Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / arch / sparc / include / asm / io_32.h
blobc2ced21c9dc19a7c284960d6a180f30345e5120f
1 #ifndef __SPARC_IO_H
2 #define __SPARC_IO_H
4 #include <linux/kernel.h>
5 #include <linux/types.h>
6 #include <linux/ioport.h> /* struct resource */
8 #include <asm/page.h> /* IO address mapping routines need this */
9 #include <asm/system.h>
11 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
13 static inline u32 flip_dword (u32 l)
15 return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff);
18 static inline u16 flip_word (u16 w)
20 return ((w&0xff) << 8) | ((w>>8)&0xff);
23 #define mmiowb()
26 * Memory mapped I/O to PCI
29 static inline u8 __raw_readb(const volatile void __iomem *addr)
31 return *(__force volatile u8 *)addr;
34 static inline u16 __raw_readw(const volatile void __iomem *addr)
36 return *(__force volatile u16 *)addr;
39 static inline u32 __raw_readl(const volatile void __iomem *addr)
41 return *(__force volatile u32 *)addr;
44 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
46 *(__force volatile u8 *)addr = b;
49 static inline void __raw_writew(u16 w, volatile void __iomem *addr)
51 *(__force volatile u16 *)addr = w;
54 static inline void __raw_writel(u32 l, volatile void __iomem *addr)
56 *(__force volatile u32 *)addr = l;
59 static inline u8 __readb(const volatile void __iomem *addr)
61 return *(__force volatile u8 *)addr;
64 static inline u16 __readw(const volatile void __iomem *addr)
66 return flip_word(*(__force volatile u16 *)addr);
69 static inline u32 __readl(const volatile void __iomem *addr)
71 return flip_dword(*(__force volatile u32 *)addr);
74 static inline void __writeb(u8 b, volatile void __iomem *addr)
76 *(__force volatile u8 *)addr = b;
79 static inline void __writew(u16 w, volatile void __iomem *addr)
81 *(__force volatile u16 *)addr = flip_word(w);
84 static inline void __writel(u32 l, volatile void __iomem *addr)
86 *(__force volatile u32 *)addr = flip_dword(l);
89 #define readb(__addr) __readb(__addr)
90 #define readw(__addr) __readw(__addr)
91 #define readl(__addr) __readl(__addr)
92 #define readb_relaxed(__addr) readb(__addr)
93 #define readw_relaxed(__addr) readw(__addr)
94 #define readl_relaxed(__addr) readl(__addr)
96 #define writeb(__b, __addr) __writeb((__b),(__addr))
97 #define writew(__w, __addr) __writew((__w),(__addr))
98 #define writel(__l, __addr) __writel((__l),(__addr))
101 * I/O space operations
103 * Arrangement on a Sun is somewhat complicated.
105 * First of all, we want to use standard Linux drivers
106 * for keyboard, PC serial, etc. These drivers think
107 * they access I/O space and use inb/outb.
108 * On the other hand, EBus bridge accepts PCI *memory*
109 * cycles and converts them into ISA *I/O* cycles.
110 * Ergo, we want inb & outb to generate PCI memory cycles.
112 * If we want to issue PCI *I/O* cycles, we do this
113 * with a low 64K fixed window in PCIC. This window gets
114 * mapped somewhere into virtual kernel space and we
115 * can use inb/outb again.
117 #define inb_local(__addr) __readb((void __iomem *)(unsigned long)(__addr))
118 #define inb(__addr) __readb((void __iomem *)(unsigned long)(__addr))
119 #define inw(__addr) __readw((void __iomem *)(unsigned long)(__addr))
120 #define inl(__addr) __readl((void __iomem *)(unsigned long)(__addr))
122 #define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
123 #define outb(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
124 #define outw(__w, __addr) __writew(__w, (void __iomem *)(unsigned long)(__addr))
125 #define outl(__l, __addr) __writel(__l, (void __iomem *)(unsigned long)(__addr))
127 #define inb_p(__addr) inb(__addr)
128 #define outb_p(__b, __addr) outb(__b, __addr)
129 #define inw_p(__addr) inw(__addr)
130 #define outw_p(__w, __addr) outw(__w, __addr)
131 #define inl_p(__addr) inl(__addr)
132 #define outl_p(__l, __addr) outl(__l, __addr)
134 void outsb(unsigned long addr, const void *src, unsigned long cnt);
135 void outsw(unsigned long addr, const void *src, unsigned long cnt);
136 void outsl(unsigned long addr, const void *src, unsigned long cnt);
137 void insb(unsigned long addr, void *dst, unsigned long count);
138 void insw(unsigned long addr, void *dst, unsigned long count);
139 void insl(unsigned long addr, void *dst, unsigned long count);
141 #define IO_SPACE_LIMIT 0xffffffff
144 * SBus accessors.
146 * SBus has only one, memory mapped, I/O space.
147 * We do not need to flip bytes for SBus of course.
