From b50f1704e9c441c58cf6dc05e72953ca30e1d4d2 Mon Sep 17 00:00:00 2001 From: GuanXuetao Date: Sat, 15 Jan 2011 18:16:59 +0800 Subject: unicore32 core architecture: mm related: generic codes This patch includes generic codes for memory management. Signed-off-by: Guan Xuetao Reviewed-by: Arnd Bergmann --- arch/unicore32/mm/iomap.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 arch/unicore32/mm/iomap.c (limited to 'arch/unicore32/mm/iomap.c') diff --git a/arch/unicore32/mm/iomap.c b/arch/unicore32/mm/iomap.c new file mode 100644 index 0000000..a7e1a3d --- /dev/null +++ b/arch/unicore32/mm/iomap.c @@ -0,0 +1,56 @@ +/* + * linux/arch/unicore32/mm/iomap.c + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Map IO port and PCI memory spaces so that {read,write}[bwl] can + * be used to access this memory. + */ +#include +#include +#include +#include + +#ifdef __io +void __iomem *ioport_map(unsigned long port, unsigned int nr) +{ + /* we map PC lagcy 64K IO port to PCI IO space 0x80030000 */ + return (void __iomem *) (unsigned long) + io_p2v((port & 0xffff) + PKUNITY_PCILIO_BASE); +} +EXPORT_SYMBOL(ioport_map); + +void ioport_unmap(void __iomem *addr) +{ +} +EXPORT_SYMBOL(ioport_unmap); +#endif + +#ifdef CONFIG_PCI +void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) +{ + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); + unsigned long flags = pci_resource_flags(dev, bar); + + if (!len || !start) + return NULL; + if (maxlen && len > maxlen) + len = maxlen; + if (flags & IORESOURCE_IO) + return ioport_map(start, len); + if (flags & IORESOURCE_MEM) { + if (flags & IORESOURCE_CACHEABLE) + return ioremap(start, len); + return ioremap_nocache(start, len); + } + return NULL; +} +EXPORT_SYMBOL(pci_iomap); +#endif -- cgit v1.1