Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 893 insertions, 0 deletions

diff --git a/include/asm-m68k/uaccess.h b/include/asm-m68k/uaccess.h
new file mode 100644
index 000000000000..605e6cb811f8
--- /dev/null
+++ b/include/asm-m68k/uaccess.h
@@ -0,0 +1,893 @@
+#ifndef __M68K_UACCESS_H
+#define __M68K_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <asm/segment.h>
+
+#define VERIFY_READ	0
+#define VERIFY_WRITE	1
+
+/* We let the MMU do all checking */
+#define access_ok(type,addr,size) 1
+
+/* this function will go away soon - use access_ok() instead */
+static inline int __deprecated verify_area(int type, const void *addr, unsigned long size)
+{
+	return access_ok(type,addr,size) ? 0 : -EFAULT;
+}
+
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue.  No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path.  This means when everything is well,
+ * we don't even have to jump over them.  Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+
+struct exception_table_entry
+{
+	unsigned long insn, fixup;
+};
+
+
+/*
+ * These are the main single-value transfer routines.  They automatically
+ * use the right size if we just have the right pointer type.
+ */
+
+#define put_user(x, ptr)				\
+({							\
+    int __pu_err;					\
+    typeof(*(ptr)) __pu_val = (x);			\
+    switch (sizeof (*(ptr))) {				\
+    case 1:						\
+	__put_user_asm(__pu_err, __pu_val, ptr, b);	\
+	break;						\
+    case 2:						\
+	__put_user_asm(__pu_err, __pu_val, ptr, w);	\
+	break;						\
+    case 4:						\
+	__put_user_asm(__pu_err, __pu_val, ptr, l);	\
+	break;						\
+    case 8:                                             \
+       __pu_err = __constant_copy_to_user(ptr, &__pu_val, 8);        \
+       break;                                           \
+    default:						\
+	__pu_err = __put_user_bad();			\
+	break;						\
+    }							\
+    __pu_err;						\
+})
+#define __put_user(x, ptr) put_user(x, ptr)
+
+extern int __put_user_bad(void);
+
+/*
+ * Tell gcc we read from memory instead of writing: this is because
+ * we do not write to any memory gcc knows about, so there are no
+ * aliasing issues.
+ */
+#define __put_user_asm(err,x,ptr,bwl)			\
+__asm__ __volatile__					\
+    ("21:moves" #bwl " %2,%1\n"				\
+     "1:\n"						\
+     ".section .fixup,\"ax\"\n"				\
+     "   .even\n"					\
+     "2: movel %3,%0\n"					\
+     "   jra 1b\n"					\
+     ".previous\n"					\
+     ".section __ex_table,\"a\"\n"			\
+     "   .align 4\n"					\
+     "   .long 21b,2b\n"				\
+     "   .long 1b,2b\n"					\
+     ".previous"					\
+     : "=d"(err)					\
+     : "m"(*(ptr)), "r"(x), "i"(-EFAULT), "0"(0))
+
+#define get_user(x, ptr)					\
+({								\
+    int __gu_err;						\
+    typeof(*(ptr)) __gu_val;					\
+    switch (sizeof(*(ptr))) {					\
+    case 1:							\
+	__get_user_asm(__gu_err, __gu_val, ptr, b, "=d");	\
+	break;							\
+    case 2:							\
+	__get_user_asm(__gu_err, __gu_val, ptr, w, "=r");	\
+	break;							\
+    case 4:							\
+	__get_user_asm(__gu_err, __gu_val, ptr, l, "=r");	\
+	break;							\
+    case 8:                                                     \
+        __gu_err = __constant_copy_from_user(&__gu_val, ptr, 8);  \
+        break;                                                  \
+    default:							\
+	__gu_val = 0;						\
+	__gu_err = __get_user_bad();				\
+	break;							\
+    }								\
+    (x) = __gu_val;						\
+    __gu_err;							\
+})
+#define __get_user(x, ptr) get_user(x, ptr)
+
+extern int __get_user_bad(void);
+
+#define __get_user_asm(err,x,ptr,bwl,reg)	\
