1 files changed, 300 insertions, 0 deletions

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
new file mode 100644
index 000000000000..bcee6365dca0
--- /dev/null
+++ b/include/asm-generic/io.h
@@ -0,0 +1,300 @@
+/* Generic I/O port emulation, based on MN10300 code
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef __ASM_GENERIC_IO_H
+#define __ASM_GENERIC_IO_H
+
+#include <asm/page.h> /* I/O is all done through memory accesses */
+#include <asm/cacheflush.h>
+#include <linux/types.h>
+
+#ifdef CONFIG_GENERIC_IOMAP
+#include <asm-generic/iomap.h>
+#endif
+
+#define mmiowb() do {} while (0)
+
+/*****************************************************************************/
+/*
+ * readX/writeX() are used to access memory mapped devices. On some
+ * architectures the memory mapped IO stuff needs to be accessed
+ * differently. On the simple architectures, we just read/write the
+ * memory location directly.
+ */
+static inline u8 __raw_readb(const volatile void __iomem *addr)
+{
+        return *(const volatile u8 __force *) addr;
+}
+
+static inline u16 __raw_readw(const volatile void __iomem *addr)
+{
+        return *(const volatile u16 __force *) addr;
+}
+
+static inline u32 __raw_readl(const volatile void __iomem *addr)
+{
+        return *(const volatile u32 __force *) addr;
+}
+
+#define readb __raw_readb
+#define readw(addr) __le16_to_cpu(__raw_readw(addr))
+#define readl(addr) __le32_to_cpu(__raw_readl(addr))
+
+static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
+{
+        *(volatile u8 __force *) addr = b;
+}
+
+static inline void __raw_writew(u16 b, volatile void __iomem *addr)
+{
+        *(volatile u16 __force *) addr = b;
+}
+
+static inline void __raw_writel(u32 b, volatile void __iomem *addr)
+{
+        *(volatile u32 __force *) addr = b;
+}
+
+#define writeb __raw_writeb
+#define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr)
+#define writel(b,addr) __raw_writel(__cpu_to_le32(b),addr)
+
+#ifdef CONFIG_64BIT
+static inline u64 __raw_readq(const volatile void __iomem *addr)
+{
+        return *(const volatile u64 __force *) addr;
+}
+#define readq(addr) __le64_to_cpu(__raw_readq(addr))
+
+static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
+{
+        *(volatile u64 __force *) addr = b;
+}
+#define writeq(b,addr) __raw_writeq(__cpu_to_le64(b),addr)
+#endif
+
+/*****************************************************************************/
+/*
+ * traditional input/output functions
+ */
+
+static inline u8 inb(unsigned long addr)
+{
+        return readb((volatile void __iomem *) addr);
+}
+
+static inline u16 inw(unsigned long addr)
+{
+        return readw((volatile void __iomem *) addr);
+}
+
+static inline u32 inl(unsigned long addr)
+{
+        return readl((volatile void __iomem *) addr);
+}
+
+static inline void outb(u8 b, unsigned long addr)
+{
+        writeb(b, (volatile void __iomem *) addr);
+}
+
+static inline void outw(u16 b, unsigned long addr)
+{
+        writew(b, (volatile void __iomem *) addr);
+}
+
+static inline void outl(u32 b, unsigned long addr)
+{
+        writel(b, (volatile void __iomem *) addr);
+}
+
+#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)
+{
+        if (count) {
+                u8 *buf = buffer;
+                do {
+                        u8 x = inb(addr);
+                        *buf++ = x;
+                } while (--count);
+        }
+}
+
+static inline void insw(unsigned long addr, void *buffer, int count)
+{
+        if (count) {
+                u16 *buf = buffer;
+                do {
+                        u16 x = inw(addr);
+                        *buf++ = x;
+                } while (--count);
+        }
+}
+
+static inline void insl(unsigned long addr, void *buffer, int count)
+{
+        if (count) {
+                u32 *buf = buffer;
+                do {
+                        u32 x = inl(addr);
+                        *buf++ = x;
+                } while (--count);
+        }
+}
+
+static inline void outsb(unsigned long addr, const void *buffer, int count)
+{
+        if (count) {
+                const u8 *buf = buffer;
+                do {
+                        outb(*buf++, addr);
+                } while (--count);
+        }
+}
+
+static inline void outsw(unsigned long addr, const void *buffer, int count)
+{
+        if (count) {
+                const u16 *buf = buffer;
+                do {
+                        outw(*buf++, addr);
+                } while (--count);
+        }
+}
+
+static inline void outsl(unsigned long addr, const void *buffer, int count)
+{
+        if (count) {
+                const u32 *buf = buffer;
+                do {
+                        outl(*buf++, addr);
+                } while (--count);
+        }
+}
+
+#ifndef CONFIG_GENERIC_IOMAP
+#define ioread8(addr)           readb(addr)
+#define ioread16(addr)          readw(addr)
+#define ioread32(addr)          readl(addr)
+
+#define iowrite8(v, addr)       writeb((v), (addr))
+#define iowrite16(v, addr)      writew((v), (addr))
+#define iowrite32(v, addr)      writel((v), (addr))
+
+#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 /* CONFIG_GENERIC_IOMAP */
+
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+#ifdef __KERNEL__
+
+#include <linux/vmalloc.h>
+#define __io_virt(x) ((void __force *) (x))
+
+#ifndef CONFIG_GENERIC_IOMAP
+/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
+struct pci_dev;
+extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
+static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
+{
+}
+#endif /* CONFIG_GENERIC_IOMAP */
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+static inline unsigned long virt_to_phys(volatile void *address)
+{
+        return __pa((unsigned long)address);
+}
+
+static inline void *phys_to_virt(unsigned long address)
+{
+        return __va(address);
+}
+
+/*
+ * Change "struct page" to physical address.
+ */
+static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
+{
+        return (void __iomem*) (unsigned long)offset;
+}
+
+#define __ioremap(offset, size, flags)  ioremap(offset, size)
+
+#ifndef ioremap_nocache
+#define ioremap_nocache ioremap
+#endif
+
+#ifndef ioremap_wc
+#define ioremap_wc ioremap_nocache
+#endif
+
+static inline void iounmap(void *addr)
+{
+}
+
+#ifndef CONFIG_GENERIC_IOMAP
+static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
+{
+        return (void __iomem *) port;
+}
+
+static inline void ioport_unmap(void __iomem *p)
+{
+}
+#else /* CONFIG_GENERIC_IOMAP */
+extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
+extern void ioport_unmap(void __iomem *p);
+#endif /* CONFIG_GENERIC_IOMAP */
+
+#define xlate_dev_kmem_ptr(p)   p
+#define xlate_dev_mem_ptr(p)    ((void *) (p))
+
+#ifndef virt_to_bus
+static inline unsigned long virt_to_bus(volatile void *address)
+{
+        return ((unsigned long) address);
+}
+
+static inline void *bus_to_virt(unsigned long address)
+{
+        return (void *) address;
+}
+#endif
+
+#define memset_io(a, b, c)      memset(__io_virt(a), (b), (c))
+#define memcpy_fromio(a, b, c)  memcpy((a), __io_virt(b), (c))
+#define memcpy_toio(a, b, c)    memcpy(__io_virt(a), (b), (c))
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_GENERIC_IO_H */