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, 355 insertions, 0 deletions

diff --git a/include/asm-v850/bitops.h b/include/asm-v850/bitops.h
new file mode 100644
index 000000000000..7c4ecaf5151c
--- /dev/null
+++ b/include/asm-v850/bitops.h
@@ -0,0 +1,355 @@
+/*
+ * include/asm-v850/bitops.h -- Bit operations
+ *
+ *  Copyright (C) 2001,02,03,04  NEC Electronics Corporation
+ *  Copyright (C) 2001,02,03,04  Miles Bader <miles@gnu.org>
+ *  Copyright (C) 1992  Linus Torvalds.
+ *
+ * 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 __V850_BITOPS_H__
+#define __V850_BITOPS_H__
+
+
+#include <linux/config.h>
+#include <linux/compiler.h>     /* unlikely  */
+#include <asm/byteorder.h>      /* swab32 */
+#include <asm/system.h>         /* interrupt enable/disable */
+
+
+#ifdef __KERNEL__
+
+/*
+ * The __ functions are not atomic
+ */
+
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+extern __inline__ unsigned long ffz (unsigned long word)
+{
+        unsigned long result = 0;
+
+        while (word & 1) {
+                result++;
+                word >>= 1;
+        }
+        return result;
+}
+
+
+/* In the following constant-bit-op macros, a "g" constraint is used when
+   we really need an integer ("i" constraint).  This is to avoid
+   warnings/errors from the compiler in the case where the associated
+   operand _isn't_ an integer, and shouldn't produce bogus assembly because
+   use of that form is protected by a guard statement that checks for
+   constants, and should otherwise be removed by the optimizer.  This
+   _usually_ works -- however, __builtin_constant_p returns true for a
+   variable with a known constant value too, and unfortunately gcc will
+   happily put the variable in a register and use the register for the "g"
+   constraint'd asm operand.  To avoid the latter problem, we add a
+   constant offset to the operand and subtract it back in the asm code;
+   forcing gcc to do arithmetic on the value is usually enough to get it
+   to use a real constant value.  This is horrible, and ultimately
+   unreliable too, but it seems to work for now (hopefully gcc will offer
+   us more control in the future, so we can do a better job).  */
+
+#define __const_bit_op(op, nr, addr)                                    \
+  ({ __asm__ (op " (%0 - 0x123), %1"                                    \
+              :: "g" (((nr) & 0x7) + 0x123),                            \
+                 "m" (*((char *)(addr) + ((nr) >> 3)))                  \
+              : "memory"); })
+#define __var_bit_op(op, nr, addr)                                      \
+  ({ int __nr = (nr);                                                   \
+     __asm__ (op " %0, [%1]"                                            \
+              :: "r" (__nr & 0x7),                                      \
+                 "r" ((char *)(addr) + (__nr >> 3))                     \
+              : "memory"); })
+#define __bit_op(op, nr, addr)                                          \
+  ((__builtin_constant_p (nr) && (unsigned)(nr) <= 0x7FFFF)             \
+   ? __const_bit_op (op, nr, addr)                                      \
+   : __var_bit_op (op, nr, addr))
+
+#define __set_bit(nr, addr)             __bit_op ("set1", nr, addr)
+#define __clear_bit(nr, addr)           __bit_op ("clr1", nr, addr)
+#define __change_bit(nr, addr)          __bit_op ("not1", nr, addr)
+
+/* The bit instructions used by `non-atomic' variants are actually atomic.  */
+#define set_bit __set_bit
+#define clear_bit __clear_bit
+#define change_bit __change_bit
+
+
+#define __const_tns_bit_op(op, nr, addr)                                      \
+  ({ int __tns_res;                                                           \
+     __asm__ __volatile__ (                                                   \
+             "tst1 (%1 - 0x123), %2; setf nz, %0; " op " (%1 - 0x123), %2"    \
+             : "=&r" (__tns_res)                                              \
+             : "g" (((nr) & 0x7) + 0x123),                                    \
+               "m" (*((char *)(addr) + ((nr) >> 3)))                          \
+             : "memory");                                                     \
+     __tns_res;                                                               \
+  })
+#define __var_tns_bit_op(op, nr, addr)                                        \
+  ({ int __nr = (nr);                                                         \
+     int __tns_res;                                                           \
+     __asm__ __volatile__ (                                                   \
+             "tst1 %1, [%2]; setf nz, %0; " op " %1, [%2]"                    \
+              : "=&r" (__tns_res)                                             \
+              : "r" (__nr & 0x7),                                             \
+                "r" ((char *)(addr) + (__nr >> 3))                            \
+              : "memory");                                                    \
+     __tns_res;                                                               \
+  })
+#define __tns_bit_op(op, nr, addr)                                      \
+  ((__builtin_constant_p (nr) && (unsigned)(nr) <= 0x7FFFF)             \
