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diff --git a/include/asm-mips/ddb5xxx/ddb5476.h b/include/asm-mips/ddb5xxx/ddb5476.h
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+/*
+ * header file specific for ddb5476
+ *
+ * Copyright (C) 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * 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.
+ *
+ */
+
+/*
+ * Memory map (physical address)
+ *
+ * Note most of the following address must be properly aligned by the
+ * corresponding size. For example, if PCI_IO_SIZE is 16MB, then
+ * PCI_IO_BASE must be aligned along 16MB boundary.
+ */
+#define DDB_SDRAM_BASE 0x00000000
+#define DDB_SDRAM_SIZE 0x04000000 /* 64MB */
+
+#define DDB_DCS3_BASE 0x04000000 /* flash 1 */
+#define DDB_DCS3_SIZE 0x01000000 /* 16MB */
+
+#define DDB_DCS2_BASE 0x05000000 /* flash 2 */
+#define DDB_DCS2_SIZE 0x01000000 /* 16MB */
+
+#define DDB_PCI_IO_BASE 0x06000000
+#define DDB_PCI_IO_SIZE 0x02000000 /* 32 MB */
+
+#define DDB_PCI_MEM_BASE 0x08000000
+#define DDB_PCI_MEM_SIZE 0x08000000 /* 128 MB */
+
+#define DDB_DCS5_BASE 0x13000000 /* DDB status regs */
+#define DDB_DCS5_SIZE 0x00200000 /* 2MB, 8-bit */
+
+#define DDB_DCS4_BASE 0x14000000 /* DDB control regs */
+#define DDB_DCS4_SIZE 0x00200000 /* 2MB, 8-bit */
+
+#define DDB_INTCS_BASE 0x1fa00000 /* VRC5476 control regs */
+#define DDB_INTCS_SIZE 0x00200000 /* 2MB */
+
+#define DDB_BOOTCS_BASE 0x1fc00000 /* Boot ROM / EPROM /Flash */
+#define DDB_BOOTCS_SIZE 0x00200000 /* 2 MB - doc says 4MB */
+
+
+/* aliases */
+#define DDB_PCI_CONFIG_BASE DDB_PCI_MEM_BASE
+#define DDB_PCI_CONFIG_SIZE DDB_PCI_MEM_SIZE
+
+/* PCI intr ack share PCIW0 with PCI IO */
+#define DDB_PCI_IACK_BASE DDB_PCI_IO_BASE
+
+/*
+ * Interrupt mapping
+ *
+ * We have three interrupt controllers:
+ *
+ * . CPU itself - 8 sources
+ * . i8259 - 16 sources
+ * . vrc5476 - 16 sources
+ *
+ * They connected as follows:
+ * all vrc5476 interrupts are routed to cpu IP2 (by software setting)
+ * all i2869 are routed to INTC in vrc5476 (by hardware connection)
+ *
+ * All VRC5476 PCI interrupts are level-triggered (no ack needed).
+ * All PCI irq but INTC are active low.
+ */
+
+/*
+ * irq number block assignment
+ */
+
+#define NUM_CPU_IRQ 8
+#define NUM_I8259_IRQ 16
+#define NUM_VRC5476_IRQ 16
+
+#define DDB_IRQ_BASE 0
+
+#define I8259_IRQ_BASE DDB_IRQ_BASE
+#define VRC5476_IRQ_BASE (I8259_IRQ_BASE + NUM_I8259_IRQ)
+#define CPU_IRQ_BASE (VRC5476_IRQ_BASE + NUM_VRC5476_IRQ)
+
+/*
+ * vrc5476 irq defs, see page 52-64 of Vrc5074 system controller manual
+ */
+
+#define VRC5476_IRQ_CPCE 0 /* cpu parity error */
+#define VRC5476_IRQ_CNTD 1 /* cpu no target */
+#define VRC5476_IRQ_MCE 2 /* memory check error */
+#define VRC5476_IRQ_DMA 3 /* DMA */
+#define VRC5476_IRQ_UART 4 /* vrc5476 builtin UART, not used */
+#define VRC5476_IRQ_WDOG 5 /* watchdog timer */
+#define VRC5476_IRQ_GPT 6 /* general purpose timer */
+#define VRC5476_IRQ_LBRT 7 /* local bus read timeout */
+#define VRC5476_IRQ_INTA 8 /* PCI INT #A */
+#define VRC5476_IRQ_INTB 9 /* PCI INT #B */
+#define VRC5476_IRQ_INTC 10 /* PCI INT #C */
+#define VRC5476_IRQ_INTD 11 /* PCI INT #D */
+#define VRC5476_IRQ_INTE 12 /* PCI INT #E */
+#define VRC5476_IRQ_RESERVED_13 13 /* reserved */
+#define VRC5476_IRQ_PCIS 14 /* PCI SERR # */
+#define VRC5476_IRQ_PCI 15 /* PCI internal error */
+
+/*
+ * i2859 irq assignment
+ */
+#define I8259_IRQ_RESERVED_0 0
+#define I8259_IRQ_KEYBOARD 1 /* M1543 default */
+#define I8259_IRQ_CASCADE 2
+#define I8259_IRQ_UART_B 3 /* M1543 default, may conflict with RTC according to schematic diagram */
+#define I8259_IRQ_UART_A 4 /* M1543 default */
+#define I8259_IRQ_PARALLEL 5 /* M1543 default */
+#define I8259_IRQ_RESERVED_6 6
+#define I8259_IRQ_RESERVED_7 7
+#define I8259_IRQ_RTC 8 /* who set this? */
+#define I8259_IRQ_USB 9 /* ddb_setup */
+#define I8259_IRQ_PMU 10 /* ddb_setup */
+#define I8259_IRQ_RESERVED_11 11
+#define I8259_IRQ_RESERVED_12 12 /* m1543_irq_setup */
+#define I8259_IRQ_RESERVED_13 13
+#define I8259_IRQ_HDC1 14 /* default and ddb_setup */
+#define I8259_IRQ_HDC2 15 /* default */
+
+
+/*
+ * misc
+ */
+#define VRC5476_I8259_CASCADE VRC5476_IRQ_INTC
+#define CPU_VRC5476_CASCADE 2
+
+#define is_i8259_irq(irq) ((irq) < NUM_I8259_IRQ)
+#define nile4_to_irq(n) ((n)+NUM_I8259_IRQ)
+#define irq_to_nile4(n) ((n)-NUM_I8259_IRQ)
+
+/*
+ * low-level irq functions
+ */
+#ifndef __ASSEMBLY__
+extern void nile4_map_irq(int nile4_irq, int cpu_irq);
+extern void nile4_map_irq_all(int cpu_irq);
+extern void nile4_enable_irq(int nile4_irq);
+extern void nile4_disable_irq(int nile4_irq);
+extern void nile4_disable_irq_all(void);
+extern u16 nile4_get_irq_stat(int cpu_irq);
+extern void nile4_enable_irq_output(int cpu_irq);
+extern void nile4_disable_irq_output(int cpu_irq);
+extern void nile4_set_pci_irq_polarity(int pci_irq, int high);
+extern void nile4_set_pci_irq_level_or_edge(int pci_irq, int level);
+extern void nile4_clear_irq(int nile4_irq);
+extern void nile4_clear_irq_mask(u32 mask);
+extern u8 nile4_i8259_iack(void);
+extern void nile4_dump_irq_status(void); /* Debug */
+#endif /* !__ASSEMBLY__ */
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