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da3fb3c9aa
The IOP driver calls into the OSS driver to enable its IRQ. This undesirable coupling between drivers only exists because the OSS driver doesn't correctly handle all of its machspec IRQs. Fix OSS handling of enable/disable for VIA1 IRQs (8 thru 15) which includes MAC_IRQ_ADB. Back when I implemented pmac_zilog support I redefined IRQ_MAC_SCC incorrectly. Change this to a machspec IRQ so that it works on OSS. Clean up the unused OSS audio IRQ and OSS_IRQLEV_* cruft that only confuses things. Fix the OSS description in macints.c and remove an obsolete comment. Don't enable the VIA1 irq before registering the handler. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*
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** macints.h -- Macintosh Linux interrupt handling structs and prototypes
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**
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** Copyright 1997 by Michael Schmitz
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**
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** This file is subject to the terms and conditions of the GNU General Public
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** License. See the file COPYING in the main directory of this archive
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** for more details.
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**
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*/
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#ifndef _ASM_MACINTS_H_
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#define _ASM_MACINTS_H_
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#include <asm/irq.h>
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/* Setting this prints debugging info for unclaimed interrupts */
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#define DEBUG_SPURIOUS
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/* Setting this prints debugging info on each autovector interrupt */
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/* #define DEBUG_IRQS */
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/* Setting this prints debugging info on each Nubus interrupt */
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/* #define DEBUG_NUBUS_INT */
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/* Setting this prints debugging info on irqs as they enabled and disabled. */
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/* #define DEBUG_IRQUSE */
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/*
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* Base IRQ number for all Mac68K interrupt sources. Each source
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* has eight indexes (base -> base+7).
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*/
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#define VIA1_SOURCE_BASE 8
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#define VIA2_SOURCE_BASE 16
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#define PSC3_SOURCE_BASE 24
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#define PSC4_SOURCE_BASE 32
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#define PSC5_SOURCE_BASE 40
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#define PSC6_SOURCE_BASE 48
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#define NUBUS_SOURCE_BASE 56
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#define BABOON_SOURCE_BASE 64
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/*
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* Maximum IRQ number is BABOON_SOURCE_BASE + 7,
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* giving us IRQs up through 71
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*/
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#define NUM_MAC_SOURCES 72
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/*
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* clean way to separate IRQ into its source and index
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*/
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#define IRQ_SRC(irq) (irq >> 3)
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#define IRQ_IDX(irq) (irq & 7)
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/* VIA1 interrupts */
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#define IRQ_VIA1_0 (8) /* one second int. */
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#define IRQ_VIA1_1 (9) /* VBlank int. */
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#define IRQ_MAC_VBL IRQ_VIA1_1
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#define IRQ_VIA1_2 (10) /* ADB SR shifts complete */
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#define IRQ_MAC_ADB IRQ_VIA1_2
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#define IRQ_MAC_ADB_SR IRQ_VIA1_2
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#define IRQ_VIA1_3 (11) /* ADB SR CB2 ?? */
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#define IRQ_MAC_ADB_SD IRQ_VIA1_3
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#define IRQ_VIA1_4 (12) /* ADB SR ext. clock pulse */
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#define IRQ_MAC_ADB_CL IRQ_VIA1_4
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#define IRQ_VIA1_5 (13)
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#define IRQ_MAC_TIMER_2 IRQ_VIA1_5
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#define IRQ_VIA1_6 (14)
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#define IRQ_MAC_TIMER_1 IRQ_VIA1_6
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#define IRQ_VIA1_7 (15)
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/* VIA2/RBV interrupts */
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#define IRQ_VIA2_0 (16)
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#define IRQ_MAC_SCSIDRQ IRQ_VIA2_0
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#define IRQ_VIA2_1 (17)
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#define IRQ_MAC_NUBUS IRQ_VIA2_1
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#define IRQ_VIA2_2 (18)
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#define IRQ_VIA2_3 (19)
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#define IRQ_MAC_SCSI IRQ_VIA2_3
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#define IRQ_VIA2_4 (20)
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#define IRQ_VIA2_5 (21)
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#define IRQ_VIA2_6 (22)
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#define IRQ_VIA2_7 (23)
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/* Level 3 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC3_0 (24)
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#define IRQ_MAC_MACE IRQ_PSC3_0
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#define IRQ_PSC3_1 (25)
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#define IRQ_PSC3_2 (26)
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#define IRQ_PSC3_3 (27)
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/* Level 4 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC4_0 (32)
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#define IRQ_PSC4_1 (33)
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#define IRQ_MAC_SCC_A IRQ_PSC4_1
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#define IRQ_PSC4_2 (34)
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#define IRQ_MAC_SCC_B IRQ_PSC4_2
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#define IRQ_PSC4_3 (35)
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#define IRQ_MAC_MACE_DMA IRQ_PSC4_3
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/* OSS Level 4 interrupts */
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#define IRQ_MAC_SCC (33)
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/* Level 5 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC5_0 (40)
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#define IRQ_PSC5_1 (41)
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#define IRQ_PSC5_2 (42)
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#define IRQ_PSC5_3 (43)
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/* Level 6 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC6_0 (48)
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#define IRQ_PSC6_1 (49)
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#define IRQ_PSC6_2 (50)
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#define IRQ_PSC6_3 (51)
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/* Nubus interrupts (cascaded to VIA2) */
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#define IRQ_NUBUS_9 (56)
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#define IRQ_NUBUS_A (57)
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#define IRQ_NUBUS_B (58)
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#define IRQ_NUBUS_C (59)
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#define IRQ_NUBUS_D (60)
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#define IRQ_NUBUS_E (61)
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#define IRQ_NUBUS_F (62)
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/* Baboon interrupts (cascaded to nubus slot $C) */
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#define IRQ_BABOON_0 (64)
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#define IRQ_BABOON_1 (65)
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#define IRQ_BABOON_2 (66)
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#define IRQ_BABOON_3 (67)
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#define SLOT2IRQ(x) (x + 47)
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#define IRQ2SLOT(x) (x - 47)
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#define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */
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#define INT_TICKS 246 /* to make sched_time = 99.902... HZ */
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#endif /* asm/macints.h */
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