Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

7 files changed, 1029 insertions, 0 deletions

diff --git a/include/asm-mips/sgi/gio.h b/include/asm-mips/sgi/gio.h
new file mode 100644
index 00000000000..a38d66f9987
--- /dev/null
+++ b/include/asm-mips/sgi/gio.h
@@ -0,0 +1,86 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * gio.h: Definitions for SGI GIO bus
+ *
+ * Copyright (C) 2002 Ladislav Michl
+ */
+
+#ifndef _SGI_GIO_H
+#define _SGI_GIO_H
+
+/*
+ * GIO bus addresses
+ *
+ * The Indigo and Indy have two GIO bus connectors. Indigo2 (all models) have
+ * three physical connectors, but only two slots, GFX and EXP0.
+ * 
+ * There is 10MB of GIO address space for GIO64 slot devices
+ * slot#   slot type address range            size
+ * -----   --------- ----------------------- -----
+ *   0     GFX       0x1f000000 - 0x1f3fffff   4MB
+ *   1     EXP0      0x1f400000 - 0x1f5fffff   2MB
+ *   2     EXP1      0x1f600000 - 0x1f9fffff   4MB
+ *
+ * There are un-slotted devices, HPC, I/O and misc devices, which are grouped
+ * into the HPC address space.
+ *   -     MISC      0x1fb00000 - 0x1fbfffff   1MB
+ *
+ * Following space is reserved and unused
+ *   -     RESERVED  0x18000000 - 0x1effffff 112MB
+ *
+ * GIO bus IDs
+ *
+ * Each GIO bus device identifies itself to the system by answering a
+ * read with an "ID" value. IDs are either 8 or 32 bits long. IDs less
+ * than 128 are 8 bits long, with the most significant 24 bits read from
+ * the slot undefined.
+ *
+ * 32-bit IDs are divided into
+ *	bits 0:6        the product ID; ranges from 0x00 to 0x7F.
+ *	bit 7		0=GIO Product ID is 8 bits wide
+ *			1=GIO Product ID is 32 bits wide.
+ *	bits 8:15       manufacturer version for the product.
+ *	bit 16		0=GIO32 and GIO32-bis, 1=GIO64.
+ *	bit 17		0=no ROM present
+ *			1=ROM present on this board AND next three words
+ *			space define the ROM.
+ *	bits 18:31	up to manufacturer.
+ *
+ * IDs above 0x50/0xd0 are of 3rd party boards.
+ *
+ * 8-bit IDs
+ *	0x01		XPI low cost FDDI
+ *	0x02		GTR TokenRing
+ *	0x04		Synchronous ISDN
+ *	0x05		ATM board [*]
+ *	0x06		Canon Interface
+ *	0x07		16 bit SCSI Card [*]
+ *	0x08		JPEG (Double Wide)
+ *	0x09		JPEG (Single Wide)
+ *	0x0a		XPI mez. FDDI device 0
+ *	0x0b		XPI mez. FDDI device 1
+ *	0x0c		SMPTE 259M Video [*]
+ *	0x0d		Babblefish Compression [*]
+ *	0x0e		E-Plex 8-port Ethernet
+ *	0x30		Lyon Lamb IVAS
+ *	0xb8		GIO 100BaseTX Fast Ethernet (gfe)
+ *
+ * [*] Device provide 32-bit ID.
+ *
+ */
+
+#define GIO_ID(x)		(x & 0x7f)
+#define GIO_32BIT_ID		0x80
+#define GIO_REV(x)		((x >> 8) & 0xff)
+#define GIO_64BIT_IFACE		0x10000
+#define GIO_ROM_PRESENT		0x20000
+#define GIO_VENDOR_CODE(x)	((x >> 18) & 0x3fff)
+
+#define GIO_SLOT_GFX_BASE	0x1f000000
+#define GIO_SLOT_EXP0_BASE	0x1f400000
+#define GIO_SLOT_EXP1_BASE	0x1f600000
+
+#endif /* _SGI_GIO_H */
diff --git a/include/asm-mips/sgi/hpc3.h b/include/asm-mips/sgi/hpc3.h
new file mode 100644
index 00000000000..a5b988d7327
--- /dev/null
+++ b/include/asm-mips/sgi/hpc3.h
@@ -0,0 +1,317 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * hpc3.h: Definitions for SGI HPC3 controller
+ *
+ * Copyright (C) 1996 David S. Miller
+ * Copyright (C) 1998 Ralf Baechle
+ */
+
+#ifndef _SGI_HPC3_H
+#define _SGI_HPC3_H
+
+#include <linux/types.h>
+#include <asm/page.h>
+
+/* An HPC DMA descriptor. */
+struct hpc_dma_desc {
+	u32 pbuf;	/* physical address of data buffer */
+	u32 cntinfo;	/* counter and info bits */
+#define HPCDMA_EOX	0x80000000 /* last desc in chain for tx */
+#define HPCDMA_EOR	0x80000000 /* last desc in chain for rx */
+#define HPCDMA_EOXP	0x40000000 /* end of packet for tx */
+#define HPCDMA_EORP	0x40000000 /* end of packet for rx */
+#define HPCDMA_XIE	0x20000000 /* irq generated when at end of this desc */
+#define HPCDMA_XIU	0x01000000 /* Tx buffer in use by CPU. */
+#define HPCDMA_EIPC	0x00ff0000 /* SEEQ ethernet special xternal bytecount */
+#define HPCDMA_ETXD	0x00008000 /* set to one by HPC when packet tx'd */
+#define HPCDMA_OWN	0x00004000 /* Denotes ring buffer ownership on rx */
+#define HPCDMA_BCNT	0x00003fff /* size in bytes of this dma buffer */
+
+	u32 pnext;	/* paddr of next hpc_dma_desc if any */
+};
+
+/* The set of regs for each HPC3 PBUS DMA channel. */
+struct hpc3_pbus_dmacregs {
+	volatile u32 pbdma_bptr;	/* pbus dma channel buffer ptr */
+	volatile u32 pbdma_dptr;	/* pbus dma channel desc ptr */
+	u32 _unused0[0x1000/4 - 2];	/* padding */
+	volatile u32 pbdma_ctrl;	/* pbus dma channel control register has
+					 * copletely different meaning for read
+					 * compared with write */
+	/* read */
+#define HPC3_PDMACTRL_INT	0x00000001 /* interrupt (cleared after read) */
+#define HPC3_PDMACTRL_ISACT	0x00000002 /* channel active */
+	/* write */
+#define HPC3_PDMACTRL_SEL	0x00000002 /* little endian transfer */
+#define HPC3_PDMACTRL_RCV	0x00000004 /* direction is receive */
+#define HPC3_PDMACTRL_FLSH	0x00000008 /* enable flush for receive DMA */
+#define HPC3_PDMACTRL_ACT	0x00000010 /* start dma transfer */
+#define HPC3_PDMACTRL_LD	0x00000020 /* load enable for ACT */
+#define HPC3_PDMACTRL_RT	0x00000040 /* Use realtime GIO bus servicing */
+#define HPC3_PDMACTRL_HW	0x0000ff00 /* DMA High-water mark */
+#define HPC3_PDMACTRL_FB	0x003f0000 /* Ptr to beginning of fifo */
+#define HPC3_PDMACTRL_FE	0x3f000000 /* Ptr to end of fifo */
+
+	u32 _unused1[0x1000/4 - 1];	/* padding */
+};
+
+/* The HPC3 SCSI registers, this does not include external ones. */
+struct hpc3_scsiregs {
+	volatile u32 cbptr;	/* current dma buffer ptr, diagnostic use only */
+	volatile u32 ndptr;	/* next dma descriptor ptr */
+	u32 _unused0[0x1000/4 - 2];	/* padding */
+	volatile u32 bcd;	/* byte count info */
+#define HPC3_SBCD_BCNTMSK 0x00003fff /* bytes to transfer from/to memory */
+#define HPC3_SBCD_XIE     0x00004000 /* Send IRQ when done with cur buf */
