u-boot/include/linux/io.h
Masahiro Yamada 9a387128e3 linux/io.h: add generic ioremap()/iounmap() defines
For most of architectures in U-Boot, virtual address is straight
mapped to physical address.  So, it makes sense to have generic
defines of ioremap and friends in <linux/io.h>.

All of them are just empty and will disappear at compile time, but
they will be helpful to implement drivers which are counterparts of
Linux ones.

I notice MIPS already has its own implementation, so I added a
Kconfig symbol CONFIG_HAVE_ARCH_IOREMAP which MIPS (and maybe
Sandbox as well) can select.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-07-14 18:22:26 -04:00

27 lines
483 B
C

/*
* 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>
#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 */