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      1 /*	$NetBSD: frodoreg.h,v 1.6 2023/01/15 06:19:45 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Michael Smith.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * Where we find the 8250-like APCI ports, and how far apart they are.
     30  */
     31 #define	FRODO_APCIBASE		0x0
     32 #define	FRODO_APCISPACE		0x20
     33 #define	FRODO_APCI_OFFSET(x)	(FRODO_APCIBASE + ((x) * FRODO_APCISPACE))
     34 
     35 /*
     36  * Other items in the Frodo part
     37  */
     38 
     39 /* An mc146818-like calendar.  Only 425e has a battery and an oscillator. */
     40 #define	FRODO_CALENDAR		0x80
     41 
     42 #define	FRODO_TIMER		0xa0	/* 8254-like timer */
     43 #define	FRODO_T1_CTR		0xa0	/* counter 1 */
     44 #define	FRODO_T2_CTR		0xa4	/* counter 2 */
     45 #define	FRODO_T3_CTR		0xa8	/* counter 3 */
     46 #define	FRODO_T_CTRL		0xac	/* control register */
     47 #define	FRODO_T_PSCALE		0xb0	/* prescaler */
     48 #define	FRODO_T_PCOUNT		0xb4	/* precounter ? */
     49 #define	FRODO_T_OVCOUNT		0xb8	/* overflow counter (0, 1, 2) */
     50 
     51 #define	FRODO_PIO		0xc0	/* programmable i/o registers start
     52 					   here */
     53 #define	FRODO_IISR		0xc0	/* ISA Interrupt Status Register
     54 					   (also PIR) */
     55 #define	FRODO_IISR_SERVICE	(1<<0)	/* service switch "on" if 0 */
     56 #define	FRODO_IISR_ILOW		(1<<1)	/* IRQ 3,4,5 or 6 on ISA if 1 */
     57 #define	FRODO_IISR_IMID		(1<<2)	/* IRQ 7,9,10 or 11 on ISA if 1 */
     58 #define	FRODO_IISR_IHI		(1<<3)	/* IRQ 12,13,14 or 15 on ISA if 1 */
     59 		/* bits 4 and 5 are DN2500 SCSI interrupts */
     60 		/* bit 6 is unused */
     61 #define	FRODO_IISR_IOCHK	(1<<7)	/* ISA board asserted IOCHK if low */
     62 
     63 #define	FRODO_PIO_IPR		0xc4	/* input polarity register
     64 					   (ints 7->0) */
     65 
     66 #define	FRODO_PIO_IELR		0xc8	/* input edge/level register */
     67 
     68 /* This is probably not used on the 4xx */
     69 #define	FRODO_DIAGCTL		0xd0	/* Diagnostic Control Register */
     70 
     71 #define	FRODO_PIC_MU		0xe0	/* upper Interrupt Mask register */
     72 #define	FRODO_PIC_ML		0xe4	/* lower Interrupt Mask register */
     73 #define	FRODO_PIC_PU		0xe8	/* upper Interrupt Pending register */
     74 #define	FRODO_PIC_PL		0xec	/* lower Interrupt Pending register */
     75 #define	FRODO_PIC_IVR		0xf8	/* Interrupt Vector register */
     76 #define	FRODO_PIC_ACK		0xf8	/* Interrupt Acknowledge */
     77 
     78 /* Shorthand for register access. */
     79 #define	FRODO_READ(sc, reg)		((sc)->sc_regs[(reg)])
     80 #define	FRODO_WRITE(sc, reg, val)	(sc)->sc_regs[(reg)] = (val)
     81 
     82 /* manipulate interrupt registers */
     83 #define	FRODO_GETMASK(sc)						\
     84 	((FRODO_READ((sc), FRODO_PIC_MU) << 8) |			\
     85 	    FRODO_READ((sc), FRODO_PIC_ML))
     86 #define	FRODO_SETMASK(sc, val) do {					\
     87 	FRODO_WRITE((sc), FRODO_PIC_MU, ((val) >> 8) & 0xff);		\
     88 	FRODO_WRITE((sc), FRODO_PIC_ML, (val) & 0xff); } while (0)
     89 
     90 #define	FRODO_GETPEND(sc)						\
     91 	((FRODO_READ((sc), FRODO_PIC_PU) << 8) |			\
     92 	    FRODO_READ((sc), FRODO_PIC_PL))
     93 #define	FRODO_IPEND(sc)							\
     94 	(FRODO_READ((sc), FRODO_PIC_ACK) & 0x0f)
     95 
     96 /*
     97  * Interrupt lines.  Use FRODO_INTR_BIT() below to get a bit
     98  * suitable for one of the interrupt mask registers.  Yes, line
     99  * 0 is unused.
    100  */
    101 #define	FRODO_INTR_ILOW		1
    102 #define	FRODO_INTR_IMID		2
    103 #define	FRODO_INTR_IHI		3
    104 #define	FRODO_INTR_SCSIDMA	4	/* DN2500 only */
    105 #define	FRODO_INTR_SCSI		5	/* DN2500 only */
    106 #define	FRODO_INTR_HORIZ	6
    107 #define	FRODO_INTR_IOCHK	7
    108 #define	FRODO_INTR_CALENDAR	8
    109 #define	FRODO_INTR_TIMER0	9
    110 #define	FRODO_INTR_TIMER1	10
    111 #define	FRODO_INTR_TIMER2	11
    112 #define	FRODO_INTR_APCI0	12
    113 #define	FRODO_INTR_APCI1	13
    114 #define	FRODO_INTR_APCI2	14
    115 #define	FRODO_INTR_APCI3	15
    116 
    117 #define	FRODO_NINTR		16
    118 
    119 #define	FRODO_INTR_BIT(line)	(1 << (line))
    120