/* [<][>][^][v][top][bottom][index][help] */
/*
** 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>
/* Setting this prints debugging info for unclaimed interrupts */
#define DEBUG_SPURIOUS
/* Setting this prints debugging info on each autovector interrupt */
/* #define DEBUG_IRQS */
/* Setting this prints debugging info on each Nubus interrupt */
/* #define DEBUG_NUBUS_INT */
/* Setting this prints debugging info on irqs as they enabled and disabled. */
/* #define DEBUG_IRQUSE */
/*
* Base IRQ number for all Mac68K interrupt sources. Each source
* has eight indexes (base -> base+7).
*/
#define VIA1_SOURCE_BASE 8
#define VIA2_SOURCE_BASE 16
#define MAC_SCC_SOURCE_BASE 24
#define PSC3_SOURCE_BASE 24
#define PSC4_SOURCE_BASE 32
#define PSC5_SOURCE_BASE 40
#define PSC6_SOURCE_BASE 48
#define NUBUS_SOURCE_BASE 56
#define BABOON_SOURCE_BASE 64
/*
* Maximum IRQ number is BABOON_SOURCE_BASE + 7,
* giving us IRQs up through 71
*/
#define NUM_MAC_SOURCES 72
/*
* clean way to separate IRQ into its source and index
*/
#define IRQ_SRC(irq) (irq >> 3)
#define IRQ_IDX(irq) (irq & 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/RBV 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)
/* 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_SCCA (33)
#define IRQ_SCCB (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_9 (56)
#define IRQ_NUBUS_A (57)
#define IRQ_NUBUS_B (58)
#define IRQ_NUBUS_C (59)
#define IRQ_NUBUS_D (60)
#define IRQ_NUBUS_E (61)
#define IRQ_NUBUS_F (62)
/* Baboon interrupts (cascaded to nubus slot $C) */
#define IRQ_BABOON_0 (64)
#define IRQ_BABOON_1 (65)
#define IRQ_BABOON_2 (66)
#define IRQ_BABOON_3 (67)
#define SLOT2IRQ(x) (x + 47)
#define IRQ2SLOT(x) (x - 47)
#define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */
#define INT_TICKS 246 /* to make sched_time = 99.902... HZ */
#endif /* asm/macints.h */