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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>
This commit is contained in:
Brian Gerst 2010-02-05 09:37:05 -05:00 committed by H. Peter Anvin
parent bd2984e964
commit 2e16fc7728
1 changed files with 49 additions and 41 deletions
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90
arch/x86/include/asm/io_64.h
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@ -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 */