98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
|
|
* Copyright (C) 2017 SiFive
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/cacheinfo.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
|
|
static void ci_leaf_init(struct cacheinfo *this_leaf,
|
|
struct device_node *node,
|
|
enum cache_type type, unsigned int level)
|
|
{
|
|
this_leaf->level = level;
|
|
this_leaf->type = type;
|
|
}
|
|
|
|
static int __init_cache_level(unsigned int cpu)
|
|
{
|
|
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
|
struct device_node *np = of_cpu_device_node_get(cpu);
|
|
int levels = 0, leaves = 0, level;
|
|
|
|
if (of_property_read_bool(np, "cache-size"))
|
|
++leaves;
|
|
if (of_property_read_bool(np, "i-cache-size"))
|
|
++leaves;
|
|
if (of_property_read_bool(np, "d-cache-size"))
|
|
++leaves;
|
|
if (leaves > 0)
|
|
levels = 1;
|
|
|
|
while ((np = of_find_next_cache_node(np))) {
|
|
if (!of_device_is_compatible(np, "cache"))
|
|
break;
|
|
if (of_property_read_u32(np, "cache-level", &level))
|
|
break;
|
|
if (level <= levels)
|
|
break;
|
|
if (of_property_read_bool(np, "cache-size"))
|
|
++leaves;
|
|
if (of_property_read_bool(np, "i-cache-size"))
|
|
++leaves;
|
|
if (of_property_read_bool(np, "d-cache-size"))
|
|
++leaves;
|
|
levels = level;
|
|
}
|
|
|
|
this_cpu_ci->num_levels = levels;
|
|
this_cpu_ci->num_leaves = leaves;
|
|
return 0;
|
|
}
|
|
|
|
static int __populate_cache_leaves(unsigned int cpu)
|
|
{
|
|
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
|
struct cacheinfo *this_leaf = this_cpu_ci->info_list;
|
|
struct device_node *np = of_cpu_device_node_get(cpu);
|
|
int levels = 1, level = 1;
|
|
|
|
if (of_property_read_bool(np, "cache-size"))
|
|
ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
|
|
if (of_property_read_bool(np, "i-cache-size"))
|
|
ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
|
|
if (of_property_read_bool(np, "d-cache-size"))
|
|
ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
|
|
|
|
while ((np = of_find_next_cache_node(np))) {
|
|
if (!of_device_is_compatible(np, "cache"))
|
|
break;
|
|
if (of_property_read_u32(np, "cache-level", &level))
|
|
break;
|
|
if (level <= levels)
|
|
break;
|
|
if (of_property_read_bool(np, "cache-size"))
|
|
ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
|
|
if (of_property_read_bool(np, "i-cache-size"))
|
|
ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
|
|
if (of_property_read_bool(np, "d-cache-size"))
|
|
ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
|
|
levels = level;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
|
|
DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)
|