+__asm__ __volatile__				\
+    ("1: moves" #bwl " %2,%1\n"			\
+     "2:\n"					\
+     ".section .fixup,\"ax\"\n"			\
+     "   .even\n"				\
+     "3: movel %3,%0\n"				\
+     "   sub" #bwl " %1,%1\n"			\
+     "   jra 2b\n"				\
+     ".previous\n"				\
+     ".section __ex_table,\"a\"\n"		\
+     "   .align 4\n"				\
+     "   .long 1b,3b\n"				\
+     ".previous"				\
+     : "=d"(err), reg(x)			\
+     : "m"(*(ptr)), "i" (-EFAULT), "0"(0))
+
+static inline unsigned long
+__generic_copy_from_user(void *to, const void *from, unsigned long n)
+{
+    unsigned long tmp;
+    __asm__ __volatile__
+	("   tstl %2\n"
+	 "   jeq 2f\n"
+	 "1: movesl (%1)+,%3\n"
+	 "   movel %3,(%0)+\n"
+	 "   subql #1,%2\n"
+	 "   jne 1b\n"
+	 "2: movel %4,%2\n"
+	 "   bclr #1,%2\n"
+	 "   jeq 4f\n"
+	 "3: movesw (%1)+,%3\n"
+	 "   movew %3,(%0)+\n"
+	 "4: bclr #0,%2\n"
+	 "   jeq 6f\n"
+	 "5: movesb (%1)+,%3\n"
+	 "   moveb %3,(%0)+\n"
+	 "6:\n"
+	 ".section .fixup,\"ax\"\n"
+	 "   .even\n"
+	 "7: movel %2,%%d0\n"
+	 "71:clrl (%0)+\n"
+	 "   subql #1,%%d0\n"
+	 "   jne 71b\n"
+	 "   lsll #2,%2\n"
+	 "   addl %4,%2\n"
+	 "   btst #1,%4\n"
+	 "   jne 81f\n"
+	 "   btst #0,%4\n"
+	 "   jne 91f\n"
+	 "   jra 6b\n"
+	 "8: addql #2,%2\n"
+	 "81:clrw (%0)+\n"
+	 "   btst #0,%4\n"
+	 "   jne 91f\n"
+	 "   jra 6b\n"
+	 "9: addql #1,%2\n"
+	 "91:clrb (%0)+\n"
+	 "   jra 6b\n"
+         ".previous\n"
+	 ".section __ex_table,\"a\"\n"
+	 "   .align 4\n"
+	 "   .long 1b,7b\n"
+	 "   .long 3b,8b\n"
+	 "   .long 5b,9b\n"
+	 ".previous"
+	 : "=a"(to), "=a"(from), "=d"(n), "=&d"(tmp)
+	 : "d"(n & 3), "0"(to), "1"(from), "2"(n/4)
+	 : "d0", "memory");
+    return n;
+}
+
+static inline unsigned long
+__generic_copy_to_user(void *to, const void *from, unsigned long n)
+{
+    unsigned long tmp;
+    __asm__ __volatile__
+	("   tstl %2\n"
+	 "   jeq 3f\n"
+	 "1: movel (%1)+,%3\n"
+	 "22:movesl %3,(%0)+\n"
+	 "2: subql #1,%2\n"
+	 "   jne 1b\n"
+	 "3: movel %4,%2\n"
+	 "   bclr #1,%2\n"
+	 "   jeq 4f\n"
+	 "   movew (%1)+,%3\n"
+	 "24:movesw %3,(%0)+\n"
+	 "4: bclr #0,%2\n"
+	 "   jeq 5f\n"
+	 "   moveb (%1)+,%3\n"
+	 "25:movesb %3,(%0)+\n"
+	 "5:\n"
+	 ".section .fixup,\"ax\"\n"
+	 "   .even\n"
+	 "60:addql #1,%2\n"
+	 "6: lsll #2,%2\n"
+	 "   addl %4,%2\n"
+	 "   jra 5b\n"
+	 "7: addql #2,%2\n"
+	 "   jra 5b\n"
+	 "8: addql #1,%2\n"
+	 "   jra 5b\n"
+	 ".previous\n"
+	 ".section __ex_table,\"a\"\n"
+	 "   .align 4\n"
+	 "   .long 1b,60b\n"
+	 "   .long 22b,6b\n"
+	 "   .long 2b,6b\n"
+	 "   .long 24b,7b\n"
+	 "   .long 3b,60b\n"
+	 "   .long 4b,7b\n"
+	 "   .long 25b,8b\n"
+	 "   .long 5b,8b\n"
+	 ".previous"
+	 : "=a"(to), "=a"(from), "=d"(n), "=&d"(tmp)
+	 : "r"(n & 3), "0"(to), "1"(from), "2"(n / 4)
+	 : "memory");
+    return n;
+}
+
+#define __copy_from_user_big(to, from, n, fixup, copy)	\
+    __asm__ __volatile__				\
+	("10: movesl (%1)+,%%d0\n"			\
+	 "    movel %%d0,(%0)+\n"			\
+	 "    subql #1,%2\n"				\
+	 "    jne 10b\n"				\
+	 ".section .fixup,\"ax\"\n"			\
+	 "    .even\n"					\
+	 "11: movel %2,%%d0\n"				\
+	 "13: clrl (%0)+\n"				\
+	 "    subql #1,%%d0\n"				\
+	 "    jne 13b\n"				\
+	 "    lsll #2,%2\n"				\
+	 fixup "\n"					\
+	 "    jra 12f\n"				\
+	 ".previous\n"					\
+	 ".section __ex_table,\"a\"\n"			\
+	 "    .align 4\n"				\
+	 "    .long 10b,11b\n"				\
+	 ".previous\n"					\
+	 copy "\n"					\
+	 "12:"						\
+	 : "=a"(to), "=a"(from), "=d"(n)		\
+	 : "0"(to), "1"(from), "2"(n/4)			\
+	 : "d0", "memory")
+
+static inline unsigned long
+__constant_copy_from_user(void *to, const void *from, unsigned long n)
