2 * Implement the default iomap interfaces
4 * (C) Copyright 2004 Linus Torvalds
5 * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
6 * (C) Copyright 2007 MIPS Technologies, Inc.
7 * written by Ralf Baechle <ralf@linux-mips.org>
9 #include <linux/module.h>
13 * Read/write from/to an (offsettable) iomem cookie. It might be a PIO
14 * access or a MMIO access, these functions don't care. The info is
15 * encoded in the hardware mapping set up by the mapping functions
16 * (or the cookie itself, depending on implementation and hw).
18 * The generic routines don't assume any hardware mappings, and just
19 * encode the PIO/MMIO as part of the cookie. They coldly assume that
20 * the MMIO IO mappings are not in the low address range.
22 * Architectures for which this is not true can't use this generic
23 * implementation and should do their own copy.
26 #define PIO_MASK 0x0ffffUL
28 unsigned int ioread8(void __iomem *addr)
33 EXPORT_SYMBOL(ioread8);
35 unsigned int ioread16(void __iomem *addr)
40 EXPORT_SYMBOL(ioread16);
42 unsigned int ioread16be(void __iomem *addr)
44 return be16_to_cpu(__raw_readw(addr));
47 EXPORT_SYMBOL(ioread16be);
49 unsigned int ioread32(void __iomem *addr)
54 EXPORT_SYMBOL(ioread32);
56 unsigned int ioread32be(void __iomem *addr)
58 return be32_to_cpu(__raw_readl(addr));
61 EXPORT_SYMBOL(ioread32be);
63 void iowrite8(u8 val, void __iomem *addr)
68 EXPORT_SYMBOL(iowrite8);
70 void iowrite16(u16 val, void __iomem *addr)
75 EXPORT_SYMBOL(iowrite16);
77 void iowrite16be(u16 val, void __iomem *addr)
79 __raw_writew(cpu_to_be16(val), addr);
82 EXPORT_SYMBOL(iowrite16be);
84 void iowrite32(u32 val, void __iomem *addr)
89 EXPORT_SYMBOL(iowrite32);
91 void iowrite32be(u32 val, void __iomem *addr)
93 __raw_writel(cpu_to_be32(val), addr);
96 EXPORT_SYMBOL(iowrite32be);
99 * These are the "repeat MMIO read/write" functions.
100 * Note the "__raw" accesses, since we don't want to
101 * convert to CPU byte order. We write in "IO byte
102 * order" (we also don't have IO barriers).
104 static inline void mmio_insb(void __iomem *addr, u8 *dst, int count)
106 while (--count >= 0) {
107 u8 data = __raw_readb(addr);
113 static inline void mmio_insw(void __iomem *addr, u16 *dst, int count)
115 while (--count >= 0) {
116 u16 data = __raw_readw(addr);
122 static inline void mmio_insl(void __iomem *addr, u32 *dst, int count)
124 while (--count >= 0) {
125 u32 data = __raw_readl(addr);
131 static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
133 while (--count >= 0) {
134 __raw_writeb(*src, addr);
139 static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
141 while (--count >= 0) {
142 __raw_writew(*src, addr);
147 static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
149 while (--count >= 0) {
150 __raw_writel(*src, addr);
155 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
157 mmio_insb(addr, dst, count);
160 EXPORT_SYMBOL(ioread8_rep);
162 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
164 mmio_insw(addr, dst, count);
167 EXPORT_SYMBOL(ioread16_rep);
169 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
171 mmio_insl(addr, dst, count);
174 EXPORT_SYMBOL(ioread32_rep);
176 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
178 mmio_outsb(addr, src, count);
181 EXPORT_SYMBOL(iowrite8_rep);
183 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
185 mmio_outsw(addr, src, count);
188 EXPORT_SYMBOL(iowrite16_rep);
190 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
192 mmio_outsl(addr, src, count);
195 EXPORT_SYMBOL(iowrite32_rep);
198 * Create a virtual mapping cookie for an IO port range
200 * This uses the same mapping are as the in/out family which has to be setup
201 * by the platform initialization code.
203 * Just to make matters somewhat more interesting on MIPS systems with
204 * multiple host bridge each will have it's own ioport address space.
206 static void __iomem *ioport_map_legacy(unsigned long port, unsigned int nr)
208 return (void __iomem *) (mips_io_port_base + port);
211 void __iomem *ioport_map(unsigned long port, unsigned int nr)
216 return ioport_map_legacy(port, nr);
219 EXPORT_SYMBOL(ioport_map);
221 void ioport_unmap(void __iomem *addr)
226 EXPORT_SYMBOL(ioport_unmap);