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 #include <linux/config.h>
  13
  14 /*
  15  * R5000 has an interesting "restriction":  ll(d)/sc(d)
  16  * instructions to XKPHYS region simply do uncached bus
  17  * requests. This breaks all the atomic bitops functions.
  18  * so, for 64bit IP32 kernel we just don't use ll/sc.
  19  * This does not affect luserland.
  20  */
  21 #if defined(CONFIG_CPU_R5000) && defined(CONFIG_MIPS64)
  22 #define cpu_has_llsc            0
  23 #else
  24 #define cpu_has_llsc            1
  25 #endif
  26
  27 /* Settings which are common for all ip32 CPUs */
  28 #define cpu_has_tlb             1
  29 #define cpu_has_4kex            1
  30 #define cpu_has_fpu             1
  31 #define cpu_has_32fpr           1
  32 #define cpu_has_counter         1
  33 #define cpu_has_mips16          0
  34 #define cpu_has_vce             0
  35 #define cpu_has_cache_cdex_s    0
  36 #define cpu_has_mcheck          0
  37 #define cpu_has_ejtag           0
  38 #define cpu_has_vtag_icache     0
  39 #define cpu_has_ic_fills_f_dc   0
  40
  41 #endif /* __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H */