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-rw-r--r--arch/loongarch/include/asm/cpu-info.h123
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/cpu-info.h b/arch/loongarch/include/asm/cpu-info.h
new file mode 100644
index 000000000..cd73a6f57
--- /dev/null
+++ b/arch/loongarch/include/asm/cpu-info.h
@@ -0,0 +1,123 @@
+/* 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 */