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/*
* 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/types.h>
#include <asm/cache.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 */
};
/*
* 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 {
unsigned long 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 */
int core; /* physical core number */
#ifdef CONFIG_64BIT
int vmbits; /* Virtual memory size in bits */
#endif
#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
/*
* There is not necessarily a 1:1 mapping of VPE num to CPU number
* in particular on multi-core systems.
*/
int vpe_id; /* Virtual Processor number */
#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;
} __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;
};
#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
# define cpu_vpe_id(cpuinfo) ((cpuinfo)->vpe_id)
#else
# define cpu_vpe_id(cpuinfo) ({ (void)cpuinfo; 0; })
#endif
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 */
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