forked from Minki/linux
6df26700c0
Implement a custom ioremap implementation for iop3xx. This saves establishing new mappings. It also cleans up the PCI IO resource to be a physical address rather than a virtual address as Russell pointed out on the original iop13xx port. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* iop3xx custom ioremap implementation
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* Copyright (c) 2006, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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void * __iomem __iop3xx_ioremap(unsigned long cookie, size_t size,
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unsigned long flags)
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{
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void __iomem * retval;
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switch (cookie) {
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case IOP3XX_PCI_LOWER_IO_PA ... IOP3XX_PCI_UPPER_IO_PA:
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retval = (void *) IOP3XX_PCI_IO_PHYS_TO_VIRT(cookie);
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break;
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case IOP3XX_PERIPHERAL_PHYS_BASE ... IOP3XX_PERIPHERAL_UPPER_PA:
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retval = (void *) IOP3XX_PMMR_PHYS_TO_VIRT(cookie);
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break;
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default:
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retval = __ioremap(cookie, size, flags);
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}
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return retval;
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}
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EXPORT_SYMBOL(__iop3xx_ioremap);
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void __iop3xx_iounmap(void __iomem *addr)
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{
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extern void __iounmap(volatile void __iomem *addr);
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switch ((u32) addr) {
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case IOP3XX_PCI_LOWER_IO_VA ... IOP3XX_PCI_UPPER_IO_VA:
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case IOP3XX_PERIPHERAL_VIRT_BASE ... IOP3XX_PERIPHERAL_UPPER_VA:
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goto skip;
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}
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__iounmap(addr);
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skip:
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return;
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}
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EXPORT_SYMBOL(__iop3xx_iounmap);
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