~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/asm-generic/io.h

Version: ~ [ linux-5.15-rc6 ] ~ [ linux-5.14.14 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.75 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.155 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.213 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.252 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.287 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.289 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* Generic I/O port emulation, based on MN10300 code
  2  *
  3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  4  * Written by David Howells (dhowells@redhat.com)
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public Licence
  8  * as published by the Free Software Foundation; either version
  9  * 2 of the Licence, or (at your option) any later version.
 10  */
 11 #ifndef __ASM_GENERIC_IO_H
 12 #define __ASM_GENERIC_IO_H
 13 
 14 #include <asm/page.h> /* I/O is all done through memory accesses */
 15 #include <asm/cacheflush.h>
 16 #include <linux/types.h>
 17 
 18 #ifdef CONFIG_GENERIC_IOMAP
 19 #include <asm-generic/iomap.h>
 20 #endif
 21 
 22 #define mmiowb() do {} while (0)
 23 
 24 /*****************************************************************************/
 25 /*
 26  * readX/writeX() are used to access memory mapped devices. On some
 27  * architectures the memory mapped IO stuff needs to be accessed
 28  * differently. On the simple architectures, we just read/write the
 29  * memory location directly.
 30  */
 31 static inline u8 __raw_readb(const volatile void __iomem *addr)
 32 {
 33         return *(const volatile u8 __force *) addr;
 34 }
 35 
 36 static inline u16 __raw_readw(const volatile void __iomem *addr)
 37 {
 38         return *(const volatile u16 __force *) addr;
 39 }
 40 
 41 static inline u32 __raw_readl(const volatile void __iomem *addr)
 42 {
 43         return *(const volatile u32 __force *) addr;
 44 }
 45 
 46 #define readb __raw_readb
 47 #define readw(addr) __le16_to_cpu(__raw_readw(addr))
 48 #define readl(addr) __le32_to_cpu(__raw_readl(addr))
 49 
 50 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
 51 {
 52         *(volatile u8 __force *) addr = b;
 53 }
 54 
 55 static inline void __raw_writew(u16 b, volatile void __iomem *addr)
 56 {
 57         *(volatile u16 __force *) addr = b;
 58 }
 59 
 60 static inline void __raw_writel(u32 b, volatile void __iomem *addr)
 61 {
 62         *(volatile u32 __force *) addr = b;
 63 }
 64 
 65 #define writeb __raw_writeb
 66 #define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr)
 67 #define writel(b,addr) __raw_writel(__cpu_to_le32(b),addr)
 68 
 69 #ifdef CONFIG_64BIT
 70 static inline u64 __raw_readq(const volatile void __iomem *addr)
 71 {
 72         return *(const volatile u64 __force *) addr;
 73 }
 74 #define readq(addr) __le64_to_cpu(__raw_readq(addr))
 75 
 76 static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
 77 {
 78         *(volatile u64 __force *) addr = b;
 79 }
 80 #define writeq(b,addr) __raw_writeq(__cpu_to_le64(b),addr)
 81 #endif
 82 
 83 /*****************************************************************************/
 84 /*
 85  * traditional input/output functions
 86  */
 87 
 88 static inline u8 inb(unsigned long addr)
 89 {
 90         return readb((volatile void __iomem *) addr);
 91 }
 92 
 93 static inline u16 inw(unsigned long addr)
 94 {
 95         return readw((volatile void __iomem *) addr);
 96 }
 97 
 98 static inline u32 inl(unsigned long addr)
 99 {
100         return readl((volatile void __iomem *) addr);
101 }
102 
103 static inline void outb(u8 b, unsigned long addr)
104 {
105         writeb(b, (volatile void __iomem *) addr);
106 }
107 
108 static inline void outw(u16 b, unsigned long addr)
109 {
110         writew(b, (volatile void __iomem *) addr);
111 }
112 
113 static inline void outl(u32 b, unsigned long addr)
114 {
115         writel(b, (volatile void __iomem *) addr);
116 }
117 
118 #define inb_p(addr)     inb(addr)
119 #define inw_p(addr)     inw(addr)
120 #define inl_p(addr)     inl(addr)
121 #define outb_p(x, addr) outb((x), (addr))
122 #define outw_p(x, addr) outw((x), (addr))
123 #define outl_p(x, addr) outl((x), (addr))
124 
125 static inline void insb(unsigned long addr, void *buffer, int count)
126 {
127         if (count) {
128                 u8 *buf = buffer;
129                 do {
130                         u8 x = inb(addr);
131                         *buf++ = x;
132                 } while (--count);
133         }
134 }
135 
136 static inline void insw(unsigned long addr, void *buffer, int count)
137 {
138         if (count) {
139                 u16 *buf = buffer;
