In opposite to {en,dis}able_irq, requests between turn{off,on}_irq are not 16949148020SSam Ravnborg * "stored" 17049148020SSam Ravnborg */ 17149148020SSam Ravnborg 17249148020SSam Ravnborg static inline void atari_turnon_irq( unsigned irq ) 17349148020SSam Ravnborg 17449148020SSam Ravnborg { 17549148020SSam Ravnborg if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; 17649148020SSam Ravnborg set_mfp_bit( irq, MFP_ENABLE ); 17749148020SSam Ravnborg } 17849148020SSam Ravnborg 17949148020SSam Ravnborg static inline void atari_turnoff_irq( unsigned irq ) 18049148020SSam Ravnborg 18149148020SSam Ravnborg { 18249148020SSam Ravnborg if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; 18349148020SSam Ravnborg clear_mfp_bit( irq, MFP_ENABLE ); 18449148020SSam Ravnborg clear_mfp_bit( irq, MFP_PENDING ); 18549148020SSam Ravnborg } 18649148020SSam Ravnborg 18749148020SSam Ravnborg static inline void atari_clear_pending_irq( unsigned irq ) 18849148020SSam Ravnborg 18949148020SSam Ravnborg { 19049148020SSam Ravnborg if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return; 19149148020SSam Ravnborg clear_mfp_bit( irq, MFP_PENDING ); 19249148020SSam Ravnborg } 19349148020SSam Ravnborg 19449148020SSam Ravnborg static inline int atari_irq_pending( unsigned irq ) 19549148020SSam Ravnborg 19649148020SSam Ravnborg { 19749148020SSam Ravnborg if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return( 0 ); 19849148020SSam Ravnborg return( get_mfp_bit( irq, MFP_PENDING ) ); 19949148020SSam Ravnborg } 20049148020SSam Ravnborg 20149148020SSam Ravnborg unsigned long atari_register_vme_int( void ); 20249148020SSam Ravnborg void atari_unregister_vme_int( unsigned long ); 20349148020SSam Ravnborg 20449148020SSam Ravnborg #endif /* linux/atariints.h */ 205