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// SPDX-License-Identifier: GPL-2.0
/*
* arch/parisc/mm/ioremap.c
*
* (C) Copyright 1995 1996 Linus Torvalds
* (C) Copyright 2001-2019 Helge Deller <deller@gmx.de>
* (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
*/
#include <linux/vmalloc.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/mm.h>
void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
unsigned long prot)
{
#ifdef CONFIG_EISA
unsigned long end = phys_addr + size - 1;
/* Support EISA addresses */
if ((phys_addr >= 0x00080000 && end < 0x000fffff) ||
(phys_addr >= 0x00500000 && end < 0x03bfffff))
phys_addr |= F_EXTEND(0xfc000000);
#endif
/*
* Don't allow anybody to remap normal RAM that we're using..
*/
if (phys_addr < virt_to_phys(high_memory)) {
char *t_addr, *t_end;
struct page *page;
t_addr = __va(phys_addr);
t_end = t_addr + (size - 1);
for (page = virt_to_page(t_addr);
page <= virt_to_page(t_end); page++) {
if(!PageReserved(page))
return NULL;
}
}
return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
}
EXPORT_SYMBOL(ioremap_prot);
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