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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Implement the default iomap interfaces
4 *
5 * (C) Copyright 2004 Linus Torvalds
6 */
7#include <linux/pci.h>
8#include <linux/io.h>
9
10#include <linux/export.h>
11
12/*
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).
17 *
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.
21 *
22 * Architectures for which this is not true can't use this generic
23 * implementation and should do their own copy.
24 */
25
26#ifndef HAVE_ARCH_PIO_SIZE
27/*
28 * We encode the physical PIO addresses (0-0xffff) into the
29 * pointer by offsetting them with a constant (0x10000) and
30 * assuming that all the low addresses are always PIO. That means
31 * we can do some sanity checks on the low bits, and don't
32 * need to just take things for granted.
33 */
34#define PIO_OFFSET 0x10000UL
35#define PIO_MASK 0x0ffffUL
36#define PIO_RESERVED 0x40000UL
37#endif
38
39static void bad_io_access(unsigned long port, const char *access)
40{
41 static int count = 10;
42 if (count) {
43 count--;
44 WARN(1, KERN_ERR "Bad IO access at port %#lx (%s)\n", port, access);
45 }
46}
47
48/*
49 * Ugly macros are a way of life.
50 */
51#define IO_COND(addr, is_pio, is_mmio) do { \
52 unsigned long port = (unsigned long __force)addr; \
53 if (port >= PIO_RESERVED) { \
54 is_mmio; \
55 } else if (port > PIO_OFFSET) { \
56 port &= PIO_MASK; \
57 is_pio; \
58 } else \
59 bad_io_access(port, #is_pio ); \
60} while (0)
61
62#ifndef pio_read16be
63#define pio_read16be(port) swab16(inw(port))
64#define pio_read32be(port) swab32(inl(port))
65#endif
66
67#ifndef mmio_read16be
68#define mmio_read16be(addr) swab16(readw(addr))
69#define mmio_read32be(addr) swab32(readl(addr))
70#define mmio_read64be(addr) swab64(readq(addr))
71#endif
72
73unsigned int ioread8(void __iomem *addr)
74{
75 IO_COND(addr, return inb(port), return readb(addr));
76 return 0xff;
77}
78unsigned int ioread16(void __iomem *addr)
79{
80 IO_COND(addr, return inw(port), return readw(addr));
81 return 0xffff;
82}
83unsigned int ioread16be(void __iomem *addr)
84{
85 IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr));
86 return 0xffff;
87}
88unsigned int ioread32(void __iomem *addr)
89{
90 IO_COND(addr, return inl(port), return readl(addr));
91 return 0xffffffff;
92}
93unsigned int ioread32be(void __iomem *addr)
94{
95 IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr));
96 return 0xffffffff;
97}
98EXPORT_SYMBOL(ioread8);
99EXPORT_SYMBOL(ioread16);
100EXPORT_SYMBOL(ioread16be);
101EXPORT_SYMBOL(ioread32);
102EXPORT_SYMBOL(ioread32be);
103
104#ifdef readq
105static u64 pio_read64_lo_hi(unsigned long port)
106{
107 u64 lo, hi;
108
109 lo = inl(port);
110 hi = inl(port + sizeof(u32));
111
112 return lo | (hi << 32);
113}
114
115static u64 pio_read64_hi_lo(unsigned long port)
116{
117 u64 lo, hi;
118
119 hi = inl(port + sizeof(u32));
120 lo = inl(port);
121
122 return lo | (hi << 32);
123}
124
125static u64 pio_read64be_lo_hi(unsigned long port)
126{
127 u64 lo, hi;
128
129 lo = pio_read32be(port + sizeof(u32));
130 hi = pio_read32be(port);
131
132 return lo | (hi << 32);
133}
134
135static u64 pio_read64be_hi_lo(unsigned long port)
136{
137 u64 lo, hi;
138
139 hi = pio_read32be(port);
140 lo = pio_read32be(port + sizeof(u32));
141
142 return lo | (hi << 32);
143}
144
