| 1 | |
| 2 | * Copyright 2006 PathScale, Inc. All Rights Reserved.
|
| 3 | *
|
| 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.
|
| 7 | *
|
| 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.
|
| 12 | *
|
| 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.
|
| 16 |
|
| 17 |
|
| 18 | #ifndef _LINUX_IO_H
|
| 19 | #define _LINUX_IO_H
|
| 20 |
|
| 21 | #include <linux/types.h>
|
| 22 | #include <linux/init.h>
|
| 23 | #include <linux/bug.h>
|
| 24 | #include <linux/err.h>
|
| 25 | #include <asm/io.h>
|
| 26 | #include <asm/page.h>
|
| 27 |
|
| 28 | struct device;
|
| 29 | struct resource;
|
| 30 |
|
| 31 | __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
|
| 32 | void __ioread32_copy(void *to, const void __iomem *from, size_t count);
|
| 33 | void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
|
| 34 |
|
| 35 | #ifdef CONFIG_MMU
|
| 36 | int ioremap_page_range(unsigned long addr, unsigned long end,
|
| 37 | phys_addr_t phys_addr, pgprot_t prot);
|
| 38 | #else
|
| 39 | static inline int ioremap_page_range(unsigned long addr, unsigned long end,
|
| 40 | phys_addr_t phys_addr, pgprot_t prot)
|
| 41 | {
|
| 42 | return 0;
|
| 43 | }
|
| 44 | #endif
|
| 45 |
|
| 46 | #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
|
| 47 | void __init ioremap_huge_init(void);
|
| 48 | int arch_ioremap_pud_supported(void);
|
| 49 | int arch_ioremap_pmd_supported(void);
|
| 50 | #else
|
| 51 | static inline void ioremap_huge_init(void) { }
|
| 52 | #endif
|
| 53 |
|
| 54 | |
| 55 | * Managed iomap interface
|
| 56 |
|
| 57 | #ifdef CONFIG_HAS_IOPORT_MAP
|
| 58 | void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
|
| 59 | unsigned int nr);
|
| 60 | void devm_ioport_unmap(struct device *dev, void __iomem *addr);
|
| 61 | #else
|
| 62 | static inline void __iomem *devm_ioport_map(struct device *dev,
|
| 63 | unsigned long port,
|
| 64 | unsigned int nr)
|
| 65 | {
|
| 66 | return NULL;
|
| 67 | }
|
| 68 |
|
| 69 | static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
|
| 70 | {
|
| 71 | }
|
| 72 | #endif
|
| 73 |
|
| 74 | #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
|
| 75 |
|
| 76 | void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
|
| 77 | resource_size_t size);
|
| 78 | void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
|
| 79 | resource_size_t size);
|
| 80 | void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
|
| 81 | resource_size_t size);
|
| 82 | void devm_iounmap(struct device *dev, void __iomem *addr);
|
| 83 | int check_signature(const volatile void __iomem *io_addr,
|
| 84 | const unsigned char *signature, int length);
|
| 85 | void devm_ioremap_release(struct device *dev, void *res);
|
| 86 |
|
| 87 | void *devm_memremap(struct device *dev, resource_size_t offset,
|
| 88 | size_t size, unsigned long flags);
|
| 89 | void devm_memunmap(struct device *dev, void *addr);
|
| 90 |
|
| 91 | void *__devm_memremap_pages(struct device *dev, struct resource *res);
|
| 92 |
|
| 93 | |
| 94 | * Some systems do not have legacy ISA devices.
|
| 95 | * /dev/port is not a valid interface on these systems.
|
| 96 | * So for those archs, <asm/io.h> should define the following symbol.
|
| 97 |
|
| 98 | #ifndef arch_has_dev_port
|
| 99 | #define arch_has_dev_port() (1)
|
| 100 | #endif
|
| 101 |
|
| 102 | |
| 103 | * Some systems (x86 without PAT) have a somewhat reliable way to mark a
|
| 104 | * physical address range such that uncached mappings will actually
|
| 105 | * end up write-combining. This facility should be used in conjunction
|
| 106 | * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
|
| 107 | * no effect if the per-page mechanisms are functional.
|
| 108 | * (On x86 without PAT, these functions manipulate MTRRs.)
|
| 109 | *
|
| 110 | * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
|
| 111 | * to have no effect.
|
| 112 |
|
| 113 | #ifndef arch_phys_wc_add
|
| 114 | static inline int __must_check arch_phys_wc_add(unsigned long base,
|
| 115 | unsigned long size)
|
| 116 | {
|
| 117 | return 0;
|
| 118 | }
|
| 119 |
|
| 120 | static inline void arch_phys_wc_del(int handle)
|
| 121 | {
|
| 122 | }
|
| 123 |
|
| 124 | #define arch_phys_wc_add arch_phys_wc_add
|
| 125 | #ifndef arch_phys_wc_index
|
| 126 | static inline int arch_phys_wc_index(int handle)
|
| 127 | {
|
| 128 | return -1;
|
| 129 | }
|
| 130 | #define arch_phys_wc_index arch_phys_wc_index
|
| 131 | #endif
|
| 132 | #endif
|
| 133 |
|
| 134 | enum {
|
| 135 |
|
| 136 | MEMREMAP_WB = 1 << 0,
|
| 137 | MEMREMAP_WT = 1 << 1,
|
| 138 | MEMREMAP_WC = 1 << 2,
|
| 139 | };
|
| 140 |
|
| 141 | void *memremap(resource_size_t offset, size_t size, unsigned long flags);
|
| 142 | void memunmap(void *addr);
|
| 143 |
|
| 144 | #endif
|