+{
+    switch (n) {
+    case 0:
+	break;
+    case 1:
+	__asm__ __volatile__
+	    ("1: movesb (%1)+,%%d0\n"
+	     "   moveb %%d0,(%0)+\n"
+	     "2:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "3: addql #1,%2\n"
+	     "   clrb (%0)+\n"
+	     "   jra 2b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,3b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 2:
+	__asm__ __volatile__
+	    ("1: movesw (%1)+,%%d0\n"
+	     "   movew %%d0,(%0)+\n"
+	     "2:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "3: addql #2,%2\n"
+	     "   clrw (%0)+\n"
+	     "   jra 2b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,3b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 3:
+	__asm__ __volatile__
+	    ("1: movesw (%1)+,%%d0\n"
+	     "   movew %%d0,(%0)+\n"
+	     "2: movesb (%1)+,%%d0\n"
+	     "   moveb %%d0,(%0)+\n"
+	     "3:"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "4: addql #2,%2\n"
+	     "   clrw (%0)+\n"
+	     "5: addql #1,%2\n"
+	     "   clrb (%0)+\n"
+	     "   jra 3b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,4b\n"
+	     "   .long 2b,5b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 4:
+	__asm__ __volatile__
+	    ("1: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "2:"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "3: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "   jra 2b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,3b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 8:
+	__asm__ __volatile__
+	    ("1: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "2: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "3:"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "4: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "5: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "   jra 3b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,4b\n"
+	     "   .long 2b,5b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 12:
+	__asm__ __volatile__
+	    ("1: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "2: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "3: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "4:"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "5: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "6: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "7: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "   jra 4b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,5b\n"
+	     "   .long 2b,6b\n"
+	     "   .long 3b,7b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 16:
+	__asm__ __volatile__
+	    ("1: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "2: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "3: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "4: movesl (%1)+,%%d0\n"
+	     "   movel %%d0,(%0)+\n"
+	     "5:"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "6: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "7: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "8: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "9: addql #4,%2\n"
+	     "   clrl (%0)+\n"
+	     "   jra 5b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 1b,6b\n"
+	     "   .long 2b,7b\n"
+	     "   .long 3b,8b\n"
+	     "   .long 4b,9b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    default:
+	switch (n & 3) {
+	case 0:
+	    __copy_from_user_big(to, from, n, "", "");
+	    break;
+	case 1:
+	    __copy_from_user_big(to, from, n,
+				 /* fixup */
+				 "1: addql #1,%2\n"
+				 "   clrb (%0)+",
+				 /* copy */
+				 "2: movesb (%1)+,%%d0\n"
