text: /* SPDX-License-Identifier: GPL-2.0+ */
  
  #ifndef _LINUX_IO_H
  #define _LINUX_IO_H
  
  #include <linux/compiler.h>
  #include <linux/types.h>
  #include <asm/io.h>
  
  static inline u8 ioread8(const volatile void __iomem *addr)
  {
  	return readb(addr);
  }
  
  static inline u16 ioread16(const volatile void __iomem *addr)
  {
  	return readw(addr);
  }
  
  static inline u32 ioread32(const volatile void __iomem *addr)
  {
  	return readl(addr);
  }
  
  #ifdef CONFIG_64BIT
  static inline u64 ioread64(const volatile void __iomem *addr)
  {
  	return readq(addr);
  }
  #endif /* CONFIG_64BIT */
  
  static inline void iowrite8(u8 value, volatile void __iomem *addr)
  {
  	writeb(value, addr);
  }
  
  static inline void iowrite16(u16 value, volatile void __iomem *addr)
  {
  	writew(value, addr);
  }
  
  static inline void iowrite32(u32 value, volatile void __iomem *addr)
  {
  	writel(value, addr);
  }
  
  #ifdef CONFIG_64BIT
  static inline void iowrite64(u64 value, volatile void __iomem *addr)
  {
  	writeq(value, addr);
  }
  #endif /* CONFIG_64BIT */
  
  #ifndef CONFIG_HAVE_ARCH_IOREMAP
  static inline void __iomem *ioremap(resource_size_t offset,
  				    resource_size_t size)
  {
  	return (void __iomem *)(unsigned long)offset;
  }
  
  static inline void iounmap(void __iomem *addr)
  {
  }
  
  #define devm_ioremap(dev, offset, size)		ioremap(offset, size)
  #endif
  
  #endif /* _LINUX_IO_H */
  