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/*
* Copyright (c) 2013-2014 Richard Braun.
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stddef.h>
#include <kern/bitmap.h>
#include <kern/cpumap.h>
#include <kern/init.h>
#include <kern/kmem.h>
#include <kern/macros.h>
#include <machine/cpu.h>
static struct cpumap cpumap_active_cpus __read_mostly = { { 1 } };
static struct kmem_cache cpumap_cache;
static int __init
cpumap_setup(void)
{
unsigned int i, nr_cpus;
kmem_cache_init(&cpumap_cache, "cpumap", sizeof(struct cpumap), 0, NULL, 0);
cpumap_zero(&cpumap_active_cpus);
nr_cpus = cpu_count();
for (i = 0; i < nr_cpus; i++) {
cpumap_set(&cpumap_active_cpus, i);
}
return 0;
}
INIT_OP_DEFINE(cpumap_setup,
INIT_OP_DEP(kmem_setup, true),
INIT_OP_DEP(cpu_mp_probe, true));
const struct cpumap *
cpumap_all(void)
{
return &cpumap_active_cpus;
}
int
cpumap_create(struct cpumap **cpumapp)
{
struct cpumap *cpumap;
cpumap = kmem_cache_alloc(&cpumap_cache);
if (cpumap == NULL) {
return ENOMEM;
}
*cpumapp = cpumap;
return 0;
}
void
cpumap_destroy(struct cpumap *cpumap)
{
kmem_cache_free(&cpumap_cache, cpumap);
}
int
cpumap_check(const struct cpumap *cpumap)
{
int index;
index = bitmap_find_first(cpumap->cpus, cpu_count());
if (index == -1) {
return EINVAL;
}
return 0;
}
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