+				 "   moveb %%d0,(%0)+\n"
+				 ".section __ex_table,\"a\"\n"
+				 "   .long 2b,1b\n"
+				 ".previous");
+	    break;
+	case 2:
+	    __copy_from_user_big(to, from, n,
+				 /* fixup */
+				 "1: addql #2,%2\n"
+				 "   clrw (%0)+",
+				 /* copy */
+				 "2: movesw (%1)+,%%d0\n"
+				 "   movew %%d0,(%0)+\n"
+				 ".section __ex_table,\"a\"\n"
+				 "   .long 2b,1b\n"
+				 ".previous");
+	    break;
+	case 3:
+	    __copy_from_user_big(to, from, n,
+				 /* fixup */
+				 "1: addql #2,%2\n"
+				 "   clrw (%0)+\n"
+				 "2: addql #1,%2\n"
+				 "   clrb (%0)+",
+				 /* copy */
+				 "3: movesw (%1)+,%%d0\n"
+				 "   movew %%d0,(%0)+\n"
+				 "4: movesb (%1)+,%%d0\n"
+				 "   moveb %%d0,(%0)+\n"
+				 ".section __ex_table,\"a\"\n"
+				 "   .long 3b,1b\n"
+				 "   .long 4b,2b\n"
+				 ".previous");
+	    break;
+	}
+	break;
+    }
+    return n;
+}
+
+#define __copy_to_user_big(to, from, n, fixup, copy)	\
+    __asm__ __volatile__				\
+	("10: movel (%1)+,%%d0\n"			\
+	 "31: movesl %%d0,(%0)+\n"			\
+	 "11: subql #1,%2\n"				\
+	 "    jne 10b\n"				\
+	 "41:\n"					\
+	 ".section .fixup,\"ax\"\n"			\
+	 "   .even\n"					\
+	 "22: addql #1,%2\n"				\
+	 "12: lsll #2,%2\n"				\
+	 fixup "\n"					\
+	 "    jra 13f\n"				\
+	 ".previous\n"					\
+	 ".section __ex_table,\"a\"\n"			\
+	 "    .align 4\n"				\
+	 "    .long 10b,22b\n"				\
+	 "    .long 31b,12b\n"				\
+	 "    .long 11b,12b\n"				\
+	 "    .long 41b,22b\n"				\
+	 ".previous\n"					\
+	 copy "\n"					\
+	 "13:"						\
+	 : "=a"(to), "=a"(from), "=d"(n)		\
+	 : "0"(to), "1"(from), "2"(n/4)			\
+	 : "d0", "memory")
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+static inline unsigned long
+__constant_copy_to_user(void *to, const void *from, unsigned long n)
+{
+    switch (n) {
+    case 0:
+	break;
+    case 1:
+	__asm__ __volatile__
+	    ("   moveb (%1)+,%%d0\n"
+	     "21:movesb %%d0,(%0)+\n"
+	     "1:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "2: addql #1,%2\n"
+	     "   jra 1b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n  "
+	     "   .long 21b,2b\n"
+	     "   .long 1b,2b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 2:
+	__asm__ __volatile__
+	    ("   movew (%1)+,%%d0\n"
+	     "21:movesw %%d0,(%0)+\n"
+	     "1:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "2: addql #2,%2\n"
+	     "   jra 1b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 21b,2b\n"
+	     "   .long 1b,2b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 3:
+	__asm__ __volatile__
+	    ("   movew (%1)+,%%d0\n"
+	     "21:movesw %%d0,(%0)+\n"
+	     "1: moveb (%1)+,%%d0\n"
+	     "22:movesb %%d0,(%0)+\n"
+	     "2:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "3: addql #2,%2\n"
+	     "4: addql #1,%2\n"
+	     "   jra 2b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 21b,3b\n"
+	     "   .long 1b,3b\n"
+	     "   .long 22b,4b\n"
+	     "   .long 2b,4b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 4:
+	__asm__ __volatile__
+	    ("   movel (%1)+,%%d0\n"
+	     "21:movesl %%d0,(%0)+\n"
+	     "1:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "2: addql #4,%2\n"
+	     "   jra 1b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 21b,2b\n"
+	     "   .long 1b,2b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 8:
+	__asm__ __volatile__
+	    ("   movel (%1)+,%%d0\n"
+	     "21:movesl %%d0,(%0)+\n"
+	     "1: movel (%1)+,%%d0\n"
+	     "22:movesl %%d0,(%0)+\n"
+	     "2:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "3: addql #4,%2\n"
+	     "4: addql #4,%2\n"
