xnu-3789.70.16.tar.gz

[apple/xnu.git] / osfmk / i386 / cpu_capabilities.h

diff --git a/osfmk/i386/cpu_capabilities.h b/osfmk/i386/cpu_capabilities.h
index 08d4f0beaefab2bdae24e628e65726a1afaf11da..0f1b7dadde186b2c515417da97ca46762f85ebac 100644 (file)
--- a/osfmk/i386/cpu_capabilities.h
+++ b/osfmk/i386/cpu_capabilities.h
@@ -1,23 +1,29 @@
 /*
 /*

- * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2009 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * 

- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.

  * 
  * 

- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.

  * 
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 #ifdef PRIVATE
 
  */
 #ifdef PRIVATE
 


@@ -29,10 +35,7 @@
 #endif
  
 /*
 #endif
  
 /*

- * This is the authoritative way to determine from user mode what
- * implementation-specific processor features are available.

  * This API only supported for Apple internal use.
  * This API only supported for Apple internal use.

- * 

  */
 
 /* Bit definitions for _cpu_capabilities: */
  */
 
 /* Bit definitions for _cpu_capabilities: */


@@ -41,151 +44,247 @@
 #define        kHasSSE                         0x00000002
 #define        kHasSSE2                        0x00000004
 #define        kHasSSE3                        0x00000008
 #define        kHasSSE                         0x00000002
 #define        kHasSSE2                        0x00000004
 #define        kHasSSE3                        0x00000008

-#define        kCache32                        0x00000010      // cache line size is 32 bytes
+#define        kCache32                        0x00000010      /* cache line size is 32 bytes */

 #define        kCache64                        0x00000020
 #define        kCache128                       0x00000040
 #define        kCache64                        0x00000020
 #define        kCache128                       0x00000040

-#define        kFastThreadLocalStorage         0x00000080      // TLS ptr is kept in a user-mode-readable register
-
-#define        kUP                             0x00008000      // set if (kNumCPUs == 1)
-#define        kNumCPUs                        0x00FF0000      // number of CPUs (see _NumCPUs() below)
+#define        kFastThreadLocalStorage         0x00000080      /* TLS ptr is kept in a user-mode-readable register */
+#define kHasSupplementalSSE3           0x00000100
+#define        k64Bit                          0x00000200      /* processor supports EM64T (not what mode you're running in) */
+#define        kHasSSE4_1                      0x00000400
+#define        kHasSSE4_2                      0x00000800
+#define        kHasAES                         0x00001000
+#define        kInOrderPipeline                0x00002000
+#define        kSlow                           0x00004000      /* tsc < nanosecond */
+#define        kUP                             0x00008000      /* set if (kNumCPUs == 1) */
+#define        kNumCPUs                        0x00FF0000      /* number of CPUs (see _NumCPUs() below) */
+#define        kNumCPUsShift                   16
+#define        kHasAVX1_0                      0x01000000
+#define        kHasRDRAND                      0x02000000
+#define        kHasF16C                        0x04000000
+#define        kHasENFSTRG                     0x08000000
+#define        kHasFMA                         0x10000000
+#define        kHasAVX2_0                      0x20000000
+#define        kHasBMI1                        0x40000000
+#define        kHasBMI2                        0x80000000
+/* Extending into 64-bits from here: */ 
+#define        kHasRTM                 0x0000000100000000ULL
+#define        kHasHLE                 0x0000000200000000ULL
+#define        kHasRDSEED              0x0000000800000000ULL
+#define        kHasADX                 0x0000000400000000ULL
+#define        kHasMPX                 0x0000001000000000ULL
+#define        kHasSGX                 0x0000002000000000ULL

 
 

-#define        kNumCPUsShift           16                      // see _NumCPUs() below

 
 #ifndef        __ASSEMBLER__
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
 #ifndef        __ASSEMBLER__
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS

-extern int  _get_cpu_capabilities( void );
+extern uint64_t  _get_cpu_capabilities( void );

