ioremap.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * ioremap implementation.
 4 *
 5 * Copyright (C) 2015 Cadence Design Systems Inc.
 6 */
 7
 8#include <linux/io.h>
 9#include <linux/pgtable.h>
10#include <asm/cacheflush.h>
11#include <asm/io.h>
12
13void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
14			   pgprot_t prot)
15{
16	unsigned long pfn = __phys_to_pfn((phys_addr));
17	WARN_ON(pfn_valid(pfn));
18
19	return generic_ioremap_prot(phys_addr, size, prot);
20}
21EXPORT_SYMBOL(ioremap_prot);
22
23void iounmap(volatile void __iomem *addr)
24{
25	unsigned long va = (unsigned long) addr;
26
27	if ((va >= XCHAL_KIO_CACHED_VADDR &&
28	      va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) ||
29	    (va >= XCHAL_KIO_BYPASS_VADDR &&
30	      va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
31		return;
32
33	generic_iounmap(addr);
34}
35EXPORT_SYMBOL(iounmap);