[PATCH] aic7xxx_osm build fix
[cris-mirror.git] / include / asm-x86_64 / io.h
blob94202703fae2f267357bd0fcdefa5c9ffedc3dea
1 #ifndef _ASM_IO_H
2 #define _ASM_IO_H
4 #include <linux/config.h>
6 /*
7 * This file contains the definitions for the x86 IO instructions
8 * inb/inw/inl/outb/outw/outl and the "string versions" of the same
9 * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
10 * versions of the single-IO instructions (inb_p/inw_p/..).
12 * This file is not meant to be obfuscating: it's just complicated
13 * to (a) handle it all in a way that makes gcc able to optimize it
14 * as well as possible and (b) trying to avoid writing the same thing
15 * over and over again with slight variations and possibly making a
16 * mistake somewhere.
20 * Thanks to James van Artsdalen for a better timing-fix than
21 * the two short jumps: using outb's to a nonexistent port seems
22 * to guarantee better timings even on fast machines.
24 * On the other hand, I'd like to be sure of a non-existent port:
25 * I feel a bit unsafe about using 0x80 (should be safe, though)
27 * Linus
31 * Bit simplified and optimized by Jan Hubicka
32 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
34 * isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
35 * isa_read[wl] and isa_write[wl] fixed
36 * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
39 #define __SLOW_DOWN_IO "\noutb %%al,$0x80"
41 #ifdef REALLY_SLOW_IO
42 #define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
43 #else
44 #define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
45 #endif
48 * Talk about misusing macros..
50 #define __OUT1(s,x) \
51 extern inline void out##s(unsigned x value, unsigned short port) {
53 #define __OUT2(s,s1,s2) \
54 __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
56 #define __OUT(s,s1,x) \
57 __OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
58 __OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \
60 #define __IN1(s) \
61 extern inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
63 #define __IN2(s,s1,s2) \
64 __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
66 #define __IN(s,s1,i...) \
67 __IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
68 __IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
70 #define __INS(s) \
71 extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \
72 { __asm__ __volatile__ ("rep ; ins" #s \
73 : "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
75 #define __OUTS(s) \
76 extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
77 { __asm__ __volatile__ ("rep ; outs" #s \
78 : "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
80 #define RETURN_TYPE unsigned char
81 __IN(b,"")
82 #undef RETURN_TYPE
83 #define RETURN_TYPE unsigned short
84 __IN(w,"")
85 #undef RETURN_TYPE
86 #define RETURN_TYPE unsigned int
87 __IN(l,"")
88 #undef RETURN_TYPE
90 __OUT(b,"b",char)
91 __OUT(w,"w",short)
92 __OUT(l,,int)
94 __INS(b)
95 __INS(w)
96 __INS(l)
98 __OUTS(b)
99 __OUTS(w)
100 __OUTS(l)
102 #define IO_SPACE_LIMIT 0xffff
104 #if defined(__KERNEL__) && __x86_64__
106 #include <linux/vmalloc.h>
108 #ifndef __i386__
110 * Change virtual addresses to physical addresses and vv.
111 * These are pretty trivial
113 extern inline unsigned long virt_to_phys(volatile void * address)
115 return __pa(address);
118 extern inline void * phys_to_virt(unsigned long address)
120 return __va(address);
122 #endif
125 * Change "struct page" to physical address.
127 #ifdef CONFIG_DISCONTIGMEM
128 #include <asm/mmzone.h>
129 #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
130 #else
131 #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
132 #endif
134 #include <asm-generic/iomap.h>
136 extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
138 extern inline void __iomem * ioremap (unsigned long offset, unsigned long size)
140 return __ioremap(offset, size, 0);
144 * This one maps high address device memory and turns off caching for that area.
145 * it's useful if some control registers are in such an area and write combining
146 * or read caching is not desirable:
148 extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
149 extern void iounmap(volatile void __iomem *addr);
152 * ISA I/O bus memory addresses are 1:1 with the physical address.
154 #define isa_virt_to_bus virt_to_phys
155 #define isa_page_to_bus page_to_phys
156 #define isa_bus_to_virt phys_to_virt
159 * However PCI ones are not necessarily 1:1 and therefore these interfaces
160 * are forbidden in portable PCI drivers.
162 * Allow them on x86 for legacy drivers, though.
164 #define virt_to_bus virt_to_phys
165 #define bus_to_virt phys_to_virt
168 * readX/writeX() are used to access memory mapped devices. On some
169 * architectures the memory mapped IO stuff needs to be accessed
170 * differently. On the x86 architecture, we just read/write the
171 * memory location directly.