+#define HPC3_SBCD_EOX     0x00008000 /* Indicates this is last buf in chain */
+
+	volatile u32 ctrl;    /* control register */
+#define HPC3_SCTRL_IRQ    0x01 /* IRQ asserted, either dma done or parity */
+#define HPC3_SCTRL_ENDIAN 0x02 /* DMA endian mode, 0=big 1=little */
+#define HPC3_SCTRL_DIR    0x04 /* DMA direction, 1=dev2mem 0=mem2dev */
+#define HPC3_SCTRL_FLUSH  0x08 /* Tells HPC3 to flush scsi fifos */
+#define HPC3_SCTRL_ACTIVE 0x10 /* SCSI DMA channel is active */
+#define HPC3_SCTRL_AMASK  0x20 /* DMA active inhibits PIO */
+#define HPC3_SCTRL_CRESET 0x40 /* Resets dma channel and external controller */
+#define HPC3_SCTRL_PERR   0x80 /* Bad parity on HPC3 iface to scsi controller */
+
+	volatile u32 gfptr;	/* current GIO fifo ptr */
+	volatile u32 dfptr;	/* current device fifo ptr */
+	volatile u32 dconfig;	/* DMA configuration register */
+#define HPC3_SDCFG_HCLK 0x00001 /* Enable DMA half clock mode */
+#define HPC3_SDCFG_D1   0x00006 /* Cycles to spend in D1 state */
+#define HPC3_SDCFG_D2   0x00038 /* Cycles to spend in D2 state */
+#define HPC3_SDCFG_D3   0x001c0 /* Cycles to spend in D3 state */
+#define HPC3_SDCFG_HWAT 0x00e00 /* DMA high water mark */
+#define HPC3_SDCFG_HW   0x01000 /* Enable 16-bit halfword DMA accesses to scsi */
+#define HPC3_SDCFG_SWAP 0x02000 /* Byte swap all DMA accesses */
+#define HPC3_SDCFG_EPAR 0x04000 /* Enable parity checking for DMA */
+#define HPC3_SDCFG_POLL 0x08000 /* hd_dreq polarity control */
+#define HPC3_SDCFG_ERLY 0x30000 /* hd_dreq behavior control bits */
+
+	volatile u32 pconfig;	/* PIO configuration register */
+#define HPC3_SPCFG_P3   0x0003 /* Cycles to spend in P3 state */
+#define HPC3_SPCFG_P2W  0x001c /* Cycles to spend in P2 state for writes */
+#define HPC3_SPCFG_P2R  0x01e0 /* Cycles to spend in P2 state for reads */
+#define HPC3_SPCFG_P1   0x0e00 /* Cycles to spend in P1 state */
+#define HPC3_SPCFG_HW   0x1000 /* Enable 16-bit halfword PIO accesses to scsi */
+#define HPC3_SPCFG_SWAP 0x2000 /* Byte swap all PIO accesses */
+#define HPC3_SPCFG_EPAR 0x4000 /* Enable parity checking for PIO */
+#define HPC3_SPCFG_FUJI 0x8000 /* Fujitsu scsi controller mode for faster dma/pio */
+
+	u32 _unused1[0x1000/4 - 6];	/* padding */
+};
+
+/* SEEQ ethernet HPC3 registers, only one seeq per HPC3. */
+struct hpc3_ethregs {
+	/* Receiver registers. */
+	volatile u32 rx_cbptr;   /* current dma buffer ptr, diagnostic use only */
+	volatile u32 rx_ndptr;   /* next dma descriptor ptr */
+	u32 _unused0[0x1000/4 - 2];	/* padding */
+	volatile u32 rx_bcd;	/* byte count info */
+#define HPC3_ERXBCD_BCNTMSK 0x00003fff /* bytes to be sent to memory */
+#define HPC3_ERXBCD_XIE     0x20000000 /* HPC3 interrupts cpu at end of this buf */
+#define HPC3_ERXBCD_EOX     0x80000000 /* flags this as end of descriptor chain */
+
+	volatile u32 rx_ctrl;	/* control register */
+#define HPC3_ERXCTRL_STAT50 0x0000003f /* Receive status reg bits of Seeq8003 */
+#define HPC3_ERXCTRL_STAT6  0x00000040 /* Rdonly irq status */
+#define HPC3_ERXCTRL_STAT7  0x00000080 /* Rdonlt old/new status bit from Seeq */
+#define HPC3_ERXCTRL_ENDIAN 0x00000100 /* Endian for dma channel, little=1 big=0 */
+#define HPC3_ERXCTRL_ACTIVE 0x00000200 /* Tells if DMA transfer is in progress */
+#define HPC3_ERXCTRL_AMASK  0x00000400 /* Tells if ACTIVE inhibits PIO's to hpc3 */
+#define HPC3_ERXCTRL_RBO    0x00000800 /* Receive buffer overflow if set to 1 */
+
+	volatile u32 rx_gfptr;	/* current GIO fifo ptr */
+	volatile u32 rx_dfptr;	/* current device fifo ptr */
+	u32 _unused1;		/* padding */
+	volatile u32 rx_reset;	/* reset register */
+#define HPC3_ERXRST_CRESET 0x1	/* Reset dma channel and external controller */
+#define HPC3_ERXRST_CLRIRQ 0x2	/* Clear channel interrupt */
+#define HPC3_ERXRST_LBACK  0x4	/* Enable diagnostic loopback mode of Seeq8003 */
+
+	volatile u32 rx_dconfig;	/* DMA configuration register */
+#define HPC3_ERXDCFG_D1    0x0000f /* Cycles to spend in D1 state for PIO */
+#define HPC3_ERXDCFG_D2    0x000f0 /* Cycles to spend in D2 state for PIO */
+#define HPC3_ERXDCFG_D3    0x00f00 /* Cycles to spend in D3 state for PIO */
+#define HPC3_ERXDCFG_WCTRL 0x01000 /* Enable writes of desc into ex ctrl port */
+#define HPC3_ERXDCFG_FRXDC 0x02000 /* Clear eop stat bits upon rxdc, hw seeq fix */
+#define HPC3_ERXDCFG_FEOP  0x04000 /* Bad packet marker timeout enable */
+#define HPC3_ERXDCFG_FIRQ  0x08000 /* Another bad packet timeout enable */
+#define HPC3_ERXDCFG_PTO   0x30000 /* Programmed timeout value for above two */
+
+	volatile u32 rx_pconfig;	/* PIO configuration register */
+#define HPC3_ERXPCFG_P1    0x000f /* Cycles to spend in P1 state for PIO */
+#define HPC3_ERXPCFG_P2    0x00f0 /* Cycles to spend in P2 state for PIO */
+#define HPC3_ERXPCFG_P3    0x0f00 /* Cycles to spend in P3 state for PIO */
+#define HPC3_ERXPCFG_TST   0x1000 /* Diagnistic ram test feature bit */
+
+	u32 _unused2[0x1000/4 - 8];	/* padding */
+
+	/* Transmitter registers. */
+	volatile u32 tx_cbptr;	/* current dma buffer ptr, diagnostic use only */
+	volatile u32 tx_ndptr;	/* next dma descriptor ptr */
+	u32 _unused3[0x1000/4 - 2];	/* padding */
+	volatile u32 tx_bcd;		/* byte count info */
+#define HPC3_ETXBCD_BCNTMSK 0x00003fff	/* bytes to be read from memory */
+#define HPC3_ETXBCD_ESAMP   0x10000000	/* if set, too late to add descriptor */
+#define HPC3_ETXBCD_XIE     0x20000000	/* Interrupt cpu at end of cur desc */
+#define HPC3_ETXBCD_EOP     0x40000000	/* Last byte of cur buf is end of packet */
+#define HPC3_ETXBCD_EOX     0x80000000	/* This buf is the end of desc chain */
+
+	volatile u32 tx_ctrl;		/* control register */
+#define HPC3_ETXCTRL_STAT30 0x0000000f	/* Rdonly copy of seeq tx stat reg */
+#define HPC3_ETXCTRL_STAT4  0x00000010	/* Indicate late collision occurred */