149 static inline u8 _sbus_readb(const volatile void __iomem *addr)
151 return *(__force volatile u8 *)addr;
154 static inline u16 _sbus_readw(const volatile void __iomem *addr)
156 return *(__force volatile u16 *)addr;
159 static inline u32 _sbus_readl(const volatile void __iomem *addr)
161 return *(__force volatile u32 *)addr;
164 static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
166 *(__force volatile u8 *)addr = b;
169 static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
171 *(__force volatile u16 *)addr = w;
174 static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
176 *(__force volatile u32 *)addr = l;
180 * The only reason for #define's is to hide casts to unsigned long.
182 #define sbus_readb(__addr) _sbus_readb(__addr)
183 #define sbus_readw(__addr) _sbus_readw(__addr)
184 #define sbus_readl(__addr) _sbus_readl(__addr)
185 #define sbus_writeb(__b, __addr) _sbus_writeb(__b, __addr)
186 #define sbus_writew(__w, __addr) _sbus_writew(__w, __addr)
187 #define sbus_writel(__l, __addr) _sbus_writel(__l, __addr)
189 static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n)
191 while(n--) {
192 sbus_writeb(c, __dst);
193 __dst++;
197 static inline void
198 _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
200 volatile void __iomem *d = dst;
202 while (n--) {
203 writeb(c, d);
204 d++;
208 #define memset_io(d,c,sz) _memset_io(d,c,sz)
210 static inline void
211 _sbus_memcpy_fromio(void *dst, const volatile void __iomem *src,
212 __kernel_size_t n)
214 char *d = dst;
216 while (n--) {
217 char tmp = sbus_readb(src);
218 *d++ = tmp;
219 src++;
223 #define sbus_memcpy_fromio(d, s, sz) _sbus_memcpy_fromio(d, s, sz)
225 static inline void
226 _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
228 char *d = dst;
230 while (n--) {
231 char tmp = readb(src);
232 *d++ = tmp;
233 src++;
237 #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
239 static inline void
240 _sbus_memcpy_toio(volatile void __iomem *dst, const void *src,
241 __kernel_size_t n)
243 const char *s = src;
244 volatile void __iomem *d = dst;
246 while (n--) {
247 char tmp = *s++;
248 sbus_writeb(tmp, d);
249 d++;
253 #define sbus_memcpy_toio(d, s, sz) _sbus_memcpy_toio(d, s, sz)
255 static inline void
256 _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
258 const char *s = src;
259 volatile void __iomem *d = dst;
261 while (n--) {
262 char tmp = *s++;
263 writeb(tmp, d);
264 d++;
268 #define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz)
270 #ifdef __KERNEL__
273 * Bus number may be embedded in the higher bits of the physical address.
274 * This is why we have no bus number argument to ioremap().
276 extern void __iomem *ioremap(unsigned long offset, unsigned long size);
277 #define ioremap_nocache(X,Y) ioremap((X),(Y))
278 #define ioremap_wc(X,Y) ioremap((X),(Y))
279 extern void iounmap(volatile void __iomem *addr);
281 #define ioread8(X) readb(X)
282 #define ioread16(X) readw(X)
283 #define ioread16be(X) __raw_readw(X)
284 #define ioread32(X) readl(X)
285 #define ioread32be(X) __raw_readl(X)
286 #define iowrite8(val,X) writeb(val,X)
287 #define iowrite16(val,X) writew(val,X)
288 #define iowrite16be(val,X) __raw_writew(val,X)
289 #define iowrite32(val,X) writel(val,X)
290 #define iowrite32be(val,X) __raw_writel(val,X)
292 static inline void ioread8_rep(void __iomem *port, void *buf, unsigned long count)
294 insb((unsigned long __force)port, buf, count);
296 static inline void ioread16_rep(void __iomem *port, void *buf, unsigned long count)
298 insw((unsigned long __force)port, buf, count);
301 static inline void ioread32_rep(void __iomem *port, void *buf, unsigned long count)
303 insl((unsigned long __force)port, buf, count);
306 static inline void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count)
308 outsb((unsigned long __force)port, buf, count);
311 static inline void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count)
313 outsw((unsigned long __force)port, buf, count);
316 static inline void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count)
318 outsl((unsigned long __force)port, buf, count);
321 /* Create a virtual mapping cookie for an IO port range */
322 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
323 extern void ioport_unmap(void __iomem *);
325 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
326 struct pci_dev;
327 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
328 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
331 * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
332 * so rtc_port is static in it. This should not change unless a new
333 * hardware pops up.
335 #define RTC_PORT(x) (rtc_port + (x))
336 #define RTC_ALWAYS_BCD 0
338 static inline int sbus_can_dma_64bit(void)
340 return 0; /* actually, sparc_cpu_model==sun4d */
342 static inline int sbus_can_burst64(void)
344 return 0; /* actually, sparc_cpu_model==sun4d */
346 struct device;
347 extern void sbus_set_sbus64(struct device *, int);
349 #endif
351 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1
354 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
355 * access
357 #define xlate_dev_mem_ptr(p) __va(p)
360 * Convert a virtual cached pointer to an uncached pointer
362 #define xlate_dev_kmem_ptr(p) p
364 #endif /* !(__SPARC_IO_H) */