/*      $NetBSD: bat.h,v 1.20 2020/07/06 10:31:23 rin Exp $     */

/*-
* 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.
*/

#ifndef _POWERPC_OEA_BAT_H_
#define _POWERPC_OEA_BAT_H_

#if defined(_KERNEL) && !defined(_LOCORE)

#ifdef _KERNEL_OPT
#include "opt_ppcarch.h"
#endif

#include <powerpc/psl.h>

struct bat {
       register_t batu;
       register_t batl;
} __aligned(8);
#endif

/* Lower BAT bits (all but PowerPC 601): */
#define BAT_RPN         (~0x1ffff)      /* physical block start */
#define BAT_XPN         0x00000e00      /* eXtended physical page number (0-2) */
#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 (not on 601) */
#define BAT_X           0x00000004      /* eXtended physical page number (3) */
#define BAT_WIMG        0x00000078      /* WIMG mask */

/*
* BAT_XPN and BAT_X are only used when HID0[XAEN] == 1 and are used
* to generate the 4 MSB of physical address
*/

#define BAT_PP          0x00000003      /* PP mask */
#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_EPI         (~0x1ffffL)     /* 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_XBL         0x0001e000      /* eXtended Block Length (*) */
#define BAT_XBL_512M    0x00002000      /* XBL for 512MB */
#define BAT_XBL_1G      0x00006000      /* XBL for 1GB */
#define BAT_XBL_2G      0x0000e000      /* XBL for 2GB */
#define BAT_XBL_4G      0x0001e000      /* XBL for 4GB */

#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
/* Extended Block Lengths (7455+) */
#define BAT_BL_512M     0x00003ffc
#define BAT_BL_1G       0x00007ffc
#define BAT_BL_2G       0x0000fffc
#define BAT_BL_4G       0x0001fffc

#define BAT_BL_TO_SIZE(bl)      (((bl)+4) << 15)

#define BATU(va, len, v)                                                \
       (((va) & BAT_EPI) | ((len) & (BAT_BL|BAT_XBL)) | ((v) & BAT_V))

#define BATL(pa, wimg, pp)                                              \
       (((pa) & BAT_RPN) | (wimg) | (pp))

#define BAT_VA_MATCH_P(batu,va) \
 (((~(((batu)&(BAT_BL|BAT_XBL))<<15))&(va)&BAT_EPI)==((batu)&BAT_EPI))

#define BAT_PA_MATCH_P(batu,batl,pa) \
 (((~(((batu)&(BAT_BL|BAT_XBL))<<15))&(pa)&BAT_RPN)==((batl)&BAT_RPN))

#define BAT_VALID_P(batu, msr) \
 (((msr)&PSL_PR)?(((batu)&BAT_Vu)==BAT_Vu):(((batu)&BAT_Vs)==BAT_Vs))

/* 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       0x00000003
#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))

#define BAT601_VA_MATCH_P(batu, batl, va)                               \
       (((~(((batl)&BAT601_BSM)<<17))&(va)&BAT601_BLPI)==((batu)&BAT601_BLPI))

#define BAT601_VALID_P(batl) \
       ((batl) & BAT601_V)

#define BAT_VA2IDX(va)  ((va) / (8*1024*1024))
#define BAT_IDX2VA(i)   ((i) * (8*1024*1024))

#if defined(_KERNEL) && !defined(_LOCORE)
void oea_batinit(paddr_t, ...);
void oea_iobat_add(paddr_t, register_t);
void oea_iobat_remove(paddr_t);

#if !defined (PPC_OEA64)
extern struct bat battable[];
#endif /* PPC_OEA */
#endif

#endif  /* _POWERPC_OEA_BAT_H_ */

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