+#define HPC3_ETXCTRL_STAT75 0x000000e0	/* Rdonly irq status from seeq */
+#define HPC3_ETXCTRL_ENDIAN 0x00000100	/* DMA channel endian mode, 1=little 0=big */
+#define HPC3_ETXCTRL_ACTIVE 0x00000200	/* DMA tx channel is active */
+#define HPC3_ETXCTRL_AMASK  0x00000400	/* Indicates ACTIVE inhibits PIO's */
+
+	volatile u32 tx_gfptr;		/* current GIO fifo ptr */
+	volatile u32 tx_dfptr;		/* current device fifo ptr */
+	u32 _unused4[0x1000/4 - 4];	/* padding */
+};
+
+struct hpc3_regs {
+	/* First regs for the PBUS 8 dma channels. */
+	struct hpc3_pbus_dmacregs pbdma[8];
+
+	/* Now the HPC scsi registers, we get two scsi reg sets. */
+	struct hpc3_scsiregs scsi_chan0, scsi_chan1;
+
+	/* The SEEQ hpc3 ethernet dma/control registers. */
+	struct hpc3_ethregs ethregs;
+
+	/* Here are where the hpc3 fifo's can be directly accessed
+	 * via PIO accesses.  Under normal operation we never stick
+	 * our grubby paws in here so it's just padding. */
+	u32 _unused0[0x18000/4];
+
+	/* HPC3 irq status regs.  Due to a peculiar bug you need to
+	 * look at two different register addresses to get at all of
+	 * the status bits.  The first reg can only reliably report
+	 * bits 4:0 of the status, and the second reg can only
+	 * reliably report bits 9:5 of the hpc3 irq status.  I told
+	 * you it was a peculiar bug. ;-)
+	 */
+	volatile u32 istat0;		/* Irq status, only bits <4:0> reliable. */
+#define HPC3_ISTAT_PBIMASK	0x0ff	/* irq bits for pbus devs 0 --> 7 */
+#define HPC3_ISTAT_SC0MASK	0x100	/* irq bit for scsi channel 0 */
+#define HPC3_ISTAT_SC1MASK	0x200	/* irq bit for scsi channel 1 */
+
+	volatile u32 gio_misc;		/* GIO misc control bits. */
+#define HPC3_GIOMISC_ERTIME	0x1	/* Enable external timer real time. */
+#define HPC3_GIOMISC_DENDIAN	0x2	/* dma descriptor endian, 1=lit 0=big */
+
+	volatile u32 eeprom;		/* EEPROM data reg. */
+#define HPC3_EEPROM_EPROT	0x01	/* Protect register enable */
+#define HPC3_EEPROM_CSEL	0x02	/* Chip select */
+#define HPC3_EEPROM_ECLK	0x04	/* EEPROM clock */
+#define HPC3_EEPROM_DATO	0x08	/* Data out */
+#define HPC3_EEPROM_DATI	0x10	/* Data in */
+
+	volatile u32 istat1;		/* Irq status, only bits <9:5> reliable. */
+	volatile u32 bestat;		/* Bus error interrupt status reg. */
+#define HPC3_BESTAT_BLMASK	0x000ff	/* Bus lane where bad parity occurred */
+#define HPC3_BESTAT_CTYPE	0x00100	/* Bus cycle type, 0=PIO 1=DMA */
+#define HPC3_BESTAT_PIDSHIFT	9
+#define HPC3_BESTAT_PIDMASK	0x3f700	/* DMA channel parity identifier */
+
+	u32 _unused1[0x14000/4 - 5];	/* padding */
+	
+	/* Now direct PIO per-HPC3 peripheral access to external regs. */
+	volatile u32 scsi0_ext[256];	/* SCSI channel 0 external regs */
+	u32 _unused2[0x7c00/4];
+	volatile u32 scsi1_ext[256];	/* SCSI channel 1 external regs */
+	u32 _unused3[0x7c00/4];
+	volatile u32 eth_ext[320];	/* Ethernet external registers */
+	u32 _unused4[0x3b00/4];
+
+	/* Per-peripheral device external registers and DMA/PIO control. */
+	volatile u32 pbus_extregs[16][256];
+	volatile u32 pbus_dmacfg[8][128];
+	/* Cycles to spend in D3 for reads */
+#define HPC3_DMACFG_D3R_MASK		0x00000001
+#define HPC3_DMACFG_D3R_SHIFT		0
+	/* Cycles to spend in D4 for reads */
+#define HPC3_DMACFG_D4R_MASK		0x0000001e
+#define HPC3_DMACFG_D4R_SHIFT		1
+	/* Cycles to spend in D5 for reads */
+#define HPC3_DMACFG_D5R_MASK		0x000001e0
+#define HPC3_DMACFG_D5R_SHIFT		5
+	/* Cycles to spend in D3 for writes */
+#define HPC3_DMACFG_D3W_MASK		0x00000200
+#define HPC3_DMACFG_D3W_SHIFT		9
+	/* Cycles to spend in D4 for writes */
+#define HPC3_DMACFG_D4W_MASK		0x00003c00
+#define HPC3_DMACFG_D4W_SHIFT		10
+	/* Cycles to spend in D5 for writes */
+#define HPC3_DMACFG_D5W_MASK		0x0003c000
+#define HPC3_DMACFG_D5W_SHIFT		14
+	/* Enable 16-bit DMA access mode */
+#define HPC3_DMACFG_DS16		0x00040000
+	/* Places halfwords on high 16 bits of bus */
+#define HPC3_DMACFG_EVENHI		0x00080000
+	/* Make this device real time */
+#define HPC3_DMACFG_RTIME		0x00200000
+	/* 5 bit burst count for DMA device */
+#define HPC3_DMACFG_BURST_MASK		0x07c00000
+#define HPC3_DMACFG_BURST_SHIFT	22
+	/* Use live pbus_dreq unsynchronized signal */
+#define HPC3_DMACFG_DRQLIVE		0x08000000
+	volatile u32 pbus_piocfg[16][64];
+	/* Cycles to spend in P2 state for reads */
+#define HPC3_PIOCFG_P2R_MASK		0x00001
+#define HPC3_PIOCFG_P2R_SHIFT		0
+	/* Cycles to spend in P3 state for reads */
+#define HPC3_PIOCFG_P3R_MASK		0x0001e
+#define HPC3_PIOCFG_P3R_SHIFT		1
+	/* Cycles to spend in P4 state for reads */
+#define HPC3_PIOCFG_P4R_MASK		0x001e0
+#define HPC3_PIOCFG_P4R_SHIFT		5
+	/* Cycles to spend in P2 state for writes */
+#define HPC3_PIOCFG_P2W_MASK		0x00200
+#define HPC3_PIOCFG_P2W_SHIFT		9
+	/* Cycles to spend in P3 state for writes */
+#define HPC3_PIOCFG_P3W_MASK		0x03c00
+#define HPC3_PIOCFG_P3W_SHIFT		10
+	/* Cycles to spend in P4 state for writes */
+#define HPC3_PIOCFG_P4W_MASK		0x3c000
+#define HPC3_PIOCFG_P4W_SHIFT		14
+	/* Enable 16-bit PIO accesses */
+#define HPC3_PIOCFG_DS16		0x40000
+	/* Place even address bits in bits <15:8> */
+#define HPC3_PIOCFG_EVENHI		0x80000
+
+	/* PBUS PROM control regs. */
+	volatile u32 pbus_promwe;	/* PROM write enable register */
+#define HPC3_PROM_WENAB	0x1	/* Enable writes to the PROM */
+
+	u32 _unused5[0x0800/4 - 1];
+	volatile u32 pbus_promswap;	/* Chip select swap reg */
+#define HPC3_PROM_SWAP	0x1	/* invert GIO addr bit to select prom0 or prom1 */
+
+	u32 _unused6[0x0800/4 - 1];
+	volatile u32 pbus_gout;	/* PROM general purpose output reg */
+#define HPC3_PROM_STAT	0x1	/* General purpose status bit in gout */
+
+	u32 _unused7[0x1000/4 - 1];
+	volatile u32 rtcregs[14];	/* Dallas clock registers */
+	u32 _unused8[50];
+	volatile u32 bbram[8192-50-14];	/* Battery backed ram */
+};
+
+/* 
+ * It is possible to have two HPC3's within the address space on
+ * one machine, though only having one is more likely on an Indy.
