arch/tile/include/asm/sections.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
  15 #ifndef _ASM_TILE_SECTIONS_H
  16 #define _ASM_TILE_SECTIONS_H
  17
  18 #define arch_is_kernel_data arch_is_kernel_data
  19
  20 #include <asm-generic/sections.h>
  21
  22 /* Text and data are at different areas in the kernel VA space. */
  23 extern char _sinitdata[], _einitdata[];
  24
  25 /* Write-once data is writable only till the end of initialization. */
  26 extern char __w1data_begin[], __w1data_end[];
  27
  28
  29 /* Not exactly sections, but PC comparison points in the code. */
  30 extern char __rt_sigreturn[], __rt_sigreturn_end[];
  31 #ifndef __tilegx__
  32 extern char sys_cmpxchg[], __sys_cmpxchg_end[];
  33 extern char __sys_cmpxchg_grab_lock[];
  34 extern char __start_atomic_asm_code[], __end_atomic_asm_code[];
  35 #endif
  36
  37 /* Handle the discontiguity between _sdata and _stext. */
  38 static inline int arch_is_kernel_data(unsigned long addr)
  39 {
  40         return addr >= (unsigned long)_sdata &&
  41                 addr < (unsigned long)_end;
  42 }
  43
  44 #endif /* _ASM_TILE_SECTIONS_H */