 __END_DECLS
 
 __END_DECLS
 

-inline static
+__inline static

 int _NumCPUs( void )
 {
 int _NumCPUs( void )
 {

-       return (_get_cpu_capabilities() & kNumCPUs) >> kNumCPUsShift;
+       return (int) (_get_cpu_capabilities() & kNumCPUs) >> kNumCPUsShift;

 }
 
 #endif /* __ASSEMBLER__ */
 
 }
 
 #endif /* __ASSEMBLER__ */
 

+/* The following macro is used to generate the 64-bit commpage address for a given
+ * routine, based on its 32-bit address.  This is used in the kernel to compile
+ * the 64-bit commpage.  Since the kernel can be a 32-bit object, cpu_capabilities.h
+ * only defines the 32-bit address.
+ */
+#define        _COMM_PAGE_32_TO_64( ADDRESS )  ( ADDRESS + _COMM_PAGE64_START_ADDRESS - _COMM_PAGE32_START_ADDRESS )
+

 
 /*
  * The shared kernel/user "comm page(s)":
  *
 
 /*
  * The shared kernel/user "comm page(s)":
  *

- * The last eight pages of every address space are reserved for the kernel/user
- * "comm area". During system initialization, the kernel populates the comm page with
+ * The last several pages of every address space are reserved for the kernel/user
+ * "comm area". During system initialization, the kernel populates the comm pages with

  * code customized for the particular processor and platform.
  *
  * code customized for the particular processor and platform.
  *

- * Because Mach VM cannot map the last page of an address space, the max length of
- * the comm area is seven pages.
+ * Because Mach VM cannot map the last page of an address space, we don't use it.

  */
  
  */
  

-#define        _COMM_PAGE_AREA_LENGTH  (19*4096)
-                                       // reserved length of entire comm area
-#define _COMM_PAGE_BASE_ADDRESS (-20*4096)
-                                       // VM_MAX_ADDRESS-_COMM_PAGE_AREA_LENGTH
-#define _COMM_PAGE_START_ADDRESS (-16*4096)
-                                       // VM_MAX_ADDRESS-_COMM_PAGE_AREA_LENGTH
-#define _COMM_PAGE_SIGS_OFFSET 0x8000
-                                       // offset to routine signatures
+#define        _COMM_PAGE32_AREA_LENGTH        ( 1 * 4096 )                            /* reserved length of entire comm area */
+#define _COMM_PAGE32_BASE_ADDRESS      ( 0xffff0000 )                          /* base address of allocated memory */
+#define _COMM_PAGE32_START_ADDRESS     ( _COMM_PAGE32_BASE_ADDRESS )   /* address traditional commpage code starts on */
+#define _COMM_PAGE32_AREA_USED         ( 1 * 4096 )                            /* this is the amt actually allocated */
+#define _COMM_PAGE32_SIGS_OFFSET       0x8000                                      /* offset to routine signatures */
+
+#define        _COMM_PAGE64_AREA_LENGTH        ( 1 * 4096 )                    /* reserved length of entire comm area (2MB) */
+#ifdef __ASSEMBLER__
+#define _COMM_PAGE64_BASE_ADDRESS      ( 0x00007fffffe00000 )   /* base address of allocated memory */
+#else /* __ASSEMBLER__ */
+#define _COMM_PAGE64_BASE_ADDRESS      ( 0x00007fffffe00000ULL )   /* base address of allocated memory */
+#endif /* __ASSEMBLER__ */
+#define _COMM_PAGE64_START_ADDRESS     ( _COMM_PAGE64_BASE_ADDRESS )   /* address traditional commpage code starts on */
+#define _COMM_PAGE64_AREA_USED         ( 1 * 4096 )                            /* this is the amt actually populated */
+
+/* no need for an Objective-C area on Intel */
+#define _COMM_PAGE32_OBJC_SIZE         0ULL
+#define _COMM_PAGE32_OBJC_BASE         0ULL
+#define _COMM_PAGE64_OBJC_SIZE         0ULL
+#define _COMM_PAGE64_OBJC_BASE         0ULL
+
+#ifdef KERNEL_PRIVATE
+
+/* Inside the kernel, comm page addresses are absolute addresses
+ * assuming they are a part of the 32-bit commpage. They may
+ * be mapped somewhere else, especially for the 64-bit commpage.
+ */
+#define _COMM_PAGE_START_ADDRESS       _COMM_PAGE32_START_ADDRESS
+#define _COMM_PAGE_SIGS_OFFSET         _COMM_PAGE32_SIGS_OFFSET
+
+#else /* !KERNEL_PRIVATE */
+
+#if defined(__i386__)
+
+#define        _COMM_PAGE_AREA_LENGTH          _COMM_PAGE32_AREA_LENGTH
+#define _COMM_PAGE_BASE_ADDRESS                _COMM_PAGE32_BASE_ADDRESS
+#define _COMM_PAGE_START_ADDRESS       _COMM_PAGE32_START_ADDRESS
+#define _COMM_PAGE_AREA_USED           _COMM_PAGE32_AREA_USED
+#define _COMM_PAGE_SIGS_OFFSET         _COMM_PAGE32_SIGS_OFFSET
+
+#elif defined(__x86_64__)
+
+#define        _COMM_PAGE_AREA_LENGTH          _COMM_PAGE64_AREA_LENGTH
+#define _COMM_PAGE_BASE_ADDRESS                _COMM_PAGE64_BASE_ADDRESS
+#define _COMM_PAGE_START_ADDRESS       _COMM_PAGE64_START_ADDRESS
+#define _COMM_PAGE_AREA_USED           _COMM_PAGE64_AREA_USED
+
+#else
+#error architecture not supported
+#endif