+ */
+extern struct hpc3_regs *hpc3c0, *hpc3c1;
+#define HPC3_CHIP0_BASE		0x1fb80000	/* physical */
+#define HPC3_CHIP1_BASE		0x1fb00000	/* physical */
+
+extern void sgihpc_init(void);
+
+#endif /* _SGI_HPC3_H */
diff --git a/include/asm-mips/sgi/ioc.h b/include/asm-mips/sgi/ioc.h
new file mode 100644
index 00000000000..169187f53fb
--- /dev/null
+++ b/include/asm-mips/sgi/ioc.h
@@ -0,0 +1,200 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * ioc.h: Definitions for SGI I/O Controller
+ *
+ * Copyright (C) 1996 David S. Miller
+ * Copyright (C) 1997, 1998, 1999, 2000 Ralf Baechle
+ * Copyright (C) 2001, 2003 Ladislav Michl
+ */
+
+#ifndef _SGI_IOC_H
+#define _SGI_IOC_H
+
+#include <linux/types.h>
+#include <asm/sgi/pi1.h>
+
+/* 
+ * All registers are 8-bit wide alligned on 32-bit boundary. Bad things
+ * happen if you try word access them. You have been warned.
+ */
+
+struct sgioc_uart_regs {
+	u8 _ctrl1[3];
+	volatile u8 ctrl1;
+	u8 _data1[3];
+	volatile u8 data1;
+	u8 _ctrl2[3];
+	volatile u8 ctrl2;
+	u8 _data2[3];
+	volatile u8 data2;
+};
+
+struct sgioc_keyb_regs {
+	u8 _data[3];
+	volatile u8 data;
+	u8 _command[3];
+	volatile u8 command;
+};
+
+struct sgint_regs {
+	u8 _istat0[3];
+	volatile u8 istat0;		/* Interrupt status zero */
+#define SGINT_ISTAT0_FFULL	0x01
+#define SGINT_ISTAT0_SCSI0	0x02
+#define SGINT_ISTAT0_SCSI1	0x04
+#define SGINT_ISTAT0_ENET	0x08
+#define SGINT_ISTAT0_GFXDMA	0x10
+#define SGINT_ISTAT0_PPORT	0x20
+#define SGINT_ISTAT0_HPC2	0x40
+#define SGINT_ISTAT0_LIO2	0x80
+	u8 _imask0[3];
+	volatile u8 imask0;		/* Interrupt mask zero */
+	u8 _istat1[3];
+	volatile u8 istat1;		/* Interrupt status one */
+#define SGINT_ISTAT1_ISDNI	0x01
+#define SGINT_ISTAT1_PWR	0x02
+#define SGINT_ISTAT1_ISDNH	0x04
+#define SGINT_ISTAT1_LIO3	0x08
+#define SGINT_ISTAT1_HPC3	0x10
+#define SGINT_ISTAT1_AFAIL	0x20
+#define SGINT_ISTAT1_VIDEO	0x40
+#define SGINT_ISTAT1_GIO2	0x80
+	u8 _imask1[3];
+	volatile u8 imask1;		/* Interrupt mask one */
+	u8 _vmeistat[3];
+	volatile u8 vmeistat;		/* VME interrupt status */
+	u8 _cmeimask0[3];
+	volatile u8 cmeimask0;		/* VME interrupt mask zero */
+	u8 _cmeimask1[3];
+	volatile u8 cmeimask1;		/* VME interrupt mask one */
+	u8 _cmepol[3];
+	volatile u8 cmepol;		/* VME polarity */
+	u8 _tclear[3];
+	volatile u8 tclear;
+	u8 _errstat[3];
+	volatile u8 errstat;	/* Error status reg, reserved on INT2 */
+	u32 _unused0[2];
+	u8 _tcnt0[3];
+	volatile u8 tcnt0;		/* counter 0 */
+	u8 _tcnt1[3];
+	volatile u8 tcnt1;		/* counter 1 */
+	u8 _tcnt2[3];
+	volatile u8 tcnt2;		/* counter 2 */
+	u8 _tcword[3];
+	volatile u8 tcword;		/* control word */
+#define SGINT_TCWORD_BCD	0x01	/* Use BCD mode for counters */
+#define SGINT_TCWORD_MMASK	0x0e	/* Mode bitmask. */
+#define SGINT_TCWORD_MITC	0x00	/* IRQ on terminal count (doesn't work) */
+#define SGINT_TCWORD_MOS	0x02	/* One-shot IRQ mode. */
+#define SGINT_TCWORD_MRGEN	0x04	/* Normal rate generation */
+#define SGINT_TCWORD_MSWGEN	0x06	/* Square wave generator mode */
+#define SGINT_TCWORD_MSWST	0x08	/* Software strobe */
+#define SGINT_TCWORD_MHWST	0x0a	/* Hardware strobe */
+#define SGINT_TCWORD_CMASK	0x30	/* Command mask */
+#define SGINT_TCWORD_CLAT	0x00	/* Latch command */
+#define SGINT_TCWORD_CLSB	0x10	/* LSB read/write */
+#define SGINT_TCWORD_CMSB	0x20	/* MSB read/write */
+#define SGINT_TCWORD_CALL	0x30	/* Full counter read/write */
+#define SGINT_TCWORD_CNT0	0x00	/* Select counter zero */
+#define SGINT_TCWORD_CNT1	0x40	/* Select counter one */
+#define SGINT_TCWORD_CNT2	0x80	/* Select counter two */
+#define SGINT_TCWORD_CRBCK	0xc0	/* Readback command */
+};
+
+/*
+ * The timer is the good old 8254.  Unlike in PCs it's clocked at exactly 1MHz
+ */
+#define SGINT_TIMER_CLOCK	1000000
+
+/*
+ * This is the constant we're using for calibrating the counter.