145u64 ioread64_lo_hi(void __iomem *addr)
146{
147 IO_COND(addr, return pio_read64_lo_hi(port), return readq(addr));
148 return 0xffffffffffffffffULL;
149}
150
151u64 ioread64_hi_lo(void __iomem *addr)
152{
153 IO_COND(addr, return pio_read64_hi_lo(port), return readq(addr));
154 return 0xffffffffffffffffULL;
155}
156
157u64 ioread64be_lo_hi(void __iomem *addr)
158{
159 IO_COND(addr, return pio_read64be_lo_hi(port),
160 return mmio_read64be(addr));
161 return 0xffffffffffffffffULL;
162}
163
164u64 ioread64be_hi_lo(void __iomem *addr)
165{
166 IO_COND(addr, return pio_read64be_hi_lo(port),
167 return mmio_read64be(addr));
168 return 0xffffffffffffffffULL;
169}
170
171EXPORT_SYMBOL(ioread64_lo_hi);
172EXPORT_SYMBOL(ioread64_hi_lo);
173EXPORT_SYMBOL(ioread64be_lo_hi);
174EXPORT_SYMBOL(ioread64be_hi_lo);
175
176#endif /* readq */
177
178#ifndef pio_write16be
179#define pio_write16be(val,port) outw(swab16(val),port)
180#define pio_write32be(val,port) outl(swab32(val),port)
181#endif
182
183#ifndef mmio_write16be
184#define mmio_write16be(val,port) writew(swab16(val),port)
185#define mmio_write32be(val,port) writel(swab32(val),port)
186#define mmio_write64be(val,port) writeq(swab64(val),port)
187#endif
188
189void iowrite8(u8 val, void __iomem *addr)
190{
191 IO_COND(addr, outb(val,port), writeb(val, addr));
192}
193void iowrite16(u16 val, void __iomem *addr)
194{
195 IO_COND(addr, outw(val,port), writew(val, addr));
196}
197void iowrite16be(u16 val, void __iomem *addr)
198{
199 IO_COND(addr, pio_write16be(val,port), mmio_write16be(val, addr));
200}
201void iowrite32(u32 val, void __iomem *addr)
202{
203 IO_COND(addr, outl(val,port), writel(val, addr));
204}
205void iowrite32be(u32 val, void __iomem *addr)
206{
207 IO_COND(addr, pio_write32be(val,port), mmio_write32be(val, addr));
208}
209EXPORT_SYMBOL(iowrite8);
210EXPORT_SYMBOL(iowrite16);
211EXPORT_SYMBOL(iowrite16be);
212EXPORT_SYMBOL(iowrite32);
213EXPORT_SYMBOL(iowrite32be);
214
215#ifdef writeq
216static void pio_write64_lo_hi(u64 val, unsigned long port)
217{
218 outl(val, port);
219 outl(val >> 32, port + sizeof(u32));
220}
221
222static void pio_write64_hi_lo(u64 val, unsigned long port)
223{
224 outl(val >> 32, port + sizeof(u32));
225 outl(val, port);
226}
227
228static void pio_write64be_lo_hi(u64 val, unsigned long port)
229{
230 pio_write32be(val, port + sizeof(u32));
231 pio_write32be(val >> 32, port);
232}
233
234static void pio_write64be_hi_lo(u64 val, unsigned long port)
235{
236 pio_write32be(val >> 32, port);
237 pio_write32be(val, port + sizeof(u32));
238}
239
240void iowrite64_lo_hi(u64 val, void __iomem *addr)
241{
242 IO_COND(addr, pio_write64_lo_hi(val, port),
243 writeq(val, addr));
244}
245
246void iowrite64_hi_lo(u64 val, void __iomem *addr)
247{
248 IO_COND(addr, pio_write64_hi_lo(val, port),
249 writeq(val, addr));
250}
251
252void iowrite64be_lo_hi(u64 val, void __iomem *addr)
253{
254 IO_COND(addr, pio_write64be_lo_hi(val, port),
255 mmio_write64be(val, addr));
256}
257
258void iowrite64be_hi_lo(u64 val, void __iomem *addr)
259{
260 IO_COND(addr, pio_write64be_hi_lo(val, port),
261 mmio_write64be(val, addr));
262}
263
264EXPORT_SYMBOL(iowrite64_lo_hi);
265EXPORT_SYMBOL(iowrite64_hi_lo);
266EXPORT_SYMBOL(iowrite64be_lo_hi);
267EXPORT_SYMBOL(iowrite64be_hi_lo);
268
269#endif /* readq */
270
271/*
272 * These are the "repeat MMIO read/write" functions.
