Linux Kernel  3.7.1
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iomap.c
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1 /*
2  * ppc64 "iomap" interface implementation.
3  *
4  * (C) Copyright 2004 Linus Torvalds
5  */
6 #include <linux/init.h>
7 #include <linux/pci.h>
8 #include <linux/mm.h>
9 #include <linux/export.h>
10 #include <asm/io.h>
11 #include <asm/pci-bridge.h>
12 
13 /*
14  * Here comes the ppc64 implementation of the IOMAP
15  * interfaces.
16  */
17 unsigned int ioread8(void __iomem *addr)
18 {
19  return readb(addr);
20 }
21 unsigned int ioread16(void __iomem *addr)
22 {
23  return readw(addr);
24 }
25 unsigned int ioread16be(void __iomem *addr)
26 {
27  return in_be16(addr);
28 }
29 unsigned int ioread32(void __iomem *addr)
30 {
31  return readl(addr);
32 }
33 unsigned int ioread32be(void __iomem *addr)
34 {
35  return in_be32(addr);
36 }
37 EXPORT_SYMBOL(ioread8);
38 EXPORT_SYMBOL(ioread16);
39 EXPORT_SYMBOL(ioread16be);
40 EXPORT_SYMBOL(ioread32);
41 EXPORT_SYMBOL(ioread32be);
42 
43 void iowrite8(u8 val, void __iomem *addr)
44 {
45  writeb(val, addr);
46 }
47 void iowrite16(u16 val, void __iomem *addr)
48 {
49  writew(val, addr);
50 }
51 void iowrite16be(u16 val, void __iomem *addr)
52 {
53  out_be16(addr, val);
54 }
55 void iowrite32(u32 val, void __iomem *addr)
56 {
57  writel(val, addr);
58 }
59 void iowrite32be(u32 val, void __iomem *addr)
60 {
61  out_be32(addr, val);
62 }
63 EXPORT_SYMBOL(iowrite8);
64 EXPORT_SYMBOL(iowrite16);
65 EXPORT_SYMBOL(iowrite16be);
66 EXPORT_SYMBOL(iowrite32);
67 EXPORT_SYMBOL(iowrite32be);
68 
69 /*
70  * These are the "repeat read/write" functions. Note the
71  * non-CPU byte order. We do things in "IO byteorder"
72  * here.
73  *
74  * FIXME! We could make these do EEH handling if we really
75  * wanted. Not clear if we do.
76  */
77 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
78 {
79  _insb((u8 __iomem *) addr, dst, count);
80 }
81 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
82 {
83  _insw_ns((u16 __iomem *) addr, dst, count);
84 }
85 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
86 {
87  _insl_ns((u32 __iomem *) addr, dst, count);
88 }
89 EXPORT_SYMBOL(ioread8_rep);
90 EXPORT_SYMBOL(ioread16_rep);
91 EXPORT_SYMBOL(ioread32_rep);
92 
93 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
94 {
95  _outsb((u8 __iomem *) addr, src, count);
96 }
97 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
98 {
99  _outsw_ns((u16 __iomem *) addr, src, count);
100 }
101 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
102 {
103  _outsl_ns((u32 __iomem *) addr, src, count);
104 }
105 EXPORT_SYMBOL(iowrite8_rep);
106 EXPORT_SYMBOL(iowrite16_rep);
107 EXPORT_SYMBOL(iowrite32_rep);
108 
109 void __iomem *ioport_map(unsigned long port, unsigned int len)
110 {
111  return (void __iomem *) (port + _IO_BASE);
112 }
113 
114 void ioport_unmap(void __iomem *addr)
115 {
116  /* Nothing to do */
117 }
118 EXPORT_SYMBOL(ioport_map);
119 EXPORT_SYMBOL(ioport_unmap);
120 
121 #ifdef CONFIG_PCI
122 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
123 {
124  if (isa_vaddr_is_ioport(addr))
125  return;
126  if (pcibios_vaddr_is_ioport(addr))
127  return;
128  iounmap(addr);
129 }
130 
131 EXPORT_SYMBOL(pci_iounmap);
132 #endif /* CONFIG_PCI */
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