linux-imx

/*

 * 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) 2004-2009 Silicon Graphics, Inc.  All Rights Reserved.

 */

​

/*

 * Cross Partition Communication (XPC) structures and macros.

 */

​

#ifndef _DRIVERS_MISC_SGIXP_XPC_H

#define _DRIVERS_MISC_SGIXP_XPC_H

​

#include <linux/wait.h>

#include <linux/completion.h>

#include <linux/timer.h>

#include <linux/sched.h>

#include "xp.h"

​

/*

 * XPC Version numbers consist of a major and minor number. XPC can always

 * talk to versions with same major #, and never talk to versions with a

 * different major #.

 */

#define _XPC_VERSION(_maj, _min)    (((_maj) << 4) | ((_min) & 0xf))

#define XPC_VERSION_MAJOR(_v)       ((_v) >> 4)

#define XPC_VERSION_MINOR(_v)       ((_v) & 0xf)

​

/* define frequency of the heartbeat and frequency how often it's checked */

#define XPC_HB_DEFAULT_INTERVAL     5   /* incr HB every x secs */

#define XPC_HB_CHECK_DEFAULT_INTERVAL   20  /* check HB every x secs */

​

/* define the process name of HB checker and the CPU it is pinned to */

#define XPC_HB_CHECK_THREAD_NAME    "xpc_hb"

#define XPC_HB_CHECK_CPU        0

​

/* define the process name of the discovery thread */

#define XPC_DISCOVERY_THREAD_NAME   "xpc_discovery"

​

/*

 * the reserved page

 *

 *   SAL reserves one page of memory per partition for XPC. Though a full page

 *   in length (16384 bytes), its starting address is not page aligned, but it

 *   is cacheline aligned. The reserved page consists of the following:

 *

 *   reserved page header

 *

 *     The first two 64-byte cachelines of the reserved page contain the

 *     header (struct xpc_rsvd_page). Before SAL initialization has completed,

 *     SAL has set up the following fields of the reserved page header:

 *     SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The

 *     other fields are set up by XPC. (xpc_rsvd_page points to the local

 *     partition's reserved page.)

 *

 *   part_nasids mask

 *   mach_nasids mask

 *

 *     SAL also sets up two bitmaps (or masks), one that reflects the actual

 *     nasids in this partition (part_nasids), and the other that reflects

 *     the actual nasids in the entire machine (mach_nasids). We're only