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>
28 __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
29 void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
32 int ioremap_page_range(unsigned long addr, unsigned long end,
33 phys_addr_t phys_addr, pgprot_t prot);
35 static inline int ioremap_page_range(unsigned long addr, unsigned long end,
36 phys_addr_t phys_addr, pgprot_t prot)
42 #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
43 void __init ioremap_huge_init(void);
44 int arch_ioremap_pud_supported(void);
45 int arch_ioremap_pmd_supported(void);
47 static inline void ioremap_huge_init(void) { }
51 * Managed iomap interface
53 #ifdef CONFIG_HAS_IOPORT_MAP
54 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
56 void devm_ioport_unmap(struct device *dev, void __iomem *addr);
58 static inline void __iomem *devm_ioport_map(struct device *dev,
65 static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
70 #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
72 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
73 resource_size_t size);
74 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
75 resource_size_t size);
76 void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
77 resource_size_t size);
78 void devm_iounmap(struct device *dev, void __iomem *addr);
79 int check_signature(const volatile void __iomem *io_addr,
80 const unsigned char *signature, int length);
81 void devm_ioremap_release(struct device *dev, void *res);
83 void *devm_memremap(struct device *dev, resource_size_t offset,
84 size_t size, unsigned long flags);
85 void devm_memunmap(struct device *dev, void *addr);
88 * Some systems do not have legacy ISA devices.
89 * /dev/port is not a valid interface on these systems.
90 * So for those archs, <asm/io.h> should define the following symbol.
92 #ifndef arch_has_dev_port
93 #define arch_has_dev_port() (1)
97 * Some systems (x86 without PAT) have a somewhat reliable way to mark a
98 * physical address range such that uncached mappings will actually
99 * end up write-combining. This facility should be used in conjunction
100 * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
101 * no effect if the per-page mechanisms are functional.
102 * (On x86 without PAT, these functions manipulate MTRRs.)
104 * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
107 #ifndef arch_phys_wc_add
108 static inline int __must_check arch_phys_wc_add(unsigned long base,
111 return 0; /* It worked (i.e. did nothing). */
114 static inline void arch_phys_wc_del(int handle)
118 #define arch_phys_wc_add arch_phys_wc_add
119 #ifndef arch_phys_wc_index
120 static inline int arch_phys_wc_index(int handle)
124 #define arch_phys_wc_index arch_phys_wc_index
129 /* See memremap() kernel-doc for usage description... */
130 MEMREMAP_WB = 1 << 0,
131 MEMREMAP_WT = 1 << 1,
134 void *memremap(resource_size_t offset, size_t size, unsigned long flags);
135 void memunmap(void *addr);
137 #endif /* _LINUX_IO_H */