home *** CD-ROM | disk | FTP | other *** search
- /*
- ** macints.h -- Macintosh Linux interrupt handling structs and prototypes
- **
- ** Copyright 1997 by Michael Schmitz
- **
- ** 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 _ASM_MACINTS_H_
- #define _ASM_MACINTS_H_
-
- #include <asm/irq.h>
-
- /*
- ** Macintosh Interrupt sources.
- **
- ** Note: these are all routed via the generic VIA interrupt routine!
- **
- */
-
- #define SRC_VIA1 0
- #define SRC_VIA2 1
-
- #define VIA1_SOURCE_BASE 8
- #define VIA2_SOURCE_BASE 16
- #define RBV_SOURCE_BASE 24
- #define MAC_SCC_SOURCE_BASE 32
- #define NUBUS_SOURCE_BASE 56
- #define NUBUS_MAX_SOURCES 8
-
- /* FIXME: sources not contigous ... */
- #define NUM_MAC_SOURCES (NUBUS_SOURCE_BASE+NUBUS_MAX_SOURCES-VIA1_SOURCE_BASE)
-
- #define IRQ_SRC_MASK (VIA1_SOURCE_BASE|VIA2_SOURCE_BASE|MAC_SCC_SOURCE_BASE)
- #define IRQ_IDX_MASK 7
-
- /*
- * quick hack to adapt old MACHSPEC-aware source
- */
- #define IRQ_IDX(irq) (irq)
-
- /* 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)
-
- /* VIA1 interrupts */
- #define IRQ_VIA1_0 (8) /* one second int. */
- #define IRQ_VIA1_1 (9) /* VBlank int. */
- #define IRQ_MAC_VBL IRQ_VIA1_1
- #define IRQ_VIA1_2 (10) /* ADB SR shifts complete */
- #define IRQ_MAC_ADB IRQ_VIA1_2
- #define IRQ_MAC_ADB_SR IRQ_VIA1_2
- #define IRQ_VIA1_3 (11) /* ADB SR CB2 ?? */
- #define IRQ_MAC_ADB_SD IRQ_VIA1_3
- #define IRQ_VIA1_4 (12) /* ADB SR ext. clock pulse */
- #define IRQ_MAC_ADB_CL IRQ_VIA1_4
- #define IRQ_VIA1_5 (13)
- #define IRQ_MAC_TIMER_2 IRQ_VIA1_5
- #define IRQ_VIA1_6 (14)
- #define IRQ_MAC_TIMER_1 IRQ_VIA1_6
- #define IRQ_VIA1_7 (15)
-
- /* VIA2 interrupts */
- #define IRQ_VIA2_0 (16)
- #define IRQ_MAC_SCSIDRQ IRQ_VIA2_0
- #define IRQ_VIA2_1 (17)
- #define IRQ_MAC_NUBUS IRQ_VIA2_1
- #define IRQ_VIA2_2 (18)
- #define IRQ_VIA2_3 (19)
- #define IRQ_MAC_SCSI IRQ_VIA2_3
- #define IRQ_VIA2_4 (20)
- #define IRQ_VIA2_5 (21)
- #define IRQ_VIA2_6 (22)
- #define IRQ_VIA2_7 (23)
-
- #if 0
- /* RBV interrupts */
- #define IRQ_RBV_0 (24)
- #define IRQ_RBV_1 (25)
- #define IRQ_RBV_2 (26)
- #define IRQ_RBV_3 (27)
- #define IRQ_RBV_4 (28)
- #define IRQ_RBV_5 (29)
- #define IRQ_RBV_6 (30)
- #define IRQ_RBV_7 (31)
- #endif
-
- /* Level 3 (PSC, AV Macs only) interrupts */
- #define IRQ_PSC3_0 (24)
- #define IRQ_MAC_MACE IRQ_PSC3_0
- #define IRQ_PSC3_1 (25)
- #define IRQ_PSC3_2 (26)
- #define IRQ_PSC3_3 (27)
-
- /* Level 4 (SCC) interrupts */
- #define IRQ_SCC (32)
- #define IRQ_SCCB (33)
- #define IRQ_SCCA (34)
- #if 0 /* FIXME: are there multiple interrupt conditions on the SCC ?? */
- /* SCC interrupts */
- #define IRQ_SCCB_TX (32)
- #define IRQ_SCCB_STAT (33)
- #define IRQ_SCCB_RX (34)
- #define IRQ_SCCB_SPCOND (35)
- #define IRQ_SCCA_TX (36)
- #define IRQ_SCCA_STAT (37)
- #define IRQ_SCCA_RX (38)
- #define IRQ_SCCA_SPCOND (39)
- #endif
-
- /* Level 4 (PSC, AV Macs only) interrupts */
- #define IRQ_PSC4_0 (32)
- #define IRQ_PSC4_1 (33)
- #define IRQ_PSC4_2 (34)
- #define IRQ_PSC4_3 (35)
- #define IRQ_MAC_MACE_DMA IRQ_PSC4_3
-
- /* Level 5 (PSC, AV Macs only) interrupts */
- #define IRQ_PSC5_0 (40)
- #define IRQ_PSC5_1 (41)
- #define IRQ_PSC5_2 (42)
- #define IRQ_PSC5_3 (43)
-
- /* Level 6 (PSC, AV Macs only) interrupts */
- #define IRQ_PSC6_0 (48)
- #define IRQ_PSC6_1 (49)
- #define IRQ_PSC6_2 (50)
- #define IRQ_PSC6_3 (51)
-
- /* Nubus interrupts (cascaded to VIA2) */
- #define IRQ_NUBUS_1 (56)
-
- #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 VIA_ENABLE 0
- #define VIA_PENDING 1
- #define VIA_SERVICE 2
- #define VIA_MASK 3
-
- /*
- * Utility functions for setting/clearing bits in the interrupt registers of
- * the VIA.
- */
-
- void mac_enable_irq( unsigned irq );
- void mac_disable_irq( unsigned irq );
- void mac_turnon_irq( unsigned irq );
- void mac_turnoff_irq( unsigned irq );
- void mac_clear_pending_irq( unsigned irq );
- int mac_irq_pending( unsigned irq );
- int nubus_request_irq(int slot, void *dev_id, void (*handler)(int,void *,struct pt_regs *));
- int nubus_free_irq(int slot);
-
- unsigned long mac_register_nubus_int( void );
- void mac_unregister_nubus_int( unsigned long );
-
- extern void mac_default_handler(int irq, void *dev_id, struct pt_regs *regs);
- extern void via1_irq(int irq, void *dev_id, struct pt_regs *regs);
- extern void via2_irq(int irq, void *dev_id, struct pt_regs *regs);
- extern void rbv_irq(int irq, void *dev_id, struct pt_regs *regs);
- extern void mac_bang(int irq, void *dev_id, struct pt_regs *regs);
-
- extern void mac_SCC_handler(int irq, void *dev_id, struct pt_regs *regs);
-
- #endif /* asm/macints.h */
-