1 files changed, 279 insertions, 0 deletions

diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h
new file mode 100644
index 000000000000..8c95bef3fa45
--- /dev/null
+++ b/arch/tile/include/asm/io.h
@@ -0,0 +1,279 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_IO_H
+#define _ASM_TILE_IO_H
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <asm/page.h>
+
+#define IO_SPACE_LIMIT 0xfffffffful
+
+/*
+ * 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.
+ */
+#define xlate_dev_kmem_ptr(p)   p
+
+/*
+ * Change "struct page" to physical address.
+ */
+#define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
+
+/*
+ * Some places try to pass in an loff_t for PHYSADDR (?!), so we cast it to
+ * long before casting it to a pointer to avoid compiler warnings.
+ */
+#if CHIP_HAS_MMIO()
+extern void __iomem *ioremap(resource_size_t offset, unsigned long size);
+extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
+        pgprot_t pgprot);
+extern void iounmap(volatile void __iomem *addr);
+#else
+#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
+#define iounmap(addr)           ((void)0)
+#endif
+
+#define ioremap_nocache(physaddr, size)         ioremap(physaddr, size)
+#define ioremap_writethrough(physaddr, size)    ioremap(physaddr, size)
+#define ioremap_fullcache(physaddr, size)       ioremap(physaddr, size)
+
+void __iomem *ioport_map(unsigned long port, unsigned int len);
+extern inline void ioport_unmap(void __iomem *addr) {}
+
+#define mmiowb()
+
+/* Conversion between virtual and physical mappings.  */
+#define mm_ptov(addr)           ((void *)phys_to_virt(addr))
+#define mm_vtop(addr)           ((unsigned long)virt_to_phys(addr))
+
+#ifdef CONFIG_PCI
+
+extern u8 _tile_readb(unsigned long addr);
+extern u16 _tile_readw(unsigned long addr);
+extern u32 _tile_readl(unsigned long addr);
+extern u64 _tile_readq(unsigned long addr);
+extern void _tile_writeb(u8  val, unsigned long addr);
+extern void _tile_writew(u16 val, unsigned long addr);
+extern void _tile_writel(u32 val, unsigned long addr);
+extern void _tile_writeq(u64 val, unsigned long addr);
+
+#else
+
+/*
+ * The Tile architecture does not support IOMEM unless PCI is enabled.
+ * Unfortunately we can't yet simply not declare these methods,
+ * since some generic code that compiles into the kernel, but
+ * we never run, uses them unconditionally.
+ */
+
+static inline int iomem_panic(void)
+{
+        panic("readb/writeb and friends do not exist on tile without PCI");
+        return 0;
+}
+
+static inline u8 _tile_readb(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u16 _tile_readw(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u32 _tile_readl(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u64 _tile_readq(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline void _tile_writeb(u8  val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writew(u16 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writel(u32 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writeq(u64 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+#endif
+
+#define readb(addr) _tile_readb((unsigned long)addr)
+#define readw(addr) _tile_readw((unsigned long)addr)
+#define readl(addr) _tile_readl((unsigned long)addr)
+#define readq(addr) _tile_readq((unsigned long)addr)
+#define writeb(val, addr) _tile_writeb(val, (unsigned long)addr)
+#define writew(val, addr) _tile_writew(val, (unsigned long)addr)
+#define writel(val, addr) _tile_writel(val, (unsigned long)addr)
+#define writeq(val, addr) _tile_writeq(val, (unsigned long)addr)
+
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_readq readq
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+#define __raw_writeq writeq
+
+#define readb_relaxed readb
+#define readw_relaxed readw
+#define readl_relaxed readl
+#define readq_relaxed readq
+
+#define ioread8 readb
+#define ioread16 readw
+#define ioread32 readl
+#define ioread64 readq
+#define iowrite8 writeb
+#define iowrite16 writew
+#define iowrite32 writel
+#define iowrite64 writeq
+
+static inline void *memcpy_fromio(void *dst, void *src, int len)
+{
+        int x;
+        BUG_ON((unsigned long)src & 0x3);
+        for (x = 0; x < len; x += 4)
+                *(u32 *)(dst + x) = readl(src + x);
+        return dst;
+}
+
+static inline void *memcpy_toio(void *dst, void *src, int len)
+{
+        int x;
+        BUG_ON((unsigned long)dst & 0x3);
+        for (x = 0; x < len; x += 4)
+                writel(*(u32 *)(src + x), dst + x);
+        return dst;
+}
+
+/*
+ * The Tile architecture does not support IOPORT, even with PCI.
+ * Unfortunately we can't yet simply not declare these methods,
+ * since some generic code that compiles into the kernel, but
+ * we never run, uses them unconditionally.
+ */
+
+static inline int ioport_panic(void)
+{
+        panic("inb/outb and friends do not exist on tile");
+        return 0;
+}
+
+static inline u8 inb(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline u16 inw(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline u32 inl(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline void outb(u8 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+static inline void outw(u16 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+static inline void outl(u32 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+#define inb_p(addr)     inb(addr)
+#define inw_p(addr)     inw(addr)
+#define inl_p(addr)     inl(addr)
+#define outb_p(x, addr) outb((x), (addr))
+#define outw_p(x, addr) outw((x), (addr))
+#define outl_p(x, addr) outl((x), (addr))
+
+static inline void insb(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void insw(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void insl(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsb(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsw(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsl(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+#define ioread8_rep(p, dst, count) \
+        insb((unsigned long) (p), (dst), (count))
+#define ioread16_rep(p, dst, count) \
+        insw((unsigned long) (p), (dst), (count))
+#define ioread32_rep(p, dst, count) \
+        insl((unsigned long) (p), (dst), (count))
+
+#define iowrite8_rep(p, src, count) \
+        outsb((unsigned long) (p), (src), (count))
+#define iowrite16_rep(p, src, count) \
+        outsw((unsigned long) (p), (src), (count))
+#define iowrite32_rep(p, src, count) \
+        outsl((unsigned long) (p), (src), (count))
+
+#endif /* _ASM_TILE_IO_H */