tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef __ASM_AVR32_IO_H
2#define __ASM_AVR32_IO_H
3
4#include <linux/bug.h>
5#include <linux/kernel.h>
6#include <linux/string.h>
7#include <linux/types.h>
8
9#include <asm/addrspace.h>
10#include <asm/byteorder.h>
11
12#include <mach/io.h>
13
14/* virt_to_phys will only work when address is in P1 or P2 */
15static __inline__ unsigned long virt_to_phys(volatile void *address)
16{
17 return PHYSADDR(address);
18}
19
20static __inline__ void * phys_to_virt(unsigned long address)
21{
22 return (void *)P1SEGADDR(address);
23}
24
25#define cached_to_phys(addr) ((unsigned long)PHYSADDR(addr))
26#define uncached_to_phys(addr) ((unsigned long)PHYSADDR(addr))
27#define phys_to_cached(addr) ((void *)P1SEGADDR(addr))
28#define phys_to_uncached(addr) ((void *)P2SEGADDR(addr))
29
30/*
31 * Generic IO read/write. These perform native-endian accesses. Note
32 * that some architectures will want to re-define __raw_{read,write}w.
33 */
34extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen);
35extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
36extern void __raw_writesl(void __iomem *addr, const void *data, int longlen);
37
38extern void __raw_readsb(const void __iomem *addr, void *data, int bytelen);
39extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
40extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
41
42static inline void __raw_writeb(u8 v, volatile void __iomem *addr)
43{
44 *(volatile u8 __force *)addr = v;
45}
46static inline void __raw_writew(u16 v, volatile void __iomem *addr)
47{
48 *(volatile u16 __force *)addr = v;
49}
50static inline void __raw_writel(u32 v, volatile void __iomem *addr)
51{
52 *(volatile u32 __force *)addr = v;
53}
54
55static inline u8 __raw_readb(const volatile void __iomem *addr)
56{
57 return *(const volatile u8 __force *)addr;
58}
59static inline u16 __raw_readw(const volatile void __iomem *addr)
60{
61 return *(const volatile u16 __force *)addr;
62}
63static inline u32 __raw_readl(const volatile void __iomem *addr)
64{
65 return *(const volatile u32 __force *)addr;
66}
67
68/* Convert I/O port address to virtual address */
69#ifndef __io
70# define __io(p) ((void *)phys_to_uncached(p))
71#endif
72
73/*
74 * Not really sure about the best way to slow down I/O on
75 * AVR32. Defining it as a no-op until we have an actual test case.
76 */
77#define SLOW_DOWN_IO do { } while (0)
78
79#define __BUILD_MEMORY_SINGLE(pfx, bwl, type) \
80static inline void \
81pfx##write##bwl(type val, volatile void __iomem *addr) \
82{ \
83 volatile type *__addr; \
84 type __val; \
85 \
86 __addr = (void *)__swizzle_addr_##bwl((unsigned long)(addr)); \
87 __val = pfx##ioswab##bwl(__addr, val); \
88 \
89 BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
90 \
91 *__addr = __val; \
92} \
93 \
94static inline type pfx##read##bwl(const volatile void __iomem *addr) \
95{ \
96 volatile type *__addr; \
97 type __val; \
98 \
99 __addr = (void *)__swizzle_addr_##bwl((unsigned long)(addr)); \
100 \
101 BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
102 \
103 __val = *__addr; \
104 return pfx##ioswab##bwl(__addr, __val); \
105}
106
107#define __BUILD_IOPORT_SINGLE(pfx, bwl, type, p, slow) \
108static inline void pfx##out##bwl##p(type val, unsigned long port) \
109{ \
110 volatile type *__addr; \
111 type __val; \
112 \
113 __addr = __io(__swizzle_addr_##bwl(port)); \
114 __val = pfx##ioswab##bwl(__addr, val); \
115 \
116 BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
117 \
118 *__addr = __val; \
119 slow; \
120} \
121 \
122static inline type pfx##in##bwl##p(unsigned long port) \
123{ \
124 volatile type *__addr; \
125 type __val; \
126 \
127 __addr = __io(__swizzle_addr_##bwl(port)); \
128 \
129 BUILD_BUG_ON(sizeof(type) > sizeof(unsigned long)); \
130 \
131 __val = *__addr; \
132 slow; \
133 \
134 return pfx##ioswab##bwl(__addr, __val); \
135}
136
137#define __BUILD_MEMORY_PFX(bus, bwl, type) \
138 __BUILD_MEMORY_SINGLE(bus, bwl, type)
139
140#define BUILDIO_MEM(bwl, type) \
141 __BUILD_MEMORY_PFX(, bwl, type) \
142 __BUILD_MEMORY_PFX(__mem_, bwl, type)
143
144#define __BUILD_IOPORT_PFX(bus, bwl, type) \
145 __BUILD_IOPORT_SINGLE(bus, bwl, type, ,) \
146 __BUILD_IOPORT_SINGLE(bus, bwl, type, _p, SLOW_DOWN_IO)
147
148#define BUILDIO_IOPORT(bwl, type) \
149 __BUILD_IOPORT_PFX(, bwl, type) \
150 __BUILD_IOPORT_PFX(__mem_, bwl, type)
151
152BUILDIO_MEM(b, u8)
153BUILDIO_MEM(w, u16)
154BUILDIO_MEM(l, u32)
155
156BUILDIO_IOPORT(b, u8)
157BUILDIO_IOPORT(w, u16)
158BUILDIO_IOPORT(l, u32)
159
160#define readb_relaxed readb
