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include/linux/io.h
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/* * Copyright 2006 PathScale, Inc. All Rights Reserved. * * This file is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef _LINUX_IO_H #define _LINUX_IO_H |
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#include <linux/types.h> |
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#include <asm/io.h> |
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#include <asm/page.h> |
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struct device; |
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__visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count); |
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void __iowrite64_copy(void __iomem *to, const void *from, size_t count); |
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#ifdef CONFIG_MMU |
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int ioremap_page_range(unsigned long addr, unsigned long end, |
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phys_addr_t phys_addr, pgprot_t prot); |
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#else static inline int ioremap_page_range(unsigned long addr, unsigned long end, |
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phys_addr_t phys_addr, pgprot_t prot) |
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{ return 0; } #endif |
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/* * Managed iomap interface */ |
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#ifdef CONFIG_HAS_IOPORT_MAP |
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void __iomem * devm_ioport_map(struct device *dev, unsigned long port, unsigned int nr); void devm_ioport_unmap(struct device *dev, void __iomem *addr); |
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#else static inline void __iomem *devm_ioport_map(struct device *dev, unsigned long port, unsigned int nr) { return NULL; } static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) { } #endif |
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void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, |
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unsigned long size); |
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void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, |
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unsigned long size); void devm_iounmap(struct device *dev, void __iomem *addr); |
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int check_signature(const volatile void __iomem *io_addr, const unsigned char *signature, int length); |
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void devm_ioremap_release(struct device *dev, void *res); |
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/* * Some systems do not have legacy ISA devices. * /dev/port is not a valid interface on these systems. * So for those archs, <asm/io.h> should define the following symbol. */ #ifndef arch_has_dev_port #define arch_has_dev_port() (1) #endif |
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/* * Some systems (x86 without PAT) have a somewhat reliable way to mark a * physical address range such that uncached mappings will actually * end up write-combining. This facility should be used in conjunction * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has * no effect if the per-page mechanisms are functional. * (On x86 without PAT, these functions manipulate MTRRs.) * * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed * to have no effect. */ #ifndef arch_phys_wc_add static inline int __must_check arch_phys_wc_add(unsigned long base, unsigned long size) { return 0; /* It worked (i.e. did nothing). */ } static inline void arch_phys_wc_del(int handle) { } #define arch_phys_wc_add arch_phys_wc_add #endif |
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#endif /* _LINUX_IO_H */ |