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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-NetBSD AND BSD-4-Clause
      *
      * Copyright (c) 1999 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jason R. Thorpe.
      *
     * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    /*-
     * Copyright (C) 1995, 1996 Wolfgang Solfrank.
     * Copyright (C) 1995, 1996 TooLs GmbH.
     * All rights reserved.
     *
     * 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 TooLs GmbH.
     * 4. The name of TooLs GmbH may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
     *
     *      $NetBSD: bat.h,v 1.2 1999/12/18 01:36:06 thorpej Exp $
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_BAT_H_
    #define _MACHINE_BAT_H_
    
    #ifndef LOCORE
    struct bat {
            u_int32_t batu;
            u_int32_t batl;
    };
    #endif
    
    /* Lower BAT bits (all but PowerPC 601): */
    #define BAT_PBS         0xfffe0000      /* physical block start */
    #define BAT_W           0x00000040      /* 1 = write-through, 0 = write-back */
    #define BAT_I           0x00000020      /* cache inhibit */
    #define BAT_M           0x00000010      /* memory coherency enable */
    #define BAT_G           0x00000008      /* guarded region */
    
    #define BAT_PP_NONE     0x00000000      /* no access permission */
    #define BAT_PP_RO_S     0x00000001      /* read-only (soft) */
    #define BAT_PP_RW       0x00000002      /* read/write */
    #define BAT_PP_RO       0x00000003      /* read-only */
    
    /* Upper BAT bits (all but PowerPC 601): */
    #define BAT_EBS         0xfffe0000      /* effective block start */
    #define BAT_BL          0x00001ffc      /* block length */
    #define BAT_Vs          0x00000002      /* valid in supervisor mode */
    #define BAT_Vu          0x00000001      /* valid in user mode */
    
    #define BAT_V           (BAT_Vs|BAT_Vu)
    
    /* Block Length encoding (all but PowerPC 601): */
    #define BAT_BL_128K     0x00000000
    #define BAT_BL_256K     0x00000004
    #define BAT_BL_512K     0x0000000c
   #define BAT_BL_1M       0x0000001c
   #define BAT_BL_2M       0x0000003c
   #define BAT_BL_4M       0x0000007c
   #define BAT_BL_8M       0x000000fc
   #define BAT_BL_16M      0x000001fc
   #define BAT_BL_32M      0x000003fc
   #define BAT_BL_64M      0x000007fc
   #define BAT_BL_128M     0x00000ffc
   #define BAT_BL_256M     0x00001ffc
   
   #define BATU(va, len, v)                                                \
           (((va) & BAT_EBS) | ((len) & BAT_BL) | ((v) & BAT_V))
   
   #define BATL(pa, wimg, pp)                                              \
           (((pa) & BAT_PBS) | (wimg) | (pp))
   
   /* Lower BAT bits (PowerPC 601): */
   #define BAT601_PBN      0xfffe0000      /* physical block number */
   #define BAT601_V        0x00000040      /* valid */
   #define BAT601_BSM      0x0000003f      /* block size mask */
   
   /* Upper BAT bits (PowerPC 601): */
   #define BAT601_BLPI     0xfffe0000      /* block logical page index */
   #define BAT601_W        0x00000040      /* 1 = write-through, 0 = write-back */
   #define BAT601_I        0x00000020      /* cache inhibit */
   #define BAT601_M        0x00000010      /* memory coherency enable */
   #define BAT601_Ks       0x00000008      /* key-supervisor */
   #define BAT601_Ku       0x00000004      /* key-user */
   
   /*
    * Permission bits on the PowerPC 601 are modified by the appropriate
    * Key bit:
    *
    *      Key     PP      Access
    *      0       NONE    read/write
    *      0       RO_S    read/write
    *      0       RW      read/write
    *      0       RO      read-only
    *
    *      1       NONE    none
    *      1       RO_S    read-only
    *      1       RW      read/write
    *      1       RO      read-only
    */
   #define BAT601_PP_NONE  0x00000000      /* no access permission */
   #define BAT601_PP_RO_S  0x00000001      /* read-only (soft) */
   #define BAT601_PP_RW    0x00000002      /* read/write */
   #define BAT601_PP_RO    0x00000003      /* read-only */
   
   /* Block Size Mask encoding (PowerPC 601): */
   #define BAT601_BSM_128K 0x00000000
   #define BAT601_BSM_256K 0x00000001
   #define BAT601_BSM_512K 0x00000003
   #define BAT601_BSM_1M   0x00000007
   #define BAT601_BSM_2M   0x0000000f
   #define BAT601_BSM_4M   0x0000001f
   #define BAT601_BSM_8M   0x0000003f
   
   #define BATU601(va, wim, key, pp)                                       \
           (((va) & BAT601_BLPI) | (wim) | (key) | (pp))
   
   #define BATL601(pa, size, v)                                            \
           (((pa) & BAT601_PBN) | (v) | (size))
   
   #if defined(_KERNEL) && !defined(LOCORE)
   extern struct bat battable[16];
   #endif
   
   #endif  /* _MACHINE_BAT_H_ */

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