xref: /linux/arch/mips/include/asm/dec/ioasic_ints.h (revision e5451c8f8330e03ad3cfa16048b4daf961af434f)
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Definitions for the interrupt related bits in the I/O ASIC
7  * interrupt status register (and the interrupt mask register, of course)
8  *
9  * Created with Information from:
10  *
11  * "DEC 3000 300/400/500/600/700/800/900 AXP Models System Programmer's Manual"
12  *
13  * and the Mach Sources
14  *
15  * Copyright (C) 199x  the Anonymous
16  * Copyright (C) 2002  Maciej W. Rozycki
17  */
18 
19 #ifndef __ASM_DEC_IOASIC_INTS_H
20 #define __ASM_DEC_IOASIC_INTS_H
21 
22 /*
23  * The upper 16 bits are a part of the I/O ASIC's internal DMA engine
24  * and thus are common to all I/O ASIC machines.  The exception is
25  * the Maxine, which makes use of the FLOPPY and ISDN bits (otherwise
26  * unused) and has a different SCC wiring.
27  */
28 					/* all systems */
29 #define IO_INR_SCC0A_TXDMA	31	/* SCC0A transmit page end */
30 #define IO_INR_SCC0A_TXERR	30	/* SCC0A transmit memory read error */
31 #define IO_INR_SCC0A_RXDMA	29	/* SCC0A receive half page */
32 #define IO_INR_SCC0A_RXERR	28	/* SCC0A receive overrun */
33 #define IO_INR_ASC_DMA		19	/* ASC buffer pointer loaded */
34 #define IO_INR_ASC_ERR		18	/* ASC page overrun */
35 #define IO_INR_ASC_MERR		17	/* ASC memory read error */
36 #define IO_INR_LANCE_MERR	16	/* LANCE memory read error */
37 
38 					/* except Maxine */
39 #define IO_INR_SCC1A_TXDMA	27	/* SCC1A transmit page end */
40 #define IO_INR_SCC1A_TXERR	26	/* SCC1A transmit memory read error */
41 #define IO_INR_SCC1A_RXDMA	25	/* SCC1A receive half page */
42 #define IO_INR_SCC1A_RXERR	24	/* SCC1A receive overrun */
43 #define IO_INR_RES_23		23	/* unused */
44 #define IO_INR_RES_22		22	/* unused */
45 #define IO_INR_RES_21		21	/* unused */
46 #define IO_INR_RES_20		20	/* unused */
47 
48 					/* Maxine */
49 #define IO_INR_AB_TXDMA		27	/* ACCESS.bus transmit page end */
50 #define IO_INR_AB_TXERR		26	/* ACCESS.bus xmit memory read error */
51 #define IO_INR_AB_RXDMA		25	/* ACCESS.bus receive half page */
52 #define IO_INR_AB_RXERR		24	/* ACCESS.bus receive overrun */
53 #define IO_INR_FLOPPY_ERR	23	/* FDC error */
54 #define IO_INR_ISDN_TXDMA	22	/* ISDN xmit buffer pointer loaded */
55 #define IO_INR_ISDN_RXDMA	21	/* ISDN recv buffer pointer loaded */
56 #define IO_INR_ISDN_ERR		20	/* ISDN memory read/overrun error */
57 
58 #define IO_INR_DMA		16	/* first DMA IRQ */
59 
60 /*
61  * The lower 16 bits are system-specific and thus defined in
62  * system-specific headers.
63  */
64 
65 
66 #define IO_IRQ_BASE		8	/* first IRQ assigned to I/O ASIC */
67 #define IO_IRQ_LINES		32	/* number of I/O ASIC interrupts */
68 
69 #define IO_IRQ_NR(n)		((n) + IO_IRQ_BASE)
70 #define IO_IRQ_MASK(n)		(1 << (n))
71 #define IO_IRQ_ALL		0x0000ffff
72 #define IO_IRQ_DMA		0xffff0000
73 
74 #endif /* __ASM_DEC_IOASIC_INTS_H */
75