include/asm-mips/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 <asm/cache.h>
  16
  17 #ifdef CONFIG_SGI_IP27
  18 #include <asm/sn/types.h>
  19 #endif
  20
  21 /*
  22  * Descriptor for a cache
  23  */
  24 struct cache_desc {
  25         unsigned int waysize;   /* Bytes per way */
  26         unsigned short sets;    /* Number of lines per set */
  27         unsigned char ways;     /* Number of ways */
  28         unsigned char linesz;   /* Size of line in bytes */
  29         unsigned char waybit;   /* Bits to select in a cache set */
  30         unsigned char flags;    /* Flags describing cache properties */
  31 };
  32
  33 /*
  34  * Flag definitions
  35  */
  36 #define MIPS_CACHE_NOT_PRESENT  0x00000001
  37 #define MIPS_CACHE_VTAG         0x00000002      /* Virtually tagged cache */
  38 #define MIPS_CACHE_ALIASES      0x00000004      /* Cache could have aliases */
  39 #define MIPS_CACHE_IC_F_DC      0x00000008      /* Ic can refill from D-cache */
  40 #define MIPS_IC_SNOOPS_REMOTE   0x00000010      /* Ic snoops remote stores */
  41 #define MIPS_CACHE_PINDEX       0x00000020      /* Physically indexed cache */
  42
  43 struct cpuinfo_mips {
  44         unsigned long           udelay_val;
  45         unsigned long           asid_cache;
  46 #if defined(CONFIG_SGI_IP27)
  47 //      cpuid_t         p_cpuid;        /* PROM assigned cpuid */
  48         cnodeid_t       p_nodeid;       /* my node ID in compact-id-space */
  49         nasid_t         p_nasid;        /* my node ID in numa-as-id-space */
  50         unsigned char   p_slice;        /* Physical position on node board */
  51 #endif
  52 #if 0
  53         unsigned long           loops_per_sec;
  54         unsigned long           ipi_count;
  55         unsigned long           irq_attempt[NR_IRQS];
  56         unsigned long           smp_local_irq_count;
  57         unsigned long           prof_multiplier;
  58         unsigned long           prof_counter;
  59 #endif
  60
  61         /*
  62          * Capability and feature descriptor structure for MIPS CPU
  63          */
  64         unsigned long           options;
  65         unsigned long           ases;
  66         unsigned int            processor_id;
  67         unsigned int            fpu_id;
  68         unsigned int            cputype;
  69         int                     isa_level;
  70         int                     tlbsize;
  71         struct cache_desc       icache; /* Primary I-cache */
  72         struct cache_desc       dcache; /* Primary D or combined I/D cache */
  73         struct cache_desc       scache; /* Secondary cache */
  74         struct cache_desc       tcache; /* Tertiary/split secondary cache */
  75 #if defined(CONFIG_MIPS_MT_SMTC)
  76         /*
  77          * In the MIPS MT "SMTC" model, each TC is considered
  78          * to be a "CPU" for the purposes of scheduling, but
  79          * exception resources, ASID spaces, etc, are common
  80          * to all TCs within the same VPE.
  81          */
  82         int                     vpe_id;  /* Virtual Processor number */
  83         int                     tc_id;   /* Thread Context number */
  84 #endif /* CONFIG_MIPS_MT */
  85         void                    *data;  /* Additional data */
  86 } __attribute__((aligned(SMP_CACHE_BYTES)));
  87
  88 extern struct cpuinfo_mips cpu_data[];
  89 #define current_cpu_data cpu_data[smp_processor_id()]
  90 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
  91
  92 extern void cpu_probe(void);
  93 extern void cpu_report(void);
  94
  95 #endif /* __ASM_CPU_INFO_H */