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1/*
2 * Miscellaneous definitions used to initialise the interrupt vector table
3 * with the machine-specific interrupt routines.
4 *
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * Copyright (C) 1997 by Paul M. Antoine.
10 * reworked 1998 by Harald Koerfgen.
11 * Copyright (C) 2001, 2002, 2003 Maciej W. Rozycki
12 */
13
14#ifndef __ASM_DEC_INTERRUPTS_H
15#define __ASM_DEC_INTERRUPTS_H
16
17#include <asm/mipsregs.h>
18
19
20/*
21 * The list of possible system devices which provide an
22 * interrupt. Not all devices exist on a given system.
23 */
24#define DEC_IRQ_CASCADE 0 /* cascade from CSR or I/O ASIC */
25
26/* Ordinary interrupts */
27#define DEC_IRQ_AB_RECV 1 /* ACCESS.bus receive */
28#define DEC_IRQ_AB_XMIT 2 /* ACCESS.bus transmit */
29#define DEC_IRQ_DZ11 3 /* DZ11 (DC7085) serial */
30#define DEC_IRQ_ASC 4 /* ASC (NCR53C94) SCSI */
31#define DEC_IRQ_FLOPPY 5 /* 82077 FDC */
32#define DEC_IRQ_FPU 6 /* R3k FPU */
33#define DEC_IRQ_HALT 7 /* HALT button or from ACCESS.Bus */
34#define DEC_IRQ_ISDN 8 /* Am79C30A ISDN */
35#define DEC_IRQ_LANCE 9 /* LANCE (Am7990) Ethernet */
36#define DEC_IRQ_BUS 10 /* memory, I/O bus read/write errors */
37#define DEC_IRQ_PSU 11 /* power supply unit warning */
38#define DEC_IRQ_RTC 12 /* DS1287 RTC */
39#define DEC_IRQ_SCC0 13 /* SCC (Z85C30) serial #0 */
40#define DEC_IRQ_SCC1 14 /* SCC (Z85C30) serial #1 */
41#define DEC_IRQ_SII 15 /* SII (DC7061) SCSI */
42#define DEC_IRQ_TC0 16 /* TURBOchannel slot #0 */
43#define DEC_IRQ_TC1 17 /* TURBOchannel slot #1 */
44#define DEC_IRQ_TC2 18 /* TURBOchannel slot #2 */
45#define DEC_IRQ_TIMER 19 /* ARC periodic timer */
46#define DEC_IRQ_VIDEO 20 /* framebuffer */
47
48/* I/O ASIC DMA interrupts */
49#define DEC_IRQ_ASC_MERR 21 /* ASC memory read error */
50#define DEC_IRQ_ASC_ERR 22 /* ASC page overrun */
51#define DEC_IRQ_ASC_DMA 23 /* ASC buffer pointer loaded */
52#define DEC_IRQ_FLOPPY_ERR 24 /* FDC error */
53#define DEC_IRQ_ISDN_ERR 25 /* ISDN memory read/overrun error */
54#define DEC_IRQ_ISDN_RXDMA 26 /* ISDN recv buffer pointer loaded */
55#define DEC_IRQ_ISDN_TXDMA 27 /* ISDN xmit buffer pointer loaded */
56#define DEC_IRQ_LANCE_MERR 28 /* LANCE memory read error */
57#define DEC_IRQ_SCC0A_RXERR 29 /* SCC0A (printer) receive overrun */
58#define DEC_IRQ_SCC0A_RXDMA 30 /* SCC0A receive half page */
59#define DEC_IRQ_SCC0A_TXERR 31 /* SCC0A xmit memory read/overrun */
60#define DEC_IRQ_SCC0A_TXDMA 32 /* SCC0A transmit page end */
61#define DEC_IRQ_AB_RXERR 33 /* ACCESS.bus receive overrun */
62#define DEC_IRQ_AB_RXDMA 34 /* ACCESS.bus receive half page */
63#define DEC_IRQ_AB_TXERR 35 /* ACCESS.bus xmit memory read/ovrn */
64#define DEC_IRQ_AB_TXDMA 36 /* ACCESS.bus transmit page end */
65#define DEC_IRQ_SCC1A_RXERR 37 /* SCC1A (modem) receive overrun */
66#define DEC_IRQ_SCC1A_RXDMA 38 /* SCC1A receive half page */
67#define DEC_IRQ_SCC1A_TXERR 39 /* SCC1A xmit memory read/overrun */
68#define DEC_IRQ_SCC1A_TXDMA 40 /* SCC1A transmit page end */
69
70/* TC5 & TC6 are virtual slots for KN02's onboard devices */
71#define DEC_IRQ_TC5 DEC_IRQ_ASC /* virtual PMAZ-AA */
72#define DEC_IRQ_TC6 DEC_IRQ_LANCE /* virtual PMAD-AA */
73
74#define DEC_NR_INTS 41
75
76
77/* Largest of cpu mask_nr tables. */
78#define DEC_MAX_CPU_INTS 6
79/* Largest of asic mask_nr tables. */
80#define DEC_MAX_ASIC_INTS 9
81
82
83/*
84 * CPU interrupt bits common to all systems.
85 */
86#define DEC_CPU_INR_FPU 7 /* R3k FPU */
87#define DEC_CPU_INR_SW1 1 /* software #1 */
88#define DEC_CPU_INR_SW0 0 /* software #0 */
89
90#define DEC_CPU_IRQ_BASE 0 /* first IRQ assigned to CPU */
91
92#define DEC_CPU_IRQ_NR(n) ((n) + DEC_CPU_IRQ_BASE)
93#define DEC_CPU_IRQ_MASK(n) (1 << ((n) + CAUSEB_IP))
94#define DEC_CPU_IRQ_ALL (0xff << CAUSEB_IP)
95
96
97#ifndef __ASSEMBLY__
98
99/*
100 * Interrupt table structures to hide differences between systems.
101 */
102typedef union { int i; void *p; } int_ptr;
103extern int dec_interrupt[DEC_NR_INTS];
104extern int_ptr cpu_mask_nr_tbl[DEC_MAX_CPU_INTS][2];
105extern int_ptr asic_mask_nr_tbl[DEC_MAX_ASIC_INTS][2];
106extern int cpu_fpu_mask;
107
108
109/*
110 * Common interrupt routine prototypes for all DECStations
111 */
112extern void kn02_io_int(void);
113extern void kn02xa_io_int(void);
114extern void kn03_io_int(void);
115extern void asic_dma_int(void);
116extern void asic_all_int(void);
117extern void kn02_all_int(void);
118extern void cpu_all_int(void);
119
120extern void dec_intr_unimplemented(void);
121extern void asic_intr_unimplemented(void);
122
123#endif /* __ASSEMBLY__ */
124
125#endif