osfmk/i386/cpu_capabilities.h

   1 /*
   2  * Copyright (c) 2003-2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #ifdef  PRIVATE
  29
  30 #ifndef _I386_CPU_CAPABILITIES_H
  31 #define _I386_CPU_CAPABILITIES_H
  32
  33 #ifndef __ASSEMBLER__
  34 #include <stdint.h>
  35 #endif
  36
  37 /*
  38  * This API only supported for Apple internal use.
  39  */
  40
  41 /* Bit definitions for _cpu_capabilities: */
  42
  43 #define kHasMMX                         0x00000001
  44 #define kHasSSE                         0x00000002
  45 #define kHasSSE2                        0x00000004
  46 #define kHasSSE3                        0x00000008
  47 #define kCache32                        0x00000010      /* cache line size is 32 bytes */
  48 #define kCache64                        0x00000020
  49 #define kCache128                       0x00000040
  50 #define kFastThreadLocalStorage         0x00000080      /* TLS ptr is kept in a user-mode-readable register */
  51 #define kHasSupplementalSSE3            0x00000100
  52 #define k64Bit                          0x00000200      /* processor supports EM64T (not what mode you're running in) */
  53 #define kHasSSE4_1                      0x00000400
  54 #define kHasSSE4_2                      0x00000800
  55 #define kHasAES                         0x00001000
  56 #define kInOrderPipeline                0x00002000
  57 #define kSlow                           0x00004000      /* tsc < nanosecond */
  58 #define kUP                             0x00008000      /* set if (kNumCPUs == 1) */
  59 #define kNumCPUs                        0x00FF0000      /* number of CPUs (see _NumCPUs() below) */
  60 #define kHasAVX1_0                      0x01000000
  61 #define kNumCPUsShift                   16              /* see _NumCPUs() below */
  62
  63 #ifndef __ASSEMBLER__
  64 #include <sys/cdefs.h>
  65
  66 __BEGIN_DECLS
  67 extern int  _get_cpu_capabilities( void );
  68 __END_DECLS
  69
  70 inline static
  71 int _NumCPUs( void )
  72 {
  73         return (_get_cpu_capabilities() & kNumCPUs) >> kNumCPUsShift;
  74 }
  75
  76 #endif /* __ASSEMBLER__ */
  77
  78 /* The following macro is used to generate the 64-bit commpage address for a given
  79  * routine, based on its 32-bit address.  This is used in the kernel to compile
  80  * the 64-bit commpage.  Since the kernel can be a 32-bit object, cpu_capabilities.h
  81  * only defines the 32-bit address.
  82  */
  83 #define _COMM_PAGE_32_TO_64( ADDRESS )  ( ADDRESS + _COMM_PAGE64_START_ADDRESS - _COMM_PAGE32_START_ADDRESS )
  84
  85
  86 /*
  87  * The shared kernel/user "comm page(s)":
  88  *
  89  * The last several pages of every address space are reserved for the kernel/user
  90  * "comm area". During system initialization, the kernel populates the comm pages with
  91  * code customized for the particular processor and platform.
  92  *
  93  * Because Mach VM cannot map the last page of an address space, we don't use it.