+ */
+#define SGINT_TCSAMP_COUNTER	((SGINT_TIMER_CLOCK / HZ) + 255)
+
+/* We need software copies of these because they are write only. */
+extern u8 sgi_ioc_reset, sgi_ioc_write;
+
+struct sgioc_regs {
+	struct pi1_regs pport;
+	u32 _unused0[2];
+	struct sgioc_uart_regs uart;
+	struct sgioc_keyb_regs kbdmouse;
+	u8 _gcsel[3];
+	volatile u8 gcsel;
+	u8 _genctrl[3];
+	volatile u8 genctrl;
+	u8 _panel[3];
+	volatile u8 panel;
+#define SGIOC_PANEL_POWERON	0x01
+#define SGIOC_PANEL_POWERINTR	0x02
+#define SGIOC_PANEL_VOLDNINTR	0x10
+#define SGIOC_PANEL_VOLDNHOLD	0x20
+#define SGIOC_PANEL_VOLUPINTR	0x40
+#define SGIOC_PANEL_VOLUPHOLD	0x80
+	u32 _unused1;
+	u8 _sysid[3];
+	volatile u8 sysid;
+#define SGIOC_SYSID_FULLHOUSE	0x01
+#define SGIOC_SYSID_BOARDREV(x)	((x & 0xe0) > 5) 
+#define SGIOC_SYSID_CHIPREV(x)	((x & 0x1e) > 1)
+	u32 _unused2;
+	u8 _read[3];
+	volatile u8 read;
+	u32 _unused3;
+	u8 _dmasel[3];
+	volatile u8 dmasel;
+#define SGIOC_DMASEL_SCLK10MHZ	0x00	/* use 10MHZ serial clock */
+#define SGIOC_DMASEL_ISDNB	0x01	/* enable isdn B */
+#define SGIOC_DMASEL_ISDNA	0x02	/* enable isdn A */
+#define SGIOC_DMASEL_PPORT	0x04	/* use parallel DMA */
+#define SGIOC_DMASEL_SCLK667MHZ	0x10	/* use 6.67MHZ serial clock */
+#define SGIOC_DMASEL_SCLKEXT	0x20	/* use external serial clock */
+	u32 _unused4;
+	u8 _reset[3];
+	volatile u8 reset;
+#define SGIOC_RESET_PPORT	0x01	/* 0=parport reset, 1=nornal */
+#define SGIOC_RESET_KBDMOUSE	0x02	/* 0=kbdmouse reset, 1=normal */
+#define SGIOC_RESET_EISA	0x04	/* 0=eisa reset, 1=normal */
+#define SGIOC_RESET_ISDN	0x08	/* 0=isdn reset, 1=normal */
+#define SGIOC_RESET_LC0OFF	0x10	/* guiness: turn led off (red, else green) */
+#define SGIOC_RESET_LC1OFF	0x20	/* guiness: turn led off (green, else amber) */
+	u32 _unused5;
+	u8 _write[3];
+	volatile u8 write;
+#define SGIOC_WRITE_NTHRESH	0x01	/* use 4.5db threshhold */
+#define SGIOC_WRITE_TPSPEED	0x02	/* use 100ohm TP speed */
+#define SGIOC_WRITE_EPSEL	0x04	/* force cable mode: 1=AUI 0=TP */
+#define SGIOC_WRITE_EASEL	0x08	/* 1=autoselect 0=manual cable selection */
+#define SGIOC_WRITE_U1AMODE	0x10	/* 1=PC 0=MAC UART mode */
+#define SGIOC_WRITE_U0AMODE	0x20	/* 1=PC 0=MAC UART mode */
+#define SGIOC_WRITE_MLO		0x40	/* 1=4.75V 0=+5V */
+#define SGIOC_WRITE_MHI		0x80	/* 1=5.25V 0=+5V */
+	u32 _unused6;
+	struct sgint_regs int3;
+	u32 _unused7[16];
+	volatile u32 extio;		/* FullHouse only */
+#define EXTIO_S0_IRQ_3		0x8000	/* S0: vid.vsync */
+#define EXTIO_S0_IRQ_2		0x4000	/* S0: gfx.fifofull */
+#define EXTIO_S0_IRQ_1		0x2000	/* S0: gfx.int */
+#define EXTIO_S0_RETRACE	0x1000
+#define EXTIO_SG_IRQ_3		0x0800	/* SG: vid.vsync */
+#define EXTIO_SG_IRQ_2		0x0400	/* SG: gfx.fifofull */
+#define EXTIO_SG_IRQ_1		0x0200	/* SG: gfx.int */
+#define EXTIO_SG_RETRACE	0x0100
+#define EXTIO_GIO_33MHZ		0x0080
+#define EXTIO_EISA_BUSERR	0x0040
+#define EXTIO_MC_BUSERR		0x0020
+#define EXTIO_HPC3_BUSERR	0x0010
+#define EXTIO_S0_STAT_1		0x0008
+#define EXTIO_S0_STAT_0		0x0004
+#define EXTIO_SG_STAT_1		0x0002
+#define EXTIO_SG_STAT_0		0x0001
+};
+
+extern struct sgioc_regs *sgioc;
+extern struct sgint_regs *sgint;
+
+#endif
diff --git a/include/asm-mips/sgi/ip22.h b/include/asm-mips/sgi/ip22.h
new file mode 100644
index 00000000000..97d73adb4e4
--- /dev/null
+++ b/include/asm-mips/sgi/ip22.h
@@ -0,0 +1,77 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * ip22.h: Definitions for SGI IP22 machines
+ *
+ * Copyright (C) 1996 David S. Miller
+ * Copyright (C) 1997, 1998, 1999, 2000 Ralf Baechle
+ */
+
+#ifndef _SGI_IP22_H
+#define _SGI_IP22_H
+
+/* 
+ * These are the virtual IRQ numbers, we divide all IRQ's into
+ * 'spaces', the 'space' determines where and how to enable/disable
+ * that particular IRQ on an SGI machine. HPC DMA and MC DMA interrups
+ * are not supported this way. Driver is supposed to allocate HPC/MC
+ * interrupt as shareable and then look to proper status bit (see
+ * HAL2 driver). This will prevent many complications, trust me ;-)
+ */
+
+#include <asm/sgi/ioc.h>
+
+#define SGINT_EISA	0	/* 16 EISA irq levels (Indigo2) */
+#define SGINT_CPU	16	/* MIPS CPU define 8 interrupt sources */
+#define SGINT_LOCAL0	24	/* 8 local0 irq levels */
+#define SGINT_LOCAL1	32	/* 8 local1 irq levels */
+#define SGINT_LOCAL2	40	/* 8 local2 vectored irq levels */
+#define SGINT_LOCAL3	48	/* 8 local3 vectored irq levels */
+#define SGINT_END	56	/* End of 'spaces' */
+
+/*
+ * Individual interrupt definitions for the Indy and Indigo2
+ */
+
+#define SGI_SOFT_0_IRQ	SGINT_CPU + 0
+#define SGI_SOFT_1_IRQ	SGINT_CPU + 1
+#define SGI_LOCAL_0_IRQ	SGINT_CPU + 2
+#define SGI_LOCAL_1_IRQ	SGINT_CPU + 3
+#define SGI_8254_0_IRQ	SGINT_CPU + 4
+#define SGI_8254_1_IRQ	SGINT_CPU + 5
+#define SGI_BUSERR_IRQ	SGINT_CPU + 6
+#define SGI_TIMER_IRQ	SGINT_CPU + 7
+
+#define SGI_FIFO_IRQ	SGINT_LOCAL0 + 0	/* FIFO full */
+#define SGI_GIO_0_IRQ	SGI_FIFO_IRQ		/* GIO-0 */