174 static inline __u8 __readb(const volatile void __iomem *addr)
176 return *(__force volatile __u8 *)addr;
178 static inline __u16 __readw(const volatile void __iomem *addr)
180 return *(__force volatile __u16 *)addr;
182 static inline __u32 __readl(const volatile void __iomem *addr)
184 return *(__force volatile __u32 *)addr;
186 static inline __u64 __readq(const volatile void __iomem *addr)
188 return *(__force volatile __u64 *)addr;
190 #define readb(x) __readb(x)
191 #define readw(x) __readw(x)
192 #define readl(x) __readl(x)
193 #define readq(x) __readq(x)
194 #define readb_relaxed(a) readb(a)
195 #define readw_relaxed(a) readw(a)
196 #define readl_relaxed(a) readl(a)
197 #define readq_relaxed(a) readq(a)
198 #define __raw_readb readb
199 #define __raw_readw readw
200 #define __raw_readl readl
201 #define __raw_readq readq
203 #define mmiowb()
205 #ifdef CONFIG_UNORDERED_IO
206 static inline void __writel(__u32 val, volatile void __iomem *addr)
208 volatile __u32 __iomem *target = addr;
209 asm volatile("movnti %1,%0"
210 : "=m" (*target)
211 : "r" (val) : "memory");
214 static inline void __writeq(__u64 val, volatile void __iomem *addr)
216 volatile __u64 __iomem *target = addr;
217 asm volatile("movnti %1,%0"
218 : "=m" (*target)
219 : "r" (val) : "memory");
221 #else
222 static inline void __writel(__u32 b, volatile void __iomem *addr)
224 *(__force volatile __u32 *)addr = b;
226 static inline void __writeq(__u64 b, volatile void __iomem *addr)
228 *(__force volatile __u64 *)addr = b;
230 #endif
231 static inline void __writeb(__u8 b, volatile void __iomem *addr)
233 *(__force volatile __u8 *)addr = b;
235 static inline void __writew(__u16 b, volatile void __iomem *addr)
237 *(__force volatile __u16 *)addr = b;
239 #define writeq(val,addr) __writeq((val),(addr))
240 #define writel(val,addr) __writel((val),(addr))
241 #define writew(val,addr) __writew((val),(addr))
242 #define writeb(val,addr) __writeb((val),(addr))
243 #define __raw_writeb writeb
244 #define __raw_writew writew
245 #define __raw_writel writel
246 #define __raw_writeq writeq
248 void __memcpy_fromio(void*,unsigned long,unsigned);
249 void __memcpy_toio(unsigned long,const void*,unsigned);
251 static inline void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len)
253 __memcpy_fromio(to,(unsigned long)from,len);
255 static inline void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len)
257 __memcpy_toio((unsigned long)to,from,len);
260 void memset_io(volatile void __iomem *a, int b, size_t c);
263 * ISA space is 'always mapped' on a typical x86 system, no need to
264 * explicitly ioremap() it. The fact that the ISA IO space is mapped
265 * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
266 * are physical addresses. The following constant pointer can be
267 * used as the IO-area pointer (it can be iounmapped as well, so the
268 * analogy with PCI is quite large):
270 #define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
272 #define isa_readb(a) readb(__ISA_IO_base + (a))
273 #define isa_readw(a) readw(__ISA_IO_base + (a))
274 #define isa_readl(a) readl(__ISA_IO_base + (a))
275 #define isa_writeb(b,a) writeb(b,__ISA_IO_base + (a))
276 #define isa_writew(w,a) writew(w,__ISA_IO_base + (a))
277 #define isa_writel(l,a) writel(l,__ISA_IO_base + (a))
278 #define isa_memset_io(a,b,c) memset_io(__ISA_IO_base + (a),(b),(c))
279 #define isa_memcpy_fromio(a,b,c) memcpy_fromio((a),__ISA_IO_base + (b),(c))
280 #define isa_memcpy_toio(a,b,c) memcpy_toio(__ISA_IO_base + (a),(b),(c))
284 * Again, x86-64 does not require mem IO specific function.
287 #define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(b),(c),(d))
288 #define isa_eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(__ISA_IO_base + (b)),(c),(d))
291 * check_signature - find BIOS signatures
292 * @io_addr: mmio address to check
293 * @signature: signature block
294 * @length: length of signature
296 * Perform a signature comparison with the mmio address io_addr. This
297 * address should have been obtained by ioremap.
298 * Returns 1 on a match.
301 static inline int check_signature(void __iomem *io_addr,
302 const unsigned char *signature, int length)
304 int retval = 0;
305 do {
306 if (readb(io_addr) != *signature)
307 goto out;
308 io_addr++;
309 signature++;
310 length--;
311 } while (length);
312 retval = 1;
313 out:
314 return retval;
317 /* Nothing to do */
319 #define dma_cache_inv(_start,_size) do { } while (0)
320 #define dma_cache_wback(_start,_size) do { } while (0)
321 #define dma_cache_wback_inv(_start,_size) do { } while (0)
323 #define flush_write_buffers()
325 extern int iommu_bio_merge;
326 #define BIO_VMERGE_BOUNDARY iommu_bio_merge
329 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
330 * access
332 #define xlate_dev_mem_ptr(p) __va(p)
335 * Convert a virtual cached pointer to an uncached pointer
337 #define xlate_dev_kmem_ptr(p) p
339 #endif /* __KERNEL__ */
341 #endif