/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_CACHEINFO_H#define _LINUX_CACHEINFO_H #include <linux/bitops.h>#include <linux/cpumask.h>#include <linux/smp.h> struct device_node;struct attribute; enum cache_type {	CACHE_TYPE_NOCACHE = 0,	CACHE_TYPE_INST = BIT(0),	CACHE_TYPE_DATA = BIT(1),	CACHE_TYPE_SEPARATE = CACHE_TYPE_INST | CACHE_TYPE_DATA,	CACHE_TYPE_UNIFIED = BIT(2),}; /** * struct cacheinfo - represent a cache leaf node * @id: This cache's id. It is unique among caches with the same (type, level). * @type: type of the cache - data, inst or unified * @level: represents the hierarchy in the multi-level cache * @coherency_line_size: size of each cache line usually representing *	the minimum amount of data that gets transferred from memory * @number_of_sets: total number of sets, a set is a collection of cache *	lines sharing the same index * @ways_of_associativity: number of ways in which a particular memory *	block can be placed in the cache * @physical_line_partition: number of physical cache lines sharing the *	same cachetag * @size: Total size of the cache * @shared_cpu_map: logical cpumask representing all the cpus sharing *	this cache node * @attributes: bitfield representing various cache attributes * @of_node: if devicetree is used, this represents either the cpu node in *	case there's no explicit cache node or the cache node itself in the *	device tree * @disable_sysfs: indicates whether this node is visible to the user via *	sysfs or not * @priv: pointer to any private data structure specific to particular *	cache design * * While @of_node, @disable_sysfs and @priv are used for internal book * keeping, the remaining members form the core properties of the cache */struct cacheinfo {	unsigned int id;	enum cache_type type;	unsigned int level;	unsigned int coherency_line_size;	unsigned int number_of_sets;	unsigned int ways_of_associativity;	unsigned int physical_line_partition;	unsigned int size;	cpumask_t shared_cpu_map;	unsigned int attributes;#define CACHE_WRITE_THROUGH	BIT(0)#define CACHE_WRITE_BACK	BIT(1)#define CACHE_WRITE_POLICY_MASK		\	(CACHE_WRITE_THROUGH | CACHE_WRITE_BACK)#define CACHE_READ_ALLOCATE	BIT(2)#define CACHE_WRITE_ALLOCATE	BIT(3)#define CACHE_ALLOCATE_POLICY_MASK	\	(CACHE_READ_ALLOCATE | CACHE_WRITE_ALLOCATE)#define CACHE_ID		BIT(4) 	struct device_node *of_node;	bool disable_sysfs;	void *priv;}; struct cpu_cacheinfo {	struct cacheinfo *info_list;	unsigned int num_levels;	unsigned int num_leaves;	bool cpu_map_populated;}; /* * Helpers to make sure "func" is executed on the cpu whose cache * attributes are being detected */#define DEFINE_SMP_CALL_CACHE_FUNCTION(func)			\static inline void _##func(void *ret)				\{								\	int cpu = smp_processor_id();				\	*(int *)ret = __##func(cpu);				\}								\								\int func(unsigned int cpu)					\{								\	int ret;						\	smp_call_function_single(cpu, _##func, &ret, true);	\	return ret;						\} struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu);int init_cache_level(unsigned int cpu);int populate_cache_leaves(unsigned int cpu); const struct attribute_group *cache_get_priv_group(struct cacheinfo *this_leaf); #endif /* _LINUX_CACHEINFO_H */