patch-1.3.94 linux/include/asm-m68k/atariints.h

• Lines: 221
• Date: Mon Mar 4 22:47:32 1996
• Orig file: v1.3.93/linux/include/asm-m68k/atariints.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.93/linux/include/asm-m68k/atariints.h linux/include/asm-m68k/atariints.h
@@ -0,0 +1,220 @@
+/*
+** atariints.h -- Atari Linux interrupt handling structs and prototypes
+**
+** Copyright 1994 by Bj”rn Brauel
+**
+** 5/2/94 Roman Hodek:
+**   TT interupt 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 README.legal 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_SUPRIOUS      (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 */