[src/trunk]: src/sys/arch/amigappc/amigappc A1200 (BPPC) BAT init.

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

details:   https://anonhg.NetBSD.org/src/rev/2baf21bfd8fa
branches:  trunk
changeset: 752744:2baf21bfd8fa
user:      phx <phx%NetBSD.org@localhost>
date:      Fri Mar 05 17:56:46 2010 +0000

description:
A1200 (BPPC) BAT init.

diffstat:

 sys/arch/amigappc/amigappc/machdep.c |  26 +++++++++++++++++++-------
 1 files changed, 19 insertions(+), 7 deletions(-)

diffs (54 lines):

diff -r d5b51fb21707 -r 2baf21bfd8fa sys/arch/amigappc/amigappc/machdep.c
--- a/sys/arch/amigappc/amigappc/machdep.c      Fri Mar 05 17:55:42 2010 +0000
+++ b/sys/arch/amigappc/amigappc/machdep.c      Fri Mar 05 17:56:46 2010 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: machdep.c,v 1.41 2010/02/05 12:05:25 phx Exp $ */
+/* $NetBSD: machdep.c,v 1.42 2010/03/05 17:56:46 phx Exp $ */
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -32,7 +32,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.41 2010/02/05 12:05:25 phx Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.42 2010/03/05 17:56:46 phx Exp $");
 
 #include "opt_ddb.h"
 #include "opt_ipkdb.h"
@@ -547,18 +547,30 @@
 
        /*
         * Initialize BAT tables.
+        * The CSPPC RAM (A3000/A4000) always starts at 0x08000000 and is
+        * up to 128MB big.
+        * The BPPC RAM (A1200) can be up to 256MB and may start at nearly
+        * any address between 0x40000000 and 0x80000000 depending on which
+        * RAM module of which size was inserted into which bank:
+        * The RAM module in bank 1 is located from 0x?8000000 downwards.
+        * The RAM module in bank 2 is located from 0x?8000000 upwards.
+        * Whether '?' is 4, 5, 6 or 7 probably depends on the size.
+        * So we have to use the 'startkernel' symbol for BAT-mapping
+        * our RAM.
         */
-       if (!is_a1200()) {
+       if (is_a1200()) {
+               amigappc_batinit(0x00000000, BAT_BL_16M, BAT_I|BAT_G,
+                   (startkernel & 0xf0000000), BAT_BL_256M, 0,
+                   0xfff00000, BAT_BL_512K, 0,
+                   ~0);
+       } else {
                /* A3000 or A4000 */
                amigappc_batinit(0x00000000, BAT_BL_16M, BAT_I|BAT_G,
-                   0x08000000, BAT_BL_128M, 0,
+                   (startkernel & 0xf8000000), BAT_BL_128M, 0,
                    0xfff00000, BAT_BL_512K, 0,
                    0x40000000, BAT_BL_256M, BAT_I|BAT_G,
                    ~0);
        }
-       else {
-               panic("A1200 BPPC batinit?");
-       }
 
        /*
         * Set up trap vectors and interrupt handler