Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 210 insertions, 0 deletions

diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h
new file mode 100644
index 000000000..ed7ffe4e6
--- /dev/null
+++ b/arch/mips/include/asm/cpu-info.h
@@ -0,0 +1,210 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 Waldorf GMBH
+ * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
+ * Copyright (C) 1996 Paul M. Antoine
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2004  Maciej W. Rozycki
+ */
+#ifndef __ASM_CPU_INFO_H
+#define __ASM_CPU_INFO_H
+
+#include <linux/cache.h>
+#include <linux/types.h>
+
+#include <asm/mipsregs.h>
+
+/*
+ * Descriptor for a cache
+ */
+struct cache_desc {
+	unsigned int waysize;	/* Bytes per way */
+	unsigned short sets;	/* Number of lines per set */
+	unsigned char ways;	/* Number of ways */
+	unsigned char linesz;	/* Size of line in bytes */
+	unsigned char waybit;	/* Bits to select in a cache set */
+	unsigned char flags;	/* Flags describing cache properties */
+};
+
+struct guest_info {
+	unsigned long		ases;
+	unsigned long		ases_dyn;
+	unsigned long long	options;
+	unsigned long long	options_dyn;
+	int			tlbsize;
+	u8			conf;
+	u8			kscratch_mask;
+};
+
+/*
+ * Flag definitions
+ */
+#define MIPS_CACHE_NOT_PRESENT	0x00000001
+#define MIPS_CACHE_VTAG		0x00000002	/* Virtually tagged cache */
+#define MIPS_CACHE_ALIASES	0x00000004	/* Cache could have aliases */
+#define MIPS_CACHE_IC_F_DC	0x00000008	/* Ic can refill from D-cache */
+#define MIPS_IC_SNOOPS_REMOTE	0x00000010	/* Ic snoops remote stores */
+#define MIPS_CACHE_PINDEX	0x00000020	/* Physically indexed cache */
+
+struct cpuinfo_mips {
+	u64			asid_cache;
+#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
+	unsigned long		asid_mask;
+#endif
+
+	/*
+	 * Capability and feature descriptor structure for MIPS CPU
+	 */
+	unsigned long		ases;
+	unsigned long long	options;
+	unsigned int		udelay_val;
+	unsigned int		processor_id;
+	unsigned int		fpu_id;
+	unsigned int		fpu_csr31;
+	unsigned int		fpu_msk31;
+	unsigned int		msa_id;
+	unsigned int		cputype;
+	int			isa_level;
+	int			tlbsize;
+	int			tlbsizevtlb;
+	int			tlbsizeftlbsets;
+	int			tlbsizeftlbways;
+	struct cache_desc	icache; /* Primary I-cache */
+	struct cache_desc	dcache; /* Primary D or combined I/D cache */
+	struct cache_desc	vcache; /* Victim cache, between pcache and scache */
+	struct cache_desc	scache; /* Secondary cache */
+	struct cache_desc	tcache; /* Tertiary/split secondary cache */
+	int			srsets; /* Shadow register sets */
+	int			package;/* physical package number */
+	unsigned int		globalnumber;
+#ifdef CONFIG_64BIT
+	int			vmbits; /* Virtual memory size in bits */
+#endif
+	void			*data;	/* Additional data */
+	unsigned int		watch_reg_count;   /* Number that exist */
+	unsigned int		watch_reg_use_cnt; /* Usable by ptrace */
+#define NUM_WATCH_REGS 4
+	u16			watch_reg_masks[NUM_WATCH_REGS];
+	unsigned int		kscratch_mask; /* Usable KScratch mask. */
+	/*
+	 * Cache Coherency attribute for write-combine memory writes.
+	 * (shifted by _CACHE_SHIFT)
+	 */
+	unsigned int		writecombine;
+	/*
+	 * Simple counter to prevent enabling HTW in nested
+	 * htw_start/htw_stop calls
+	 */
+	unsigned int		htw_seq;
+
+	/* VZ & Guest features */
+	struct guest_info	guest;
+	unsigned int		gtoffset_mask;
+	unsigned int		guestid_mask;
+	unsigned int		guestid_cache;
+} __attribute__((aligned(SMP_CACHE_BYTES)));
+
+extern struct cpuinfo_mips cpu_data[];
+#define current_cpu_data cpu_data[smp_processor_id()]
+#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
+#define boot_cpu_data cpu_data[0]
+
+extern void cpu_probe(void);
+extern void cpu_report(void);
+
+extern const char *__cpu_name[];
+#define cpu_name_string()	__cpu_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 unsigned int cpu_cluster(struct cpuinfo_mips *cpuinfo)
+{
+	/* Optimisation for systems where multiple clusters aren't used */
+	if (!IS_ENABLED(CONFIG_CPU_MIPSR6))
+		return 0;
+
+	return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_CLUSTER) >>
+		MIPS_GLOBALNUMBER_CLUSTER_SHF;
+}
+
+static inline unsigned int cpu_core(struct cpuinfo_mips *cpuinfo)
+{
+	return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_CORE) >>
+		MIPS_GLOBALNUMBER_CORE_SHF;
+}
+
+static inline unsigned int cpu_vpe_id(struct cpuinfo_mips *cpuinfo)
+{
+	/* Optimisation for systems where VP(E)s aren't used */
+	if (!IS_ENABLED(CONFIG_MIPS_MT_SMP) && !IS_ENABLED(CONFIG_CPU_MIPSR6))
+		return 0;
+
+	return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_VP) >>
+		MIPS_GLOBALNUMBER_VP_SHF;
+}
+
+extern void cpu_set_cluster(struct cpuinfo_mips *cpuinfo, unsigned int cluster);
+extern void cpu_set_core(struct cpuinfo_mips *cpuinfo, unsigned int core);
+extern void cpu_set_vpe_id(struct cpuinfo_mips *cpuinfo, unsigned int vpe);
+
+static inline bool cpus_are_siblings(int cpua, int cpub)
+{
+	struct cpuinfo_mips *infoa = &cpu_data[cpua];
+	struct cpuinfo_mips *infob = &cpu_data[cpub];
+	unsigned int gnuma, gnumb;
+
+	if (infoa->package != infob->package)
+		return false;
+
+	gnuma = infoa->globalnumber & ~MIPS_GLOBALNUMBER_VP;
+	gnumb = infob->globalnumber & ~MIPS_GLOBALNUMBER_VP;
+	if (gnuma != gnumb)
+		return false;
+
+	return true;
+}
+
+static inline unsigned long cpu_asid_inc(void)
+{
+	return 1 << CONFIG_MIPS_ASID_SHIFT;
+}
+
+static inline unsigned long cpu_asid_mask(struct cpuinfo_mips *cpuinfo)
+{
+#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
+	return cpuinfo->asid_mask;
+#endif
+	return ((1 << CONFIG_MIPS_ASID_BITS) - 1) << CONFIG_MIPS_ASID_SHIFT;
+}
+
+static inline void set_cpu_asid_mask(struct cpuinfo_mips *cpuinfo,
+				     unsigned long asid_mask)
+{
+#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
+	cpuinfo->asid_mask = asid_mask;
+#endif
+}
+
+#endif /* __ASM_CPU_INFO_H */