arch/tile/include/asm/hardwall.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  *
  14  * Provide methods for the HARDWALL_FILE for accessing the UDN.
  15  */
  16
  17 #ifndef _ASM_TILE_HARDWALL_H
  18 #define _ASM_TILE_HARDWALL_H
  19
  20 #include <linux/ioctl.h>
  21
  22 #define HARDWALL_IOCTL_BASE 0xa2
  23
  24 /*
  25  * The HARDWALL_CREATE() ioctl is a macro with a "size" argument.
  26  * The resulting ioctl value is passed to the kernel in conjunction
  27  * with a pointer to a little-endian bitmask of cpus, which must be
  28  * physically in a rectangular configuration on the chip.
  29  * The "size" is the number of bytes of cpu mask data.
  30  */
  31 #define _HARDWALL_CREATE 1
  32 #define HARDWALL_CREATE(size) \
  33   _IOC(_IOC_READ, HARDWALL_IOCTL_BASE, _HARDWALL_CREATE, (size))
  34
  35 #define _HARDWALL_ACTIVATE 2
  36 #define HARDWALL_ACTIVATE \
  37   _IO(HARDWALL_IOCTL_BASE, _HARDWALL_ACTIVATE)
  38
  39 #define _HARDWALL_DEACTIVATE 3
  40 #define HARDWALL_DEACTIVATE \
  41  _IO(HARDWALL_IOCTL_BASE, _HARDWALL_DEACTIVATE)
  42
  43 #define _HARDWALL_GET_ID 4
  44 #define HARDWALL_GET_ID \
  45  _IO(HARDWALL_IOCTL_BASE, _HARDWALL_GET_ID)
  46
  47 #ifndef __KERNEL__
  48
  49 /* This is the canonical name expected by userspace. */
  50 #define HARDWALL_FILE "/dev/hardwall"
  51
  52 #else
  53
  54 /* /proc hooks for hardwall. */
  55 struct proc_dir_entry;
  56 #ifdef CONFIG_HARDWALL
  57 void proc_tile_hardwall_init(struct proc_dir_entry *root);
  58 int proc_pid_hardwall(struct task_struct *task, char *buffer);
  59 #else
  60 static inline void proc_tile_hardwall_init(struct proc_dir_entry *root) {}
  61 #endif
  62
  63 #endif
  64
  65 #endif /* _ASM_TILE_HARDWALL_H */