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>
22 #include <linux/init.h>
23 #include <linux/bug.h>
24 #include <linux/err.h>
31 __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
32 void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
35 int ioremap_page_range(unsigned long addr, unsigned long end,
36 phys_addr_t phys_addr, pgprot_t prot);
38 static inline int ioremap_page_range(unsigned long addr, unsigned long end,
39 phys_addr_t phys_addr, pgprot_t prot)
45 #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
46 void __init ioremap_huge_init(void);
47 int arch_ioremap_pud_supported(void);
48 int arch_ioremap_pmd_supported(void);
50 static inline void ioremap_huge_init(void) { }
54 * Managed iomap interface
56 #ifdef CONFIG_HAS_IOPORT_MAP
57 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
59 void devm_ioport_unmap(struct device *dev, void __iomem *addr);
61 static inline void __iomem *devm_ioport_map(struct device *dev,
68 static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
73 #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
75 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
76 resource_size_t size);
77 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
78 resource_size_t size);
79 void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
80 resource_size_t size);
81 void devm_iounmap(struct device *dev, void __iomem *addr);
82 int check_signature(const volatile void __iomem *io_addr,
83 const unsigned char *signature, int length);
84 void devm_ioremap_release(struct device *dev, void *res);
86 void *devm_memremap(struct device *dev, resource_size_t offset,
87 size_t size, unsigned long flags);
88 void devm_memunmap(struct device *dev, void *addr);
90 void *__devm_memremap_pages(struct device *dev, struct resource *res);
92 #ifdef CONFIG_ZONE_DEVICE
93 void *devm_memremap_pages(struct device *dev, struct resource *res);
95 static inline void *devm_memremap_pages(struct device *dev, struct resource *res)
98 * Fail attempts to call devm_memremap_pages() without
99 * ZONE_DEVICE support enabled, this requires callers to fall
100 * back to plain devm_memremap() based on config
103 return ERR_PTR(-ENXIO);
108 * Some systems do not have legacy ISA devices.
109 * /dev/port is not a valid interface on these systems.
110 * So for those archs, <asm/io.h> should define the following symbol.
112 #ifndef arch_has_dev_port
113 #define arch_has_dev_port() (1)
117 * Some systems (x86 without PAT) have a somewhat reliable way to mark a
118 * physical address range such that uncached mappings will actually
119 * end up write-combining. This facility should be used in conjunction
120 * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
121 * no effect if the per-page mechanisms are functional.
122 * (On x86 without PAT, these functions manipulate MTRRs.)
124 * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
127 #ifndef arch_phys_wc_add
128 static inline int __must_check arch_phys_wc_add(unsigned long base,
131 return 0; /* It worked (i.e. did nothing). */
134 static inline void arch_phys_wc_del(int handle)
138 #define arch_phys_wc_add arch_phys_wc_add
139 #ifndef arch_phys_wc_index
140 static inline int arch_phys_wc_index(int handle)
144 #define arch_phys_wc_index arch_phys_wc_index
149 /* See memremap() kernel-doc for usage description... */
150 MEMREMAP_WB = 1 << 0,
151 MEMREMAP_WT = 1 << 1,
154 void *memremap(resource_size_t offset, size_t size, unsigned long flags);
155 void memunmap(void *addr);
157 #endif /* _LINUX_IO_H */