FreeBSD/Linux Kernel Cross Reference
sys/sparc64/include/param.h

     /*-
      * Copyright (c) 1990 The Regents of the University of California.
      * All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * William Jolitz.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      from: @(#)param.h       5.8 (Berkeley) 6/28/91
     * $FreeBSD: releng/8.2/sys/sparc64/include/param.h 198728 2009-10-31 18:54:26Z alc $
     */
    
    /*
     * Machine dependent constants for sparc64.
     */
    
    /*
     * Round p (pointer or byte index) up to a correctly-aligned value
     * for all data types (int, long, ...).   The result is unsigned int
     * and must be cast to any desired pointer type.
     */
    #ifndef _ALIGNBYTES
    #define _ALIGNBYTES     0xf
    #endif
    #ifndef _ALIGN
    #define _ALIGN(p)       (((u_long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
    #endif
    
    #ifndef _NO_NAMESPACE_POLLUTION
    
    #define __PCI_BAR_ZERO_VALID
    
    #ifndef _MACHINE_PARAM_H_
    #define _MACHINE_PARAM_H_
    
    #ifndef MACHINE
    #define MACHINE         "sparc64"
    #endif
    #ifndef MACHINE_ARCH
    #define MACHINE_ARCH    "sparc64"
    #endif
    #define MID_MACHINE     MID_SPARC64
    
    #if defined(SMP) || defined(KLD_MODULE)
    #define MAXCPU          16
    #else
    #define MAXCPU          1
    #endif /* SMP || KLD_MODULE */
    
    #define INT_SHIFT       2
    #define PTR_SHIFT       3
    
    #define ALIGNBYTES      _ALIGNBYTES
    #define ALIGN(p)        _ALIGN(p)
    /*
     * ALIGNED_POINTER is a boolean macro that checks whether an address
     * is valid to fetch data elements of type t from on this architecture.
     * This does not reflect the optimal alignment, just the possibility
     * (within reasonable limits). 
     */
    #define ALIGNED_POINTER(p, t)   ((((u_long)(p)) & (sizeof (t) - 1)) == 0)
    
    /*
     * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
     * architecture.  It should be used with appropriate caution.
     */
    #define CACHE_LINE_SHIFT        7
    #define CACHE_LINE_SIZE         (1 << CACHE_LINE_SHIFT)
    
    #define PAGE_SHIFT_8K   13
    #define PAGE_SIZE_8K    (1L<<PAGE_SHIFT_8K)
    #define PAGE_MASK_8K    (PAGE_SIZE_8K-1)
    
    #define PAGE_SHIFT_64K  16
    #define PAGE_SIZE_64K   (1L<<PAGE_SHIFT_64K)
    #define PAGE_MASK_64K   (PAGE_SIZE_64K-1)
    
    #define PAGE_SHIFT_512K 19
    #define PAGE_SIZE_512K  (1L<<PAGE_SHIFT_512K)
   #define PAGE_MASK_512K  (PAGE_SIZE_512K-1)
   
   #define PAGE_SHIFT_4M   22
   #define PAGE_SIZE_4M    (1L<<PAGE_SHIFT_4M)
   #define PAGE_MASK_4M    (PAGE_SIZE_4M-1)
   
   #define PAGE_SHIFT_32M  25
   #define PAGE_SIZE_32M   (1L<<PAGE_SHIFT_32M)
   #define PAGE_MASK_32M   (PAGE_SIZE_32M-1)
   
   #define PAGE_SHIFT_256M 28
   #define PAGE_SIZE_256M  (1L<<PAGE_SHIFT_256M)
   #define PAGE_MASK_256M  (PAGE_SIZE_256M-1)
   
   #define PAGE_SHIFT_MIN  PAGE_SHIFT_8K
   #define PAGE_SIZE_MIN   PAGE_SIZE_8K
   #define PAGE_MASK_MIN   PAGE_MASK_8K
   #define PAGE_SHIFT      PAGE_SHIFT_8K   /* LOG2(PAGE_SIZE) */
   #define PAGE_SIZE       PAGE_SIZE_8K    /* bytes/page */
   #define PAGE_MASK       PAGE_MASK_8K
   #define PAGE_SHIFT_MAX  PAGE_SHIFT_4M
   #define PAGE_SIZE_MAX   PAGE_SIZE_4M
   #define PAGE_MASK_MAX   PAGE_MASK_4M
   
   #define MAXPAGESIZES    1               /* maximum number of supported page sizes */
   
   #ifndef KSTACK_PAGES
   #define KSTACK_PAGES            4       /* pages of kernel stack (with pcb) */
   #endif
   #define KSTACK_GUARD_PAGES      1       /* pages of kstack guard; 0 disables */
   #define PCPU_PAGES              1
   
   /*
    * Ceiling on size of buffer cache (really only effects write queueing,
    * the VM page cache is not effected), can be changed via
    * the kern.maxbcache /boot/loader.conf variable.
    */
   #ifndef VM_BCACHE_SIZE_MAX
   #define VM_BCACHE_SIZE_MAX      (400 * 1024 * 1024)
   #endif
   
   /*
    * Mach derived conversion macros
    */
   #define round_page(x)           (((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
   #define trunc_page(x)           ((unsigned long)(x) & ~PAGE_MASK)
   
   #define atop(x)                 ((unsigned long)(x) >> PAGE_SHIFT)
   #define ptoa(x)                 ((unsigned long)(x) << PAGE_SHIFT)
   
   #define sparc64_btop(x)         ((unsigned long)(x) >> PAGE_SHIFT)
   #define sparc64_ptob(x)         ((unsigned long)(x) << PAGE_SHIFT)
   
   #define pgtok(x)                ((unsigned long)(x) * (PAGE_SIZE / 1024))
   
   #endif /* !_MACHINE_PARAM_H_ */
   #endif /* !_NO_NAMESPACE_POLLUTION */

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