161#define readw_relaxed readw
162#define readl_relaxed readl
163
164#define readb_be __raw_readb
165#define readw_be __raw_readw
166#define readl_be __raw_readl
167
168#define writeb_relaxed writeb
169#define writew_relaxed writew
170#define writel_relaxed writel
171
172#define writeb_be __raw_writeb
173#define writew_be __raw_writew
174#define writel_be __raw_writel
175
176#define __BUILD_MEMORY_STRING(bwl, type) \
177static inline void writes##bwl(volatile void __iomem *addr, \
178 const void *data, unsigned int count) \
179{ \
180 const type *__data = data; \
181 \
182 while (count--) \
183 __mem_write##bwl(*__data++, addr); \
184} \
185 \
186static inline void reads##bwl(const volatile void __iomem *addr, \
187 void *data, unsigned int count) \
188{ \
189 type *__data = data; \
190 \
191 while (count--) \
192 *__data++ = __mem_read##bwl(addr); \
193}
194
195#define __BUILD_IOPORT_STRING(bwl, type) \
196static inline void outs##bwl(unsigned long port, const void *data, \
197 unsigned int count) \
198{ \
199 const type *__data = data; \
200 \
201 while (count--) \
202 __mem_out##bwl(*__data++, port); \
203} \
204 \
205static inline void ins##bwl(unsigned long port, void *data, \
206 unsigned int count) \
207{ \
208 type *__data = data; \
209 \
210 while (count--) \
211 *__data++ = __mem_in##bwl(port); \
212}
213
214#define BUILDSTRING(bwl, type) \
215 __BUILD_MEMORY_STRING(bwl, type) \
216 __BUILD_IOPORT_STRING(bwl, type)
217
218BUILDSTRING(b, u8)
219BUILDSTRING(w, u16)
220BUILDSTRING(l, u32)
221
222/*
223 * io{read,write}{8,16,32} macros in both le (for PCI style consumers) and native be
224 */
225#ifndef ioread8
226
227#define ioread8(p) ((unsigned int)readb(p))
228
229#define ioread16(p) ((unsigned int)readw(p))
230#define ioread16be(p) ((unsigned int)__raw_readw(p))
231
232#define ioread32(p) ((unsigned int)readl(p))
233#define ioread32be(p) ((unsigned int)__raw_readl(p))
234
235#define iowrite8(v,p) writeb(v, p)
236
237#define iowrite16(v,p) writew(v, p)
238#define iowrite16be(v,p) __raw_writew(v, p)
239
240#define iowrite32(v,p) writel(v, p)
241#define iowrite32be(v,p) __raw_writel(v, p)
242
243#define ioread8_rep(p,d,c) readsb(p,d,c)
244#define ioread16_rep(p,d,c) readsw(p,d,c)
245#define ioread32_rep(p,d,c) readsl(p,d,c)
246
247#define iowrite8_rep(p,s,c) writesb(p,s,c)
248#define iowrite16_rep(p,s,c) writesw(p,s,c)
249#define iowrite32_rep(p,s,c) writesl(p,s,c)
250
251#endif
252
253static inline void memcpy_fromio(void * to, const volatile void __iomem *from,
254 unsigned long count)
255{
256 memcpy(to, (const void __force *)from, count);
257}
258
259static inline void memcpy_toio(volatile void __iomem *to, const void * from,
260 unsigned long count)
261{
262 memcpy((void __force *)to, from, count);
263}
264
265static inline void memset_io(volatile void __iomem *addr, unsigned char val,
266 unsigned long count)
267{
268 memset((void __force *)addr, val, count);
269}
270
271#define mmiowb()
272
273#define IO_SPACE_LIMIT 0xffffffff
274
275extern void __iomem *__ioremap(unsigned long offset, size_t size,
276 unsigned long flags);
277extern void __iounmap(void __iomem *addr);
278
279/*
280 * ioremap - map bus memory into CPU space
281 * @offset bus address of the memory
282 * @size size of the resource to map
283 *
284 * ioremap performs a platform specific sequence of operations to make
285 * bus memory CPU accessible via the readb/.../writel functions and
286 * the other mmio helpers. The returned address is not guaranteed to
287 * be usable directly as a virtual address.
288 */
289#define ioremap(offset, size) \
290 __ioremap((offset), (size), 0)
291
292#define ioremap_nocache(offset, size) \
293 __ioremap((offset), (size), 0)
294
295#define iounmap(addr) \
296 __iounmap(addr)
297
298#define cached(addr) P1SEGADDR(addr)
299#define uncached(addr) P2SEGADDR(addr)
300
301#define virt_to_bus virt_to_phys
302#define bus_to_virt phys_to_virt
303#define page_to_bus page_to_phys
304#define bus_to_page phys_to_page
305
306/*
307 * Create a virtual mapping cookie for an IO port range. There exists
308 * no such thing as port-based I/O on AVR32, so a regular ioremap()
309 * should do what we need.
310 */
311#define ioport_map(port, nr) ioremap(port, nr)
312#define ioport_unmap(port) iounmap(port)
313
314/*
315 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
316 * access
317 */
318#define xlate_dev_mem_ptr(p) __va(p)
319
320/*
321 * Convert a virtual cached pointer to an uncached pointer
322 */
323#define xlate_dev_kmem_ptr(p) p
324
325#endif /* __ASM_AVR32_IO_H */