1 files changed, 30 insertions, 149 deletions

diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index d04cd3a625f..74944207167 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -14,194 +14,75 @@
 #ifdef __KERNEL__
 #include <asm/byteorder.h>
 #include <asm/page.h>
+#include <asm/vectors.h>
+#include <linux/bug.h>
 #include <linux/kernel.h>
 
 #include <linux/types.h>
 
-#define XCHAL_KIO_CACHED_VADDR	0xe0000000
-#define XCHAL_KIO_BYPASS_VADDR	0xf0000000
-#define XCHAL_KIO_PADDR		0xf0000000
-#define XCHAL_KIO_SIZE		0x10000000
-
 #define IOADDR(x)		(XCHAL_KIO_BYPASS_VADDR + (x))
+#define IO_SPACE_LIMIT ~0
 
-/*
- * swap functions to change byte order from little-endian to big-endian and
- * vice versa.
- */
-
-static inline unsigned short _swapw (unsigned short v)
-{
-	return (v << 8) | (v >> 8);
-}
-
-static inline unsigned int _swapl (unsigned int v)
-{
-	return (v << 24) | ((v & 0xff00) << 8) | ((v >> 8) & 0xff00) | (v >> 24);
-}
+#ifdef CONFIG_MMU
 
-/*
- * Change virtual addresses to physical addresses and vv.
- * These are trivial on the 1:1 Linux/Xtensa mapping
- */
+#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
+extern unsigned long xtensa_kio_paddr;
 
-static inline unsigned long virt_to_phys(volatile void * address)
+static inline unsigned long xtensa_get_kio_paddr(void)
 {
-	return __pa(address);
+	return xtensa_kio_paddr;
 }
-
-static inline void * phys_to_virt(unsigned long address)
-{
-	return __va(address);
-}
-
-/*
- * virt_to_bus and bus_to_virt are deprecated.
- */
-
-#define virt_to_bus(x)	virt_to_phys(x)
-#define bus_to_virt(x)	phys_to_virt(x)
+#endif
 
 /*
- * Return the virtual (cached) address for the specified bus memory.
+ * Return the virtual address for the specified bus memory.
  * Note that we currently don't support any address outside the KIO segment.
  */
-
-static inline void *ioremap(unsigned long offset, unsigned long size)
+static inline void __iomem *ioremap_nocache(unsigned long offset,
+		unsigned long size)
 {
-#ifdef CONFIG_MMU
 	if (offset >= XCHAL_KIO_PADDR
-	    && offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
+	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
 		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
 	else
 		BUG();
-#else
-	return (void *)offset;
-#endif
 }
 
-static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
+static inline void __iomem *ioremap_cache(unsigned long offset,
+		unsigned long size)
 {
-#ifdef CONFIG_MMU
 	if (offset >= XCHAL_KIO_PADDR
-	    && offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
+	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
 		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
 	else
 		BUG();
-#else
-	return (void *)offset;
-#endif
 }
 
-static inline void iounmap(void *addr)
-{
-}
+#define ioremap_wc ioremap_nocache
 
-/*
- * Generic I/O
- */
-
-#define readb(addr) \
-	({ unsigned char __v = (*(volatile unsigned char *)(addr)); __v; })
-#define readw(addr) \
-	({ unsigned short __v = (*(volatile unsigned short *)(addr)); __v; })
-#define readl(addr) \
-	({ unsigned int __v = (*(volatile unsigned int *)(addr)); __v; })
-#define writeb(b, addr) (void)((*(volatile unsigned char *)(addr)) = (b))
-#define writew(b, addr) (void)((*(volatile unsigned short *)(addr)) = (b))
-#define writel(b, addr) (void)((*(volatile unsigned int *)(addr)) = (b))
-
-static inline __u8 __raw_readb(const volatile void __iomem *addr)
-{
-          return *(__force volatile __u8 *)(addr);
-}
-static inline __u16 __raw_readw(const volatile void __iomem *addr)
-{
-          return *(__force volatile __u16 *)(addr);
-}
-static inline __u32 __raw_readl(const volatile void __iomem *addr)
-{
-          return *(__force volatile __u32 *)(addr);
-}
-static inline void __raw_writeb(__u8 b, volatile void __iomem *addr)
-{
-          *(__force volatile __u8 *)(addr) = b;
-}
-static inline void __raw_writew(__u16 b, volatile void __iomem *addr)
+static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
 {
-          *(__force volatile __u16 *)(addr) = b;
+	return ioremap_nocache(offset, size);
 }
-static inline void __raw_writel(__u32 b, volatile void __iomem *addr)
+
+static inline void iounmap(volatile void __iomem *addr)
 {
-          *(__force volatile __u32 *)(addr) = b;
 }
 