  94  */
  95
  96 #define _COMM_PAGE32_AREA_LENGTH        ( 2 * 4096 )                            /* reserved length of entire comm area */
  97 #define _COMM_PAGE32_BASE_ADDRESS       ( 0xffff0000 )                          /* base address of allocated memory */
  98 #define _COMM_PAGE32_START_ADDRESS      ( _COMM_PAGE32_BASE_ADDRESS )   /* address traditional commpage code starts on */
  99 #define _COMM_PAGE32_AREA_USED          ( 2 * 4096 )                            /* this is the amt actually allocated */
 100 #define _COMM_PAGE32_SIGS_OFFSET        0x8000                                      /* offset to routine signatures */
 101
 102 #define _COMM_PAGE64_AREA_LENGTH        ( 2 * 1024 * 1024 )                     /* reserved length of entire comm area (2MB) */
 103 #ifdef __ASSEMBLER__
 104 #define _COMM_PAGE64_BASE_ADDRESS       ( 0x00007fffffe00000 )   /* base address of allocated memory */
 105 #else /* __ASSEMBLER__ */
 106 #define _COMM_PAGE64_BASE_ADDRESS       ( 0x00007fffffe00000ULL )   /* base address of allocated memory */
 107 #endif /* __ASSEMBLER__ */
 108 #define _COMM_PAGE64_START_ADDRESS      ( _COMM_PAGE64_BASE_ADDRESS )   /* address traditional commpage code starts on */
 109 #define _COMM_PAGE64_AREA_USED          ( 2 * 4096 )                            /* this is the amt actually populated */
 110
 111 /* no need for an Objective-C area on Intel */
 112 #define _COMM_PAGE32_OBJC_SIZE          0ULL
 113 #define _COMM_PAGE32_OBJC_BASE          0ULL
 114 #define _COMM_PAGE64_OBJC_SIZE          0ULL
 115 #define _COMM_PAGE64_OBJC_BASE          0ULL
 116
 117 #ifdef KERNEL_PRIVATE
 118
 119 /* Inside the kernel, comm page addresses are absolute addresses
 120  * assuming they are a part of the 32-bit commpage. They may
 121  * be mapped somewhere else, especially for the 64-bit commpage.
 122  */
 123 #define _COMM_PAGE_START_ADDRESS        _COMM_PAGE32_START_ADDRESS
 124 #define _COMM_PAGE_SIGS_OFFSET          _COMM_PAGE32_SIGS_OFFSET
 125
 126 #else /* !KERNEL_PRIVATE */
 127
 128 #if defined(__i386__)
 129
 130 #define _COMM_PAGE_AREA_LENGTH          _COMM_PAGE32_AREA_LENGTH
 131 #define _COMM_PAGE_BASE_ADDRESS         _COMM_PAGE32_BASE_ADDRESS
 132 #define _COMM_PAGE_START_ADDRESS        _COMM_PAGE32_START_ADDRESS
 133 #define _COMM_PAGE_AREA_USED            _COMM_PAGE32_AREA_USED
 134 #define _COMM_PAGE_SIGS_OFFSET          _COMM_PAGE32_SIGS_OFFSET
 135
 136 #elif defined(__x86_64__)
 137
 138 #define _COMM_PAGE_AREA_LENGTH          _COMM_PAGE64_AREA_LENGTH
 139 #define _COMM_PAGE_BASE_ADDRESS         _COMM_PAGE64_BASE_ADDRESS
 140 #define _COMM_PAGE_START_ADDRESS        _COMM_PAGE64_START_ADDRESS
 141 #define _COMM_PAGE_AREA_USED            _COMM_PAGE64_AREA_USED
 142
 143 #else
 144 #error architecture not supported
 145 #endif
 146
 147 #endif /* !KERNEL_PRIVATE */
 148
 149 /* data in the comm page */
 150
 151 #define _COMM_PAGE_SIGNATURE            (_COMM_PAGE_START_ADDRESS+0x000)        /* first few bytes are a signature */
 152 #define _COMM_PAGE_VERSION              (_COMM_PAGE_START_ADDRESS+0x01E)        /* 16-bit version# */
 153 #define _COMM_PAGE_THIS_VERSION         12                                      /* version of the commarea format */
 154
