include/asm-arm/domain.h

   1 /*
   2  *  linux/include/asm-arm/domain.h
   3  *
   4  *  Copyright (C) 1999 Russell King.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef __ASM_PROC_DOMAIN_H
  11 #define __ASM_PROC_DOMAIN_H
  12
  13 /*
  14  * Domain numbers
  15  *
  16  *  DOMAIN_IO     - domain 2 includes all IO only
  17  *  DOMAIN_USER   - domain 1 includes all user memory only
  18  *  DOMAIN_KERNEL - domain 0 includes all kernel memory only
  19  */
  20 #define DOMAIN_KERNEL   0
  21 #define DOMAIN_TABLE    0
  22 #define DOMAIN_USER     1
  23 #define DOMAIN_IO       2
  24
  25 /*
  26  * Domain types
  27  */
  28 #define DOMAIN_NOACCESS 0
  29 #define DOMAIN_CLIENT   1
  30 #define DOMAIN_MANAGER  3
  31
  32 #define domain_val(dom,type)    ((type) << (2*(dom)))
  33
  34 #ifndef __ASSEMBLY__
  35 #define set_domain(x)                                   \
  36         do {                                            \
  37         __asm__ __volatile__(                           \
  38         "mcr    p15, 0, %0, c3, c0      @ set domain"   \
  39           : : "r" (x));                                 \
  40         } while (0)
  41
  42 #define modify_domain(dom,type)                                 \
  43         do {                                                    \
  44         struct thread_info *thread = current_thread_info();     \
  45         unsigned int domain = thread->cpu_domain;               \
  46         domain &= ~domain_val(dom, DOMAIN_MANAGER);             \
  47         thread->cpu_domain = domain | domain_val(dom, type);    \
  48         set_domain(thread->cpu_domain);                         \
  49         } while (0)
  50
  51 #endif
  52 #endif /* !__ASSEMBLY__ */