+   ? __const_tns_bit_op (op, nr, addr)                                  \
+   : __var_tns_bit_op (op, nr, addr))
+#define __tns_atomic_bit_op(op, nr, addr)                               \
+  ({ int __tns_atomic_res, __tns_atomic_flags;                          \
+     local_irq_save (__tns_atomic_flags);                               \
+     __tns_atomic_res = __tns_bit_op (op, nr, addr);                    \
+     local_irq_restore (__tns_atomic_flags);                            \
+     __tns_atomic_res;                                                  \
+  })
+
+#define __test_and_set_bit(nr, addr)    __tns_bit_op ("set1", nr, addr)
+#define test_and_set_bit(nr, addr)      __tns_atomic_bit_op ("set1", nr, addr)
+
+#define __test_and_clear_bit(nr, addr)  __tns_bit_op ("clr1", nr, addr)
+#define test_and_clear_bit(nr, addr)    __tns_atomic_bit_op ("clr1", nr, addr)
+
+#define __test_and_change_bit(nr, addr) __tns_bit_op ("not1", nr, addr)
+#define test_and_change_bit(nr, addr)   __tns_atomic_bit_op ("not1", nr, addr)
+
+
+#define __const_test_bit(nr, addr)                                            \
+  ({ int __test_bit_res;                                                      \
+     __asm__ __volatile__ ("tst1 (%1 - 0x123), %2; setf nz, %0"               \
+                           : "=r" (__test_bit_res)                            \
+                           : "g" (((nr) & 0x7) + 0x123),                      \
+                             "m" (*((const char *)(addr) + ((nr) >> 3))));    \
+     __test_bit_res;                                                          \
+  })
+extern __inline__ int __test_bit (int nr, const void *addr)
+{
+        int res;
+        __asm__ __volatile__ ("tst1 %1, [%2]; setf nz, %0"
+                              : "=r" (res)
+                              : "r" (nr & 0x7), "r" (addr + (nr >> 3)));
+        return res;
+}
+#define test_bit(nr,addr)                                               \
+  ((__builtin_constant_p (nr) && (unsigned)(nr) <= 0x7FFFF)             \
+   ? __const_test_bit ((nr), (addr))                                    \
+   : __test_bit ((nr), (addr)))
+
+
+/* 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 find_first_zero_bit(addr, size) \
+  find_next_zero_bit ((addr), (size), 0)
+
+extern __inline__ int find_next_zero_bit (void *addr, int size, int 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) {
+                if (~ (tmp = * (p++)))
+                        goto found_middle;
+                result += 32;
+                size -= 32;
+        }
+        if (!size)
+                return result;
+        tmp = *p;
+
+ found_first:
+        tmp |= ~0UL >> size;
+ found_middle:
+        return result + ffz (tmp);
+}
+
+
+/* This is the same as generic_ffs, but we can't use that because it's
+   inline and the #include order mucks things up.  */
+static inline int generic_ffs_for_find_next_bit(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;
+}
+
+/*
+ * Find next one bit in a bitmap reasonably efficiently.
+ */
+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) {
+                if ((tmp = *p++) != 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 + generic_ffs_for_find_next_bit(tmp);
+}
+
+/*
+ * find_first_bit - find the first set bit in a memory region
+ */
+#define find_first_bit(addr, size) \
+        find_next_bit((addr), (size), 0)
+
+
+#define ffs(x) generic_ffs (x)
+#define fls(x) generic_fls (x)
+#define __ffs(x) ffs(x)
+
+
+/*
+ * This is just `generic_ffs' from <linux/bitops.h>, except that it assumes
+ * that at least one bit is set, and returns the real index of the bit
+ * (rather than the bit index + 1, like ffs does).
+ */
+static inline int sched_ffs(int x)
+{
+        int r = 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;
+}
+
+/*
+ * Every architecture must define this function. It's the fastest
+ * way of searching a 140-bit bitmap where the first 100 bits are
+ * unlikely to be set. It's guaranteed that at least one of the 140
+ * bits is set.
+ */
+static inline int sched_find_first_bit(unsigned long *b)
+{
+        unsigned offs = 0;
+        while (! *b) {
+                b++;
+                offs += 32;
+        }
+        return sched_ffs (*b) + offs;
+}
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+#define hweight32(x)                    generic_hweight32 (x)
+#define hweight16(x)                    generic_hweight16 (x)
+#define hweight8(x)                     generic_hweight8 (x)
+
+#define ext2_set_bit                    test_and_set_bit
+#define ext2_set_bit_atomic(l,n,a)      test_and_set_bit(n,a)
+#define ext2_clear_bit                  test_and_clear_bit
+#define ext2_clear_bit_atomic(l,n,a)    test_and_clear_bit(n,a)
+#define ext2_test_bit                   test_bit
+#define ext2_find_first_zero_bit        find_first_zero_bit
+#define ext2_find_next_zero_bit         find_next_zero_bit
+
+/* Bitmap functions for the minix filesystem.  */
+#define minix_test_and_set_bit          test_and_set_bit
+#define minix_set_bit                   set_bit
+#define minix_test_and_clear_bit        test_and_clear_bit
+#define minix_test_bit                  test_bit
+#define minix_find_first_zero_bit       find_first_zero_bit
+
+#endif /* __KERNEL__ */
+
+#endif /* __V850_BITOPS_H__ */