+	     "   jra 2b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 21b,3b\n"
+	     "   .long 1b,3b\n"
+	     "   .long 22b,4b\n"
+	     "   .long 2b,4b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 12:
+	__asm__ __volatile__
+	    ("   movel (%1)+,%%d0\n"
+	     "21:movesl %%d0,(%0)+\n"
+	     "1: movel (%1)+,%%d0\n"
+	     "22:movesl %%d0,(%0)+\n"
+	     "2: movel (%1)+,%%d0\n"
+	     "23:movesl %%d0,(%0)+\n"
+	     "3:\n"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "4: addql #4,%2\n"
+	     "5: addql #4,%2\n"
+	     "6: addql #4,%2\n"
+	     "   jra 3b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 21b,4b\n"
+	     "   .long 1b,4b\n"
+	     "   .long 22b,5b\n"
+	     "   .long 2b,5b\n"
+	     "   .long 23b,6b\n"
+	     "   .long 3b,6b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    case 16:
+	__asm__ __volatile__
+	    ("   movel (%1)+,%%d0\n"
+	     "21:movesl %%d0,(%0)+\n"
+	     "1: movel (%1)+,%%d0\n"
+	     "22:movesl %%d0,(%0)+\n"
+	     "2: movel (%1)+,%%d0\n"
+	     "23:movesl %%d0,(%0)+\n"
+	     "3: movel (%1)+,%%d0\n"
+	     "24:movesl %%d0,(%0)+\n"
+	     "4:"
+	     ".section .fixup,\"ax\"\n"
+	     "   .even\n"
+	     "5: addql #4,%2\n"
+	     "6: addql #4,%2\n"
+	     "7: addql #4,%2\n"
+	     "8: addql #4,%2\n"
+	     "   jra 4b\n"
+	     ".previous\n"
+	     ".section __ex_table,\"a\"\n"
+	     "   .align 4\n"
+	     "   .long 21b,5b\n"
+	     "   .long 1b,5b\n"
+	     "   .long 22b,6b\n"
+	     "   .long 2b,6b\n"
+	     "   .long 23b,7b\n"
+	     "   .long 3b,7b\n"
+	     "   .long 24b,8b\n"
+	     "   .long 4b,8b\n"
+	     ".previous"
+	     : "=a"(to), "=a"(from), "=d"(n)
+	     : "0"(to), "1"(from), "2"(0)
+	     : "d0", "memory");
+	break;
+    default:
+	switch (n & 3) {
+	case 0:
+	    __copy_to_user_big(to, from, n, "", "");
+	    break;
+	case 1:
+	    __copy_to_user_big(to, from, n,
+			       /* fixup */
+			       "1: addql #1,%2",
+			       /* copy */
+			       "   moveb (%1)+,%%d0\n"
+			       "22:movesb %%d0,(%0)+\n"
+			       "2:"
+			       ".section __ex_table,\"a\"\n"
+			       "   .long 22b,1b\n"
+			       "   .long 2b,1b\n"
+			       ".previous");
+	    break;
+	case 2:
+	    __copy_to_user_big(to, from, n,
+			       /* fixup */
+			       "1: addql #2,%2",
+			       /* copy */
+			       "   movew (%1)+,%%d0\n"
+			       "22:movesw %%d0,(%0)+\n"
+			       "2:"
+			       ".section __ex_table,\"a\"\n"
+			       "   .long 22b,1b\n"
+			       "   .long 2b,1b\n"
+			       ".previous");
+	    break;
+	case 3:
+	    __copy_to_user_big(to, from, n,
+			       /* fixup */
+			       "1: addql #2,%2\n"
+			       "2: addql #1,%2",
+			       /* copy */
+			       "   movew (%1)+,%%d0\n"
+			       "23:movesw %%d0,(%0)+\n"
+			       "3: moveb (%1)+,%%d0\n"
+			       "24:movesb %%d0,(%0)+\n"
+			       "4:"
+			       ".section __ex_table,\"a\"\n"
+			       "   .long 23b,1b\n"
+			       "   .long 3b,1b\n"
+			       "   .long 24b,2b\n"
+			       "   .long 4b,2b\n"
+			       ".previous");
+	    break;
+	}
+	break;
+    }
+    return n;
+}
+
+#define copy_from_user(to, from, n)		\
+(__builtin_constant_p(n) ?			\
+ __constant_copy_from_user(to, from, n) :	\
+ __generic_copy_from_user(to, from, n))
+
+#define copy_to_user(to, from, n)		\
+(__builtin_constant_p(n) ?			\
+ __constant_copy_to_user(to, from, n) :		\
+ __generic_copy_to_user(to, from, n))
+
+#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
+#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
+
+/*
+ * Copy a null terminated string from userspace.
