[coldfire]: 2.6.31 support (WiP)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24087 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 443 insertions, 0 deletions

diff --git a/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_bitops.h b/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_bitops.h
new file mode 100644
index 0000000000..6f9e9c0990
--- /dev/null
+++ b/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_bitops.h
@@ -0,0 +1,443 @@
+/* 
+ * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+#ifndef __CF_BITOPS__
+#define __CF_BITOPS__
+
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
+#include <linux/compiler.h>
+
+#define test_and_set_bit(nr,vaddr)			\
+  (__builtin_constant_p(nr) ?				\
+   __constant_coldfire_test_and_set_bit(nr, vaddr) :	\
+   __generic_coldfire_test_and_set_bit(nr, vaddr))
+
+static __inline__ int __constant_coldfire_test_and_set_bit(int nr,
+	volatile void *vaddr)
+{
+	char retval;
+	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+	__asm__ __volatile__ ("bset %2,(%4); sne %0"
+	     : "=d" (retval), "=m" (*p)
+	     : "di" (nr & 7), "m" (*p), "a" (p));
+	return retval;
+}
+
+static __inline__ int __generic_coldfire_test_and_set_bit(int nr,
+	volatile void *vaddr)
+{
+	char retval;
+
+	__asm__ __volatile__ ("bset %2,%1; sne %0"
+	     : "=d" (retval), "=m" (((volatile char *)vaddr)[(nr^31) >> 3])
+	     : "d" (nr)
+	     : "memory");
+	return retval;
+}
+#define __test_and_set_bit(nr, vaddr) test_and_set_bit(nr, vaddr)
+
+#define set_bit(nr,vaddr)			\
+  (__builtin_constant_p(nr) ?			\
+   __constant_coldfire_set_bit(nr, vaddr) :	\
+   __generic_coldfire_set_bit(nr, vaddr))
+
+static __inline__ void __constant_coldfire_set_bit(int nr,
+	volatile void *vaddr)
+{
+	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+	__asm__ __volatile__ ("bset %1,(%3)"
+	     : "=m" (*p) : "di" (nr & 7), "m" (*p), "a" (p));
+}
+
+static __inline__ void __generic_coldfire_set_bit(int nr,
+	volatile void *vaddr)
+{
+	__asm__ __volatile__ ("bset %1,%0"
+	     : "=m" (((volatile char *)vaddr)[(nr^31) >> 3])
+	     : "d" (nr)
+	     : "memory");
+}
+#define __set_bit(nr, vaddr) set_bit(nr, vaddr)
+
+#define test_and_clear_bit(nr, vaddr)			\
+  (__builtin_constant_p(nr) ?				\
+   __constant_coldfire_test_and_clear_bit(nr, vaddr) :	\
+   __generic_coldfire_test_and_clear_bit(nr, vaddr))
+
+static __inline__ int __constant_coldfire_test_and_clear_bit(int nr,
+	volatile void *vaddr)
+{
+	char retval;
+	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+
+	__asm__ __volatile__ ("bclr %2,(%4); sne %0"
+	     : "=d" (retval), "=m" (*p)
+	     : "id" (nr & 7), "m" (*p), "a" (p));
+
+	return retval;
+}
+
+static __inline__ int __generic_coldfire_test_and_clear_bit(int nr,
+	volatile void *vaddr)
+{
+	char retval;
+
+	__asm__ __volatile__ ("bclr %2,%1; sne %0"
+	     : "=d" (retval), "=m" (((volatile char *)vaddr)[(nr^31) >> 3])
+	     : "d" (nr & 7)
+	     : "memory");
+
+	return retval;
+}
+#define __test_and_clear_bit(nr, vaddr) test_and_clear_bit(nr, vaddr)
+
+/*
+ * clear_bit() doesn't provide any barrier for the compiler.