273 * Note the "__raw" accesses, since we don't want to
274 * convert to CPU byte order. We write in "IO byte
275 * order" (we also don't have IO barriers).
276 */
277#ifndef mmio_insb
278static inline void mmio_insb(void __iomem *addr, u8 *dst, int count)
279{
280 while (--count >= 0) {
281 u8 data = __raw_readb(addr);
282 *dst = data;
283 dst++;
284 }
285}
286static inline void mmio_insw(void __iomem *addr, u16 *dst, int count)
287{
288 while (--count >= 0) {
289 u16 data = __raw_readw(addr);
290 *dst = data;
291 dst++;
292 }
293}
294static inline void mmio_insl(void __iomem *addr, u32 *dst, int count)
295{
296 while (--count >= 0) {
297 u32 data = __raw_readl(addr);
298 *dst = data;
299 dst++;
300 }
301}
302#endif
303
304#ifndef mmio_outsb
305static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
306{
307 while (--count >= 0) {
308 __raw_writeb(*src, addr);
309 src++;
310 }
311}
312static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
313{
314 while (--count >= 0) {
315 __raw_writew(*src, addr);
316 src++;
317 }
318}
319static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
320{
321 while (--count >= 0) {
322 __raw_writel(*src, addr);
323 src++;
324 }
325}
326#endif
327
328void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
329{
330 IO_COND(addr, insb(port,dst,count), mmio_insb(addr, dst, count));
331}
332void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
333{
334 IO_COND(addr, insw(port,dst,count), mmio_insw(addr, dst, count));
335}
336void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
337{
338 IO_COND(addr, insl(port,dst,count), mmio_insl(addr, dst, count));
339}
340EXPORT_SYMBOL(ioread8_rep);
341EXPORT_SYMBOL(ioread16_rep);
342EXPORT_SYMBOL(ioread32_rep);
343
344void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
345{
346 IO_COND(addr, outsb(port, src, count), mmio_outsb(addr, src, count));
347}
348void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
349{
350 IO_COND(addr, outsw(port, src, count), mmio_outsw(addr, src, count));
351}
352void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
353{
354 IO_COND(addr, outsl(port, src,count), mmio_outsl(addr, src, count));
355}
356EXPORT_SYMBOL(iowrite8_rep);
357EXPORT_SYMBOL(iowrite16_rep);
358EXPORT_SYMBOL(iowrite32_rep);
359
360#ifdef CONFIG_HAS_IOPORT_MAP
361/* Create a virtual mapping cookie for an IO port range */
362void __iomem *ioport_map(unsigned long port, unsigned int nr)
363{
364 if (port > PIO_MASK)
365 return NULL;
366 return (void __iomem *) (unsigned long) (port + PIO_OFFSET);
367}
368
369void ioport_unmap(void __iomem *addr)
370{
371 /* Nothing to do */
372}
373EXPORT_SYMBOL(ioport_map);
374EXPORT_SYMBOL(ioport_unmap);
375#endif /* CONFIG_HAS_IOPORT_MAP */
376
377#ifdef CONFIG_PCI
378/* Hide the details if this is a MMIO or PIO address space and just do what
379 * you expect in the correct way. */
380void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
381{
382 IO_COND(addr, /* nothing */, iounmap(addr));
383}
384EXPORT_SYMBOL(pci_iounmap);
385#endif /* CONFIG_PCI */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Implement the default iomap interfaces
4 *
5 * (C) Copyright 2004 Linus Torvalds
6 */
7#include <linux/pci.h>
8#include <linux/io.h>
9
10#include <linux/export.h>
11
12/*
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).
17 *
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.
21 *
22 * Architectures for which this is not true can't use this generic
23 * implementation and should do their own copy.
24 */
25
26#ifndef HAVE_ARCH_PIO_SIZE
27/*
28 * We encode the physical PIO addresses (0-0xffff) into the
29 * pointer by offsetting them with a constant (0x10000) and
30 * assuming that all the low addresses are always PIO. That means
31 * we can do some sanity checks on the low bits, and don't
32 * need to just take things for granted.
33 */
34#define PIO_OFFSET 0x10000UL
35#define PIO_MASK 0x0ffffUL
36#define PIO_RESERVED 0x40000UL
37#endif
38
39static void bad_io_access(unsigned long port, const char *access)
40{
41 static int count = 10;
42 if (count) {
43 count--;
44 WARN(1, KERN_ERR "Bad IO access at port %#lx (%s)\n", port, access);
45 }
46}
47
48/*
49 * Ugly macros are a way of life.
50 */
51#define IO_COND(addr, is_pio, is_mmio) do { \
52 unsigned long port = (unsigned long __force)addr; \
53 if (port >= PIO_RESERVED) { \
54 is_mmio; \
55 } else if (port > PIO_OFFSET) { \
56 port &= PIO_MASK; \
57 is_pio; \
58 } else \
59 bad_io_access(port, #is_pio ); \
60} while (0)
61
62#ifndef pio_read16be
63#define pio_read16be(port) swab16(inw(port))
64#define pio_read32be(port) swab32(inl(port))
65#endif
66
67#ifndef mmio_read16be
68#define mmio_read16be(addr) swab16(readw(addr))
69#define mmio_read32be(addr) swab32(readl(addr))
70#define mmio_read64be(addr) swab64(readq(addr))
71#endif
72
73unsigned int ioread8(const void __iomem *addr)
74{
75 IO_COND(addr, return inb(port), return readb(addr));
76 return 0xff;
77}
78unsigned int ioread16(const void __iomem *addr)
79{
80 IO_COND(addr, return inw(port), return readw(addr));
81 return 0xffff;
82}
83unsigned int ioread16be(const void __iomem *addr)
84{
85 IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr));
86 return 0xffff;
87}
88unsigned int ioread32(const void __iomem *addr)
89{
90 IO_COND(addr, return inl(port), return readl(addr));
91 return 0xffffffff;
92}
93unsigned int ioread32be(const void __iomem *addr)
94{
95 IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr));
96 return 0xffffffff;
97}
98EXPORT_SYMBOL(ioread8);
99EXPORT_SYMBOL(ioread16);
100EXPORT_SYMBOL(ioread16be);
101EXPORT_SYMBOL(ioread32);
102EXPORT_SYMBOL(ioread32be);
103
104#ifdef readq
105static u64 pio_read64_lo_hi(unsigned long port)
106{
107 u64 lo, hi;
108
109 lo = inl(port);
110 hi = inl(port + sizeof(u32));
111
112 return lo | (hi << 32);
113}
114
115static u64 pio_read64_hi_lo(unsigned long port)
116{
117 u64 lo, hi;
118
119 hi = inl(port + sizeof(u32));
120 lo = inl(port);
121
122 return lo | (hi << 32);
123}
124
125static u64 pio_read64be_lo_hi(unsigned long port)
126{
127 u64 lo, hi;
128
129 lo = pio_read32be(port + sizeof(u32));
130 hi = pio_read32be(port);
131
132 return lo | (hi << 32);
133}
134
135static u64 pio_read64be_hi_lo(unsigned long port)
136{
137 u64 lo, hi;
138
139 hi = pio_read32be(port);
140 lo = pio_read32be(port + sizeof(u32));
141
142 return lo | (hi << 32);
143}
144
145u64 ioread64_lo_hi(const void __iomem *addr)
146{
147 IO_COND(addr, return pio_read64_lo_hi(port), return readq(addr));
148 return 0xffffffffffffffffULL;
149}
150
