Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

5 files changed, 584 insertions, 0 deletions

diff --git a/kernel/arch/ia64/sn/include/ioerror.h b/kernel/arch/ia64/sn/include/ioerror.h
new file mode 100644
index 000000000..e68f2b078
--- /dev/null
+++ b/kernel/arch/ia64/sn/include/ioerror.h
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
+ */
+#ifndef _ASM_IA64_SN_IOERROR_H
+#define _ASM_IA64_SN_IOERROR_H
+
+/*
+ * IO error structure.
+ *
+ * This structure would expand to hold the information retrieved from
+ * all IO related error registers.
+ *
+ * This structure is defined to hold all system specific
+ * information related to a single error.
+ *
+ * This serves a couple of purpose.
+ *      - Error handling often involves translating one form of address to other
+ *        form. So, instead of having different data structures at each level,
+ *        we have a single structure, and the appropriate fields get filled in
+ *        at each layer.
+ *      - This provides a way to dump all error related information in any layer
+ *        of erorr handling (debugging aid).
+ *
+ * A second possibility is to allow each layer to define its own error
+ * data structure, and fill in the proper fields. This has the advantage
+ * of isolating the layers.
+ * A big concern is the potential stack usage (and overflow), if each layer
+ * defines these structures on stack (assuming we don't want to do kmalloc.
+ *
+ * Any layer wishing to pass extra information to a layer next to it in
+ * error handling hierarchy, can do so as a separate parameter.
+ */
+
+typedef struct io_error_s {
+    /* Bit fields indicating which structure fields are valid */
+    union {
+	struct {
+	    unsigned                ievb_errortype:1;
+	    unsigned                ievb_widgetnum:1;
+	    unsigned                ievb_widgetdev:1;
+	    unsigned                ievb_srccpu:1;
+	    unsigned                ievb_srcnode:1;
+	    unsigned                ievb_errnode:1;
+	    unsigned                ievb_sysioaddr:1;
+	    unsigned                ievb_xtalkaddr:1;
+	    unsigned                ievb_busspace:1;
+	    unsigned                ievb_busaddr:1;
+	    unsigned                ievb_vaddr:1;
+	    unsigned                ievb_memaddr:1;
+	    unsigned		    ievb_epc:1;
+	    unsigned		    ievb_ef:1;
+	    unsigned		    ievb_tnum:1;
+	} iev_b;
+	unsigned                iev_a;
+    } ie_v;
+
+    short                   ie_errortype;	/* error type: extra info about error */
+    short                   ie_widgetnum;	/* Widget number that's in error */
+    short                   ie_widgetdev;	/* Device within widget in error */
+    cpuid_t                 ie_srccpu;	/* CPU on srcnode generating error */
+    cnodeid_t               ie_srcnode;		/* Node which caused the error   */
+    cnodeid_t               ie_errnode;		/* Node where error was noticed  */
+    iopaddr_t               ie_sysioaddr;	/* Sys specific IO address       */
+    iopaddr_t               ie_xtalkaddr;	/* Xtalk (48bit) addr of Error   */
+    iopaddr_t               ie_busspace;	/* Bus specific address space    */
+    iopaddr_t               ie_busaddr;		/* Bus specific address          */
+    caddr_t                 ie_vaddr;	/* Virtual address of error      */
+    iopaddr_t               ie_memaddr;		/* Physical memory address       */
+    caddr_t		    ie_epc;		/* pc when error reported	 */
+    caddr_t		    ie_ef;		/* eframe when error reported	 */
+    short		    ie_tnum;		/* Xtalk TNUM field */
+} ioerror_t;
+
+#define	IOERROR_INIT(e)		do { (e)->ie_v.iev_a = 0; } while (0)
+#define	IOERROR_SETVALUE(e,f,v)	do { (e)->ie_ ## f = (v); (e)->ie_v.iev_b.ievb_ ## f = 1; } while (0)
+
+#endif /* _ASM_IA64_SN_IOERROR_H */
diff --git a/kernel/arch/ia64/sn/include/tio.h b/kernel/arch/ia64/sn/include/tio.h
new file mode 100644
index 000000000..6b2e7b75e
--- /dev/null
+++ b/kernel/arch/ia64/sn/include/tio.h
@@ -0,0 +1,41 @@
+/* 
+ * 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.
