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Linux/arch/nds32/kernel/cacheinfo.c

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  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 }
 50 

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