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

     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * 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
     * $FreeBSD$
     */
    
    #ifndef _POWERPC_INCLUDE_PARAM_H_
    #define _POWERPC_INCLUDE_PARAM_H_
    
    /*
     * Machine dependent constants for PowerPC
     */
    
    #include <machine/_align.h>
    
    /* Needed to display interrupts on OFW PCI */
    #define __PCI_REROUTE_INTERRUPT
    
    #ifndef MACHINE
    #define MACHINE         "powerpc"
    #endif
    #ifndef MACHINE_ARCH
    #ifdef __powerpc64__
    #if defined(__LITTLE_ENDIAN__)
    #define MACHINE_ARCH    "powerpc64le"
    #else
    #define MACHINE_ARCH    "powerpc64"
    #endif
    #else
    #ifdef  __SPE__
    #define MACHINE_ARCH    "powerpcspe"
    #else
    #define MACHINE_ARCH    "powerpc"
    #endif
    #endif
    #endif
    #define MID_MACHINE     MID_POWERPC
    #ifdef __powerpc64__
    #ifndef MACHINE_ARCH32
    #define MACHINE_ARCH32  "powerpc"
    #endif
    #endif
    
    #ifdef SMP
    #ifndef MAXCPU
    #define MAXCPU          256
    #endif
    #else
    #define MAXCPU          1
    #endif
    
    #ifndef MAXMEMDOM
    #define MAXMEMDOM       8
    #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)   ((((uintptr_t)(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      12
   #define PAGE_SIZE       (1 << PAGE_SHIFT)       /* Page size */
   #define PAGE_MASK       (PAGE_SIZE - 1)
   #define NPTEPG          (PAGE_SIZE/(sizeof (pt_entry_t)))
   #define NPDEPG          (PAGE_SIZE/(sizeof (pt_entry_t)))
   
   #define L1_PAGE_SIZE_SHIFT 39
   #define L1_PAGE_SIZE (1UL<<L1_PAGE_SIZE_SHIFT)
   #define L1_PAGE_MASK (L1_PAGE_SIZE-1)
   
   #define L2_PAGE_SIZE_SHIFT 30
   #define L2_PAGE_SIZE (1UL<<L2_PAGE_SIZE_SHIFT)
   #define L2_PAGE_MASK (L2_PAGE_SIZE-1)
   
   #define L3_PAGE_SIZE_SHIFT 21
   #define L3_PAGE_SIZE (1UL<<L3_PAGE_SIZE_SHIFT)
   #define L3_PAGE_MASK (L3_PAGE_SIZE-1)
   
   #define MAXPAGESIZES    3       /* maximum number of supported page sizes */
   
   #define RELOCATABLE_KERNEL      1               /* kernel may relocate during startup */
   
   #ifndef KSTACK_PAGES
   #ifdef __powerpc64__
   #define KSTACK_PAGES            12              /* includes pcb */
   #else
   #define KSTACK_PAGES            4               /* includes pcb */
   #endif
   #endif
   #define KSTACK_GUARD_PAGES      1       /* pages of kstack guard; 0 disables */
   #define USPACE          (kstack_pages * PAGE_SIZE)      /* total size of pcb */
   
   #define COPYFAULT               0x1
   #define FUSUFAULT               0x2
   
   /*
    * Mach derived conversion macros
    */
   #define trunc_page(x)           ((x) & ~(PAGE_MASK))
   #define round_page(x)           (((x) + PAGE_MASK) & ~PAGE_MASK)
   #define trunc_2mpage(x)         ((unsigned long)(x) & ~L3_PAGE_MASK)
   #define round_2mpage(x)         ((((unsigned long)(x)) + L3_PAGE_MASK) & ~L3_PAGE_MASK)
   #define trunc_1gpage(x)         ((unsigned long)(x) & ~L2_PAGE_MASK)
   
   #define atop(x)                 ((x) >> PAGE_SHIFT)
   #define ptoa(x)                 ((x) << PAGE_SHIFT)
   
   #define powerpc_btop(x)         ((x) >> PAGE_SHIFT)
   #define powerpc_ptob(x)         ((x) << PAGE_SHIFT)
   
   #define pgtok(x)                ((x) * (PAGE_SIZE / 1024UL))
   
   #define btoc(x)                 ((vm_offset_t)(((x)+PAGE_MASK)>>PAGE_SHIFT))
   
   #endif /* !_POWERPC_INCLUDE_PARAM_H_ */

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