+ *
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef _ASM_IA64_SN_TIO_H
+#define _ASM_IA64_SN_TIO_H
+
+#define	TIO_MMR_ADDR_MOD
+
+#define TIO_NODE_ID     TIO_MMR_ADDR_MOD(0x0000000090060e80)
+
+#define TIO_ITTE_BASE   0xb0008800        /* base of translation table entries */
+#define TIO_ITTE(bigwin)        (TIO_ITTE_BASE + 8*(bigwin))
+
+#define TIO_ITTE_OFFSET_BITS    8       /* size of offset field */
+#define TIO_ITTE_OFFSET_MASK    ((1<<TIO_ITTE_OFFSET_BITS)-1)
+#define TIO_ITTE_OFFSET_SHIFT   0
+
+#define TIO_ITTE_WIDGET_BITS    2       /* size of widget field */
+#define TIO_ITTE_WIDGET_MASK    ((1<<TIO_ITTE_WIDGET_BITS)-1)
+#define TIO_ITTE_WIDGET_SHIFT   12
+#define TIO_ITTE_VALID_MASK	0x1
+#define TIO_ITTE_VALID_SHIFT	16
+
+#define TIO_ITTE_WIDGET(itte) \
+	(((itte) >> TIO_ITTE_WIDGET_SHIFT) & TIO_ITTE_WIDGET_MASK)
+#define TIO_ITTE_VALID(itte) \
+	(((itte) >> TIO_ITTE_VALID_SHIFT) & TIO_ITTE_VALID_MASK)
+
+#define TIO_ITTE_PUT(nasid, bigwin, widget, addr, valid) \
+        REMOTE_HUB_S((nasid), TIO_ITTE(bigwin), \
+                (((((addr) >> TIO_BWIN_SIZE_BITS) & \
+                   TIO_ITTE_OFFSET_MASK) << TIO_ITTE_OFFSET_SHIFT) | \
+                (((widget) & TIO_ITTE_WIDGET_MASK) << TIO_ITTE_WIDGET_SHIFT)) | \
+		(( (valid) & TIO_ITTE_VALID_MASK) << TIO_ITTE_VALID_SHIFT))
+
+#endif /*  _ASM_IA64_SN_TIO_H */
diff --git a/kernel/arch/ia64/sn/include/xtalk/hubdev.h b/kernel/arch/ia64/sn/include/xtalk/hubdev.h
new file mode 100644
index 000000000..8182583c7
--- /dev/null
+++ b/kernel/arch/ia64/sn/include/xtalk/hubdev.h
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ */
+#ifndef _ASM_IA64_SN_XTALK_HUBDEV_H
+#define _ASM_IA64_SN_XTALK_HUBDEV_H
+
+#include "xtalk/xwidgetdev.h"
+
+#define HUB_WIDGET_ID_MAX 0xf
+#define DEV_PER_WIDGET (2*2*8)
+#define IIO_ITTE_WIDGET_BITS    4       /* size of widget field */
+#define IIO_ITTE_WIDGET_MASK    ((1<<IIO_ITTE_WIDGET_BITS)-1)
+#define IIO_ITTE_WIDGET_SHIFT   8
+
+#define IIO_ITTE_WIDGET(itte)	\
+	(((itte) >> IIO_ITTE_WIDGET_SHIFT) & IIO_ITTE_WIDGET_MASK)
+
+/*
+ * Use the top big window as a surrogate for the first small window
+ */
+#define SWIN0_BIGWIN            HUB_NUM_BIG_WINDOW
+#define IIO_NUM_ITTES   7
+#define HUB_NUM_BIG_WINDOW      (IIO_NUM_ITTES - 1)
+
+/* This struct is shared between the PROM and the kernel.
+ * Changes to this struct will require corresponding changes to the kernel.
