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      1 /* $NetBSD: secreg.h,v 1.1 2006/10/01 12:39:35 bjh21 Exp $ */
      2 
      3 /*
      4  * Ben Harris 2006
      5  *
      6  * This file is in the public domain.
      7  */
      8 
      9 /*
     10  * Register definitions for Acorn SCSI expansion cards (AKA30, AKA31, AKA32)
     11  */
     12 
     13 /*
     14  * Offsets are in bus_space units (words)
     15  */
     16 
     17 /* Podule "fast" space */
     18 #define SEC_ROM		0x000
     19 #define SEC_ISR		0x800 /* Interrupt status (read-only) */
     20 #define SEC_ISR_SBIC	0x08  /* Interrupt from WD33C93A SBIC */
     21 #define SEC_ISR_DMAC	0x02  /* TC uPD71071 DMAC */
     22 #define SEC_ISR_IRQ	0x01  /* OR of the above */
     23 #define SEC_CLRINT	0x800 /* Clear TC interrupt (write-only) */
     24 #define SEC_MPR		0xc00 /* Memory page register */
     25 #define SEC_MPR_UR	0x80  /* User reset */
     26 #define SEC_MPR_IE	0x40  /* Interrupts enabled */
     27 #define SEC_MPR_PAGE	0x3f  /* EPROM/SRAM page address */
     28 
     29 /* Module space */
     30 #define SEC_SRAM	0x000
     31 #define SEC_SBIC	0x800
     32 #define SEC_DMAC	0xc00
     33 
     34 /* The address lines of the DMAC are permuted. */
     35 #define DMAC(addr) ((addr) >> 1 | ((addr) & 1) << 7)
     36 
     37 #define SEC_CLKFREQ	80	/* Clock speed in 100 kHz */
     38 #define SEC_NPAGES	16
     39 #define SEC_PAGESIZE	4096
     40 #define SEC_MEMSIZE	(SEC_PAGESIZE * SEC_NPAGES)
     41