--- /dev/null
+/*
+** 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 */
Code Review / kvmfornfv.git / blobdiff