+ */
+struct sn_flush_device_common {
+	int sfdl_bus;
+	int sfdl_slot;
+	int sfdl_pin;
+	struct common_bar_list {
+		unsigned long start;
+		unsigned long end;
+	} sfdl_bar_list[6];
+	unsigned long sfdl_force_int_addr;
+	unsigned long sfdl_flush_value;
+	volatile unsigned long *sfdl_flush_addr;
+	u32 sfdl_persistent_busnum;
+	u32 sfdl_persistent_segment;
+	struct pcibus_info *sfdl_pcibus_info;
+};
+
+/* This struct is kernel only and is not used by the PROM */
+struct sn_flush_device_kernel {
+	spinlock_t sfdl_flush_lock;
+	struct sn_flush_device_common *common;
+};
+
+/* 01/16/06 This struct is the old PROM/kernel struct and needs to be included
+ * for older official PROMs to function on the new kernel base.  This struct
+ * will be removed when the next official PROM release occurs. */
+
+struct sn_flush_device_war {
+	struct sn_flush_device_common common;
+	u32 filler; /* older PROMs expect the default size of a spinlock_t */
+};
+
+/*
+ * **widget_p - Used as an array[wid_num][device] of sn_flush_device_kernel.
+ */
+struct sn_flush_nasid_entry  {
+	struct sn_flush_device_kernel **widget_p; // Used as an array of wid_num
+	u64 iio_itte[8];
+};
+
+struct hubdev_info {
+	geoid_t				hdi_geoid;
+	short				hdi_nasid;
+	short				hdi_peer_nasid;   /* Dual Porting Peer */
+
+	struct sn_flush_nasid_entry	hdi_flush_nasid_list;
+	struct xwidget_info		hdi_xwidget_info[HUB_WIDGET_ID_MAX + 1];
+
+
+	void				*hdi_nodepda;
+	void				*hdi_node_vertex;
+	u32				max_segment_number;
+	u32				max_pcibus_number;
+};
+
+extern void hubdev_init_node(nodepda_t *, cnodeid_t);
+extern void hub_error_init(struct hubdev_info *);
+extern void ice_error_init(struct hubdev_info *);
+
+
+#endif /* _ASM_IA64_SN_XTALK_HUBDEV_H */
diff --git a/kernel/arch/ia64/sn/include/xtalk/xbow.h b/kernel/arch/ia64/sn/include/xtalk/xbow.h
new file mode 100644
index 000000000..90f37a413
--- /dev/null
+++ b/kernel/arch/ia64/sn/include/xtalk/xbow.h
@@ -0,0 +1,301 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1992-1997,2000-2006 Silicon Graphics, Inc. All Rights
+ * Reserved.
+ */
+#ifndef _ASM_IA64_SN_XTALK_XBOW_H
+#define _ASM_IA64_SN_XTALK_XBOW_H
+
+#define XBOW_PORT_8	0x8
+#define XBOW_PORT_C	0xc
+#define XBOW_PORT_F	0xf
+
+#define MAX_XBOW_PORTS	8	/* number of ports on xbow chip */
+#define BASE_XBOW_PORT	XBOW_PORT_8	/* Lowest external port */
+
+#define	XBOW_CREDIT	4
+
+#define MAX_XBOW_NAME 	16
+
+/* Register set for each xbow link */
+typedef volatile struct xb_linkregs_s {
+/*
+ * we access these through synergy unswizzled space, so the address
+ * gets twiddled (i.e. references to 0x4 actually go to 0x0 and vv.)
+ * That's why we put the register first and filler second.
