arch/mips/include/asm/mach-cavium-octeon/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) 2004 Cavium Networks
   7  */
   8 #ifndef __ASM_MACH_CAVIUM_OCTEON_CPU_FEATURE_OVERRIDES_H
   9 #define __ASM_MACH_CAVIUM_OCTEON_CPU_FEATURE_OVERRIDES_H
  10
  11 #include <linux/types.h>
  12 #include <asm/mipsregs.h>
  13
  14 /*
  15  * Cavium Octeons are MIPS64v2 processors
  16  */
  17 #define cpu_dcache_line_size()  128
  18 #define cpu_icache_line_size()  128
  19
  20
  21 #define cpu_has_4kex            1
  22 #define cpu_has_3k_cache        0
  23 #define cpu_has_4k_cache        0
  24 #define cpu_has_tx39_cache      0
  25 #define cpu_has_counter         1
  26 #define cpu_has_watch           1
  27 #define cpu_has_divec           1
  28 #define cpu_has_vce             0
  29 #define cpu_has_cache_cdex_p    0
  30 #define cpu_has_cache_cdex_s    0
  31 #define cpu_has_prefetch        1
  32
  33 #define cpu_has_llsc            1
  34 /*
  35  * We Disable LL/SC on non SMP systems as it is faster to disable
  36  * interrupts for atomic access than a LL/SC.
  37  */
  38 #ifdef CONFIG_SMP
  39 # define kernel_uses_llsc       1
  40 #else
  41 # define kernel_uses_llsc       0
  42 #endif
  43 #define cpu_has_vtag_icache     1
  44 #define cpu_has_dc_aliases      0
  45 #define cpu_has_ic_fills_f_dc   0
  46 #define cpu_has_64bits          1
  47 #define cpu_has_octeon_cache    1
  48 #define cpu_has_mips32r1        1
  49 #define cpu_has_mips32r2        1
  50 #define cpu_has_mips64r1        1
  51 #define cpu_has_mips64r2        1
  52 #define cpu_has_dsp             0
  53 #define cpu_has_dsp2            0
  54 #define cpu_has_mipsmt          0
  55 #define cpu_has_vint            0
  56 #define cpu_has_veic            0
  57 #define cpu_hwrena_impl_bits    (MIPS_HWRENA_IMPL1 | MIPS_HWRENA_IMPL2)
  58 #define cpu_has_wsbh            1
  59
  60 #define cpu_has_rixi            (cpu_data[0].cputype != CPU_CAVIUM_OCTEON)
  61
  62 #define ARCH_HAS_SPINLOCK_PREFETCH 1
  63 #define spin_lock_prefetch(x) prefetch(x)
  64 #define PREFETCH_STRIDE 128
  65
  66 #ifdef __OCTEON__
  67 /*
  68  * All gcc versions that have OCTEON support define __OCTEON__ and have the
  69  *  __builtin_popcount support.
  70  */
  71 #define ARCH_HAS_USABLE_BUILTIN_POPCOUNT 1
  72 #endif
  73
  74 /*
  75  * The last 256MB are reserved for device to device mappings and the
  76  * BAR1 hole.
  77  */
  78 #define MAX_DMA32_PFN (((1ULL << 32) - (1ULL << 28)) >> PAGE_SHIFT)
  79
  80 #endif