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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#ifndef __ASM_CPU_INFO_H
#define __ASM_CPU_INFO_H
#include <linux/cache.h>
#include <linux/types.h>
#include <asm/loongarch.h>
/* cache_desc->flags */
enum {
CACHE_PRESENT = (1 << 0),
CACHE_PRIVATE = (1 << 1), /* core private cache */
CACHE_INCLUSIVE = (1 << 2), /* include the inner level caches */
};
/*
* Descriptor for a cache
*/
struct cache_desc {
unsigned char type;
unsigned char level;
unsigned short sets; /* Number of lines per set */
unsigned char ways; /* Number of ways */
unsigned char linesz; /* Size of line in bytes */
unsigned char flags; /* Flags describing cache properties */
};
#define CACHE_LEVEL_MAX 3
#define CACHE_LEAVES_MAX 6
struct cpuinfo_loongarch {
u64 asid_cache;
unsigned long asid_mask;
/*
* Capability and feature descriptor structure for LoongArch CPU
*/
unsigned long long options;
unsigned int processor_id;
unsigned int fpu_vers;
unsigned int fpu_csr0;
unsigned int fpu_mask;
unsigned int cputype;
int isa_level;
int tlbsize;
int tlbsizemtlb;
int tlbsizestlbsets;
int tlbsizestlbways;
int cache_leaves_present; /* number of cache_leaves[] elements */
struct cache_desc cache_leaves[CACHE_LEAVES_MAX];
int core; /* physical core number in package */
int package;/* physical package number */
int vabits; /* Virtual Address size in bits */
int pabits; /* Physical Address size in bits */
unsigned int ksave_mask; /* Usable KSave mask. */
unsigned int watch_dreg_count; /* Number data breakpoints */
unsigned int watch_ireg_count; /* Number instruction breakpoints */
unsigned int watch_reg_use_cnt; /* min(NUM_WATCH_REGS, watch_dreg_count + watch_ireg_count), Usable by ptrace */
} __aligned(SMP_CACHE_BYTES);
extern struct cpuinfo_loongarch cpu_data[];
#define boot_cpu_data cpu_data[0]
#define current_cpu_data cpu_data[smp_processor_id()]
#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
extern void cpu_probe(void);
extern const char *__cpu_family[];
extern const char *__cpu_full_name[];
#define cpu_family_string() __cpu_family[raw_smp_processor_id()]
#define cpu_full_name_string() __cpu_full_name[raw_smp_processor_id()]
struct seq_file;
struct notifier_block;
extern int register_proc_cpuinfo_notifier(struct notifier_block *nb);
extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v);
#define proc_cpuinfo_notifier(fn, pri) \
({ \
static struct notifier_block fn##_nb = { \
.notifier_call = fn, \
.priority = pri \
}; \
\
register_proc_cpuinfo_notifier(&fn##_nb); \
})
struct proc_cpuinfo_notifier_args {
struct seq_file *m;
unsigned long n;
};
static inline bool cpus_are_siblings(int cpua, int cpub)
{
struct cpuinfo_loongarch *infoa = &cpu_data[cpua];
struct cpuinfo_loongarch *infob = &cpu_data[cpub];
if (infoa->package != infob->package)
return false;
if (infoa->core != infob->core)
return false;
return true;
}
static inline unsigned long cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo)
{
return cpuinfo->asid_mask;
}
static inline void set_cpu_asid_mask(struct cpuinfo_loongarch *cpuinfo,
unsigned long asid_mask)
{
cpuinfo->asid_mask = asid_mask;
}
#endif /* __ASM_CPU_INFO_H */
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