151u64 ioread64_hi_lo(const void __iomem *addr)
152{
153 IO_COND(addr, return pio_read64_hi_lo(port), return readq(addr));
154 return 0xffffffffffffffffULL;
155}
156
157u64 ioread64be_lo_hi(const void __iomem *addr)
158{
159 IO_COND(addr, return pio_read64be_lo_hi(port),
160 return mmio_read64be(addr));
161 return 0xffffffffffffffffULL;
162}
163
164u64 ioread64be_hi_lo(const void __iomem *addr)
165{
166 IO_COND(addr, return pio_read64be_hi_lo(port),
167 return mmio_read64be(addr));
168 return 0xffffffffffffffffULL;
169}
170
171EXPORT_SYMBOL(ioread64_lo_hi);
172EXPORT_SYMBOL(ioread64_hi_lo);
173EXPORT_SYMBOL(ioread64be_lo_hi);
174EXPORT_SYMBOL(ioread64be_hi_lo);
175
176#endif /* readq */
177
178#ifndef pio_write16be
179#define pio_write16be(val,port) outw(swab16(val),port)
180#define pio_write32be(val,port) outl(swab32(val),port)
181#endif
182
183#ifndef mmio_write16be
184#define mmio_write16be(val,port) writew(swab16(val),port)
185#define mmio_write32be(val,port) writel(swab32(val),port)
186#define mmio_write64be(val,port) writeq(swab64(val),port)
187#endif
188
189void iowrite8(u8 val, void __iomem *addr)
190{
191 IO_COND(addr, outb(val,port), writeb(val, addr));
192}
193void iowrite16(u16 val, void __iomem *addr)
194{
195 IO_COND(addr, outw(val,port), writew(val, addr));
196}
197void iowrite16be(u16 val, void __iomem *addr)
198{
199 IO_COND(addr, pio_write16be(val,port), mmio_write16be(val, addr));
200}
201void iowrite32(u32 val, void __iomem *addr)
202{
203 IO_COND(addr, outl(val,port), writel(val, addr));
204}
205void iowrite32be(u32 val, void __iomem *addr)
206{
207 IO_COND(addr, pio_write32be(val,port), mmio_write32be(val, addr));
208}
209EXPORT_SYMBOL(iowrite8);
210EXPORT_SYMBOL(iowrite16);
211EXPORT_SYMBOL(iowrite16be);
212EXPORT_SYMBOL(iowrite32);
213EXPORT_SYMBOL(iowrite32be);
214
215#ifdef writeq
216static void pio_write64_lo_hi(u64 val, unsigned long port)
217{
218 outl(val, port);
219 outl(val >> 32, port + sizeof(u32));
220}
221
222static void pio_write64_hi_lo(u64 val, unsigned long port)
223{
224 outl(val >> 32, port + sizeof(u32));
225 outl(val, port);
226}
227
228static void pio_write64be_lo_hi(u64 val, unsigned long port)
229{
230 pio_write32be(val, port + sizeof(u32));
231 pio_write32be(val >> 32, port);
232}
233
234static void pio_write64be_hi_lo(u64 val, unsigned long port)
235{
236 pio_write32be(val >> 32, port);
237 pio_write32be(val, port + sizeof(u32));
238}
239
240void iowrite64_lo_hi(u64 val, void __iomem *addr)
241{
242 IO_COND(addr, pio_write64_lo_hi(val, port),
243 writeq(val, addr));
244}
245
246void iowrite64_hi_lo(u64 val, void __iomem *addr)
247{
248 IO_COND(addr, pio_write64_hi_lo(val, port),
249 writeq(val, addr));
250}
251
252void iowrite64be_lo_hi(u64 val, void __iomem *addr)
253{
254 IO_COND(addr, pio_write64be_lo_hi(val, port),
255 mmio_write64be(val, addr));
256}
257
258void iowrite64be_hi_lo(u64 val, void __iomem *addr)
259{
260 IO_COND(addr, pio_write64be_hi_lo(val, port),
261 mmio_write64be(val, addr));
262}
263
264EXPORT_SYMBOL(iowrite64_lo_hi);
265EXPORT_SYMBOL(iowrite64_hi_lo);
266EXPORT_SYMBOL(iowrite64be_lo_hi);
267EXPORT_SYMBOL(iowrite64be_hi_lo);
268
269#endif /* readq */
270
271/*
272 * These are the "repeat MMIO read/write" functions.