+#define SGI_WD93_0_IRQ	SGINT_LOCAL0 + 1	/* 1st onboard WD93 */
+#define SGI_WD93_1_IRQ	SGINT_LOCAL0 + 2	/* 2nd onboard WD93 */
+#define SGI_ENET_IRQ	SGINT_LOCAL0 + 3	/* onboard ethernet */
+#define SGI_MCDMA_IRQ	SGINT_LOCAL0 + 4	/* MC DMA done */
+#define SGI_PARPORT_IRQ	SGINT_LOCAL0 + 5	/* Parallel port */
+#define SGI_GIO_1_IRQ	SGINT_LOCAL0 + 6	/* GE / GIO-1 / 2nd-HPC */
+#define SGI_MAP_0_IRQ	SGINT_LOCAL0 + 7	/* Mappable interrupt 0 */
+
+#define SGI_GPL0_IRQ	SGINT_LOCAL1 + 0	/* General Purpose LOCAL1_N<0> */
+#define SGI_PANEL_IRQ	SGINT_LOCAL1 + 1	/* front panel */
+#define SGI_GPL2_IRQ	SGINT_LOCAL1 + 2	/* General Purpose LOCAL1_N<2> */
+#define SGI_MAP_1_IRQ	SGINT_LOCAL1 + 3	/* Mappable interrupt 1 */
+#define SGI_HPCDMA_IRQ	SGINT_LOCAL1 + 4	/* HPC DMA done */
+#define SGI_ACFAIL_IRQ	SGINT_LOCAL1 + 5	/* AC fail */
+#define SGI_VINO_IRQ	SGINT_LOCAL1 + 6	/* Indy VINO */
+#define SGI_GIO_2_IRQ	SGINT_LOCAL1 + 7	/* Vert retrace / GIO-2 */
+
+/* Mapped interrupts. These interrupts may be mapped to either 0, or 1 */
+#define SGI_VERT_IRQ	SGINT_LOCAL2 + 0	/* INT3: newport vertical status */
+#define SGI_EISA_IRQ	SGINT_LOCAL2 + 3	/* EISA interrupts */
+#define SGI_KEYBD_IRQ	SGINT_LOCAL2 + 4	/* keyboard */
+#define SGI_SERIAL_IRQ	SGINT_LOCAL2 + 5	/* onboard serial */
+
+#define ip22_is_fullhouse()	(sgioc->sysid & SGIOC_SYSID_FULLHOUSE)
+
+extern unsigned short ip22_eeprom_read(volatile unsigned int *ctrl, int reg);
+extern unsigned short ip22_nvram_read(int reg);
+
+#endif
diff --git a/include/asm-mips/sgi/mc.h b/include/asm-mips/sgi/mc.h
new file mode 100644
index 00000000000..fd98f930607
--- /dev/null
+++ b/include/asm-mips/sgi/mc.h
@@ -0,0 +1,231 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * mc.h: Definitions for SGI Memory Controller
+ *
+ * Copyright (C) 1996 David S. Miller
+ * Copyright (C) 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+
+#ifndef _SGI_MC_H
+#define _SGI_MC_H
+
+struct sgimc_regs {
+	u32 _unused0;
+	volatile u32 cpuctrl0;	/* CPU control register 0, readwrite */
+#define SGIMC_CCTRL0_REFS	0x0000000f /* REFS mask */
+#define SGIMC_CCTRL0_EREFRESH	0x00000010 /* Memory refresh enable */
+#define SGIMC_CCTRL0_EPERRGIO	0x00000020 /* GIO parity error enable */
+#define SGIMC_CCTRL0_EPERRMEM	0x00000040 /* Main mem parity error enable */
+#define SGIMC_CCTRL0_EPERRCPU	0x00000080 /* CPU bus parity error enable */
+#define SGIMC_CCTRL0_WDOG	0x00000100 /* Watchdog timer enable */
+#define SGIMC_CCTRL0_SYSINIT	0x00000200 /* System init bit */
+#define SGIMC_CCTRL0_GFXRESET	0x00000400 /* Graphics interface reset */
+#define SGIMC_CCTRL0_EISALOCK	0x00000800 /* Lock CPU from memory for EISA */
+#define SGIMC_CCTRL0_EPERRSCMD	0x00001000 /* SysCMD bus parity error enable */
+#define SGIMC_CCTRL0_IENAB	0x00002000 /* Allow interrupts from MC */
+#define SGIMC_CCTRL0_ESNOOP	0x00004000 /* Snooping I/O enable */
+#define SGIMC_CCTRL0_EPROMWR	0x00008000 /* Prom writes from cpu enable */
+#define SGIMC_CCTRL0_WRESETPMEM	0x00010000 /* Perform warm reset, preserves mem */
+#define SGIMC_CCTRL0_LENDIAN	0x00020000 /* Put MC in little-endian mode */
+#define SGIMC_CCTRL0_WRESETDMEM	0x00040000 /* Warm reset, destroys mem contents */
+#define SGIMC_CCTRL0_CMEMBADPAR	0x02000000 /* Generate bad perr from cpu to mem */
+#define SGIMC_CCTRL0_R4KNOCHKPARR 0x04000000 /* Don't chk parity on mem data reads */
+#define SGIMC_CCTRL0_GIOBTOB	0x08000000 /* Allow GIO back to back writes */
+	u32 _unused1;
+	volatile u32 cpuctrl1;	/* CPU control register 1, readwrite */
+#define SGIMC_CCTRL1_EGIOTIMEO	0x00000010 /* GIO bus timeout enable */
+#define SGIMC_CCTRL1_FIXEDEHPC	0x00001000 /* Fixed HPC endianness */
+#define SGIMC_CCTRL1_LITTLEHPC	0x00002000 /* Little endian HPC */
+#define SGIMC_CCTRL1_FIXEDEEXP0	0x00004000 /* Fixed EXP0 endianness */
+#define SGIMC_CCTRL1_LITTLEEXP0	0x00008000 /* Little endian EXP0 */
+#define SGIMC_CCTRL1_FIXEDEEXP1	0x00010000 /* Fixed EXP1 endianness */
+#define SGIMC_CCTRL1_LITTLEEXP1	0x00020000 /* Little endian EXP1 */
+
+	u32 _unused2;
+	volatile u32 watchdogt;	/* Watchdog reg rdonly, write clears */
+
+	u32 _unused3;
+	volatile u32 systemid;	/* MC system ID register, readonly */
+#define SGIMC_SYSID_MASKREV	0x0000000f /* Revision of MC controller */
+#define SGIMC_SYSID_EPRESENT	0x00000010 /* Indicates presence of EISA bus */
+
+	u32 _unused4[3];
+	volatile u32 divider;	/* Divider reg for RPSS */
+
+	u32 _unused5;
+	volatile u32 eeprom;	/* EEPROM byte reg for r4k */
+#define SGIMC_EEPROM_PRE	0x00000001 /* eeprom chip PRE pin assertion */
+#define SGIMC_EEPROM_CSEL	0x00000002 /* Active high, eeprom chip select */
+#define SGIMC_EEPROM_SECLOCK	0x00000004 /* EEPROM serial clock */
+#define SGIMC_EEPROM_SDATAO	0x00000008 /* Serial EEPROM data-out */
+#define SGIMC_EEPROM_SDATAI	0x00000010 /* Serial EEPROM data-in */
+
+	u32 _unused6[3];
+	volatile u32 rcntpre;	/* Preload refresh counter */
+
+	u32 _unused7;
