arch/nds32/kernel/cacheinfo.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4 #include <linux/bitops.h>
   5 #include <linux/cacheinfo.h>
   6 #include <linux/cpu.h>
   7
   8 static void ci_leaf_init(struct cacheinfo *this_leaf,
   9                          enum cache_type type, unsigned int level)
  10 {
  11         char cache_type = (type & CACHE_TYPE_INST ? ICACHE : DCACHE);
  12
  13         this_leaf->level = level;
  14         this_leaf->type = type;
  15         this_leaf->coherency_line_size = CACHE_LINE_SIZE(cache_type);
  16         this_leaf->number_of_sets = CACHE_SET(cache_type);
  17         this_leaf->ways_of_associativity = CACHE_WAY(cache_type);
  18         this_leaf->size = this_leaf->number_of_sets *
  19             this_leaf->coherency_line_size * this_leaf->ways_of_associativity;
  20 #if defined(CONFIG_CPU_DCACHE_WRITETHROUGH)
  21         this_leaf->attributes = CACHE_WRITE_THROUGH;
  22 #else
  23         this_leaf->attributes = CACHE_WRITE_BACK;
  24 #endif
  25 }
  26
  27 int init_cache_level(unsigned int cpu)
  28 {
  29         struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
  30
  31         /* Only 1 level and I/D cache seperate. */
  32         this_cpu_ci->num_levels = 1;
  33         this_cpu_ci->num_leaves = 2;
  34         return 0;
  35 }
  36
  37 int populate_cache_leaves(unsigned int cpu)
  38 {
  39         unsigned int level, idx;
  40         struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
  41         struct cacheinfo *this_leaf = this_cpu_ci->info_list;
  42
  43         for (idx = 0, level = 1; level <= this_cpu_ci->num_levels &&
  44              idx < this_cpu_ci->num_leaves; idx++, level++) {
  45                 ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level);
  46                 ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level);
  47         }
  48         return 0;
  49 }