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Diffstat (limited to 'arch/m68k/include/asm/macints.h')
| -rw-r--r-- | arch/m68k/include/asm/macints.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/macints.h b/arch/m68k/include/asm/macints.h new file mode 100644 index 000000000..cddb2d3ea --- /dev/null +++ b/arch/m68k/include/asm/macints.h @@ -0,0 +1,127 @@ +/* +** 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> + +/* + * 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 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 (PSC, AV Macs only) interrupts */ +#define IRQ_PSC4_0 (32) +#define IRQ_PSC4_1 (33) +#define IRQ_MAC_SCC_A IRQ_PSC4_1 +#define IRQ_PSC4_2 (34) +#define IRQ_MAC_SCC_B IRQ_PSC4_2 +#define IRQ_PSC4_3 (35) +#define IRQ_MAC_MACE_DMA IRQ_PSC4_3 + +/* OSS Level 4 interrupts */ +#define IRQ_MAC_SCC (33) + +/* 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 */ |