xen: arm64: basic config and types headers

The 64-bit bitops are taken from the Linux asm-generic implementations. They
should be replaced with optimised versions from the Linux arm64 port when they
become available.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/xen/include/asm-arm/arm32/bitops.h b/xen/include/asm-arm/arm32/bitops.h
new file mode 100644
index 0000000000..0d0525855a
--- /dev/null
+++ b/xen/include/asm-arm/arm32/bitops.h
@@ -0,0 +1,54 @@
+#ifndef _ARM_ARM32_BITOPS_H
+#define _ARM_ARM32_BITOPS_H
+
+extern void _set_bit(int nr, volatile void * p);
+extern void _clear_bit(int nr, volatile void * p);
+extern void _change_bit(int nr, volatile void * p);
+extern int _test_and_set_bit(int nr, volatile void * p);
+extern int _test_and_clear_bit(int nr, volatile void * p);
+extern int _test_and_change_bit(int nr, volatile void * p);
+
+#define set_bit(n,p)              _set_bit(n,p)
+#define clear_bit(n,p)            _clear_bit(n,p)
+#define change_bit(n,p)           _change_bit(n,p)
+#define test_and_set_bit(n,p)     _test_and_set_bit(n,p)
+#define test_and_clear_bit(n,p)   _test_and_clear_bit(n,p)
+#define test_and_change_bit(n,p)  _test_and_change_bit(n,p)
+
+/*
+ * Little endian assembly bitops.  nr = 0 -> byte 0 bit 0.
+ */
+extern int _find_first_zero_bit_le(const void * p, unsigned size);
+extern int _find_next_zero_bit_le(const void * p, int size, int offset);
+extern int _find_first_bit_le(const unsigned long *p, unsigned size);
+extern int _find_next_bit_le(const unsigned long *p, int size, int offset);
+
+/*
+ * Big endian assembly bitops.  nr = 0 -> byte 3 bit 0.
+ */
+extern int _find_first_zero_bit_be(const void * p, unsigned size);
+extern int _find_next_zero_bit_be(const void * p, int size, int offset);
+extern int _find_first_bit_be(const unsigned long *p, unsigned size);
+extern int _find_next_bit_be(const unsigned long *p, int size, int offset);
+
+#ifndef __ARMEB__
+/*
+ * These are the little endian, atomic definitions.
+ */
+#define find_first_zero_bit(p,sz)	_find_first_zero_bit_le(p,sz)
+#define find_next_zero_bit(p,sz,off)	_find_next_zero_bit_le(p,sz,off)
+#define find_first_bit(p,sz)		_find_first_bit_le(p,sz)
+#define find_next_bit(p,sz,off)		_find_next_bit_le(p,sz,off)
+
+#else
+/*
+ * These are the big endian, atomic definitions.
+ */
+#define find_first_zero_bit(p,sz)	_find_first_zero_bit_be(p,sz)
+#define find_next_zero_bit(p,sz,off)	_find_next_zero_bit_be(p,sz,off)
+#define find_first_bit(p,sz)		_find_first_bit_be(p,sz)
+#define find_next_bit(p,sz,off)		_find_next_bit_be(p,sz,off)
+
+#endif
+
+#endif /* _ARM_ARM32_BITOPS_H */