+ */
+	u32 link_ibf;
+	u32 filler0;	/* filler for proper alignment */
+	u32 link_control;
+	u32 filler1;
+	u32 link_status;
+	u32 filler2;
+	u32 link_arb_upper;
+	u32 filler3;
+	u32 link_arb_lower;
+	u32 filler4;
+	u32 link_status_clr;
+	u32 filler5;
+	u32 link_reset;
+	u32 filler6;
+	u32 link_aux_status;
+	u32 filler7;
+} xb_linkregs_t;
+
+typedef volatile struct xbow_s {
+	/* standard widget configuration 0x000000-0x000057 */
+	struct widget_cfg xb_widget;  /* 0x000000 */
+
+	/* helper fieldnames for accessing bridge widget */
+
+#define xb_wid_id 		xb_widget.w_id
+#define xb_wid_stat 		xb_widget.w_status
+#define xb_wid_err_upper 	xb_widget.w_err_upper_addr
+#define xb_wid_err_lower 	xb_widget.w_err_lower_addr
+#define xb_wid_control		xb_widget.w_control
+#define xb_wid_req_timeout 	xb_widget.w_req_timeout
+#define xb_wid_int_upper 	xb_widget.w_intdest_upper_addr
+#define xb_wid_int_lower 	xb_widget.w_intdest_lower_addr
+#define xb_wid_err_cmdword 	xb_widget.w_err_cmd_word
+#define xb_wid_llp 		xb_widget.w_llp_cfg
+#define xb_wid_stat_clr 	xb_widget.w_tflush
+
+/*
+ * we access these through synergy unswizzled space, so the address
+ * gets twiddled (i.e. references to 0x4 actually go to 0x0 and vv.)
+ * That's why we put the register first and filler second.
+ */
+	/* xbow-specific widget configuration    0x000058-0x0000FF */
+	u32 xb_wid_arb_reload; /* 0x00005C */
+	u32 _pad_000058;
+	u32 xb_perf_ctr_a;	/* 0x000064 */
+	u32 _pad_000060;
+	u32 xb_perf_ctr_b;	/* 0x00006c */
+	u32 _pad_000068;
+	u32 xb_nic;		/* 0x000074 */
+	u32 _pad_000070;
+
+	/* Xbridge only */
+	u32 xb_w0_rst_fnc;	/* 0x00007C */
+	u32 _pad_000078;
+	u32 xb_l8_rst_fnc;	/* 0x000084 */
+	u32 _pad_000080;
+	u32 xb_l9_rst_fnc;	/* 0x00008c */
+	u32 _pad_000088;
+	u32 xb_la_rst_fnc;	/* 0x000094 */
+	u32 _pad_000090;
+	u32 xb_lb_rst_fnc;	/* 0x00009c */
+	u32 _pad_000098;
+	u32 xb_lc_rst_fnc;	/* 0x0000a4 */
+	u32 _pad_0000a0;
+	u32 xb_ld_rst_fnc;	/* 0x0000ac */
+	u32 _pad_0000a8;
+	u32 xb_le_rst_fnc;	/* 0x0000b4 */
+	u32 _pad_0000b0;
+	u32 xb_lf_rst_fnc;	/* 0x0000bc */
+	u32 _pad_0000b8;
+	u32 xb_lock;		/* 0x0000c4 */
+	u32 _pad_0000c0;
+	u32 xb_lock_clr;	/* 0x0000cc */
+	u32 _pad_0000c8;
+	/* end of Xbridge only */
+	u32 _pad_0000d0[12];
+
+	/* Link Specific Registers, port 8..15   0x000100-0x000300 */
+	xb_linkregs_t xb_link_raw[MAX_XBOW_PORTS];
+} xbow_t;
+
+#define xb_link(p) xb_link_raw[(p) & (MAX_XBOW_PORTS - 1)]
+
+#define XB_FLAGS_EXISTS		0x1	/* device exists */
+#define XB_FLAGS_MASTER		0x2
+#define XB_FLAGS_SLAVE		0x0
+#define XB_FLAGS_GBR		0x4
+#define XB_FLAGS_16BIT		0x8
+#define XB_FLAGS_8BIT		0x0
+
