41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
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/* $NetBSD: secreg.h,v 1.1 2006/10/01 12:39:35 bjh21 Exp $ */
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/*
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* Ben Harris 2006
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*
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* This file is in the public domain.
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*/
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/*
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* Register definitions for Acorn SCSI expansion cards (AKA30, AKA31, AKA32)
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*/
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/*
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* Offsets are in bus_space units (words)
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*/
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/* Podule "fast" space */
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#define SEC_ROM 0x000
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#define SEC_ISR 0x800 /* Interrupt status (read-only) */
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#define SEC_ISR_SBIC 0x08 /* Interrupt from WD33C93A SBIC */
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#define SEC_ISR_DMAC 0x02 /* TC uPD71071 DMAC */
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#define SEC_ISR_IRQ 0x01 /* OR of the above */
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#define SEC_CLRINT 0x800 /* Clear TC interrupt (write-only) */
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#define SEC_MPR 0xc00 /* Memory page register */
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#define SEC_MPR_UR 0x80 /* User reset */
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#define SEC_MPR_IE 0x40 /* Interrupts enabled */
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#define SEC_MPR_PAGE 0x3f /* EPROM/SRAM page address */
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/* Module space */
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#define SEC_SRAM 0x000
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#define SEC_SBIC 0x800
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#define SEC_DMAC 0xc00
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/* The address lines of the DMAC are permuted. */
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#define DMAC(addr) ((addr) >> 1 | ((addr) & 1) << 7)
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#define SEC_CLKFREQ 80 /* Clock speed in 100 kHz */
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#define SEC_NPAGES 16
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#define SEC_PAGESIZE 4096
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#define SEC_MEMSIZE (SEC_PAGESIZE * SEC_NPAGES)
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