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

     /*-
      * Copyright (c) 2001 David E. O'Brien
      * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * 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/10.0/sys/arm/include/param.h 254918 2013-08-26 17:12:30Z raj $
     */
    
    #ifndef _ARM_INCLUDE_PARAM_H_
    #define _ARM_INCLUDE_PARAM_H_
    
    /*
     * Machine dependent constants for StrongARM
     */
    
    #include <machine/_align.h>
    
    #define STACKALIGNBYTES (8 - 1)
    #define STACKALIGN(p)   ((u_int)(p) & ~STACKALIGNBYTES)
    
    #define __PCI_REROUTE_INTERRUPT
    
    #ifndef MACHINE
    #define MACHINE         "arm"
    #endif
    #ifndef MACHINE_ARCH
    #if defined(__FreeBSD_ARCH_armv6__) || (defined(__ARM_ARCH) && __ARM_ARCH >= 6)
    #ifdef __ARMEB__
    #define MACHINE_ARCH    "armv6eb"
    #else
    #define MACHINE_ARCH    "armv6"
    #endif
    #else
    #ifdef __ARMEB__
    #define MACHINE_ARCH    "armeb"
    #else
    #define MACHINE_ARCH    "arm"
    #endif
    #endif
    #endif
    #define MID_MACHINE     MID_ARM6
    
    #if defined(SMP) || defined(KLD_MODULE)
    #ifndef MAXCPU
    #define MAXCPU          4
    #endif
    #else
    #define MAXCPU          1
    #endif /* SMP || KLD_MODULE */
    
    #ifndef MAXMEMDOM
    #define MAXMEMDOM       1
    #endif
    
    #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)   ((((unsigned)(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        6
   #define CACHE_LINE_SIZE         (1 << CACHE_LINE_SHIFT)
   
   #define PAGE_SHIFT      12
   #define PAGE_SIZE       (1 << PAGE_SHIFT)       /* Page size */
   #define PAGE_MASK       (PAGE_SIZE - 1)
   #define NPTEPG          (PAGE_SIZE/(sizeof (pt_entry_t)))
   
   #define PDR_SHIFT       20 /* log2(NBPDR) */
   #define NBPDR           (1 << PDR_SHIFT)
   #define PDRMASK         (NBPDR - 1)
   #define NPDEPG          (1 << (32 - PDR_SHIFT))
   
   #define MAXPAGESIZES    2               /* maximum number of supported page sizes */
   
   #ifndef KSTACK_PAGES
   #define KSTACK_PAGES    2
   #endif /* !KSTACK_PAGES */
   
   #ifndef FPCONTEXTSIZE
   #define FPCONTEXTSIZE   (0x100)
   #endif
   
   #ifndef KSTACK_GUARD_PAGES
   #define KSTACK_GUARD_PAGES      1
   #endif /* !KSTACK_GUARD_PAGES */
   
   #define USPACE_SVC_STACK_TOP            KSTACK_PAGES * PAGE_SIZE
   #define USPACE_SVC_STACK_BOTTOM         (USPACE_SVC_STACK_TOP - 0x1000)
   #define USPACE_UNDEF_STACK_TOP          (USPACE_SVC_STACK_BOTTOM - 0x10)
   #define USPACE_UNDEF_STACK_BOTTOM       (FPCONTEXTSIZE + 10)
   /*
    * Mach derived conversion macros
    */
   #define trunc_page(x)           ((x) & ~PAGE_MASK)
   #define round_page(x)           (((x) + PAGE_MASK) & ~PAGE_MASK)
   #define trunc_1mpage(x)         ((unsigned)(x) & ~PDRMASK)
   #define round_1mpage(x)         ((((unsigned)(x)) + PDRMASK) & ~PDRMASK)
   
   #define atop(x)                 ((unsigned)(x) >> PAGE_SHIFT)
   #define ptoa(x)                 ((unsigned)(x) << PAGE_SHIFT)
   
   #define arm32_btop(x)           ((unsigned)(x) >> PAGE_SHIFT)
   #define arm32_ptob(x)           ((unsigned)(x) << PAGE_SHIFT)
   
   #define pgtok(x)                ((x) * (PAGE_SIZE / 1024))
   
   #endif /* !_ARM_INCLUDE_PARAM_H_ */

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