+/* is widget port number valid?  (based on version 7.0 of xbow spec) */
+#define XBOW_WIDGET_IS_VALID(wid) ((wid) >= XBOW_PORT_8 && (wid) <= XBOW_PORT_F)
+
+/* whether to use upper or lower arbitration register, given source widget id */
+#define XBOW_ARB_IS_UPPER(wid) 	((wid) >= XBOW_PORT_8 && (wid) <= XBOW_PORT_B)
+#define XBOW_ARB_IS_LOWER(wid) 	((wid) >= XBOW_PORT_C && (wid) <= XBOW_PORT_F)
+
+/* offset of arbitration register, given source widget id */
+#define XBOW_ARB_OFF(wid) 	(XBOW_ARB_IS_UPPER(wid) ? 0x1c : 0x24)
+
+#define	XBOW_WID_ID		WIDGET_ID
+#define	XBOW_WID_STAT		WIDGET_STATUS
+#define	XBOW_WID_ERR_UPPER	WIDGET_ERR_UPPER_ADDR
+#define	XBOW_WID_ERR_LOWER	WIDGET_ERR_LOWER_ADDR
+#define	XBOW_WID_CONTROL	WIDGET_CONTROL
+#define	XBOW_WID_REQ_TO		WIDGET_REQ_TIMEOUT
+#define	XBOW_WID_INT_UPPER	WIDGET_INTDEST_UPPER_ADDR
+#define	XBOW_WID_INT_LOWER	WIDGET_INTDEST_LOWER_ADDR
+#define	XBOW_WID_ERR_CMDWORD	WIDGET_ERR_CMD_WORD
+#define	XBOW_WID_LLP		WIDGET_LLP_CFG
+#define	XBOW_WID_STAT_CLR	WIDGET_TFLUSH
+#define XBOW_WID_ARB_RELOAD 	0x5c
+#define XBOW_WID_PERF_CTR_A 	0x64
+#define XBOW_WID_PERF_CTR_B 	0x6c
+#define XBOW_WID_NIC 		0x74
+
+/* Xbridge only */
+#define XBOW_W0_RST_FNC		0x00007C
+#define	XBOW_L8_RST_FNC		0x000084
+#define	XBOW_L9_RST_FNC		0x00008c
+#define	XBOW_LA_RST_FNC		0x000094
+#define	XBOW_LB_RST_FNC		0x00009c
+#define	XBOW_LC_RST_FNC		0x0000a4
+#define	XBOW_LD_RST_FNC		0x0000ac
+#define	XBOW_LE_RST_FNC		0x0000b4
+#define	XBOW_LF_RST_FNC		0x0000bc
+#define XBOW_RESET_FENCE(x) ((x) > 7 && (x) < 16) ? \
+				(XBOW_W0_RST_FNC + ((x) - 7) * 8) : \
+				((x) == 0) ? XBOW_W0_RST_FNC : 0
+#define XBOW_LOCK		0x0000c4
+#define XBOW_LOCK_CLR		0x0000cc
+/* End of Xbridge only */
+
+/* used only in ide, but defined here within the reserved portion */
+/* of the widget0 address space (before 0xf4) */
+#define	XBOW_WID_UNDEF		0xe4
+
+/* xbow link register set base, legal value for x is 0x8..0xf */
+#define	XB_LINK_BASE		0x100
+#define	XB_LINK_OFFSET		0x40
+#define	XB_LINK_REG_BASE(x)	(XB_LINK_BASE + ((x) & (MAX_XBOW_PORTS - 1)) * XB_LINK_OFFSET)
+
+#define	XB_LINK_IBUF_FLUSH(x)	(XB_LINK_REG_BASE(x) + 0x4)
+#define	XB_LINK_CTRL(x)		(XB_LINK_REG_BASE(x) + 0xc)
+#define	XB_LINK_STATUS(x)	(XB_LINK_REG_BASE(x) + 0x14)
+#define	XB_LINK_ARB_UPPER(x)	(XB_LINK_REG_BASE(x) + 0x1c)
+#define	XB_LINK_ARB_LOWER(x)	(XB_LINK_REG_BASE(x) + 0x24)
+#define	XB_LINK_STATUS_CLR(x)	(XB_LINK_REG_BASE(x) + 0x2c)
+#define	XB_LINK_RESET(x)	(XB_LINK_REG_BASE(x) + 0x34)
+#define	XB_LINK_AUX_STATUS(x)	(XB_LINK_REG_BASE(x) + 0x3c)
+
+/* link_control(x) */
+#define	XB_CTRL_LINKALIVE_IE		0x80000000	/* link comes alive */
