--- /dev/null
+/*
+ * include/asm-mips/dec/kn05.h
+ *
+ * DECstation/DECsystem 5000/260 (4max+ or KN05), 5000/150 (4min
+ * or KN04-BA), Personal DECstation/DECsystem 5000/50 (4maxine or
+ * KN04-CA) and DECsystem 5900/260 (KN05) R4k CPU card MB ASIC
+ * definitions.
+ *
+ * Copyright (C) 2002, 2003, 2005, 2008 Maciej W. Rozycki
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * WARNING! All this information is pure guesswork based on the
+ * ROM. It is provided here in hope it will give someone some
+ * food for thought. No documentation for the KN05 nor the KN04
+ * module has been located so far.
+ */
+#ifndef __ASM_MIPS_DEC_KN05_H
+#define __ASM_MIPS_DEC_KN05_H
+
+#include <asm/dec/ioasic_addrs.h>
+
+/*
+ * The oncard MB (Memory Buffer) ASIC provides an additional address
+ * decoder. Certain address ranges within the "high" 16 slots are
+ * passed to the I/O ASIC's decoder like with the KN03 or KN02-BA/CA.
+ * Others are handled locally. "Low" slots are always passed.
+ */
+#define KN4K_SLOT_BASE 0x1fc00000
+
+#define KN4K_MB_ROM (0*IOASIC_SLOT_SIZE) /* KN05/KN04 card ROM */
+#define KN4K_IOCTL (1*IOASIC_SLOT_SIZE) /* I/O ASIC */
+#define KN4K_ESAR (2*IOASIC_SLOT_SIZE) /* LANCE MAC address chip */
+#define KN4K_LANCE (3*IOASIC_SLOT_SIZE) /* LANCE Ethernet */
+#define KN4K_MB_INT (4*IOASIC_SLOT_SIZE) /* MB interrupt register */
+#define KN4K_MB_EA (5*IOASIC_SLOT_SIZE) /* MB error address? */
+#define KN4K_MB_EC (6*IOASIC_SLOT_SIZE) /* MB error ??? */
+#define KN4K_MB_CSR (7*IOASIC_SLOT_SIZE) /* MB control & status */
+#define KN4K_RES_08 (8*IOASIC_SLOT_SIZE) /* unused? */
+#define KN4K_RES_09 (9*IOASIC_SLOT_SIZE) /* unused? */
+#define KN4K_RES_10 (10*IOASIC_SLOT_SIZE) /* unused? */
+#define KN4K_RES_11 (11*IOASIC_SLOT_SIZE) /* unused? */
+#define KN4K_SCSI (12*IOASIC_SLOT_SIZE) /* ASC SCSI */
+#define KN4K_RES_13 (13*IOASIC_SLOT_SIZE) /* unused? */
+#define KN4K_RES_14 (14*IOASIC_SLOT_SIZE) /* unused? */
+#define KN4K_RES_15 (15*IOASIC_SLOT_SIZE) /* unused? */
+
+/*
+ * MB ASIC interrupt bits.
+ */
+#define KN4K_MB_INR_MB 4 /* ??? */
+#define KN4K_MB_INR_MT 3 /* memory, I/O bus read/write errors */
+#define KN4K_MB_INR_RES_2 2 /* unused */
+#define KN4K_MB_INR_RTC 1 /* RTC */
+#define KN4K_MB_INR_TC 0 /* I/O ASIC cascade */
+
+/*
+ * Bits for the MB interrupt register.
+ * The register appears read-only.
+ */
+#define KN4K_MB_INT_IRQ (0x1f<<0) /* CPU Int[4:0] status. */
+#define KN4K_MB_INT_IRQ_N(n) (1<<(n)) /* Individual status bits. */
+
+/*
+ * Bits for the MB control & status register.
+ * Set to 0x00bf8001 for KN05 and to 0x003f8000 for KN04 by the firmware.
+ */
+#define KN4K_MB_CSR_PF (1<<0) /* PreFetching enable? */
+#define KN4K_MB_CSR_F (1<<1) /* ??? */
+#define KN4K_MB_CSR_ECC (0xff<<2) /* ??? */
+#define KN4K_MB_CSR_OD (1<<10) /* ??? */
+#define KN4K_MB_CSR_CP (1<<11) /* ??? */
+#define KN4K_MB_CSR_UNC (1<<12) /* ??? */
+#define KN4K_MB_CSR_IM (1<<13) /* ??? */
+#define KN4K_MB_CSR_NC (1<<14) /* ??? */
+#define KN4K_MB_CSR_EE (1<<15) /* (bus) Exception Enable? */
+#define KN4K_MB_CSR_MSK (0x1f<<16) /* CPU Int[4:0] mask */
+#define KN4K_MB_CSR_MSK_N(n) (1<<((n)+16)) /* Individual mask bits. */
+#define KN4K_MB_CSR_FW (1<<21) /* ??? */
+#define KN4K_MB_CSR_W (1<<31) /* ??? */
+
+#endif /* __ASM_MIPS_DEC_KN05_H */
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