-/* These are the definitions for the x86 IO instructions
- * inb/inw/inl/outb/outw/outl, the "string" versions
- * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
- * inb_p/inw_p/...
- * The macros don't do byte-swapping.
- */
-
-#define inb(port)		readb((u8 *)((port)))
-#define outb(val, port)		writeb((val),(u8 *)((unsigned long)(port)))
-#define inw(port)		readw((u16 *)((port)))
-#define outw(val, port)		writew((val),(u16 *)((unsigned long)(port)))
-#define inl(port)		readl((u32 *)((port)))
-#define outl(val, port)		writel((val),(u32 *)((unsigned long)(port)))
-
-#define inb_p(port)		inb((port))
-#define outb_p(val, port)	outb((val), (port))
-#define inw_p(port)		inw((port))
-#define outw_p(val, port)	outw((val), (port))
-#define inl_p(port)		inl((port))
-#define outl_p(val, port)	outl((val), (port))
-
-extern void insb (unsigned long port, void *dst, unsigned long count);
-extern void insw (unsigned long port, void *dst, unsigned long count);
-extern void insl (unsigned long port, void *dst, unsigned long count);
-extern void outsb (unsigned long port, const void *src, unsigned long count);
-extern void outsw (unsigned long port, const void *src, unsigned long count);
-extern void outsl (unsigned long port, const void *src, unsigned long count);
-
-#define IO_SPACE_LIMIT ~0
-
-#define memset_io(a,b,c)       memset((void *)(a),(b),(c))
-#define memcpy_fromio(a,b,c)   memcpy((a),(void *)(b),(c))
-#define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
-
-/* At this point the Xtensa doesn't provide byte swap instructions */
-
-#ifdef __XTENSA_EB__
-# define in_8(addr) (*(u8*)(addr))
-# define in_le16(addr) _swapw(*(u16*)(addr))
-# define in_le32(addr) _swapl(*(u32*)(addr))
-# define out_8(b, addr) *(u8*)(addr) = (b)
-# define out_le16(b, addr) *(u16*)(addr) = _swapw(b)
-# define out_le32(b, addr) *(u32*)(addr) = _swapl(b)
-#elif defined(__XTENSA_EL__)
-# define in_8(addr)  (*(u8*)(addr))
-# define in_le16(addr) (*(u16*)(addr))
-# define in_le32(addr) (*(u32*)(addr))
-# define out_8(b, addr) *(u8*)(addr) = (b)
-# define out_le16(b, addr) *(u16*)(addr) = (b)
-# define out_le32(b, addr) *(u32*)(addr) = (b)
-#else
-# error processor byte order undefined!
-#endif
+#define virt_to_bus     virt_to_phys
+#define bus_to_virt     phys_to_virt
 
+#endif /* CONFIG_MMU */
 
 /*
- * Convert a physical pointer to a virtual kernel pointer for /dev/mem access
- */
-#define xlate_dev_mem_ptr(p)    __va(p)
-
-/*
- * Convert a virtual cached pointer to an uncached pointer
+ * Generic I/O
  */
-#define xlate_dev_kmem_ptr(p)   p
-
+#define readb_relaxed readb
+#define readw_relaxed readw
+#define readl_relaxed readl
 
 #endif	/* __KERNEL__ */
 
+#include <asm-generic/io.h>
+
 #endif	/* _XTENSA_IO_H */