+/* reserved:			0x40000000 */
+#define	XB_CTRL_PERF_CTR_MODE_MSK	0x30000000	/* perf counter mode */
+#define	XB_CTRL_IBUF_LEVEL_MSK		0x0e000000	/* input packet buffer
+							   level */
+#define	XB_CTRL_8BIT_MODE		0x01000000	/* force link into 8
+							   bit mode */
+#define XB_CTRL_BAD_LLP_PKT		0x00800000	/* force bad LLP
+							   packet */
+#define XB_CTRL_WIDGET_CR_MSK		0x007c0000	/* LLP widget credit
+							   mask */
+#define XB_CTRL_WIDGET_CR_SHFT	18			/* LLP widget credit
+							   shift */
+#define XB_CTRL_ILLEGAL_DST_IE		0x00020000	/* illegal destination
+							 */
+#define XB_CTRL_OALLOC_IBUF_IE		0x00010000	/* overallocated input
+							   buffer */
+/* reserved:			0x0000fe00 */
+#define XB_CTRL_BNDWDTH_ALLOC_IE	0x00000100	/* bandwidth alloc */
+#define XB_CTRL_RCV_CNT_OFLOW_IE	0x00000080	/* rcv retry overflow */
+#define XB_CTRL_XMT_CNT_OFLOW_IE	0x00000040	/* xmt retry overflow */
+#define XB_CTRL_XMT_MAX_RTRY_IE		0x00000020	/* max transmit retry */
+#define XB_CTRL_RCV_IE			0x00000010	/* receive */
+#define XB_CTRL_XMT_RTRY_IE		0x00000008	/* transmit retry */
+/* reserved:			0x00000004 */
+#define	XB_CTRL_MAXREQ_TOUT_IE		0x00000002	/* maximum request
+							   timeout */
+#define	XB_CTRL_SRC_TOUT_IE		0x00000001	/* source timeout */
+
+/* link_status(x) */
+#define	XB_STAT_LINKALIVE		XB_CTRL_LINKALIVE_IE
+/* reserved:			0x7ff80000 */
+#define	XB_STAT_MULTI_ERR		0x00040000	/* multi error */
+#define	XB_STAT_ILLEGAL_DST_ERR		XB_CTRL_ILLEGAL_DST_IE
+#define	XB_STAT_OALLOC_IBUF_ERR		XB_CTRL_OALLOC_IBUF_IE
+#define	XB_STAT_BNDWDTH_ALLOC_ID_MSK	0x0000ff00	/* port bitmask */
+#define	XB_STAT_RCV_CNT_OFLOW_ERR	XB_CTRL_RCV_CNT_OFLOW_IE
+#define	XB_STAT_XMT_CNT_OFLOW_ERR	XB_CTRL_XMT_CNT_OFLOW_IE
+#define	XB_STAT_XMT_MAX_RTRY_ERR	XB_CTRL_XMT_MAX_RTRY_IE
+#define	XB_STAT_RCV_ERR			XB_CTRL_RCV_IE
+#define	XB_STAT_XMT_RTRY_ERR		XB_CTRL_XMT_RTRY_IE
+/* reserved:			0x00000004 */
+#define	XB_STAT_MAXREQ_TOUT_ERR		XB_CTRL_MAXREQ_TOUT_IE
+#define	XB_STAT_SRC_TOUT_ERR		XB_CTRL_SRC_TOUT_IE
+
+/* link_aux_status(x) */
+#define	XB_AUX_STAT_RCV_CNT	0xff000000
+#define	XB_AUX_STAT_XMT_CNT	0x00ff0000
+#define	XB_AUX_STAT_TOUT_DST	0x0000ff00
+#define	XB_AUX_LINKFAIL_RST_BAD	0x00000040
+#define	XB_AUX_STAT_PRESENT	0x00000020
+#define	XB_AUX_STAT_PORT_WIDTH	0x00000010
+/*	reserved:		0x0000000f */
+
+/*
+ * link_arb_upper/link_arb_lower(x), (reg) should be the link_arb_upper
+ * register if (x) is 0x8..0xb, link_arb_lower if (x) is 0xc..0xf
+ */
+#define	XB_ARB_GBR_MSK		0x1f
+#define	XB_ARB_RR_MSK		0x7
+#define	XB_ARB_GBR_SHFT(x)	(((x) & 0x3) * 8)
+#define	XB_ARB_RR_SHFT(x)	(((x) & 0x3) * 8 + 5)
