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, 229 insertions, 0 deletions

diff --git a/include/asm-mn10300/bitops.h b/include/asm-mn10300/bitops.h
new file mode 100644
index 000000000000..cc6d40c05cf3
--- /dev/null
+++ b/include/asm-mn10300/bitops.h
@@ -0,0 +1,229 @@
+/* MN10300 bit operations
+ *
+ * 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.
+ *
+ * These have to be done with inline assembly: that way the bit-setting
+ * is guaranteed to be atomic. All bit operations return 0 if the bit
+ * was cleared before the operation and != 0 if it was not.
+ *
+ * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
+ */
+#ifndef __ASM_BITOPS_H
+#define __ASM_BITOPS_H
+
+#include <asm/cpu-regs.h>
+
+#define smp_mb__before_clear_bit()	barrier()
+#define smp_mb__after_clear_bit()	barrier()
+
+/*
+ * set bit
+ */
+#define __set_bit(nr, addr)					\
+({								\
+	volatile unsigned char *_a = (unsigned char *)(addr);	\
+	const unsigned shift = (nr) & 7;			\
+	_a += (nr) >> 3;					\
+								\
+	asm volatile("bset %2,(%1) # set_bit reg"		\
+		     : "=m"(*_a)				\
+		     : "a"(_a), "d"(1 << shift),  "m"(*_a)	\
+		     : "memory", "cc");				\
+})
+
+#define set_bit(nr, addr) __set_bit((nr), (addr))
+
+/*
+ * clear bit
+ */
+#define ___clear_bit(nr, addr)					\
+({								\
+	volatile unsigned char *_a = (unsigned char *)(addr);	\
+	const unsigned shift = (nr) & 7;			\
+	_a += (nr) >> 3;					\
+								\
+	asm volatile("bclr %2,(%1) # clear_bit reg"		\
+		     : "=m"(*_a)				\
+		     : "a"(_a), "d"(1 << shift), "m"(*_a)	\
+		     : "memory", "cc");				\
+})
+
+#define clear_bit(nr, addr) ___clear_bit((nr), (addr))
+
+
+static inline void __clear_bit(int nr, volatile void *addr)
+{
+	unsigned int *a = (unsigned int *) addr;
+	int mask;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	*a &= ~mask;
+}
+
+/*
+ * test bit
+ */
+static inline int test_bit(int nr, const volatile void *addr)
+{
+	return 1UL & (((const unsigned int *) addr)[nr >> 5] >> (nr & 31));
+}
+
+/*
+ * change bit
+ */
+static inline void __change_bit(int nr, volatile void *addr)
+{
+	int	mask;
+	unsigned int *a = (unsigned int *) addr;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	*a ^= mask;
+}
+
+extern void change_bit(int nr, volatile void *addr);
+
+/*
+ * test and set bit
+ */
+#define __test_and_set_bit(nr,addr)				\
+({								\
+	volatile unsigned char *_a = (unsigned char *)(addr);	\
+	const unsigned shift = (nr) & 7;			\
+	unsigned epsw;						\
+	_a += (nr) >> 3;					\
+								\
+	asm volatile("bset %3,(%2) # test_set_bit reg\n"	\
+		     "mov epsw,%1"				\
+		     : "=m"(*_a), "=d"(epsw)			\
+		     : "a"(_a), "d"(1 << shift), "m"(*_a)	\
+		     : "memory", "cc");				\
+								\
+	!(epsw & EPSW_FLAG_Z);					\
+})
+
+#define test_and_set_bit(nr, addr) __test_and_set_bit((nr), (addr))
+
+/*
+ * test and clear bit
+ */
+#define __test_and_clear_bit(nr, addr)				\
+({								\
+        volatile unsigned char *_a = (unsigned char *)(addr);	\
+	const unsigned shift = (nr) & 7;			\
+	unsigned epsw;						\
+	_a += (nr) >> 3;					\
+								\
+	asm volatile("bclr %3,(%2) # test_clear_bit reg\n"	\
+		     "mov epsw,%1"				\
+		     : "=m"(*_a), "=d"(epsw)			\
+		     : "a"(_a), "d"(1 << shift), "m"(*_a)	\
+		     : "memory", "cc");				\
+								\
+	!(epsw & EPSW_FLAG_Z);					\
+})
+
+#define test_and_clear_bit(nr, addr) __test_and_clear_bit((nr), (addr))
+
+/*
+ * test and change bit
+ */
+static inline int __test_and_change_bit(int nr, volatile void *addr)
+{
+	int	mask, retval;
+	unsigned int *a = (unsigned int *)addr;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	retval = (mask & *a) != 0;
+	*a ^= mask;
+
+	return retval;
+}
+
+extern int test_and_change_bit(int nr, volatile void *addr);
+
+#include <asm-generic/bitops/lock.h>
+
+#ifdef __KERNEL__
+
+/**
+ * __ffs - find first bit set
+ * @x: the word to search
+ *
+ * - return 31..0 to indicate bit 31..0 most least significant bit set
+ * - if no bits are set in x, the result is undefined
+ */
+static inline __attribute__((const))
+unsigned long __ffs(unsigned long x)
+{
+	int bit;
+	asm("bsch %2,%0" : "=r"(bit) : "0"(0), "r"(x & -x));
+	return bit;
+}
+
+/*
+ * special slimline version of fls() for calculating ilog2_u32()
+ * - note: no protection against n == 0
+ */
+static inline __attribute__((const))
+int __ilog2_u32(u32 n)
+{
+	int bit;
+	asm("bsch %2,%0" : "=r"(bit) : "0"(0), "r"(n));
+	return bit;
+}
+
+/**
+ * fls - find last bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs:
+ * - return 32..1 to indicate bit 31..0 most significant bit set
+ * - return 0 to indicate no bits set
+ */
+static inline __attribute__((const))
+int fls(int x)
+{
+	return (x != 0) ? __ilog2_u32(x) + 1 : 0;
+}
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ *
+ * - return 32..1 to indicate bit 31..0 most least significant bit set
+ * - return 0 to indicate no bits set
+ */
+static inline __attribute__((const))
+int ffs(int x)
+{
+	/* Note: (x & -x) gives us a mask that is the least significant
+	 * (rightmost) 1-bit of the value in x.
+	 */
+	return fls(x & -x);
+}
+
+#include <asm-generic/bitops/ffz.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/hweight.h>
+
+#define ext2_set_bit_atomic(lock, nr, addr) \
+	test_and_set_bit((nr) ^ 0x18, (addr))
+#define ext2_clear_bit_atomic(lock, nr, addr) \
+	test_and_clear_bit((nr) ^ 0x18, (addr))
+
+#include <asm-generic/bitops/ext2-non-atomic.h>
+#include <asm-generic/bitops/minix-le.h>
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_BITOPS_H */