 155 #define _COMM_PAGE_CPU_CAPABILITIES     (_COMM_PAGE_START_ADDRESS+0x020)        /* uint32_t _cpu_capabilities */
 156 #define _COMM_PAGE_NCPUS                (_COMM_PAGE_START_ADDRESS+0x022)        /* uint8_t number of configured CPUs (hw.logicalcpu at boot time) */
 157 #define _COMM_PAGE_UNUSED0                      (_COMM_PAGE_START_ADDRESS+0x024)        /* 2 unused bytes, reserved for future expansion of cpu_capabilities */
 158 #define _COMM_PAGE_CACHE_LINESIZE       (_COMM_PAGE_START_ADDRESS+0x026)        /* uint16_t cache line size */
 159
 160 #define _COMM_PAGE_SCHED_GEN            (_COMM_PAGE_START_ADDRESS+0x028)        /* uint32_t scheduler generation number (count of pre-emptions) */
 161 #define _COMM_PAGE_MEMORY_PRESSURE      (_COMM_PAGE_START_ADDRESS+0x02c)        /* uint32_t copy of vm_memory_pressure */
 162 #define _COMM_PAGE_SPIN_COUNT           (_COMM_PAGE_START_ADDRESS+0x030)        /* uint32_t max spin count for mutex's */
 163
 164 #define _COMM_PAGE_ACTIVE_CPUS          (_COMM_PAGE_START_ADDRESS+0x034)        /* uint8_t number of active CPUs (hw.activecpu) */
 165 #define _COMM_PAGE_PHYSICAL_CPUS        (_COMM_PAGE_START_ADDRESS+0x035)        /* uint8_t number of physical CPUs (hw.physicalcpu_max) */
 166 #define _COMM_PAGE_LOGICAL_CPUS (_COMM_PAGE_START_ADDRESS+0x036)        /* uint8_t number of logical CPUs (hw.logicalcpu_max) */
 167 #define _COMM_PAGE_UNUSED1              (_COMM_PAGE_START_ADDRESS+0x037)        /* 1 unused bytes */
 168 #define _COMM_PAGE_MEMORY_SIZE          (_COMM_PAGE_START_ADDRESS+0x038)        /* uint64_t max memory size */
 169
 170 #define _COMM_PAGE_CPUFAMILY            (_COMM_PAGE_START_ADDRESS+0x040)        /* uint32_t hw.cpufamily, x86*/
 171 #define _COMM_PAGE_UNUSED2              (_COMM_PAGE_START_ADDRESS+0x044)        /* [0x44,0x50) unused */
 172
 173 #define _COMM_PAGE_TIME_DATA_START      (_COMM_PAGE_START_ADDRESS+0x050)        /* base of offsets below (_NT_SCALE etc) */
 174 #define _COMM_PAGE_NT_TSC_BASE          (_COMM_PAGE_START_ADDRESS+0x050)        /* used by nanotime() */
 175 #define _COMM_PAGE_NT_SCALE             (_COMM_PAGE_START_ADDRESS+0x058)        /* used by nanotime() */
 176 #define _COMM_PAGE_NT_SHIFT             (_COMM_PAGE_START_ADDRESS+0x05c)        /* used by nanotime() */
 177 #define _COMM_PAGE_NT_NS_BASE           (_COMM_PAGE_START_ADDRESS+0x060)        /* used by nanotime() */
 178 #define _COMM_PAGE_NT_GENERATION        (_COMM_PAGE_START_ADDRESS+0x068)        /* used by nanotime() */
 179 #define _COMM_PAGE_GTOD_GENERATION      (_COMM_PAGE_START_ADDRESS+0x06c)        /* used by gettimeofday() */
 180 #define _COMM_PAGE_GTOD_NS_BASE         (_COMM_PAGE_START_ADDRESS+0x070)        /* used by gettimeofday() */
 181 #define _COMM_PAGE_GTOD_SEC_BASE        (_COMM_PAGE_START_ADDRESS+0x078)        /* used by gettimeofday() */
 182
 183 /* Warning: kernel commpage.h has a matching c typedef for the following.  They must be kept in sync.  */
 184 /* These offsets are from _COMM_PAGE_TIME_DATA_START */
 185
 186 #define _NT_TSC_BASE                    0
 187 #define _NT_SCALE                       8
 188 #define _NT_SHIFT                       12
 189 #define _NT_NS_BASE                     16
 190 #define _NT_GENERATION                  24
 191 #define _GTOD_GENERATION                28
 192 #define _GTOD_NS_BASE                   32
