u-boot/arch/mips/mach-bmips/include/ioremap.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_MACH_BMIPS_IOREMAP_H
#define __ASM_MACH_BMIPS_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 int is_bmips_internal_registers(phys_addr_t offset)
{
#if defined(CONFIG_SOC_BMIPS_BCM6338) || \
	defined(CONFIG_SOC_BMIPS_BCM6348) || \
	defined(CONFIG_SOC_BMIPS_BCM6358)
	if (offset >= 0xfffe0000)
		return 1;
#endif

	return 0;
}

static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
						unsigned long flags)
{
	if (is_bmips_internal_registers(offset))
		return (void __iomem *)offset;

	return NULL;
}

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

#define _page_cachable_default	_CACHE_CACHABLE_NONCOHERENT

#endif /* __ASM_MACH_BMIPS_IOREMAP_H */