1 files changed, 215 insertions, 0 deletions

diff --git a/include/asm-m68k/atariints.h b/include/asm-m68k/atariints.h
new file mode 100644
index 000000000000..42952c890593
--- /dev/null
+++ b/include/asm-m68k/atariints.h
@@ -0,0 +1,215 @@
+/*
+** 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      (0)
+
+/* auto-vector interrupts */
+#define IRQ_AUTO_1        (1)
+#define IRQ_AUTO_2        (2)
+#define IRQ_AUTO_3        (3)
+#define IRQ_AUTO_4        (4)
+#define IRQ_AUTO_5        (5)
+#define IRQ_AUTO_6        (6)
+#define IRQ_AUTO_7        (7)
+
+/* 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)
+
+
+#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 )
+
+{
+        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 long atari_register_vme_int( void );
+void atari_unregister_vme_int( unsigned long );
+
+#endif /* linux/atariints.h */