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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/>.
*
*
* Processors represented as bit maps.
*
* This module acts as a convenient frontend for the bitmap and kmem modules.
* Since the size of a CPU map varies with the maximum number of processors
* that can be managed by the system, maps must not be allocated from the
* stack.
*/
#ifndef KERN_CPUMAP_H
#define KERN_CPUMAP_H
#include <kern/bitmap.h>
#include <kern/init.h>
struct cpumap {
BITMAP_DECLARE(cpus, CONFIG_MAX_CPUS);
};
static inline void
cpumap_zero(struct cpumap *cpumap)
{
bitmap_zero(cpumap->cpus, CONFIG_MAX_CPUS);
}
static inline void
cpumap_fill(struct cpumap *cpumap)
{
bitmap_fill(cpumap->cpus, CONFIG_MAX_CPUS);
}
static inline void
cpumap_copy(struct cpumap *dest, const struct cpumap *src)
{
bitmap_copy(dest->cpus, src->cpus, CONFIG_MAX_CPUS);
}
static inline int
cpumap_cmp(const struct cpumap *a, const struct cpumap *b)
{
return bitmap_cmp(a->cpus, b->cpus, CONFIG_MAX_CPUS);
}
static inline void
cpumap_set(struct cpumap *cpumap, int index)
{
bitmap_set(cpumap->cpus, index);
}
static inline void
cpumap_set_atomic(struct cpumap *cpumap, int index)
{
bitmap_set_atomic(cpumap->cpus, index);
}
static inline void
cpumap_clear(struct cpumap *cpumap, int index)
{
bitmap_clear(cpumap->cpus, index);
}
static inline void
cpumap_clear_atomic(struct cpumap *cpumap, int index)
{
bitmap_clear_atomic(cpumap->cpus, index);
}
static inline int
cpumap_test(const struct cpumap *cpumap, int index)
{
return bitmap_test(cpumap->cpus, index);
}
static inline void
cpumap_and(struct cpumap *a, const struct cpumap *b)
{
bitmap_and(a->cpus, b->cpus, CONFIG_MAX_CPUS);
}
static inline void
cpumap_or(struct cpumap *a, const struct cpumap *b)
{
bitmap_or(a->cpus, b->cpus, CONFIG_MAX_CPUS);
}
static inline void
cpumap_xor(struct cpumap *a, const struct cpumap *b)
{
bitmap_xor(a->cpus, b->cpus, CONFIG_MAX_CPUS);
}
static inline int
cpumap_find_next(const struct cpumap *cpumap, int index)
{
return bitmap_find_next(cpumap->cpus, CONFIG_MAX_CPUS, index);
}
static inline int
cpumap_find_first(const struct cpumap *cpumap)
{
return bitmap_find_first(cpumap->cpus, CONFIG_MAX_CPUS);
}
static inline int
cpumap_find_next_zero(const struct cpumap *cpumap, int index)
{
return bitmap_find_next_zero(cpumap->cpus, CONFIG_MAX_CPUS, index);
}
static inline int
cpumap_find_first_zero(const struct cpumap *cpumap)
{
return bitmap_find_first_zero(cpumap->cpus, CONFIG_MAX_CPUS);
}
#define cpumap_for_each(cpumap, index) \
bitmap_for_each((cpumap)->cpus, CONFIG_MAX_CPUS, index)
#define cpumap_for_each_zero(cpumap, index) \
bitmap_for_each_zero((cpumap)->cpus, CONFIG_MAX_CPUS, index)
/*
* Return a cpumap representing all active processors.
*
* Until the cpumap module is initialized, the cpumap returned by this
* function describes the BSP only.
*/
const struct cpumap * cpumap_all(void);
/*
* Allocate a CPU map.
*
* The new map is uninitialized.
*/
int cpumap_create(struct cpumap **cpumapp);
/*
* Release a CPU map.
*/
void cpumap_destroy(struct cpumap *cpumap);
/*
* Check the validity of a CPU map.
*
* If the map doesn't identify at least one managed processor, return
* EINVAL.
*/
int cpumap_check(const struct cpumap *cpumap);
/*
* This init operation provides :
* - cpumap creation
* - module fully initialized
*/
INIT_OP_DECLARE(cpumap_setup);
#endif /* KERN_CPUMAP_H */
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