mn10300: add the MN10300/AM33 architecture to the kernel

Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.

This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305.  The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.

[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/mn10300/lib/__ashrdi3.S b/arch/mn10300/lib/__ashrdi3.S
new file mode 100644
index 000000000000..6f42382728cb
--- /dev/null
+++ b/arch/mn10300/lib/__ashrdi3.S
@@ -0,0 +1,52 @@
+/* MN10300 64-bit arithmetic right shift
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <asm/cache.h>
+
+        .text
+        .balign L1_CACHE_BYTES
+
+###############################################################################
+#
+# unsigned long long __ashrdi3(unsigned long long value [D1:D0],
+#                              unsigned by [(12,SP)])
+#
+###############################################################################
+        .globl  __ashrdi3
+        .type   __ashrdi3,@function
+__ashrdi3:
+        mov     (12,sp),a0
+        and     +63,a0
+        beq     __ashrdi3_zero
+
+        cmp     +31,a0
+        bhi     __ashrdi3_32plus
+
+        # the count is in the range 1-31
+        lsr     a0,d0
+
+        mov     +32,a1
+        sub     a0,a1,a1                        # a1 = 32 - count
+        asl     a1,d1,a1                        # get underflow from MSW -> LSW
+
+        or_asr  a1,d0,a0,d1                     # insert underflow into LSW and
+                                                # shift the MSW
+        rets
+
+        .balign L1_CACHE_BYTES
+        # the count is in the range 32-63
+__ashrdi3_32plus:
+        asr     a0,d1,d0
+        ext     d0                              # sign-extend result through MDR
+        mov     mdr,d1
+__ashrdi3_zero:
+        rets
+
+        .size   __ashrdi3, .-__ashrdi3