+ */
+#define smp_mb__before_clear_bit()	barrier()
+#define smp_mb__after_clear_bit()	barrier()
+
+#define clear_bit(nr,vaddr)			\
+  (__builtin_constant_p(nr) ?			\
+   __constant_coldfire_clear_bit(nr, vaddr) :	\
+   __generic_coldfire_clear_bit(nr, vaddr))
+
+static __inline__ void __constant_coldfire_clear_bit(int nr,
+	volatile void *vaddr)
+{
+	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+	__asm__ __volatile__ ("bclr %1,(%3)"
+	     : "=m" (*p) : "id" (nr & 7), "m" (*p), "a" (p));
+}
+
+static __inline__ void __generic_coldfire_clear_bit(int nr,
+	volatile void *vaddr)
+{
+	__asm__ __volatile__ ("bclr %1,%0"
+	     : "=m" (((volatile char *)vaddr)[(nr^31) >> 3])
+	     : "d" (nr)
+	     : "memory");
+}
+#define __clear_bit(nr, vaddr) clear_bit(nr, vaddr)
+
+#define test_and_change_bit(nr, vaddr)			\
+  (__builtin_constant_p(nr) ?				\
+   __constant_coldfire_test_and_change_bit(nr, vaddr) :	\
+   __generic_coldfire_test_and_change_bit(nr, vaddr))
+
+static __inline__ int __constant_coldfire_test_and_change_bit(int nr,
+	volatile void *vaddr)
+{
+	char retval;
+	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+
+	__asm__ __volatile__ ("bchg %2,(%4); sne %0"
+	     : "=d" (retval), "=m" (*p)
+	     : "id" (nr & 7), "m" (*p), "a" (p));
+
+	return retval;
+}
+
+static __inline__ int __generic_coldfire_test_and_change_bit(int nr,
+	volatile void *vaddr)
+{
+	char retval;
+
+	__asm__ __volatile__ ("bchg %2,%1; sne %0"
+	     : "=d" (retval), "=m" (((volatile char *)vaddr)[(nr^31) >> 3])
+	     : "id" (nr)
+	     : "memory");
+
+	return retval;
+}
+#define __test_and_change_bit(nr, vaddr) test_and_change_bit(nr, vaddr)
+#define __change_bit(nr, vaddr) change_bit(nr, vaddr)
+
+#define change_bit(nr,vaddr)			\
+  (__builtin_constant_p(nr) ?			\
+   __constant_coldfire_change_bit(nr, vaddr) :	\
+   __generic_coldfire_change_bit(nr, vaddr))
+
+static __inline__ void __constant_coldfire_change_bit(int nr,
+	volatile void *vaddr)
+{
+	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
+	__asm__ __volatile__ ("bchg %1,(%3)"
+	     : "=m" (*p) : "id" (nr & 7), "m" (*p), "a" (p));
+}
+
+static __inline__ void __generic_coldfire_change_bit(int nr,
+	volatile void *vaddr)
+{
+	__asm__ __volatile__ ("bchg %1,%0"
+	     : "=m" (((volatile char *)vaddr)[(nr^31) >> 3])
+	     : "d" (nr)
+	     : "memory");
+}
+
+static inline int test_bit(int nr, const unsigned long *vaddr)
+{
+	return (vaddr[nr >> 5] & (1UL << (nr & 31))) != 0;
+}
+
+static __inline__ unsigned long ffz(unsigned long word)
+{
+	unsigned long result = 0;
+
+	while (word & 1) {
+		result++;
+		word >>= 1;
+	}
+	return result;
+}
+
+/* find_next_zero_bit() finds the first zero bit in a bit string of length
+ * 'size' bits, starting the search at bit 'offset'.  This is largely based
+ * on Linus's ALPHA routines.
+ */
+static __inline__ unsigned long find_next_zero_bit(void *addr,
+	unsigned long size, unsigned long offset)
+{
+	unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
+	unsigned long result = offset & ~31UL;
+	unsigned long tmp;
+
+	if (offset >= size)
+		return size;
+	size -= result;
+	offset &= 31UL;
+	if (offset) {
+		tmp = *(p++);
+		tmp |= ~0UL >> (32-offset);
+		if (size < 32)
+			goto found_first;
+		if (~tmp)
+			goto found_middle;
+		size -= 32;
+		result += 32;
+	}
+	while (size & ~31UL) {
+		tmp = *(p++);
+		if (~tmp)
+			goto found_middle;
+		result += 32;
+		size -= 32;
+	}
+	if (!size)
+		return result;
+	tmp = *p;
+
+found_first:
+	tmp |= ~0UL >> size;
+found_middle:
+	return result + ffz(tmp);
+}
+
+#define find_first_zero_bit(addr, size) find_next_zero_bit(((void *)addr), \
+		(size), 0)
+
+/* Ported from included/linux/bitops.h  */
+static __inline__ int ffs(int x)
+{
+	int r = 1;
+
+	if (!x)
+		return 0;
+	if (!(x & 0xffff)) {
+		x >>= 16;
+		r += 16;
+	}
+	if (!(x & 0xff)) {
+		x >>= 8;
+		r += 8;
+	}
+	if (!(x & 0xf)) {
+		x >>= 4;