  
  

+#endif /* !KERNEL_PRIVATE */
+

 /* data in the comm page */
  
 /* data in the comm page */
  

-#define _COMM_PAGE_SIGNATURE                   (_COMM_PAGE_START_ADDRESS+0x000)        // first few bytes are a signature
-#define _COMM_PAGE_VERSION                             (_COMM_PAGE_START_ADDRESS+0x01E)        // 16-bit version#
-#define        _COMM_PAGE_THIS_VERSION                 3                                                               // version of the commarea format
+#define _COMM_PAGE_SIGNATURE           (_COMM_PAGE_START_ADDRESS+0x000)        /* first 16 bytes are a signature */
+#define _COMM_PAGE_SIGNATURELEN                (0x10)
+#define _COMM_PAGE_CPU_CAPABILITIES64  (_COMM_PAGE_START_ADDRESS+0x010)        /* uint64_t _cpu_capabilities */
+#define _COMM_PAGE_UNUSED              (_COMM_PAGE_START_ADDRESS+0x018)        /* 6 unused bytes */
+#define _COMM_PAGE_VERSION             (_COMM_PAGE_START_ADDRESS+0x01E)        /* 16-bit version# */
+#define _COMM_PAGE_THIS_VERSION                13                                      /* in ver 13, _COMM_PAGE_NT_SHIFT defaults to 0 (was 32) */

   
   

