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/*
** 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 */
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