+#define	XB_ARB_GBR_CNT(reg,x)	((reg) >> XB_ARB_GBR_SHFT(x) & XB_ARB_GBR_MSK)
+#define	XB_ARB_RR_CNT(reg,x)	((reg) >> XB_ARB_RR_SHFT(x) & XB_ARB_RR_MSK)
+
+/* XBOW_WID_STAT */
+#define	XB_WID_STAT_LINK_INTR_SHFT	(24)
+#define	XB_WID_STAT_LINK_INTR_MASK	(0xFF << XB_WID_STAT_LINK_INTR_SHFT)
+#define	XB_WID_STAT_LINK_INTR(x) \
+	(0x1 << (((x)&7) + XB_WID_STAT_LINK_INTR_SHFT))
+#define	XB_WID_STAT_WIDGET0_INTR	0x00800000
+#define XB_WID_STAT_SRCID_MASK		0x000003c0	/* Xbridge only */
+#define	XB_WID_STAT_REG_ACC_ERR		0x00000020
+#define XB_WID_STAT_RECV_TOUT		0x00000010	/* Xbridge only */
+#define XB_WID_STAT_ARB_TOUT		0x00000008	/* Xbridge only */
+#define	XB_WID_STAT_XTALK_ERR		0x00000004
+#define XB_WID_STAT_DST_TOUT		0x00000002	/* Xbridge only */
+#define	XB_WID_STAT_MULTI_ERR		0x00000001
+
+#define XB_WID_STAT_SRCID_SHFT		6
+
+/* XBOW_WID_CONTROL */
+#define XB_WID_CTRL_REG_ACC_IE		XB_WID_STAT_REG_ACC_ERR
+#define XB_WID_CTRL_RECV_TOUT		XB_WID_STAT_RECV_TOUT
+#define XB_WID_CTRL_ARB_TOUT		XB_WID_STAT_ARB_TOUT
+#define XB_WID_CTRL_XTALK_IE		XB_WID_STAT_XTALK_ERR
+
+/* XBOW_WID_INT_UPPER */
+/* defined in xwidget.h for WIDGET_INTDEST_UPPER_ADDR */
+
+/* XBOW WIDGET part number, in the ID register */
+#define XBOW_WIDGET_PART_NUM	0x0		/* crossbow */
+#define XXBOW_WIDGET_PART_NUM	0xd000		/* Xbridge */
+#define	XBOW_WIDGET_MFGR_NUM	0x0
+#define	XXBOW_WIDGET_MFGR_NUM	0x0
+#define PXBOW_WIDGET_PART_NUM   0xd100		/* PIC */
+
+#define	XBOW_REV_1_0		0x1	/* xbow rev 1.0 is "1" */
+#define	XBOW_REV_1_1		0x2	/* xbow rev 1.1 is "2" */
+#define XBOW_REV_1_2		0x3	/* xbow rev 1.2 is "3" */
+#define XBOW_REV_1_3		0x4	/* xbow rev 1.3 is "4" */
+#define XBOW_REV_2_0		0x5	/* xbow rev 2.0 is "5" */
+
+#define XXBOW_PART_REV_1_0		(XXBOW_WIDGET_PART_NUM << 4 | 0x1 )
+#define XXBOW_PART_REV_2_0		(XXBOW_WIDGET_PART_NUM << 4 | 0x2 )
+
+/* XBOW_WID_ARB_RELOAD */
+#define	XBOW_WID_ARB_RELOAD_INT	0x3f	/* GBR reload interval */
+
+#define IS_XBRIDGE_XBOW(wid) \
+	(XWIDGET_PART_NUM(wid) == XXBOW_WIDGET_PART_NUM && \
+	XWIDGET_MFG_NUM(wid) == XXBOW_WIDGET_MFGR_NUM)
+
+#define IS_PIC_XBOW(wid) \
+	(XWIDGET_PART_NUM(wid) == PXBOW_WIDGET_PART_NUM && \
+	XWIDGET_MFG_NUM(wid) == XXBOW_WIDGET_MFGR_NUM)
+
+#define XBOW_WAR_ENABLED(pv, widid) ((1 << XWIDGET_REV_NUM(widid)) & pv)
+
+#endif /* _ASM_IA64_SN_XTALK_XBOW_H */
diff --git a/kernel/arch/ia64/sn/include/xtalk/xwidgetdev.h b/kernel/arch/ia64/sn/include/xtalk/xwidgetdev.h
new file mode 100644
index 000000000..2800eda0f
--- /dev/null
+++ b/kernel/arch/ia64/sn/include/xtalk/xwidgetdev.h
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1992-1997,2000-2003 Silicon Graphics, Inc. All Rights Reserved.