 193 #define _GTOD_SEC_BASE                  40
 194
 195  /* jump table (jmp to this address, which may be a branch to the actual code somewhere else) */
 196  /* When new jump table entries are added, corresponding symbols should be added below        */
 197  /* New slots should be allocated with at least 16-byte alignment. Some like bcopy require    */
 198  /* 32-byte alignment, and should be aligned as such in the assembly source before they are relocated */
 199 #define _COMM_PAGE_TEXT_START           (_COMM_PAGE_START_ADDRESS+0x080)    /* start of text section */
 200
 201 #define _COMM_PAGE_PREEMPT              (_COMM_PAGE_START_ADDRESS+0x5a0)        /* used by PFZ code */
 202 #define _COMM_PAGE_BACKOFF              (_COMM_PAGE_START_ADDRESS+0x1600)       /* called from PFZ */
 203
 204 #define _COMM_PAGE_PFZ_START            (_COMM_PAGE_START_ADDRESS+0x1c00)       /* start of Preemption Free Zone */
 205
 206 #define _COMM_PAGE_PFZ_ENQUEUE          (_COMM_PAGE_START_ADDRESS+0x1c00)       /* internal routine for FIFO enqueue */
 207 #define _COMM_PAGE_PFZ_DEQUEUE          (_COMM_PAGE_START_ADDRESS+0x1c80)       /* internal routine for FIFO dequeue */
 208 #define _COMM_PAGE_PFZ_MUTEX_LOCK       (_COMM_PAGE_START_ADDRESS+0x1d00)       /* internal routine for pthread_mutex_lock() */
 209
 210 #define _COMM_PAGE_UNUSED6              (_COMM_PAGE_START_ADDRESS+0x1d80)       /* unused space for PFZ code up to 0x1fff */
 211
 212 #define _COMM_PAGE_PFZ_END              (_COMM_PAGE_START_ADDRESS+0x1fff)       /* end of Preemption Free Zone */
 213
 214 #define _COMM_PAGE_END                  (_COMM_PAGE_START_ADDRESS+0x1fff)       /* end of common page - insert new stuff here */
 215
 216 /* _COMM_PAGE_COMPARE_AND_SWAP{32,64}B are not used on x86 and are
 217  * maintained here for source compatability.  These will be removed at
 218  * some point, so don't go relying on them. */
 219 #define _COMM_PAGE_COMPARE_AND_SWAP32B  (_COMM_PAGE_START_ADDRESS+0xf80)        /* compare-and-swap word w barrier */
 220 #define _COMM_PAGE_COMPARE_AND_SWAP64B  (_COMM_PAGE_START_ADDRESS+0xfc0)        /* compare-and-swap doubleword w barrier */
 221
 222 #ifdef __ASSEMBLER__
 223 #ifdef __COMM_PAGE_SYMBOLS
 224
 225 #define CREATE_COMM_PAGE_SYMBOL(symbol_name, symbol_address)            \
 226                                 .org    (symbol_address - (_COMM_PAGE_START_ADDRESS & 0xFFFFE000)) ;\
 227 symbol_name: nop
 228
 229         .text           /* Required to make a well behaved symbol file */
 230
 231         CREATE_COMM_PAGE_SYMBOL(___preempt, _COMM_PAGE_PREEMPT)
 232         CREATE_COMM_PAGE_SYMBOL(___backoff, _COMM_PAGE_BACKOFF)
 233         CREATE_COMM_PAGE_SYMBOL(___pfz_enqueue, _COMM_PAGE_PFZ_ENQUEUE)
 234         CREATE_COMM_PAGE_SYMBOL(___pfz_dequeue, _COMM_PAGE_PFZ_DEQUEUE)
 235         CREATE_COMM_PAGE_SYMBOL(___pfz_mutex_lock, _COMM_PAGE_PFZ_MUTEX_LOCK)
 236         CREATE_COMM_PAGE_SYMBOL(___end_comm_page, _COMM_PAGE_END)
 237
 238         .data           /* Required to make a well behaved symbol file */
 239         .long   0       /* Required to make a well behaved symbol file */
 240
 241 #endif /* __COMM_PAGE_SYMBOLS */
 242 #endif /* __ASSEMBLER__ */
 243
 244 #endif /* _I386_CPU_CAPABILITIES_H */
 245 #endif /* PRIVATE */