1#ifndef _ASM_IO_H
2#define _ASM_IO_H
3
4#include <linux/string.h>
5#include <linux/compiler.h>
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40#define IO_SPACE_LIMIT 0xffff
41
42#define XQUAD_PORTIO_BASE 0xfe400000
43#define XQUAD_PORTIO_QUAD 0x40000
44
45#ifdef __KERNEL__
46
47#include <asm-generic/iomap.h>
48
49#include <linux/vmalloc.h>
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54
55#define xlate_dev_mem_ptr(p) __va(p)
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60#define xlate_dev_kmem_ptr(p) p
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75static inline unsigned long virt_to_phys(volatile void * address)
76{
77 return __pa(address);
78}
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92
93static inline void * phys_to_virt(unsigned long address)
94{
95 return __va(address);
96}
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100
101#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
102
103extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
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120static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
121{
122 return __ioremap(offset, size, 0);
123}
124
125extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
126extern void iounmap(volatile void __iomem *addr);
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133extern void *bt_ioremap(unsigned long offset, unsigned long size);
134extern void bt_iounmap(void *addr, unsigned long size);
135extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
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137
138#define dmi_ioremap bt_ioremap
139#define dmi_iounmap bt_iounmap
140#define dmi_alloc alloc_bootmem
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144
145#define isa_virt_to_bus virt_to_phys
146#define isa_page_to_bus page_to_phys
147#define isa_bus_to_virt phys_to_virt
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155#define virt_to_bus virt_to_phys
156#define bus_to_virt phys_to_virt
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164
165static inline unsigned char readb(const volatile void __iomem *addr)
166{
167 return *(volatile unsigned char __force *) addr;
168}
169static inline unsigned short readw(const volatile void __iomem *addr)
170{
171 return *(volatile unsigned short __force *) addr;
172}
173static inline unsigned int readl(const volatile void __iomem *addr)
174{
175 return *(volatile unsigned int __force *) addr;
176}
177#define readb_relaxed(addr) readb(addr)
178#define readw_relaxed(addr) readw(addr)
179#define readl_relaxed(addr) readl(addr)
180#define __raw_readb readb
181#define __raw_readw readw
182#define __raw_readl readl
183
184static inline void writeb(unsigned char b, volatile void __iomem *addr)
185{
186 *(volatile unsigned char __force *) addr = b;
187}
188static inline void writew(unsigned short b, volatile void __iomem *addr)
189{
190 *(volatile unsigned short __force *) addr = b;
191}
192static inline void writel(unsigned int b, volatile void __iomem *addr)
193{
194 *(volatile unsigned int __force *) addr = b;
195}
196#define __raw_writeb writeb
197#define __raw_writew writew
198#define __raw_writel writel
199
200#define mmiowb()
201
202static inline void
203memset_io(volatile void __iomem *addr, unsigned char val, int count)
204{
205 memset((void __force *)addr, val, count);
206}
207
208static inline void
209memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
210{
211 __memcpy(dst, (const void __force *)src, count);
212}
213
214static inline void
215memcpy_toio(volatile void __iomem *dst, const void *src, int count)
216{
217 __memcpy((void __force *)dst, src, count);
218}
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228#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
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238#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
239
240static inline void flush_write_buffers(void)
241{
242 __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory");
243}
244
245#else
246
247#define flush_write_buffers() do { } while (0)
248
249#endif
250
251#endif
252
253static inline void native_io_delay(void)
254{
255 asm volatile("outb %%al,$0x80" : : : "memory");
256}
257
258#if defined(CONFIG_PARAVIRT)
259#include <asm/paravirt.h>
260#else
261
262static inline void slow_down_io(void) {
263 native_io_delay();
264#ifdef REALLY_SLOW_IO
265 native_io_delay();
266 native_io_delay();
267 native_io_delay();
268#endif
269}
270
271#endif
272
273#ifdef CONFIG_X86_NUMAQ
274extern void *xquad_portio;
275#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
276#define __BUILDIO(bwl,bw,type) \
277static inline void out##bwl##_quad(unsigned type value, int port, int quad) { \
278 if (xquad_portio) \
279 write##bwl(value, XQUAD_PORT_ADDR(port, quad)); \
280 else \
281 out##bwl##_local(value, port); \
282} \
283static inline void out##bwl(unsigned type value, int port) { \
284 out##bwl##_quad(value, port, 0); \
285} \
286static inline unsigned type in##bwl##_quad(int port, int quad) { \
287 if (xquad_portio) \
288 return read##bwl(XQUAD_PORT_ADDR(port, quad)); \
289 else \
290 return in##bwl##_local(port); \
291} \
292static inline unsigned type in##bwl(int port) { \
293 return in##bwl##_quad(port, 0); \
294}
295#else
296#define __BUILDIO(bwl,bw,type) \
297static inline void out##bwl(unsigned type value, int port) { \
298 out##bwl##_local(value, port); \
299} \
300static inline unsigned type in##bwl(int port) { \
301 return in##bwl##_local(port); \
302}
303#endif
304
305
306#define BUILDIO(bwl,bw,type) \
307static inline void out##bwl##_local(unsigned type value, int port) { \
308 __asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
309} \
310static inline unsigned type in##bwl##_local(int port) { \
311 unsigned type value; \
312 __asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
313 return value; \
314} \
315static inline void out##bwl##_local_p(unsigned type value, int port) { \
316 out##bwl##_local(value, port); \
317 slow_down_io(); \
318} \
319static inline unsigned type in##bwl##_local_p(int port) { \
320 unsigned type value = in##bwl##_local(port); \
321 slow_down_io(); \
322 return value; \
323} \
324__BUILDIO(bwl,bw,type) \
325static inline void out##bwl##_p(unsigned type value, int port) { \
326 out##bwl(value, port); \
327 slow_down_io(); \
328} \
329static inline unsigned type in##bwl##_p(int port) { \
330 unsigned type value = in##bwl(port); \
331 slow_down_io(); \
332 return value; \
333} \
334static inline void outs##bwl(int port, const void *addr, unsigned long count) { \
335 __asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \
336} \
337static inline void ins##bwl(int port, void *addr, unsigned long count) { \
338 __asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \
339}
340
341BUILDIO(b,b,char)
342BUILDIO(w,w,short)
343BUILDIO(l,,int)
344
345#endif
346