+ */
+#ifndef _ASM_IA64_SN_XTALK_XWIDGET_H
+#define _ASM_IA64_SN_XTALK_XWIDGET_H
+
+/* WIDGET_ID */
+#define WIDGET_REV_NUM                  0xf0000000
+#define WIDGET_PART_NUM                 0x0ffff000
+#define WIDGET_MFG_NUM                  0x00000ffe
+#define WIDGET_REV_NUM_SHFT             28
+#define WIDGET_PART_NUM_SHFT            12
+#define WIDGET_MFG_NUM_SHFT             1
+
+#define XWIDGET_PART_NUM(widgetid) (((widgetid) & WIDGET_PART_NUM) >> WIDGET_PART_NUM_SHFT)
+#define XWIDGET_REV_NUM(widgetid) (((widgetid) & WIDGET_REV_NUM) >> WIDGET_REV_NUM_SHFT)
+#define XWIDGET_MFG_NUM(widgetid) (((widgetid) & WIDGET_MFG_NUM) >> WIDGET_MFG_NUM_SHFT)
+#define XWIDGET_PART_REV_NUM(widgetid) ((XWIDGET_PART_NUM(widgetid) << 4) | \
+                                        XWIDGET_REV_NUM(widgetid))
+#define XWIDGET_PART_REV_NUM_REV(partrev) (partrev & 0xf)
+
+/* widget configuration registers */
+struct widget_cfg{
+	u32	w_id;	/* 0x04 */
+	u32	w_pad_0;	/* 0x00 */
+	u32	w_status;	/* 0x0c */
+	u32	w_pad_1;	/* 0x08 */
+	u32	w_err_upper_addr;	/* 0x14 */
+	u32	w_pad_2;	/* 0x10 */
+	u32	w_err_lower_addr;	/* 0x1c */
+	u32	w_pad_3;	/* 0x18 */
+	u32	w_control;	/* 0x24 */
+	u32	w_pad_4;	/* 0x20 */
+	u32	w_req_timeout;	/* 0x2c */
+	u32	w_pad_5;	/* 0x28 */
+	u32	w_intdest_upper_addr;	/* 0x34 */
+	u32	w_pad_6;	/* 0x30 */
+	u32	w_intdest_lower_addr;	/* 0x3c */
+	u32	w_pad_7;	/* 0x38 */
+	u32	w_err_cmd_word;	/* 0x44 */
+	u32	w_pad_8;	/* 0x40 */
+	u32	w_llp_cfg;	/* 0x4c */
+	u32	w_pad_9;	/* 0x48 */
+	u32	w_tflush;	/* 0x54 */
+	u32	w_pad_10;	/* 0x50 */
+};
+
+/*
+ * Crosstalk Widget Hardware Identification, as defined in the Crosstalk spec.
+ */
+struct xwidget_hwid{
+	int		mfg_num;
+	int		rev_num;
+	int		part_num;
+};
+
+struct xwidget_info{
+
+	struct xwidget_hwid	xwi_hwid;	/* Widget Identification */
+	char			xwi_masterxid;	/* Hub's Widget Port Number */
+	void			*xwi_hubinfo;     /* Hub's provider private info */
+	u64			*xwi_hub_provider; /* prom provider functions */
+	void			*xwi_vertex;
+};
+
+#endif                          /* _ASM_IA64_SN_XTALK_XWIDGET_H */