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Subject[tip:x86/io] x86-64: Reorganize io_64.h
Commit-ID:  2e16fc7728a77755b5b2dc6b27dde62cd97b9ea5
Gitweb: http://git.kernel.org/tip/2e16fc7728a77755b5b2dc6b27dde62cd97b9ea5
Author: Brian Gerst <brgerst@gmail.com>
AuthorDate: Fri, 5 Feb 2010 09:37:05 -0500
Committer: H. Peter Anvin <hpa@zytor.com>
CommitDate: Fri, 5 Feb 2010 13:57:22 -0800

x86-64: Reorganize io_64.h

Make it more similar to io_32.h. No real code changes.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1265380629-3212-4-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---
arch/x86/include/asm/io_64.h | 90 +++++++++++++++++++++++-------------------
1 files changed, 49 insertions(+), 41 deletions(-)
diff --git a/arch/x86/include/asm/io_64.h b/arch/x86/include/asm/io_64.h
index 2440678..040bf74 100644
--- a/arch/x86/include/asm/io_64.h
+++ b/arch/x86/include/asm/io_64.h
@@ -35,6 +35,54 @@
* - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*/

+#ifdef __KERNEL__
+
+#include <asm-generic/iomap.h>
+
+#include <linux/vmalloc.h>
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p) p
+
+void memset_io(volatile void __iomem *a, int b, size_t c);
+
+void __memcpy_fromio(void *, unsigned long, unsigned);
+static inline void memcpy_fromio(void *to, const volatile void __iomem *from,
+ unsigned len)
+{
+ __memcpy_fromio(to, (unsigned long)from, len);
+}
+
+void __memcpy_toio(unsigned long, const void *, unsigned);
+static inline void memcpy_toio(volatile void __iomem *to, const void *from,
+ unsigned len)
+{
+ __memcpy_toio((unsigned long)to, from, len);
+}
+
+/*
+ * ISA space is 'always mapped' on a typical x86 system, no need to
+ * explicitly ioremap() it. The fact that the ISA IO space is mapped
+ * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
+ * are physical addresses. The following constant pointer can be
+ * used as the IO-area pointer (it can be iounmapped as well, so the
+ * analogy with PCI is quite large):
+ */
+#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
+
+/*
+ * Cache management
+ *
+ * This needed for two cases
+ * 1. Out of order aware processors
+ * 2. Accidentally out of order processors (PPro errata #51)
+ */
+#define flush_write_buffers() do { } while (0)
+
+#endif /* __KERNEL__ */
+
extern void native_io_delay(void);

extern int io_delay_type;
@@ -53,6 +101,7 @@ static inline void slow_down_io(void)
native_io_delay();
#endif
}
+
#endif

/*
@@ -136,46 +185,5 @@ __OUTS(b)
__OUTS(w)
__OUTS(l)

-#if defined(__KERNEL__) && defined(__x86_64__)
-
-#include <linux/vmalloc.h>
-
-#include <asm-generic/iomap.h>
-
-void __memcpy_fromio(void *, unsigned long, unsigned);
-void __memcpy_toio(unsigned long, const void *, unsigned);
-
-static inline void memcpy_fromio(void *to, const volatile void __iomem *from,
- unsigned len)
-{
- __memcpy_fromio(to, (unsigned long)from, len);
-}
-
-static inline void memcpy_toio(volatile void __iomem *to, const void *from,
- unsigned len)
-{
- __memcpy_toio((unsigned long)to, from, len);
-}
-
-void memset_io(volatile void __iomem *a, int b, size_t c);
-
-/*
- * ISA space is 'always mapped' on a typical x86 system, no need to
- * explicitly ioremap() it. The fact that the ISA IO space is mapped
- * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
- * are physical addresses. The following constant pointer can be
- * used as the IO-area pointer (it can be iounmapped as well, so the
- * analogy with PCI is quite large):
- */
-#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
-
-#define flush_write_buffers()
-
-/*
- * Convert a virtual cached pointer to an uncached pointer
- */
-#define xlate_dev_kmem_ptr(p) p
-
-#endif /* __KERNEL__ */

#endif /* _ASM_X86_IO_64_H */

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