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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/*
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* iomap.c, Memory Mapped I/O routines for MIPS architecture.
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*
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* This code is based on lib/iomap.c, by Linus Torvalds.
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*
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* Copyright (C) 2004-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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unsigned long end;
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end = port + nr - 1UL;
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if (ioport_resource.start > port ||
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ioport_resource.end < end || port > end)
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return NULL;
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return (void __iomem *)(mips_io_port_base + port);
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}
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void ioport_unmap(void __iomem *addr)
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{
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}
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EXPORT_SYMBOL(ioport_map);
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EXPORT_SYMBOL(ioport_unmap);
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void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
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{
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unsigned long start, len, flags;
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if (dev == NULL)
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return NULL;
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start = pci_resource_start(dev, bar);
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len = pci_resource_len(dev, bar);
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if (!start || !len)
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return NULL;
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if (maxlen != 0 && len > maxlen)
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len = maxlen;
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flags = pci_resource_flags(dev, bar);
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if (flags & IORESOURCE_IO)
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return ioport_map(start, len);
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if (flags & IORESOURCE_MEM) {
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if (flags & IORESOURCE_CACHEABLE)
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return ioremap_cachable(start, len);
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return ioremap_nocache(start, len);
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}
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return NULL;
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}
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void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
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{
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iounmap(addr);
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}
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EXPORT_SYMBOL(pci_iomap);
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EXPORT_SYMBOL(pci_iounmap);
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