+		r += 4;
+	}
+	if (!(x & 3)) {
+		x >>= 2;
+		r += 2;
+	}
+	if (!(x & 1)) {
+		x >>= 1;
+		r += 1;
+	}
+	return r;
+}
+#define __ffs(x) (ffs(x) - 1)
+
+/* find_next_bit - find the next set bit in a memory region
+ * (from asm-ppc/bitops.h)
+ */
+static __inline__ unsigned long find_next_bit(const unsigned long *addr,
+	unsigned long size, unsigned long offset)
+{
+	unsigned int *p = ((unsigned int *) addr) + (offset >> 5);
+	unsigned int result = offset & ~31UL;
+	unsigned int tmp;
+
+	if (offset >= size)
+		return size;
+	size -= result;
+	offset &= 31UL;
+	if (offset) {
+		tmp = *p++;
+		tmp &= ~0UL << offset;
+		if (size < 32)
+			goto found_first;
+		if (tmp)
+			goto found_middle;
+		size -= 32;
+		result += 32;
+	}
+	while (size >= 32) {
+		tmp = *p++;
+		if (tmp != 0)
+			goto found_middle;
+		result += 32;
+		size -= 32;
+	}
+	if (!size)
+		return result;
+	tmp = *p;
+
+found_first:
+	tmp &= ~0UL >> (32 - size);
+	if (tmp == 0UL)        /* Are any bits set? */
+		return result + size; /* Nope. */
+found_middle:
+	return result + __ffs(tmp);
+}
+
+#define find_first_bit(addr, size) find_next_bit((addr), (size), 0)
+
+#ifdef __KERNEL__
+
+/* Ported from include/linux/bitops.h */
+static  __inline__ int fls(int x)
+{
+	int r = 32;
+
+	if (!x)
+		return 0;
+	if (!(x & 0xffff0000u)) {
+		x <<= 16;
+		r -= 16;
+	}
+	if (!(x & 0xff000000u)) {
+		x <<= 8;
+		r -= 8;
+	}
+	if (!(x & 0xf0000000u)) {
+		x <<= 4;
+		r -= 4;
+	}
+	if (!(x & 0xc0000000u)) {
+		x <<= 2;
+		r -= 2;
+	}
+	if (!(x & 0x80000000u)) {
+		x <<= 1;
+		r -= 1;
+	}
+	return r;
+}
+
+static inline int __fls(int x)
+{
+	return fls(x) - 1;
+}
+
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
+
+#define minix_find_first_zero_bit(addr, size)	find_next_zero_bit((addr), \
+							(size), 0)
+#define minix_test_and_set_bit(nr, addr)	test_and_set_bit((nr), \
+							(unsigned long *)(addr))
+#define minix_set_bit(nr, addr)			set_bit((nr), \
+							(unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr, addr)	test_and_clear_bit((nr), \
+							(unsigned long *)(addr))
+
+static inline int minix_test_bit(int nr, const volatile unsigned long *vaddr)
+{
+	int 	*a = (int *)vaddr;
+	int	mask;
+
+	a += nr >> 5;
+	mask = 1 << (nr & 0x1f);
+	return ((mask & *a) != 0);
+}
+
+#define ext2_set_bit(nr, addr)			test_and_set_bit((nr) ^ 24, \
+							(unsigned long *)(addr))
+#define ext2_set_bit_atomic(lock, nr, addr)	test_and_set_bit((nr) ^ 24, \
+							(unsigned long *)(addr))
+#define ext2_clear_bit(nr, addr)		test_and_clear_bit((nr) ^ 24, \
+							(unsigned long *)(addr))
+#define ext2_clear_bit_atomic(lock, nr, addr)	test_and_clear_bit((nr) ^ 24, \
+							(unsigned long *)(addr))
+
+static inline int ext2_test_bit(int nr, const void *vaddr)
+{
+	const unsigned char *p = vaddr;
+	return (p[nr >> 3] & (1U << (nr & 7))) != 0;
+}
+
+static inline int ext2_find_first_zero_bit(const void *vaddr, unsigned size)
+{
+	const unsigned long *p = vaddr, *addr = vaddr;
+	int res;
+
+	if (!size)
+		return 0;
+
+	size = (size >> 5) + ((size & 31) > 0);
+	while (*p++ == ~0UL) {
+		if (--size == 0)
+			return (p - addr) << 5;
+	}
+
+	--p;
+	for (res = 0; res < 32; res++)
+		if (!ext2_test_bit (res, p))
+			break;
+	return (p - addr) * 32 + res;
+}
+
+static inline int ext2_find_next_zero_bit(const void *vaddr, unsigned size,
+					  unsigned offset)
+{
+	const unsigned long *addr = vaddr;
+	const unsigned long *p = addr + (offset >> 5);
+	int bit = offset & 31UL, res;
+
+	if (offset >= size)
+		return size;
+
+	if (bit) {
+		/* Look for zero in first longword */
+		for (res = bit; res < 32; res++)
+			if (!ext2_test_bit (res, p))
+				return (p - addr) * 32 + res;
+		p++;
+	}
+	/* No zero yet, search remaining full bytes for a zero */
+	res = ext2_find_first_zero_bit(p, size - 32 * (p - addr));
+	return (p - addr) * 32 + res;
+}
+
+#endif /* KERNEL */
+
+#endif /* __CF_BITOPS__ */