140                 do {
141                         u16 x = inw(addr);
142                         *buf++ = x;
143                 } while (--count);
144         }
145 }
146 
147 static inline void insl(unsigned long addr, void *buffer, int count)
148 {
149         if (count) {
150                 u32 *buf = buffer;
151                 do {
152                         u32 x = inl(addr);
153                         *buf++ = x;
154                 } while (--count);
155         }
156 }
157 
158 static inline void outsb(unsigned long addr, const void *buffer, int count)
159 {
160         if (count) {
161                 const u8 *buf = buffer;
162                 do {
163                         outb(*buf++, addr);
164                 } while (--count);
165         }
166 }
167 
168 static inline void outsw(unsigned long addr, const void *buffer, int count)
169 {
170         if (count) {
171                 const u16 *buf = buffer;
172                 do {
173                         outw(*buf++, addr);
174                 } while (--count);
175         }
176 }
177 
178 static inline void outsl(unsigned long addr, const void *buffer, int count)
179 {
180         if (count) {
181                 const u32 *buf = buffer;
182                 do {
183                         outl(*buf++, addr);
184                 } while (--count);
185         }
186 }
187 
188 #ifndef CONFIG_GENERIC_IOMAP
189 #define ioread8(addr)           readb(addr)
190 #define ioread16(addr)          readw(addr)
191 #define ioread32(addr)          readl(addr)
192 
193 #define iowrite8(v, addr)       writeb((v), (addr))
194 #define iowrite16(v, addr)      writew((v), (addr))
195 #define iowrite32(v, addr)      writel((v), (addr))
196 
197 #define ioread8_rep(p, dst, count) \
198         insb((unsigned long) (p), (dst), (count))
199 #define ioread16_rep(p, dst, count) \
200         insw((unsigned long) (p), (dst), (count))
201 #define ioread32_rep(p, dst, count) \
202         insl((unsigned long) (p), (dst), (count))
203 
204 #define iowrite8_rep(p, src, count) \
205         outsb((unsigned long) (p), (src), (count))
206 #define iowrite16_rep(p, src, count) \
207         outsw((unsigned long) (p), (src), (count))
208 #define iowrite32_rep(p, src, count) \
209         outsl((unsigned long) (p), (src), (count))
210 #endif /* CONFIG_GENERIC_IOMAP */
211 
212 
213 #define IO_SPACE_LIMIT 0xffffffff
214 
215 #ifdef __KERNEL__
216 
217 #include <linux/vmalloc.h>
218 #define __io_virt(x) ((void __force *) (x))
219 
220 #ifndef CONFIG_GENERIC_IOMAP
221 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
222 struct pci_dev;
223 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
224 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
225 {
226 }
227 #endif /* CONFIG_GENERIC_IOMAP */
228 
229 /*
230  * Change virtual addresses to physical addresses and vv.
231  * These are pretty trivial
232  */
233 static inline unsigned long virt_to_phys(volatile void *address)
234 {
235         return __pa((unsigned long)address);
236 }
237 
238 static inline void *phys_to_virt(unsigned long address)
239 {
240         return __va(address);
241 }
242 
243 /*
244  * Change "struct page" to physical address.
245  */
246 static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
247 {
248         return (void __iomem*) (unsigned long)offset;
249 }
250 
251 #define __ioremap(offset, size, flags)  ioremap(offset, size)
252 
253 #ifndef ioremap_nocache
254 #define ioremap_nocache ioremap
255 #endif
256 
257 #ifndef ioremap_wc
258 #define ioremap_wc ioremap_nocache
259 #endif
260 
261 static inline void iounmap(void *addr)
262 {
263 }
264 
265 #ifndef CONFIG_GENERIC_IOMAP
266 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
267 {
268         return (void __iomem *) port;
269 }
270 
271 static inline void ioport_unmap(void __iomem *p)
272 {
273 }
274 #else /* CONFIG_GENERIC_IOMAP */
275 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
276 extern void ioport_unmap(void __iomem *p);
277 #endif /* CONFIG_GENERIC_IOMAP */
278 
279 #define xlate_dev_kmem_ptr(p)   p
280 #define xlate_dev_mem_ptr(p)    ((void *) (p))
281 
282 #ifndef virt_to_bus
283 static inline unsigned long virt_to_bus(volatile void *address)
284 {
285         return ((unsigned long) address);
286 }
287 
288 static inline void *bus_to_virt(unsigned long address)
289 {
290         return (void *) address;
291 }
292 #endif
293 
294 #define memset_io(a, b, c)      memset(__io_virt(a), (b), (c))
295 #define memcpy_fromio(a, b, c)  memcpy((a), __io_virt(b), (c))
296 #define memcpy_toio(a, b, c)    memcpy(__io_virt(a), (b), (c))
297 
298 #endif /* __KERNEL__ */
299 
300 #endif /* __ASM_GENERIC_IO_H */
301 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp