Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/parisc/mm/ioremap.c
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*
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* (C) Copyright 1995 1996 Linus Torvalds
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* (C) Copyright 2001-2019 Helge Deller <deller@gmx.de>
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* (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
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*/
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#include <linux/vmalloc.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
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pgprot_t prot)
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{
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#ifdef CONFIG_EISA
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unsigned long end = phys_addr + size - 1;
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/* Support EISA addresses */
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if ((phys_addr >= 0x00080000 && end < 0x000fffff) ||
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(phys_addr >= 0x00500000 && end < 0x03bfffff))
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phys_addr |= F_EXTEND(0xfc000000);
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#endif
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/*
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* Don't allow anybody to remap normal RAM that we're using..
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*/
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if (phys_addr < virt_to_phys(high_memory)) {
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char *t_addr, *t_end;
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struct page *page;
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t_addr = __va(phys_addr);
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t_end = t_addr + (size - 1);
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for (page = virt_to_page(t_addr);
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page <= virt_to_page(t_end); page++) {
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if(!PageReserved(page))
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return NULL;
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}
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}
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return generic_ioremap_prot(phys_addr, size, prot);
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}
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EXPORT_SYMBOL(ioremap_prot);
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