-#define _COMM_PAGE_CPU_CAPABILITIES            (_COMM_PAGE_START_ADDRESS+0x020)        // uint32_t _cpu_capabilities
-#define _COMM_PAGE_NCPUS                               (_COMM_PAGE_START_ADDRESS+0x021)        // uint8_t number of configured CPUs
-#define _COMM_PAGE_VECTOR_FLAVOR               (_COMM_PAGE_START_ADDRESS+0x024)        // uint8_t SSE/SSE2/SSE3 
-#define _COMM_PAGE_CACHE_LINESIZE              (_COMM_PAGE_START_ADDRESS+0x026)        // uint16_t cache line size
- 
-#define _COMM_PAGE_UNUSED1                             (_COMM_PAGE_START_ADDRESS+0x030)        // 16 unused bytes
- 
-#define _COMM_PAGE_2_TO_52                             (_COMM_PAGE_START_ADDRESS+0x040)        // double float constant 2**52
-#define _COMM_PAGE_10_TO_6                             (_COMM_PAGE_START_ADDRESS+0x048)        // double float constant 10**6
- 
-#define _COMM_PAGE_UNUSED2                             (_COMM_PAGE_START_ADDRESS+0x050)        // 16 unused bytes
- 
-#define _COMM_PAGE_TIMEBASE                            (_COMM_PAGE_START_ADDRESS+0x060)        // used by gettimeofday()
-#define _COMM_PAGE_TIMESTAMP                   (_COMM_PAGE_START_ADDRESS+0x068)        // used by gettimeofday()
-#define _COMM_PAGE_SEC_PER_TICK                        (_COMM_PAGE_START_ADDRESS+0x070)        // used by gettimeofday()
- 
- /* jump table (bla to this address, which may be a branch to the actual code somewhere else) */
- /* When new jump table entries are added, corresponding symbols should be added below         */
-
-#define _COMM_PAGE_COMPARE_AND_SWAP32   (_COMM_PAGE_START_ADDRESS+0x080) // compare-and-swap word
-#define _COMM_PAGE_COMPARE_AND_SWAP64   (_COMM_PAGE_START_ADDRESS+0x0c0) // compare-and-swap doubleword
-#define _COMM_PAGE_ENQUEUE              (_COMM_PAGE_START_ADDRESS+0x100) // enqueue
-#define _COMM_PAGE_DEQUEUE              (_COMM_PAGE_START_ADDRESS+0x140) // dequeue
-#define _COMM_PAGE_MEMORY_BARRIER       (_COMM_PAGE_START_ADDRESS+0x180) // add atomic doubleword
-#define _COMM_PAGE_ATOMIC_ADD32         (_COMM_PAGE_START_ADDRESS+0x1a0) // add atomic word
-#define _COMM_PAGE_ATOMIC_ADD64         (_COMM_PAGE_START_ADDRESS+0x1c0) // add atomic doubleword
-
-#define _COMM_PAGE_NANOTIME_INFO        (_COMM_PAGE_START_ADDRESS+0x1e0) // 32 bytes used by nanotime()
- 
-#define _COMM_PAGE_ABSOLUTE_TIME               (_COMM_PAGE_START_ADDRESS+0x200)        // mach_absolute_time()
-#define _COMM_PAGE_SPINLOCK_TRY                        (_COMM_PAGE_START_ADDRESS+0x220)        // spinlock_try()
-#define _COMM_PAGE_SPINLOCK_LOCK               (_COMM_PAGE_START_ADDRESS+0x260)        // spinlock_lock()
-#define _COMM_PAGE_SPINLOCK_UNLOCK             (_COMM_PAGE_START_ADDRESS+0x2a0)        // spinlock_unlock()
-#define _COMM_PAGE_PTHREAD_GETSPECIFIC  (_COMM_PAGE_START_ADDRESS+0x2c0)       // pthread_getspecific()
-#define _COMM_PAGE_GETTIMEOFDAY                        (_COMM_PAGE_START_ADDRESS+0x2e0)        // used by gettimeofday()
-#define _COMM_PAGE_FLUSH_DCACHE                        (_COMM_PAGE_START_ADDRESS+0x4e0)        // sys_dcache_flush()
-#define _COMM_PAGE_FLUSH_ICACHE                        (_COMM_PAGE_START_ADDRESS+0x520)        // sys_icache_invalidate()
-#define _COMM_PAGE_PTHREAD_SELF                        (_COMM_PAGE_START_ADDRESS+0x580)        // pthread_self()
