[src/trunk]: src/sys/arch/powerpc/include - Comment the BAT bits.

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/749c9e02cfc1
branches:  trunk
changeset: 479685:749c9e02cfc1
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sat Dec 18 01:36:06 1999 +0000

description:
- Comment the BAT bits.
- Add defintions for the PowerPC 601 BATs.
- Change the BATU()/BATL() macros to be a bit more flexible; allow size,
  permissions, etc. to be specified.

diffstat:

 sys/arch/powerpc/include/bat.h |  131 ++++++++++++++++++++++++++++++++++++++--
 1 files changed, 124 insertions(+), 7 deletions(-)

diffs (146 lines):

diff -r be3645a583fe -r 749c9e02cfc1 sys/arch/powerpc/include/bat.h
--- a/sys/arch/powerpc/include/bat.h    Sat Dec 18 01:34:15 1999 +0000
+++ b/sys/arch/powerpc/include/bat.h    Sat Dec 18 01:36:06 1999 +0000
@@ -1,4 +1,40 @@
-/*     $NetBSD: bat.h,v 1.1 1996/09/30 16:34:20 ws Exp $       */
+/*     $NetBSD: bat.h,v 1.2 1999/12/18 01:36:06 thorpej 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the NetBSD
+ *     Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation 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 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.
@@ -39,13 +75,94 @@
        u_int32_t batl;
 };
 
-#define        BATU(vaddr)             (((vaddr)&0xf0000000)|0x1ffe)
-#define        BATL(raddr,wimg)        (((raddr)&0xf0000000)|(wimg)|0x2)
+/* 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))
+
 
-#define        BAT_W           0x40
-#define        BAT_I           0x20
-#define        BAT_M           0x10
-#define        BAT_G           0x08
+/* 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))
 
 #ifdef _KERNEL
 extern struct bat battable[16];