273 * Note the "__raw" accesses, since we don't want to
274 * convert to CPU byte order. We write in "IO byte
275 * order" (we also don't have IO barriers).
276 */
277#ifndef mmio_insb
278static inline void mmio_insb(const void __iomem *addr, u8 *dst, int count)
279{
280 while (--count >= 0) {
281 u8 data = __raw_readb(addr);
282 *dst = data;
283 dst++;
284 }
285}
286static inline void mmio_insw(const void __iomem *addr, u16 *dst, int count)
287{
288 while (--count >= 0) {
289 u16 data = __raw_readw(addr);
290 *dst = data;
291 dst++;
292 }
293}
294static inline void mmio_insl(const void __iomem *addr, u32 *dst, int count)
295{
296 while (--count >= 0) {
297 u32 data = __raw_readl(addr);
298 *dst = data;
299 dst++;
300 }
301}
302#endif
303
304#ifndef mmio_outsb
305static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
306{
307 while (--count >= 0) {
308 __raw_writeb(*src, addr);
309 src++;
310 }
311}
312static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
313{
314 while (--count >= 0) {
315 __raw_writew(*src, addr);
316 src++;
317 }
318}
319static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
320{
321 while (--count >= 0) {
322 __raw_writel(*src, addr);
323 src++;
324 }
325}
326#endif
327
328void ioread8_rep(const void __iomem *addr, void *dst, unsigned long count)
329{
330 IO_COND(addr, insb(port,dst,count), mmio_insb(addr, dst, count));
331}
332void ioread16_rep(const void __iomem *addr, void *dst, unsigned long count)
333{
334 IO_COND(addr, insw(port,dst,count), mmio_insw(addr, dst, count));
335}
336void ioread32_rep(const void __iomem *addr, void *dst, unsigned long count)
337{
338 IO_COND(addr, insl(port,dst,count), mmio_insl(addr, dst, count));
339}
340EXPORT_SYMBOL(ioread8_rep);
341EXPORT_SYMBOL(ioread16_rep);
342EXPORT_SYMBOL(ioread32_rep);
343
344void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
345{
346 IO_COND(addr, outsb(port, src, count), mmio_outsb(addr, src, count));
347}
348void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
349{
350 IO_COND(addr, outsw(port, src, count), mmio_outsw(addr, src, count));
351}
352void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
353{
354 IO_COND(addr, outsl(port, src,count), mmio_outsl(addr, src, count));
355}
356EXPORT_SYMBOL(iowrite8_rep);
357EXPORT_SYMBOL(iowrite16_rep);
358EXPORT_SYMBOL(iowrite32_rep);
359
360#ifdef CONFIG_HAS_IOPORT_MAP
361/* Create a virtual mapping cookie for an IO port range */
362void __iomem *ioport_map(unsigned long port, unsigned int nr)
363{
364 if (port > PIO_MASK)
365 return NULL;
366 return (void __iomem *) (unsigned long) (port + PIO_OFFSET);
367}
368
369void ioport_unmap(void __iomem *addr)
370{
371 /* Nothing to do */
372}
373EXPORT_SYMBOL(ioport_map);
374EXPORT_SYMBOL(ioport_unmap);
375#endif /* CONFIG_HAS_IOPORT_MAP */
376
377#ifdef CONFIG_PCI
378/* Hide the details if this is a MMIO or PIO address space and just do what
379 * you expect in the correct way. */
380void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
381{
382 IO_COND(addr, /* nothing */, iounmap(addr));
383}
384EXPORT_SYMBOL(pci_iounmap);
385#endif /* CONFIG_PCI */