-#define _COMM_PAGE_UNUSED4                             (_COMM_PAGE_START_ADDRESS+0x5a0)        // 32 unused bytes
-#define _COMM_PAGE_RELINQUISH                  (_COMM_PAGE_START_ADDRESS+0x5c0) // used by spinlocks
+#define _COMM_PAGE_CPU_CAPABILITIES    (_COMM_PAGE_START_ADDRESS+0x020)        /* uint32_t _cpu_capabilities (retained for compatibility) */
+#define _COMM_PAGE_NCPUS               (_COMM_PAGE_START_ADDRESS+0x022)        /* uint8_t number of configured CPUs (hw.logicalcpu at boot time) */
+#define _COMM_PAGE_UNUSED0             (_COMM_PAGE_START_ADDRESS+0x024)        /* 2 unused bytes, previouly reserved for expansion of cpu_capabilities */
+#define _COMM_PAGE_CACHE_LINESIZE      (_COMM_PAGE_START_ADDRESS+0x026)        /* uint16_t cache line size */
+
+#define _COMM_PAGE_SCHED_GEN           (_COMM_PAGE_START_ADDRESS+0x028)        /* uint32_t scheduler generation number (count of pre-emptions) */
+#define _COMM_PAGE_MEMORY_PRESSURE     (_COMM_PAGE_START_ADDRESS+0x02c)        /* uint32_t copy of vm_memory_pressure */
+#define        _COMM_PAGE_SPIN_COUNT           (_COMM_PAGE_START_ADDRESS+0x030)        /* uint32_t max spin count for mutex's */
+
+#define _COMM_PAGE_ACTIVE_CPUS         (_COMM_PAGE_START_ADDRESS+0x034)        /* uint8_t number of active CPUs (hw.activecpu) */
+#define _COMM_PAGE_PHYSICAL_CPUS       (_COMM_PAGE_START_ADDRESS+0x035)        /* uint8_t number of physical CPUs (hw.physicalcpu_max) */
+#define _COMM_PAGE_LOGICAL_CPUS        (_COMM_PAGE_START_ADDRESS+0x036)        /* uint8_t number of logical CPUs (hw.logicalcpu_max) */
+#define _COMM_PAGE_UNUSED1             (_COMM_PAGE_START_ADDRESS+0x037)        /* 1 unused bytes */
+#define _COMM_PAGE_MEMORY_SIZE         (_COMM_PAGE_START_ADDRESS+0x038)        /* uint64_t max memory size */
+
+#define _COMM_PAGE_CPUFAMILY           (_COMM_PAGE_START_ADDRESS+0x040)        /* uint32_t hw.cpufamily, x86*/
+#define _COMM_PAGE_KDEBUG_ENABLE       (_COMM_PAGE_START_ADDRESS+0x044)        /* uint32_t export "kdebug_enable" to userspace */
+#define        _COMM_PAGE_ATM_DIAGNOSTIC_CONFIG        (_COMM_PAGE_START_ADDRESS+0x48) /* uint32_t export "atm_diagnostic_config" to userspace */
+
+#define _COMM_PAGE_UNUSED2             (_COMM_PAGE_START_ADDRESS+0x04C)        /* [0x4C,0x50) unused */
+
+#define        _COMM_PAGE_TIME_DATA_START      (_COMM_PAGE_START_ADDRESS+0x050)        /* base of offsets below (_NT_SCALE etc) */
+#define _COMM_PAGE_NT_TSC_BASE         (_COMM_PAGE_START_ADDRESS+0x050)        /* used by nanotime() */
+#define _COMM_PAGE_NT_SCALE            (_COMM_PAGE_START_ADDRESS+0x058)        /* used by nanotime() */
+#define _COMM_PAGE_NT_SHIFT            (_COMM_PAGE_START_ADDRESS+0x05c)        /* used by nanotime() */
+#define _COMM_PAGE_NT_NS_BASE          (_COMM_PAGE_START_ADDRESS+0x060)        /* used by nanotime() */
+#define _COMM_PAGE_NT_GENERATION       (_COMM_PAGE_START_ADDRESS+0x068)        /* used by nanotime() */
+#define _COMM_PAGE_GTOD_GENERATION     (_COMM_PAGE_START_ADDRESS+0x06c)        /* used by gettimeofday() */
+#define _COMM_PAGE_GTOD_NS_BASE                (_COMM_PAGE_START_ADDRESS+0x070)        /* used by gettimeofday() */
+#define _COMM_PAGE_GTOD_SEC_BASE       (_COMM_PAGE_START_ADDRESS+0x078)        /* used by gettimeofday() */

  
  

-#define _COMM_PAGE_BTS                         (_COMM_PAGE_START_ADDRESS+0x5e0) // bit test-and-set 
-#define _COMM_PAGE_BTC                                 (_COMM_PAGE_START_ADDRESS+0x5f0) // bit test-and-clear 
+/* NOTE: APPROX_TIME must be aligned to 64-byte cache line size: */
+#define _COMM_PAGE_APPROX_TIME         (_COMM_PAGE_START_ADDRESS+0x080)        /* used by mach_approximate_time() */
+#define _COMM_PAGE_APPROX_TIME_SUPPORTED (_COMM_PAGE_START_ADDRESS+0x088)      /* used by mach_approximate_time() */
+
+/* Align following entries to next cache line */
+#define _COMM_PAGE_CONT_TIMEBASE       (_COMM_PAGE_START_ADDRESS+0x0C0)        /* used by mach_continuous_time() */
+#define _COMM_PAGE_BOOTTIME_USEC       (_COMM_PAGE_START_ADDRESS+0x0C8)        /* uint64_t boottime */
+
+#define _COMM_PAGE_END                 (_COMM_PAGE_START_ADDRESS+0xfff)        /* end of common page */
+
+/* Warning: kernel commpage.h has a matching c typedef for the following.  They must be kept in sync.  */
+/* These offsets are from _COMM_PAGE_TIME_DATA_START */
+
+#define        _NT_TSC_BASE                    0
+#define        _NT_SCALE                       8
+#define        _NT_SHIFT                       12
+#define        _NT_NS_BASE                     16
+#define        _NT_GENERATION                  24
+#define        _GTOD_GENERATION                28
+#define        _GTOD_NS_BASE                   32
+#define        _GTOD_SEC_BASE                  40

  
  

-#define _COMM_PAGE_BZERO                               (_COMM_PAGE_START_ADDRESS+0x600)        // bzero()
-#define _COMM_PAGE_BCOPY                               (_COMM_PAGE_START_ADDRESS+0x780)        // bcopy()
-#define        _COMM_PAGE_MEMCPY                               (_COMM_PAGE_START_ADDRESS+0x7a0)        // memcpy()
-#define        _COMM_PAGE_MEMMOVE                              (_COMM_PAGE_START_ADDRESS+0x7a0)        // memmove()
+ /* jump table (jmp to this address, which may be a branch to the actual code somewhere else) */
+ /* When new jump table entries are added, corresponding symbols should be added below        */
+ /* New slots should be allocated with at least 16-byte alignment. Some like bcopy require    */
+ /* 32-byte alignment, and should be aligned as such in the assembly source before they are relocated */
+#define _COMM_PAGE_TEXT_START          (_COMM_PAGE_START_ADDRESS+0x1000)
+#define _COMM_PAGE32_TEXT_START         (_COMM_PAGE32_BASE_ADDRESS+0x1000)    /* start of text section */
+#define _COMM_PAGE64_TEXT_START                (_COMM_PAGE64_BASE_ADDRESS+0x1000)
+#define _COMM_PAGE_TEXT_AREA_USED      ( 1 * 4096 )
+#define _COMM_PAGE_TEXT_AREA_LENGTH    ( 1 * 4096 )
+#define _PFZ32_SLIDE_RANGE             ( 14 ) /* pages between 0xfffff000 and _COMM_PAGE32_TEXT_START */
+#define _PFZ64_SLIDE_RANGE             ( 510 ) /* pages between 0x00007ffffffff000 and _COMM_PAGE64_TEXT_START */
+
+/* setup start offset in the commpage text region for each jump table entry 
+ * the Comm Page Offset is shortened to _COMM_TEXT_[label]_OFFSET
+ */

 
 

-#define        _COMM_PAGE_NANOTIME                             (_COMM_PAGE_START_ADDRESS+0xF80) // nanotime()
+#define _COMM_TEXT_PREEMPT_OFFSET              (0x5a0) /* called from withing pfz */
+#define _COMM_TEXT_BACKOFF_OFFSET              (0x600) /* called from PFZ */
+#define _COMM_TEXT_RET_OFFSET                  (0x680) /* called from PFZ */
+#define _COMM_TEXT_PFZ_START_OFFSET            (0xc00) /* offset for Preemption Free Zone */
+#define _COMM_TEXT_PFZ_ENQUEUE_OFFSET          (0xc00) /* internal FIFO enqueue */
+#define _COMM_TEXT_PFZ_DEQUEUE_OFFSET          (0xc80) /* internal FIFO dequeue */
+#define _COMM_TEXT_UNUSED_OFFSET               (0xd00) /* end of routines in text page */
+#define _COMM_TEXT_PFZ_END_OFFSET              (0xd00) /* offset for end of PFZ */

