release/src-rt-6.x/linux/linux-2.6/include/asm-mips/mach-ip32/cpu-feature-overrides.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2005 Ilya A. Volynets-Evenbakh
   7  * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
   8  */
   9 #ifndef __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H
  10 #define __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H
  11
  12
  13 /*
  14  * R5000 has an interesting "restriction":  ll(d)/sc(d)
  15  * instructions to XKPHYS region simply do uncached bus
  16  * requests. This breaks all the atomic bitops functions.
  17  * so, for 64bit IP32 kernel we just don't use ll/sc.
  18  * This does not affect luserland.
  19  */
  20 #if (defined(CONFIG_CPU_R5000) || defined(CONFIG_CPU_NEVADA)) && defined(CONFIG_64BIT)
  21 #define cpu_has_llsc            0
  22 #else
  23 #define cpu_has_llsc            1
  24 #endif
  25
  26 /* Settings which are common for all ip32 CPUs */
  27 #define cpu_has_tlb             1
  28 #define cpu_has_4kex            1
  29 #define cpu_has_fpu             1
  30 #define cpu_has_32fpr           1
  31 #define cpu_has_counter         1
  32 #define cpu_has_mips16          0
  33 #define cpu_has_vce             0
  34 #define cpu_has_cache_cdex_s    0
  35 #define cpu_has_mcheck          0
  36 #define cpu_has_ejtag           0
  37 #define cpu_has_vtag_icache     0
  38 #define cpu_has_ic_fills_f_dc   0
  39 #define cpu_has_dsp             0
  40 #define cpu_has_4k_cache        1
  41
  42
  43 #define cpu_has_mips32r1        0
  44 #define cpu_has_mips32r2        0
  45 #define cpu_has_mips64r1        0
  46 #define cpu_has_mips64r2        0
  47
  48 #endif /* __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H */