2 * Copyright 2006 PathScale, Inc. All Rights Reserved.
4 * This file is free software; you can redistribute it and/or modify
5 * it under the terms of version 2 of the GNU General Public License
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
21 #include <linux/types.h>
27 __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
28 void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
31 int ioremap_page_range(unsigned long addr, unsigned long end,
32 phys_addr_t phys_addr, pgprot_t prot);
34 static inline int ioremap_page_range(unsigned long addr, unsigned long end,
35 phys_addr_t phys_addr, pgprot_t prot)
41 #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
42 void __init ioremap_huge_init(void);
43 int arch_ioremap_pud_supported(void);
44 int arch_ioremap_pmd_supported(void);
46 static inline void ioremap_huge_init(void) { }
50 * Managed iomap interface
52 #ifdef CONFIG_HAS_IOPORT_MAP
53 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
55 void devm_ioport_unmap(struct device *dev, void __iomem *addr);
57 static inline void __iomem *devm_ioport_map(struct device *dev,
64 static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
69 #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
71 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
72 resource_size_t size);
73 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
74 resource_size_t size);
75 void devm_iounmap(struct device *dev, void __iomem *addr);
76 int check_signature(const volatile void __iomem *io_addr,
77 const unsigned char *signature, int length);
78 void devm_ioremap_release(struct device *dev, void *res);
81 * Some systems do not have legacy ISA devices.
82 * /dev/port is not a valid interface on these systems.
83 * So for those archs, <asm/io.h> should define the following symbol.
85 #ifndef arch_has_dev_port
86 #define arch_has_dev_port() (1)
90 * Some systems (x86 without PAT) have a somewhat reliable way to mark a
91 * physical address range such that uncached mappings will actually
92 * end up write-combining. This facility should be used in conjunction
93 * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
94 * no effect if the per-page mechanisms are functional.
95 * (On x86 without PAT, these functions manipulate MTRRs.)
97 * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
100 #ifndef arch_phys_wc_add
101 static inline int __must_check arch_phys_wc_add(unsigned long base,
104 return 0; /* It worked (i.e. did nothing). */
107 static inline void arch_phys_wc_del(int handle)
111 #define arch_phys_wc_add arch_phys_wc_add
114 #endif /* _LINUX_IO_H */