+	volatile u32 rcounter;	/* Readonly refresh counter */
+
+	u32 _unused8[13];
+	volatile u32 giopar;	/* Parameter word for GIO64 */
+#define SGIMC_GIOPAR_HPC64	0x00000001 /* HPC talks to GIO using 64-bits */
+#define SGIMC_GIOPAR_GFX64	0x00000002 /* GFX talks to GIO using 64-bits */
+#define SGIMC_GIOPAR_EXP064	0x00000004 /* EXP(slot0) talks using 64-bits */
+#define SGIMC_GIOPAR_EXP164	0x00000008 /* EXP(slot1) talks using 64-bits */
+#define SGIMC_GIOPAR_EISA64	0x00000010 /* EISA bus talks 64-bits to GIO */
+#define SGIMC_GIOPAR_HPC264	0x00000020 /* 2nd HPX talks 64-bits to GIO */
+#define SGIMC_GIOPAR_RTIMEGFX	0x00000040 /* GFX device has realtime attr */
+#define SGIMC_GIOPAR_RTIMEEXP0	0x00000080 /* EXP(slot0) has realtime attr */
+#define SGIMC_GIOPAR_RTIMEEXP1	0x00000100 /* EXP(slot1) has realtime attr */
+#define SGIMC_GIOPAR_MASTEREISA	0x00000200 /* EISA bus can act as bus master */
+#define SGIMC_GIOPAR_ONEBUS	0x00000400 /* Exists one GIO64 pipelined bus */
+#define SGIMC_GIOPAR_MASTERGFX	0x00000800 /* GFX can act as a bus master */
+#define SGIMC_GIOPAR_MASTEREXP0	0x00001000 /* EXP(slot0) can bus master */
+#define SGIMC_GIOPAR_MASTEREXP1	0x00002000 /* EXP(slot1) can bus master */
+#define SGIMC_GIOPAR_PLINEEXP0	0x00004000 /* EXP(slot0) has pipeline attr */
+#define SGIMC_GIOPAR_PLINEEXP1	0x00008000 /* EXP(slot1) has pipeline attr */
+
+	u32 _unused9;
+	volatile u32 cputp;	/* CPU bus arb time period */
+
+	u32 _unused10[3];
+	volatile u32 lbursttp;	/* Time period for long bursts */
+
+	/* MC chip can drive up to 4 bank 4 SIMMs each. All SIMMs in bank must
+	 * be the same size. The size encoding for supported SIMMs is bellow */
+	u32 _unused11[9];
+	volatile u32 mconfig0;	/* Memory config register zero */
+	u32 _unused12;
+	volatile u32 mconfig1;	/* Memory config register one */
+#define SGIMC_MCONFIG_BASEADDR	0x000000ff /* Base address of bank*/
+#define SGIMC_MCONFIG_RMASK	0x00001f00 /* Ram config bitmask */
+#define SGIMC_MCONFIG_BVALID	0x00002000 /* Bank is valid */
+#define SGIMC_MCONFIG_SBANKS	0x00004000 /* Number of subbanks */
+
+	u32 _unused13;
+	volatile u32 cmacc;        /* Mem access config for CPU */
+	u32 _unused14;
+	volatile u32 gmacc;        /* Mem access config for GIO */
+
+	/* This define applies to both cmacc and gmacc registers above. */
+#define SGIMC_MACC_ALIASBIG	0x20000000 /* 512MB home for alias */
+
+	/* Error address/status regs from GIO and CPU perspectives. */
+	u32 _unused15;
+	volatile u32 cerr;	/* Error address reg for CPU */
+	u32 _unused16;
+	volatile u32 cstat;	/* Status reg for CPU */
+#define SGIMC_CSTAT_RD		0x00000100 /* read parity error */
+#define SGIMC_CSTAT_PAR		0x00000200 /* CPU parity error */
+#define SGIMC_CSTAT_ADDR	0x00000400 /* memory bus error bad addr */
+#define SGIMC_CSTAT_SYSAD_PAR	0x00000800 /* sysad parity error */
+#define SGIMC_CSTAT_SYSCMD_PAR	0x00001000 /* syscmd parity error */
+#define SGIMC_CSTAT_BAD_DATA	0x00002000 /* bad data identifier */
+#define SGIMC_CSTAT_PAR_MASK	0x00001f00 /* parity error mask */
+#define SGIMC_CSTAT_RD_PAR	(SGIMC_CSTAT_RD | SGIMC_CSTAT_PAR)
+
+	u32 _unused17;
+	volatile u32 gerr;	/* Error address reg for GIO */
+	u32 _unused18;
+	volatile u32 gstat;	/* Status reg for GIO */
+#define SGIMC_GSTAT_RD		0x00000100 /* read parity error */
+#define SGIMC_GSTAT_WR		0x00000200 /* write parity error */
+#define SGIMC_GSTAT_TIME	0x00000400 /* GIO bus timed out */
+#define SGIMC_GSTAT_PROM	0x00000800 /* write to PROM when PROM_EN not set */
+#define SGIMC_GSTAT_ADDR	0x00001000 /* parity error on addr cycle */
+#define SGIMC_GSTAT_BC		0x00002000 /* parity error on byte count cycle */
+#define SGIMC_GSTAT_PIO_RD	0x00004000 /* read data parity on pio */
+#define SGIMC_GSTAT_PIO_WR	0x00008000 /* write data parity on pio */
+
+	/* Special hard bus locking registers. */
+	u32 _unused19;
+	volatile u32 syssembit;		/* Uni-bit system semaphore */
+	u32 _unused20;
+	volatile u32 mlock;		/* Global GIO memory access lock */
+	u32 _unused21;
+	volatile u32 elock;		/* Locks EISA from GIO accesses */
+
+	/* GIO dma control registers. */
+	u32 _unused22[15];
+	volatile u32 gio_dma_trans;	/* DMA mask to translation GIO addrs */
+	u32 _unused23;
+	volatile u32 gio_dma_sbits;	/* DMA GIO addr substitution bits */
+	u32 _unused24;
+	volatile u32 dma_intr_cause;	/* DMA IRQ cause indicator bits */
+	u32 _unused25;
+	volatile u32 dma_ctrl;		/* Main DMA control reg */
+
+	/* DMA TLB entry 0 */
+	u32 _unused26[5];
+	volatile u32 dtlb_hi0;
+	u32 _unused27;
+	volatile u32 dtlb_lo0;
+
+	/* DMA TLB entry 1 */
+	u32 _unused28;
+	volatile u32 dtlb_hi1;
+	u32 _unused29;
+	volatile u32 dtlb_lo1;
+
+	/* DMA TLB entry 2 */
+	u32 _unused30;
+	volatile u32 dtlb_hi2;
+	u32 _unused31;
+	volatile u32 dtlb_lo2;
+
+	/* DMA TLB entry 3 */
+	u32 _unused32;
+	volatile u32 dtlb_hi3;
+	u32 _unused33;
+	volatile u32 dtlb_lo3;
+	
+	u32 _unused34[0x0392];
+	
+	u32 _unused35;
