arch/mips/include/asm/cpu-info.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1994 Waldorf GMBH
   7  * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
   8  * Copyright (C) 1996 Paul M. Antoine
   9  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  10  * Copyright (C) 2004  Maciej W. Rozycki
  11  */
  12 #ifndef __ASM_CPU_INFO_H
  13 #define __ASM_CPU_INFO_H
  14
  15 #include <linux/types.h>
  16
  17 #include <asm/cache.h>
  18
  19 /*
  20  * Descriptor for a cache
  21  */
  22 struct cache_desc {
  23         unsigned int waysize;   /* Bytes per way */
  24         unsigned short sets;    /* Number of lines per set */
  25         unsigned char ways;     /* Number of ways */
  26         unsigned char linesz;   /* Size of line in bytes */
  27         unsigned char waybit;   /* Bits to select in a cache set */
  28         unsigned char flags;    /* Flags describing cache properties */
  29 };
  30
  31 /*
  32  * Flag definitions
  33  */
  34 #define MIPS_CACHE_NOT_PRESENT  0x00000001
  35 #define MIPS_CACHE_VTAG         0x00000002      /* Virtually tagged cache */
  36 #define MIPS_CACHE_ALIASES      0x00000004      /* Cache could have aliases */
  37 #define MIPS_CACHE_IC_F_DC      0x00000008      /* Ic can refill from D-cache */
  38 #define MIPS_IC_SNOOPS_REMOTE   0x00000010      /* Ic snoops remote stores */
  39 #define MIPS_CACHE_PINDEX       0x00000020      /* Physically indexed cache */
  40
  41 struct cpuinfo_mips {
  42         unsigned int            udelay_val;
  43         unsigned int            asid_cache;
  44
  45         /*
  46          * Capability and feature descriptor structure for MIPS CPU
  47          */
  48         unsigned long           options;
  49         unsigned long           ases;
  50         unsigned int            processor_id;
  51         unsigned int            fpu_id;
  52         unsigned int            cputype;
  53         int                     isa_level;
  54         int                     tlbsize;
  55         struct cache_desc       icache; /* Primary I-cache */
  56         struct cache_desc       dcache; /* Primary D or combined I/D cache */
  57         struct cache_desc       scache; /* Secondary cache */
  58         struct cache_desc       tcache; /* Tertiary/split secondary cache */
  59         int                     srsets; /* Shadow register sets */
  60         int                     core;   /* physical core number */
  61 #ifdef CONFIG_64BIT
  62         int                     vmbits; /* Virtual memory size in bits */
  63 #endif
  64 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC)
  65         /*
  66          * In the MIPS MT "SMTC" model, each TC is considered
  67          * to be a "CPU" for the purposes of scheduling, but
  68          * exception resources, ASID spaces, etc, are common
  69          * to all TCs within the same VPE.
  70          */
  71         int                     vpe_id;  /* Virtual Processor number */
  72 #endif
  73 #ifdef CONFIG_MIPS_MT_SMTC
  74         int                     tc_id;   /* Thread Context number */
  75 #endif
  76         void                    *data;  /* Additional data */
  77         unsigned int            watch_reg_count;   /* Number that exist */
  78         unsigned int            watch_reg_use_cnt; /* Usable by ptrace */
  79 #define NUM_WATCH_REGS 4
  80         u16                     watch_reg_masks[NUM_WATCH_REGS];
  81         unsigned int            kscratch_mask; /* Usable KScratch mask. */
  82 } __attribute__((aligned(SMP_CACHE_BYTES)));
  83
  84 extern struct cpuinfo_mips cpu_data[];
  85 #define current_cpu_data cpu_data[smp_processor_id()]
  86 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
  87
  88 extern void cpu_probe(void);
  89 extern void cpu_report(void);
  90
  91 extern const char *__cpu_name[];
  92 #define cpu_name_string()       __cpu_name[smp_processor_id()]
  93
  94 #endif /* __ASM_CPU_INFO_H */