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157 lines
4.6 KiB
157 lines
4.6 KiB
/* |
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* Copyright 2006 PathScale, Inc. All Rights Reserved. |
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* |
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* This file is free software; you can redistribute it and/or modify |
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* it under the terms of version 2 of the GNU General Public License |
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* as published by the Free Software Foundation. |
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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 Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
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*/ |
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#ifndef _LINUX_IO_H |
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#define _LINUX_IO_H |
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#include <linux/types.h> |
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#include <linux/init.h> |
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#include <linux/bug.h> |
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#include <linux/err.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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struct resource; |
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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 |
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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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{ |
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return 0; |
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} |
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#endif |
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#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP |
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void __init ioremap_huge_init(void); |
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int arch_ioremap_pud_supported(void); |
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int arch_ioremap_pmd_supported(void); |
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#else |
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static inline void ioremap_huge_init(void) { } |
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#endif |
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/* |
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* Managed iomap interface |
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*/ |
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#ifdef CONFIG_HAS_IOPORT_MAP |
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void __iomem * devm_ioport_map(struct device *dev, unsigned long port, |
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unsigned int nr); |
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void devm_ioport_unmap(struct device *dev, void __iomem *addr); |
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#else |
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static inline void __iomem *devm_ioport_map(struct device *dev, |
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unsigned long port, |
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unsigned int nr) |
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{ |
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return NULL; |
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} |
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static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) |
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{ |
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} |
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#endif |
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#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err) |
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void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, |
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resource_size_t size); |
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void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, |
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resource_size_t size); |
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void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, |
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resource_size_t size); |
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void devm_iounmap(struct device *dev, void __iomem *addr); |
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int check_signature(const volatile void __iomem *io_addr, |
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const unsigned char *signature, int length); |
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void devm_ioremap_release(struct device *dev, void *res); |
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void *devm_memremap(struct device *dev, resource_size_t offset, |
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size_t size, unsigned long flags); |
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void devm_memunmap(struct device *dev, void *addr); |
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void *__devm_memremap_pages(struct device *dev, struct resource *res); |
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#ifdef CONFIG_ZONE_DEVICE |
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void *devm_memremap_pages(struct device *dev, struct resource *res); |
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#else |
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static inline void *devm_memremap_pages(struct device *dev, struct resource *res) |
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{ |
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/* |
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* Fail attempts to call devm_memremap_pages() without |
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* ZONE_DEVICE support enabled, this requires callers to fall |
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* back to plain devm_memremap() based on config |
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*/ |
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WARN_ON_ONCE(1); |
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return ERR_PTR(-ENXIO); |
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} |
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#endif |
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/* |
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* Some systems do not have legacy ISA devices. |
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* /dev/port is not a valid interface on these systems. |
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* So for those archs, <asm/io.h> should define the following symbol. |
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*/ |
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#ifndef arch_has_dev_port |
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#define arch_has_dev_port() (1) |
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#endif |
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/* |
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* Some systems (x86 without PAT) have a somewhat reliable way to mark a |
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* physical address range such that uncached mappings will actually |
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* end up write-combining. This facility should be used in conjunction |
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* with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has |
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* no effect if the per-page mechanisms are functional. |
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* (On x86 without PAT, these functions manipulate MTRRs.) |
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* |
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* arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed |
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* to have no effect. |
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*/ |
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#ifndef arch_phys_wc_add |
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static inline int __must_check arch_phys_wc_add(unsigned long base, |
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unsigned long size) |
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{ |
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return 0; /* It worked (i.e. did nothing). */ |
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} |
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static inline void arch_phys_wc_del(int handle) |
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{ |
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} |
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#define arch_phys_wc_add arch_phys_wc_add |
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#ifndef arch_phys_wc_index |
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static inline int arch_phys_wc_index(int handle) |
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{ |
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return -1; |
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} |
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#define arch_phys_wc_index arch_phys_wc_index |
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#endif |
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#endif |
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enum { |
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/* See memremap() kernel-doc for usage description... */ |
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MEMREMAP_WB = 1 << 0, |
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MEMREMAP_WT = 1 << 1, |
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}; |
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void *memremap(resource_size_t offset, size_t size, unsigned long flags); |
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void memunmap(void *addr); |
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#endif /* _LINUX_IO_H */
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