1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright 2006 PathScale, Inc. All Rights Reserved.
9 #include <linux/types.h>
10 #include <linux/init.h>
11 #include <linux/bug.h>
12 #include <linux/err.h>
19 __visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
20 void __ioread32_copy(void *to, const void __iomem *from, size_t count);
21 void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
24 int ioremap_page_range(unsigned long addr, unsigned long end,
25 phys_addr_t phys_addr, pgprot_t prot);
26 int vmap_page_range(unsigned long addr, unsigned long end,
27 phys_addr_t phys_addr, pgprot_t prot);
29 static inline int ioremap_page_range(unsigned long addr, unsigned long end,
30 phys_addr_t phys_addr, pgprot_t prot)
34 static inline int vmap_page_range(unsigned long addr, unsigned long end,
35 phys_addr_t phys_addr, pgprot_t prot)
42 * Managed iomap interface
44 #ifdef CONFIG_HAS_IOPORT_MAP
45 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
47 void devm_ioport_unmap(struct device *dev, void __iomem *addr);
49 static inline void __iomem *devm_ioport_map(struct device *dev,
56 static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
61 #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
63 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
64 resource_size_t size);
65 void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
66 resource_size_t size);
67 void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
68 resource_size_t size);
69 void devm_iounmap(struct device *dev, void __iomem *addr);
70 int check_signature(const volatile void __iomem *io_addr,
71 const unsigned char *signature, int length);
72 void devm_ioremap_release(struct device *dev, void *res);
74 void *devm_memremap(struct device *dev, resource_size_t offset,
75 size_t size, unsigned long flags);
76 void devm_memunmap(struct device *dev, void *addr);
78 /* architectures can override this */
79 pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr,
80 unsigned long size, pgprot_t prot);
85 * The PCI specifications (Rev 3.0, 3.2.5 "Transaction Ordering and
86 * Posting") mandate non-posted configuration transactions. This default
87 * implementation attempts to use the ioremap_np() API to provide this
88 * on arches that support it, and falls back to ioremap() on those that
89 * don't. Overriding this function is deprecated; arches that properly
90 * support non-posted accesses should implement ioremap_np() instead, which
91 * this default implementation can then use to return mappings compliant with
92 * the PCI specification.
94 #ifndef pci_remap_cfgspace
95 #define pci_remap_cfgspace pci_remap_cfgspace
96 static inline void __iomem *pci_remap_cfgspace(phys_addr_t offset,
99 return ioremap_np(offset, size) ?: ioremap(offset, size);
105 * Some systems do not have legacy ISA devices.
106 * /dev/port is not a valid interface on these systems.
107 * So for those archs, <asm/io.h> should define the following symbol.
109 #ifndef arch_has_dev_port
110 #define arch_has_dev_port() (1)
114 * Some systems (x86 without PAT) have a somewhat reliable way to mark a
115 * physical address range such that uncached mappings will actually
116 * end up write-combining. This facility should be used in conjunction
117 * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
118 * no effect if the per-page mechanisms are functional.
119 * (On x86 without PAT, these functions manipulate MTRRs.)
121 * arch_phys_del_wc(0) or arch_phys_del_wc(any error code) is guaranteed
124 #ifndef arch_phys_wc_add
125 static inline int __must_check arch_phys_wc_add(unsigned long base,
128 return 0; /* It worked (i.e. did nothing). */
131 static inline void arch_phys_wc_del(int handle)
135 #define arch_phys_wc_add arch_phys_wc_add
136 #ifndef arch_phys_wc_index
137 static inline int arch_phys_wc_index(int handle)
141 #define arch_phys_wc_index arch_phys_wc_index
145 int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long size);
148 /* See memremap() kernel-doc for usage description... */
149 MEMREMAP_WB = 1 << 0,
150 MEMREMAP_WT = 1 << 1,
151 MEMREMAP_WC = 1 << 2,
152 MEMREMAP_ENC = 1 << 3,
153 MEMREMAP_DEC = 1 << 4,
156 void *memremap(resource_size_t offset, size_t size, unsigned long flags);
157 void memunmap(void *addr);
160 * On x86 PAT systems we have memory tracking that keeps track of
161 * the allowed mappings on memory ranges. This tracking works for
162 * all the in-kernel mapping APIs (ioremap*), but where the user
163 * wishes to map a range from a physical device into user memory
164 * the tracking won't be updated. This API is to be used by
165 * drivers which remap physical device pages into userspace,
166 * and wants to make sure they are mapped WC and not UC.
168 #ifndef arch_io_reserve_memtype_wc
169 static inline int arch_io_reserve_memtype_wc(resource_size_t base,
170 resource_size_t size)
175 static inline void arch_io_free_memtype_wc(resource_size_t base,
176 resource_size_t size)
181 int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start,
182 resource_size_t size);
184 #endif /* _LINUX_IO_H */