Linux-2.6.12-rc2v2.6.12-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, 182 insertions, 0 deletions

diff --git a/include/asm-m68knommu/uaccess.h b/include/asm-m68knommu/uaccess.h
new file mode 100644
index 000000000000..f0be74bb353c
--- /dev/null
+++ b/include/asm-m68knommu/uaccess.h
@@ -0,0 +1,182 @@
+#ifndef __M68KNOMMU_UACCESS_H
+#define __M68KNOMMU_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+
+#include <asm/segment.h>
+
+#define VERIFY_READ     0
+#define VERIFY_WRITE    1
+
+#define access_ok(type,addr,size)       _access_ok((unsigned long)(addr),(size))
+
+static inline int _access_ok(unsigned long addr, unsigned long size)
+{
+        extern unsigned long memory_start, memory_end;
+
+        return (((addr >= memory_start) && (addr+size < memory_end)) ||
+                (is_in_rom(addr) && is_in_rom(addr+size)));
+}
+
+/* this function will go away soon - use access_ok() instead */
+extern 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;
+};
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_exception_table(unsigned long);
+
+
+/*
+ * 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 = 0;                                   \
+    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:                                             \
+        memcpy(ptr, &__pu_val, sizeof (*(ptr))); \
+        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 __ptr(x) ((unsigned long *)(x))
+
+#define __put_user_asm(err,x,ptr,bwl)                           \
+        __asm__ ("move" #bwl " %0,%1"                           \
+                : /* no outputs */                                              \
+                :"d" (x),"m" (*__ptr(ptr)) : "memory")
+
+#define get_user(x, ptr)                                        \
+({                                                              \
+    int __gu_err = 0;                                           \
+    typeof(*(ptr)) __gu_val = 0;                                \
+    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:                                                     \
+        memcpy(&__gu_val, ptr, sizeof (*(ptr))); \
+        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__ ("move" #bwl " %1,%0"                   \
+                 : "=d" (x)                                                     \
+                 : "m" (*__ptr(ptr)))
+
+#define copy_from_user(to, from, n)             (memcpy(to, from, n), 0)
+#define copy_to_user(to, from, n)               (memcpy(to, from, n), 0)
+
+#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)
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+#define copy_to_user_ret(to,from,n,retval) ({ if (copy_to_user(to,from,n)) return retval; })
+
+#define copy_from_user_ret(to,from,n,retval) ({ if (copy_from_user(to,from,n)) return retval; })
+
+/*
+ * Copy a null terminated string from userspace.
+ */
+
+static inline long
+strncpy_from_user(char *dst, const char *src, long count)
+{
+        char *tmp;
+        strncpy(dst, src, count);
+        for (tmp = dst; *tmp && count > 0; tmp++, count--)
+                ;
+        return(tmp - dst); /* DAVIDM should we count a NUL ?  check getname */
+}
+
+/*
+ * 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)
+{
+        return(strlen(src) + 1); /* DAVIDM make safer */
+}
+
+#define strlen_user(str) strnlen_user(str, 32767)
+
+/*
+ * Zero Userspace
+ */
+
+static inline unsigned long
+clear_user(void *to, unsigned long n)
+{
+        memset(to, 0, n);
+        return 0;
+}
+
+#endif /* _M68KNOMMU_UACCESS_H */