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b50f1704e9
This patch includes generic codes for memory management. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* linux/arch/unicore32/mm/iomap.c
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* Map IO port and PCI memory spaces so that {read,write}[bwl] can
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* be used to access this memory.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#ifdef __io
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void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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/* we map PC lagcy 64K IO port to PCI IO space 0x80030000 */
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return (void __iomem *) (unsigned long)
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io_p2v((port & 0xffff) + PKUNITY_PCILIO_BASE);
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}
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EXPORT_SYMBOL(ioport_map);
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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_unmap);
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#endif
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#ifdef CONFIG_PCI
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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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resource_size_t start = pci_resource_start(dev, bar);
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resource_size_t len = pci_resource_len(dev, bar);
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unsigned long flags = pci_resource_flags(dev, bar);
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if (!len || !start)
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return NULL;
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if (maxlen && len > maxlen)
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len = maxlen;
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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(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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EXPORT_SYMBOL(pci_iomap);
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#endif
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