1. 根目录:
2. arch
3. mips
4. include
5. asm
6. mach-tx39xx
7. ioremap.h

/*
 *	include/asm-mips/mach-tx39xx/ioremap.h
 *
 *	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; either version
 *	2 of the License, or (at your option) any later version.
 */
#ifndef __ASM_MACH_TX39XX_IOREMAP_H
#define __ASM_MACH_TX39XX_IOREMAP_H

#include <linux/types.h>

/*
 * Allow physical addresses to be fixed up to help peripherals located
 * outside the low 32-bit range -- generic pass-through version.
 */
static inline phys_addr_t fixup_bigphys_addr(phys_addr_t phys_addr, phys_addr_t size)
{
	return phys_addr;
}

static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
	unsigned long flags)
{
#define TXX9_DIRECTMAP_BASE	0xff000000ul
	if (offset >= TXX9_DIRECTMAP_BASE &&
	    offset < TXX9_DIRECTMAP_BASE + 0xff0000)
		return (void __iomem *)offset;
	return NULL;
}

static inline int plat_iounmap(const volatile void __iomem *addr)
{
	return (unsigned long)addr >= TXX9_DIRECTMAP_BASE;
}

#endif /* __ASM_MACH_TX39XX_IOREMAP_H */