+ */
+
+static inline long
+strncpy_from_user(char *dst, const char *src, long count)
+{
+    long res;
+    if (count == 0) return count;
+    __asm__ __volatile__
+	("1: movesb (%2)+,%%d0\n"
+	 "12:moveb %%d0,(%1)+\n"
+	 "   jeq 2f\n"
+	 "   subql #1,%3\n"
+	 "   jne 1b\n"
+	 "2: subl %3,%0\n"
+	 "3:\n"
+	 ".section .fixup,\"ax\"\n"
+	 "   .even\n"
+	 "4: movel %4,%0\n"
+	 "   jra 3b\n"
+	 ".previous\n"
+	 ".section __ex_table,\"a\"\n"
+	 "   .align 4\n"
+	 "   .long 1b,4b\n"
+	 "   .long 12b,4b\n"
+	 ".previous"
+	 : "=d"(res), "=a"(dst), "=a"(src), "=d"(count)
+	 : "i"(-EFAULT), "0"(count), "1"(dst), "2"(src), "3"(count)
+	 : "d0", "memory");
+    return res;
+}
+
+/*
+ * Return the size of a string (including the ending 0)
+ *
+ * Return 0 on exception, a value greater than N if too long
+ */
+static inline long strnlen_user(const char *src, long n)
+{
+	long res;
+
+	res = -(long)src;
+	__asm__ __volatile__
+		("1:\n"
+		 "   tstl %2\n"
+		 "   jeq 3f\n"
+		 "2: movesb (%1)+,%%d0\n"
+		 "22:\n"
+		 "   subql #1,%2\n"
+		 "   tstb %%d0\n"
+		 "   jne 1b\n"
+		 "   jra 4f\n"
+		 "3:\n"
+		 "   addql #1,%0\n"
+		 "4:\n"
+		 "   addl %1,%0\n"
+		 "5:\n"
+		 ".section .fixup,\"ax\"\n"
+		 "   .even\n"
+		 "6: moveq %3,%0\n"
+		 "   jra 5b\n"
+		 ".previous\n"
+		 ".section __ex_table,\"a\"\n"
+		 "   .align 4\n"
+		 "   .long 2b,6b\n"
+		 "   .long 22b,6b\n"
+		 ".previous"
+		 : "=d"(res), "=a"(src), "=d"(n)
+		 : "i"(0), "0"(res), "1"(src), "2"(n)
+		 : "d0");
+	return res;
+}
+
+#define strlen_user(str) strnlen_user(str, 32767)
+
+/*
+ * Zero Userspace
+ */
+
+static inline unsigned long
+clear_user(void *to, unsigned long n)
+{
+    __asm__ __volatile__
+	("   tstl %1\n"
+	 "   jeq 3f\n"
+	 "1: movesl %3,(%0)+\n"
+	 "2: subql #1,%1\n"
+	 "   jne 1b\n"
+	 "3: movel %2,%1\n"
+	 "   bclr #1,%1\n"
+	 "   jeq 4f\n"
+	 "24:movesw %3,(%0)+\n"
+	 "4: bclr #0,%1\n"
+	 "   jeq 5f\n"
+	 "25:movesb %3,(%0)+\n"
+	 "5:\n"
+	 ".section .fixup,\"ax\"\n"
+	 "   .even\n"
+	 "61:addql #1,%1\n"
+	 "6: lsll #2,%1\n"
+	 "   addl %2,%1\n"
+	 "   jra 5b\n"
+	 "7: addql #2,%1\n"
+	 "   jra 5b\n"
+	 "8: addql #1,%1\n"
+	 "   jra 5b\n"
+	 ".previous\n"
+	 ".section __ex_table,\"a\"\n"
+	 "   .align 4\n"
+	 "   .long 1b,61b\n"
+	 "   .long 2b,6b\n"
+	 "   .long 3b,61b\n"
+	 "   .long 24b,7b\n"
+	 "   .long 4b,7b\n"
+	 "   .long 25b,8b\n"
+	 "   .long 5b,8b\n"
+	 ".previous"
+	 : "=a"(to), "=d"(n)
+	 : "r"(n & 3), "r"(0), "0"(to), "1"(n/4));
+    return n;
+}
+
+#endif /* _M68K_UACCESS_H */