 
 

-#define        _COMM_PAGE_BIGCOPY                              (_COMM_PAGE_START_ADDRESS+0x1000)// very-long-operand copies

 
 

-#define _COMM_PAGE_END                                 (_COMM_PAGE_START_ADDRESS+0x1600)// end of common page
+#define _COMM_PAGE_PREEMPT             (_COMM_PAGE_TEXT_START+_COMM_TEXT_PREEMPT_OFFSET)
+#define _COMM_PAGE_BACKOFF             (_COMM_PAGE_TEXT_START+_COMM_TEXT_BACKOFF_OFFSET)       
+#define _COMM_PAGE_RET                 (_COMM_PAGE_TEXT_START+_COMM_TEXT_RET_OFFSET)   
+
+#define _COMM_PAGE_PFZ_START           (_COMM_PAGE_TEXT_START+_COMM_PAGE_PFZ_START_OFFSET)
+
+#define _COMM_PAGE_PFZ_ENQUEUE         (_COMM_PAGE_TEXT_START+_COMM_TEXT_PFZ_ENQUEUE_OFFSET)
+#define _COMM_PAGE_PFZ_DEQUEUE         (_COMM_PAGE_TEXT_START+_COMM_TEXT_PFZ_DEQUEUE_OFFSET)
+
+#define        _COMM_PAGE_UNUSED6              (_COMM_PAGE_TEXT_START+_COMM_TEXT_UNUSED_OFFSET)        
+#define _COMM_PAGE_PFZ_END             (_COMM_PAGE_TEXT_START+_COMM_TEXT_PFZ_END_OFFSET)
+#define _COMM_PAGE_TEXT_END            (_COMM_PAGE_TEXT_START+_COMM_TEXT_PFZ_END_OFFSET) /* end of common text page */
+
+/* _COMM_PAGE_COMPARE_AND_SWAP{32,64}B are not used on x86 and are
+ * maintained here for source compatability.  These will be removed at
+ * some point, so don't go relying on them. */
+#define _COMM_PAGE_COMPARE_AND_SWAP32B  (_COMM_PAGE_START_ADDRESS+0xf80)       /* compare-and-swap word w barrier */
+#define _COMM_PAGE_COMPARE_AND_SWAP64B  (_COMM_PAGE_START_ADDRESS+0xfc0)       /* compare-and-swap doubleword w barrier */

 
 #ifdef __ASSEMBLER__
 #ifdef __COMM_PAGE_SYMBOLS
 
 #define CREATE_COMM_PAGE_SYMBOL(symbol_name, symbol_address)           \
 
 #ifdef __ASSEMBLER__
 #ifdef __COMM_PAGE_SYMBOLS
 
 #define CREATE_COMM_PAGE_SYMBOL(symbol_name, symbol_address)           \

-                               .org    (symbol_address - (_COMM_PAGE_BASE_ADDRESS & 0xFFFFE000)) ;\
+                               .org    (symbol_address - (_COMM_PAGE_START_ADDRESS & 0xFFFFE000)) ;\

 symbol_name: nop
 
 symbol_name: nop
 

-       .text           // Required to make a well behaved symbol file
-
-       CREATE_COMM_PAGE_SYMBOL(___compare_and_swap32, _COMM_PAGE_COMPARE_AND_SWAP32)
-       CREATE_COMM_PAGE_SYMBOL(___compare_and_swap64, _COMM_PAGE_COMPARE_AND_SWAP64)
-       CREATE_COMM_PAGE_SYMBOL(___atomic_enqueue, _COMM_PAGE_ENQUEUE)
-       CREATE_COMM_PAGE_SYMBOL(___atomic_dequeue, _COMM_PAGE_DEQUEUE)
-       CREATE_COMM_PAGE_SYMBOL(___memory_barrier, _COMM_PAGE_MEMORY_BARRIER)
-       CREATE_COMM_PAGE_SYMBOL(___atomic_add32, _COMM_PAGE_ATOMIC_ADD32)
-       CREATE_COMM_PAGE_SYMBOL(___atomic_add64, _COMM_PAGE_ATOMIC_ADD64)
-       CREATE_COMM_PAGE_SYMBOL(___mach_absolute_time, _COMM_PAGE_ABSOLUTE_TIME)
-       CREATE_COMM_PAGE_SYMBOL(___spin_lock_try, _COMM_PAGE_SPINLOCK_TRY)
-       CREATE_COMM_PAGE_SYMBOL(___spin_lock, _COMM_PAGE_SPINLOCK_LOCK)
-       CREATE_COMM_PAGE_SYMBOL(___spin_unlock, _COMM_PAGE_SPINLOCK_UNLOCK)
-       CREATE_COMM_PAGE_SYMBOL(___pthread_getspecific, _COMM_PAGE_PTHREAD_GETSPECIFIC)
-       CREATE_COMM_PAGE_SYMBOL(___gettimeofday, _COMM_PAGE_GETTIMEOFDAY)
-       CREATE_COMM_PAGE_SYMBOL(___sys_dcache_flush, _COMM_PAGE_FLUSH_DCACHE)
-       CREATE_COMM_PAGE_SYMBOL(___sys_icache_invalidate, _COMM_PAGE_FLUSH_ICACHE)
-       CREATE_COMM_PAGE_SYMBOL(___pthread_self, _COMM_PAGE_PTHREAD_SELF)
-       CREATE_COMM_PAGE_SYMBOL(___spin_lock_relinquish, _COMM_PAGE_RELINQUISH)
-       CREATE_COMM_PAGE_SYMBOL(___bit_test_and_set, _COMM_PAGE_BTS)
-       CREATE_COMM_PAGE_SYMBOL(___bit_test_and_clear, _COMM_PAGE_BTC)
-       CREATE_COMM_PAGE_SYMBOL(___bzero, _COMM_PAGE_BZERO)
-       CREATE_COMM_PAGE_SYMBOL(___bcopy, _COMM_PAGE_BCOPY)
-       CREATE_COMM_PAGE_SYMBOL(___memcpy, _COMM_PAGE_MEMCPY)
-//     CREATE_COMM_PAGE_SYMBOL(___memmove, _COMM_PAGE_MEMMOVE)
-       CREATE_COMM_PAGE_SYMBOL(___bigcopy, _COMM_PAGE_BIGCOPY)
-       CREATE_COMM_PAGE_SYMBOL(___nanotime, _COMM_PAGE_NANOTIME)
+       .text           /* Required to make a well behaved symbol file */
+
+       CREATE_COMM_PAGE_SYMBOL(___preempt, _COMM_PAGE_PREEMPT)
+       CREATE_COMM_PAGE_SYMBOL(___backoff, _COMM_PAGE_BACKOFF)
+       CREATE_COMM_PAGE_SYMBOL(___pfz_enqueue, _COMM_PAGE_PFZ_ENQUEUE)
+       CREATE_COMM_PAGE_SYMBOL(___pfz_dequeue, _COMM_PAGE_PFZ_DEQUEUE)

        CREATE_COMM_PAGE_SYMBOL(___end_comm_page, _COMM_PAGE_END)
 
        CREATE_COMM_PAGE_SYMBOL(___end_comm_page, _COMM_PAGE_END)
 

-       .data           // Required to make a well behaved symbol file
-       .long   0       // Required to make a well behaved symbol file
+       .data           /* Required to make a well behaved symbol file */
+       .long   0       /* Required to make a well behaved symbol file */

 
 #endif /* __COMM_PAGE_SYMBOLS */
 #endif /* __ASSEMBLER__ */
 
 #endif /* __COMM_PAGE_SYMBOLS */
 #endif /* __ASSEMBLER__ */