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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 <irq.h>
18 #include <asm/mipsregs.h>
19 
20 
21 /*
22  * The list of possible system devices which provide an
23  * interrupt.  Not all devices exist on a given system.
24  */
25 #define DEC_IRQ_CASCADE		0	/* cascade from CSR or I/O ASIC */
26 
27 /* Ordinary interrupts */
28 #define DEC_IRQ_AB_RECV		1	/* ACCESS.bus receive */
29 #define DEC_IRQ_AB_XMIT		2	/* ACCESS.bus transmit */
30 #define DEC_IRQ_DZ11		3	/* DZ11 (DC7085) serial */
31 #define DEC_IRQ_ASC		4	/* ASC (NCR53C94) SCSI */
32 #define DEC_IRQ_FLOPPY		5	/* 82077 FDC */
33 #define DEC_IRQ_FPU		6	/* R3k FPU */
34 #define DEC_IRQ_HALT		7	/* HALT button or from ACCESS.Bus */
35 #define DEC_IRQ_ISDN		8	/* Am79C30A ISDN */
36 #define DEC_IRQ_LANCE		9	/* LANCE (Am7990) Ethernet */
37 #define DEC_IRQ_BUS		10	/* memory, I/O bus read/write errors */
38 #define DEC_IRQ_PSU		11	/* power supply unit warning */
39 #define DEC_IRQ_RTC		12	/* DS1287 RTC */
40 #define DEC_IRQ_SCC0		13	/* SCC (Z85C30) serial #0 */
41 #define DEC_IRQ_SCC1		14	/* SCC (Z85C30) serial #1 */
42 #define DEC_IRQ_SII		15	/* SII (DC7061) SCSI */
43 #define DEC_IRQ_TC0		16	/* TURBOchannel slot #0 */
44 #define DEC_IRQ_TC1		17	/* TURBOchannel slot #1 */
45 #define DEC_IRQ_TC2		18	/* TURBOchannel slot #2 */
46 #define DEC_IRQ_TIMER		19	/* ARC periodic timer */
47 #define DEC_IRQ_VIDEO		20	/* framebuffer */
48 
49 /* I/O ASIC DMA interrupts */
50 #define DEC_IRQ_ASC_MERR	21	/* ASC memory read error */
51 #define DEC_IRQ_ASC_ERR		22	/* ASC page overrun */
52 #define DEC_IRQ_ASC_DMA		23	/* ASC buffer pointer loaded */
53 #define DEC_IRQ_FLOPPY_ERR	24	/* FDC error */
54 #define DEC_IRQ_ISDN_ERR	25	/* ISDN memory read/overrun error */
55 #define DEC_IRQ_ISDN_RXDMA	26	/* ISDN recv buffer pointer loaded */
56 #define DEC_IRQ_ISDN_TXDMA	27	/* ISDN xmit buffer pointer loaded */
57 #define DEC_IRQ_LANCE_MERR	28	/* LANCE memory read error */
58 #define DEC_IRQ_SCC0A_RXERR	29	/* SCC0A (printer) receive overrun */
59 #define DEC_IRQ_SCC0A_RXDMA	30	/* SCC0A receive half page */
60 #define DEC_IRQ_SCC0A_TXERR	31	/* SCC0A xmit memory read/overrun */
61 #define DEC_IRQ_SCC0A_TXDMA	32	/* SCC0A transmit page end */
62 #define DEC_IRQ_AB_RXERR	33	/* ACCESS.bus receive overrun */
63 #define DEC_IRQ_AB_RXDMA	34	/* ACCESS.bus receive half page */
64 #define DEC_IRQ_AB_TXERR	35	/* ACCESS.bus xmit memory read/ovrn */
65 #define DEC_IRQ_AB_TXDMA	36	/* ACCESS.bus transmit page end */
66 #define DEC_IRQ_SCC1A_RXERR	37	/* SCC1A (modem) receive overrun */
67 #define DEC_IRQ_SCC1A_RXDMA	38	/* SCC1A receive half page */
68 #define DEC_IRQ_SCC1A_TXERR	39	/* SCC1A xmit memory read/overrun */
69 #define DEC_IRQ_SCC1A_TXDMA	40	/* SCC1A transmit page end */
70 
71 /* TC5 & TC6 are virtual slots for KN02's onboard devices */
72 #define DEC_IRQ_TC5		DEC_IRQ_ASC	/* virtual PMAZ-AA */
73 #define DEC_IRQ_TC6		DEC_IRQ_LANCE	/* virtual PMAD-AA */
74 
75 #define DEC_NR_INTS		41
76 
77 
78 /* Largest of cpu mask_nr tables. */
79 #define DEC_MAX_CPU_INTS	6
80 /* Largest of asic mask_nr tables. */
81 #define DEC_MAX_ASIC_INTS	9
82 
83 
84 /*
85  * CPU interrupt bits common to all systems.
86  */
87 #define DEC_CPU_INR_FPU		7	/* R3k FPU */
88 #define DEC_CPU_INR_SW1		1	/* software #1 */
89 #define DEC_CPU_INR_SW0		0	/* software #0 */
90 
91 #define DEC_CPU_IRQ_BASE	MIPS_CPU_IRQ_BASE	/* first IRQ assigned to CPU */
92 
93 #define DEC_CPU_IRQ_NR(n)	((n) + DEC_CPU_IRQ_BASE)
94 #define DEC_CPU_IRQ_MASK(n)	(1 << ((n) + CAUSEB_IP))
95 #define DEC_CPU_IRQ_ALL		(0xff << CAUSEB_IP)
96 
97 
98 #ifndef __ASSEMBLY__
99 
100 /*
101  * Interrupt table structures to hide differences between systems.
102  */
103 typedef union { int i; void *p; } int_ptr;
104 extern int dec_interrupt[DEC_NR_INTS];
105 extern int_ptr cpu_mask_nr_tbl[DEC_MAX_CPU_INTS][2];
106 extern int_ptr asic_mask_nr_tbl[DEC_MAX_ASIC_INTS][2];
107 extern int cpu_fpu_mask;
108 
109 
110 /*
111  * Common interrupt routine prototypes for all DECStations
112  */
113 extern void kn02_io_int(void);
114 extern void kn02xa_io_int(void);
115 extern void kn03_io_int(void);
116 extern void asic_dma_int(void);
117 extern void asic_all_int(void);
118 extern void kn02_all_int(void);
119 extern void cpu_all_int(void);
120 
121 extern void dec_intr_unimplemented(void);
122 extern void asic_intr_unimplemented(void);
123 
124 #endif /* __ASSEMBLY__ */
125 
126 #endif
127