#ifndef _LINUX_IO_H
#define _LINUX_IO_H
+#include <linux/types.h>
#include <asm/io.h>
+#include <asm/page.h>
+
+struct device;
void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
+int ioremap_page_range(unsigned long addr, unsigned long end,
+ unsigned long phys_addr, pgprot_t prot);
+
+/*
+ * Managed iomap interface
+ */
+#ifdef CONFIG_HAS_IOPORT
+void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
+ unsigned int nr);
+void devm_ioport_unmap(struct device *dev, void __iomem *addr);
+#else
+static inline void __iomem *devm_ioport_map(struct device *dev,
+ unsigned long port,
+ unsigned int nr)
+{
+ return NULL;
+}
+
+static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
+{
+}
+#endif
+
+void __iomem * devm_ioremap(struct device *dev, unsigned long offset,
+ unsigned long size);
+void __iomem * devm_ioremap_nocache(struct device *dev, unsigned long offset,
+ unsigned long size);
+void devm_iounmap(struct device *dev, void __iomem *addr);
+
+/**
+ * check_signature - find BIOS signatures
+ * @io_addr: mmio address to check
+ * @signature: signature block
+ * @length: length of signature
+ *
+ * Perform a signature comparison with the mmio address io_addr. This
+ * address should have been obtained by ioremap.
+ * Returns 1 on a match.
+ */
+
+static inline int check_signature(const volatile void __iomem *io_addr,
+ const unsigned char *signature, int length)
+{
+ int retval = 0;
+ do {
+ if (readb(io_addr) != *signature)
+ goto out;
+ io_addr++;
+ signature++;
+ length--;
+ } while (length);
+ retval = 1;
+out:
+ return retval;
+}
+
#endif /* _LINUX_IO_H */