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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __GENERIC_IO_H |
3 | #define __GENERIC_IO_H | |
4 | ||
5 | #include <linux/linkage.h> | |
dae409a2 | 6 | #include <asm/byteorder.h> |
1da177e4 LT |
7 | |
8 | /* | |
9 | * These are the "generic" interfaces for doing new-style | |
10 | * memory-mapped or PIO accesses. Architectures may do | |
11 | * their own arch-optimized versions, these just act as | |
12 | * wrappers around the old-style IO register access functions: | |
13 | * read[bwl]/write[bwl]/in[bwl]/out[bwl] | |
14 | * | |
15 | * Don't include this directly, include it from <asm/io.h>. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * Read/write from/to an (offsettable) iomem cookie. It might be a PIO | |
20 | * access or a MMIO access, these functions don't care. The info is | |
21 | * encoded in the hardware mapping set up by the mapping functions | |
22 | * (or the cookie itself, depending on implementation and hw). | |
23 | * | |
24 | * The generic routines just encode the PIO/MMIO as part of the | |
25 | * cookie, and coldly assume that the MMIO IO mappings are not | |
26 | * in the low address range. Architectures for which this is not | |
27 | * true can't use this generic implementation. | |
28 | */ | |
144b2a91 HH |
29 | extern unsigned int ioread8(void __iomem *); |
30 | extern unsigned int ioread16(void __iomem *); | |
31 | extern unsigned int ioread16be(void __iomem *); | |
32 | extern unsigned int ioread32(void __iomem *); | |
33 | extern unsigned int ioread32be(void __iomem *); | |
9e44fb18 HG |
34 | #ifdef CONFIG_64BIT |
35 | extern u64 ioread64(void __iomem *); | |
36 | extern u64 ioread64be(void __iomem *); | |
37 | #endif | |
1da177e4 | 38 | |
144b2a91 HH |
39 | extern void iowrite8(u8, void __iomem *); |
40 | extern void iowrite16(u16, void __iomem *); | |
41 | extern void iowrite16be(u16, void __iomem *); | |
42 | extern void iowrite32(u32, void __iomem *); | |
43 | extern void iowrite32be(u32, void __iomem *); | |
9e44fb18 HG |
44 | #ifdef CONFIG_64BIT |
45 | extern void iowrite64(u64, void __iomem *); | |
46 | extern void iowrite64be(u64, void __iomem *); | |
47 | #endif | |
1da177e4 LT |
48 | |
49 | /* | |
50 | * "string" versions of the above. Note that they | |
51 | * use native byte ordering for the accesses (on | |
52 | * the assumption that IO and memory agree on a | |
53 | * byte order, and CPU byteorder is irrelevant). | |
54 | * | |
55 | * They do _not_ update the port address. If you | |
56 | * want MMIO that copies stuff laid out in MMIO | |
57 | * memory across multiple ports, use "memcpy_toio()" | |
58 | * and friends. | |
59 | */ | |
144b2a91 HH |
60 | extern void ioread8_rep(void __iomem *port, void *buf, unsigned long count); |
61 | extern void ioread16_rep(void __iomem *port, void *buf, unsigned long count); | |
62 | extern void ioread32_rep(void __iomem *port, void *buf, unsigned long count); | |
1da177e4 | 63 | |
144b2a91 HH |
64 | extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count); |
65 | extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count); | |
66 | extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count); | |
1da177e4 | 67 | |
ce816fa8 | 68 | #ifdef CONFIG_HAS_IOPORT_MAP |
1da177e4 LT |
69 | /* Create a virtual mapping cookie for an IO port range */ |
70 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr); | |
71 | extern void ioport_unmap(void __iomem *); | |
82ed223c | 72 | #endif |
1da177e4 | 73 | |
1526a756 | 74 | #ifndef ARCH_HAS_IOREMAP_WC |
75 | #define ioremap_wc ioremap_nocache | |
76 | #endif | |
77 | ||
d838270e TK |
78 | #ifndef ARCH_HAS_IOREMAP_WT |
79 | #define ioremap_wt ioremap_nocache | |
80 | #endif | |
81 | ||
82ed223c | 82 | #ifdef CONFIG_PCI |
66eab4df | 83 | /* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */ |
1da177e4 | 84 | struct pci_dev; |
1da177e4 | 85 | extern void pci_iounmap(struct pci_dev *dev, void __iomem *); |
97a29d59 | 86 | #elif defined(CONFIG_GENERIC_IOMAP) |
fea80311 | 87 | struct pci_dev; |
fea80311 RD |
88 | static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) |
89 | { } | |
82ed223c | 90 | #endif |
1da177e4 | 91 | |
66eab4df MT |
92 | #include <asm-generic/pci_iomap.h> |
93 | ||
1da177e4 | 94 | #endif |