+	volatile u32 rpsscounter;	/* Chirps at 100ns */
+
+	u32 _unused36[0x1000/4-2*4];
+	
+	u32 _unused37;
+	volatile u32 maddronly;		/* Address DMA goes at */
+	u32 _unused38;
+	volatile u32 maddrpdeflts;	/* Same as above, plus set defaults */
+	u32 _unused39;
+	volatile u32 dmasz;		/* DMA count */
+	u32 _unused40;
+	volatile u32 ssize;		/* DMA stride size */
+	u32 _unused41;
+	volatile u32 gmaddronly;	/* Set GIO DMA but don't start trans */
+	u32 _unused42;
+	volatile u32 dmaddnpgo;		/* Set GIO DMA addr + start transfer */
+	u32 _unused43;
+	volatile u32 dmamode;		/* DMA mode config bit settings */
+	u32 _unused44;
+	volatile u32 dmaccount;		/* Zoom and byte count for DMA */
+	u32 _unused45;
+	volatile u32 dmastart;		/* Pedal to the metal. */
+	u32 _unused46;
+	volatile u32 dmarunning;	/* DMA op is in progress */
+	u32 _unused47;
+	volatile u32 maddrdefstart;	/* Set dma addr, defaults, and kick it */
+};
+
+extern struct sgimc_regs *sgimc;
+#define SGIMC_BASE		0x1fa00000	/* physical */
+
+/* Base location of the two ram banks found in IP2[0268] machines. */
+#define SGIMC_SEG0_BADDR	0x08000000
+#define SGIMC_SEG1_BADDR	0x20000000
+
+/* Maximum size of the above banks are per machine. */
+#define SGIMC_SEG0_SIZE_ALL		0x10000000 /* 256MB */
+#define SGIMC_SEG1_SIZE_IP20_IP22	0x08000000 /* 128MB */
+#define SGIMC_SEG1_SIZE_IP26_IP28	0x20000000 /* 512MB */
+
+extern void sgimc_init(void);
+
+#endif /* _SGI_MC_H */
diff --git a/include/asm-mips/sgi/pi1.h b/include/asm-mips/sgi/pi1.h
new file mode 100644
index 00000000000..c9506915dc5
--- /dev/null
+++ b/include/asm-mips/sgi/pi1.h
@@ -0,0 +1,71 @@
+/*
+ * pi1.h: Definitions for SGI PI1 parallel port
+ */
+
+#ifndef _SGI_PI1_H
+#define _SGI_PI1_H
+
+struct pi1_regs {
+	u8 _data[3];
+	volatile u8 data;
+	u8 _ctrl[3];
+	volatile u8 ctrl;
+#define PI1_CTRL_STROBE_N	0x01
+#define PI1_CTRL_AFD_N		0x02
+#define PI1_CTRL_INIT_N		0x04
+#define PI1_CTRL_SLIN_N		0x08
+#define PI1_CTRL_IRQ_ENA	0x10
+#define PI1_CTRL_DIR		0x20
+#define PI1_CTRL_SEL		0x40
+	u8 _status[3];
+	volatile u8 status;
+#define PI1_STAT_DEVID		0x03	/* bits 0-1 */
+#define PI1_STAT_NOINK		0x04	/* SGI MODE only */
+#define PI1_STAT_ERROR		0x08
+#define PI1_STAT_ONLINE		0x10
+#define PI1_STAT_PE		0x20
+#define PI1_STAT_ACK		0x40
+#define PI1_STAT_BUSY		0x80
+	u8 _dmactrl[3];
+	volatile u8 dmactrl;
+#define PI1_DMACTRL_FIFO_EMPTY	0x01    /* fifo empty R/O */
+#define PI1_DMACTRL_ABORT	0x02    /* reset DMA and internal fifo W/O */
+#define PI1_DMACTRL_STDMODE	0x00    /* bits 2-3 */
+#define PI1_DMACTRL_SGIMODE	0x04    /* bits 2-3 */
+#define PI1_DMACTRL_RICOHMODE	0x08    /* bits 2-3 */
+#define PI1_DMACTRL_HPMODE	0x0c    /* bits 2-3 */
+#define PI1_DMACTRL_BLKMODE	0x10    /* block mode */
+#define PI1_DMACTRL_FIFO_CLEAR	0x20    /* clear fifo W/O */
+#define PI1_DMACTRL_READ	0x40    /* read */
+#define PI1_DMACTRL_RUN		0x80    /* pedal to the metal */
+	u8 _intstat[3];
+	volatile u8 intstat;
+#define PI1_INTSTAT_ACK		0x04
+#define PI1_INTSTAT_FEMPTY	0x08
+#define PI1_INTSTAT_NOINK	0x10
+#define PI1_INTSTAT_ONLINE	0x20
+#define PI1_INTSTAT_ERR		0x40
+#define PI1_INTSTAT_PE		0x80
+	u8 _intmask[3];
+	volatile u8 intmask;		/* enabled low, reset high*/
+#define PI1_INTMASK_ACK		0x04
+#define PI1_INTMASK_FIFO_EMPTY	0x08
+#define PI1_INTMASK_NOINK	0x10
+#define PI1_INTMASK_ONLINE	0x20
+#define PI1_INTMASK_ERR		0x40
+#define PI1_INTMASK_PE		0x80
+	u8 _timer1[3];
+	volatile u8 timer1;
+#define PI1_TIME1		0x27
+	u8 _timer2[3];
+	volatile u8 timer2;
+#define PI1_TIME2		0x13
+	u8 _timer3[3];
+	volatile u8 timer3;
+#define PI1_TIME3		0x10
+	u8 _timer4[3];
+	volatile u8 timer4;
+#define PI1_TIME4		0x00
+};
+
+#endif
diff --git a/include/asm-mips/sgi/sgi.h b/include/asm-mips/sgi/sgi.h
new file mode 100644
index 00000000000..645cea7c0f8
--- /dev/null
+++ b/include/asm-mips/sgi/sgi.h
@@ -0,0 +1,47 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * sgi.h: Definitions specific to SGI machines.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@sgi.com)
+ */
+#ifndef _ASM_SGI_SGI_H
+#define _ASM_SGI_SGI_H
+
+/* UP=UniProcessor MP=MultiProcessor(capable) */
+enum sgi_mach {
+	ip4,	/* R2k UP */
+	ip5,	/* R2k MP */
+	ip6,	/* R3k UP */
+	ip7,	/* R3k MP */
+	ip9,	/* R3k UP */
+	ip12,	/* R3kA UP, Indigo */
+	ip15,	/* R3kA MP */
+	ip17,	/* R4K UP */
+	ip19,	/* R4K MP */
+	ip20,	/* R4K UP, Indigo */
+	ip21,	/* TFP MP */
+	ip22,	/* R4x00 UP, Indigo2 */
+	ip25,	/* R10k MP */
+	ip26,	/* TFP UP, Indigo2 */
+	ip27,	/* R10k MP, R12k MP, Origin */
+	ip28,	/* R10k UP, Indigo2 */
+	ip30,	/* Octane */
+	ip32,	/* O2 */
+};
+
+extern enum sgi_mach sgimach;
+extern void sgi_sysinit(void);
+
+/* Many I/O space registers are byte sized and are contained within
+ * one byte per word, specifically the MSB, this macro helps out.
+ */
+#ifdef __MIPSEL__
+#define SGI_MSB(regaddr)   (regaddr)
+#else
+#define SGI_MSB(regaddr)   ((regaddr) | 0x3)
+#endif
+
+#endif /* _ASM_SGI_SGI_H */