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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_IA64_IO_H
2#define _ASM_IA64_IO_H
3
4/*
5 * This file contains the definitions for the emulated IO instructions
6 * inb/inw/inl/outb/outw/outl and the "string versions" of the same
7 * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
8 * versions of the single-IO instructions (inb_p/inw_p/..).
9 *
10 * This file is not meant to be obfuscating: it's just complicated to
11 * (a) handle it all in a way that makes gcc able to optimize it as
12 * well as possible and (b) trying to avoid writing the same thing
13 * over and over again with slight variations and possibly making a
14 * mistake somewhere.
15 *
16 * Copyright (C) 1998-2003 Hewlett-Packard Co
17 * David Mosberger-Tang <davidm@hpl.hp.com>
18 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
19 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
20 */
21
James Bottomley8a549f82008-08-22 16:15:22 -050022#include <asm/unaligned.h>
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024/* We don't use IO slowdowns on the ia64, but.. */
25#define __SLOW_DOWN_IO do { } while (0)
26#define SLOW_DOWN_IO do { } while (0)
27
Peter Chubb0a41e252005-08-16 19:54:00 -070028#define __IA64_UNCACHED_OFFSET RGN_BASE(RGN_UNCACHED)
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30/*
31 * The legacy I/O space defined by the ia64 architecture supports only 65536 ports, but
32 * large machines may have multiple other I/O spaces so we can't place any a priori limit
33 * on IO_SPACE_LIMIT. These additional spaces are described in ACPI.
34 */
35#define IO_SPACE_LIMIT 0xffffffffffffffffUL
36
John Keller8ea60912006-10-04 16:49:25 -050037#define MAX_IO_SPACES_BITS 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#define MAX_IO_SPACES (1UL << MAX_IO_SPACES_BITS)
39#define IO_SPACE_BITS 24
40#define IO_SPACE_SIZE (1UL << IO_SPACE_BITS)
41
42#define IO_SPACE_NR(port) ((port) >> IO_SPACE_BITS)
43#define IO_SPACE_BASE(space) ((space) << IO_SPACE_BITS)
44#define IO_SPACE_PORT(port) ((port) & (IO_SPACE_SIZE - 1))
45
Bjorn Helgaasb5f36162005-08-23 09:24:00 -070046#define IO_SPACE_SPARSE_ENCODING(p) ((((p) >> 2) << 12) | ((p) & 0xfff))
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48struct io_space {
49 unsigned long mmio_base; /* base in MMIO space */
50 int sparse;
51};
52
53extern struct io_space io_space[];
54extern unsigned int num_io_spaces;
55
56# ifdef __KERNEL__
57
58/*
59 * All MMIO iomem cookies are in region 6; anything less is a PIO cookie:
60 * 0xCxxxxxxxxxxxxxxx MMIO cookie (return from ioremap)
61 * 0x000000001SPPPPPP PIO cookie (S=space number, P..P=port)
62 *
63 * ioread/writeX() uses the leading 1 in PIO cookies (PIO_OFFSET) to catch
64 * code that uses bare port numbers without the prerequisite pci_iomap().
65 */
66#define PIO_OFFSET (1UL << (MAX_IO_SPACES_BITS + IO_SPACE_BITS))
67#define PIO_MASK (PIO_OFFSET - 1)
68#define PIO_RESERVED __IA64_UNCACHED_OFFSET
69#define HAVE_ARCH_PIO_SIZE
70
71#include <asm/intrinsics.h>
72#include <asm/machvec.h>
73#include <asm/page.h>
74#include <asm/system.h>
75#include <asm-generic/iomap.h>
76
77/*
78 * Change virtual addresses to physical addresses and vv.
79 */
80static inline unsigned long
81virt_to_phys (volatile void *address)
82{
83 return (unsigned long) address - PAGE_OFFSET;
84}
85
86static inline void*
87phys_to_virt (unsigned long address)
88{
89 return (void *) (address + PAGE_OFFSET);
90}
91
92#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
Bjorn Helgaas32e62c62006-05-05 17:19:50 -060093extern u64 kern_mem_attribute (unsigned long phys_addr, unsigned long size);
Bjorn Helgaas136939a2006-03-26 01:37:05 -080094extern int valid_phys_addr_range (unsigned long addr, size_t count); /* efi.c */
Lennert Buytenhek06c67be2006-07-10 04:45:27 -070095extern int valid_mmap_phys_addr_range (unsigned long pfn, size_t count);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97/*
98 * The following two macros are deprecated and scheduled for removal.
99 * Please use the PCI-DMA interface defined in <asm/pci.h> instead.
100 */
101#define bus_to_virt phys_to_virt
102#define virt_to_bus virt_to_phys
103#define page_to_bus page_to_phys
104
105# endif /* KERNEL */
106
107/*
108 * Memory fence w/accept. This should never be used in code that is
109 * not IA-64 specific.
110 */
111#define __ia64_mf_a() ia64_mfa()
112
113/**
114 * ___ia64_mmiowb - I/O write barrier
115 *
116 * Ensure ordering of I/O space writes. This will make sure that writes
117 * following the barrier will arrive after all previous writes. For most
118 * ia64 platforms, this is a simple 'mf.a' instruction.
119 *
120 * See Documentation/DocBook/deviceiobook.tmpl for more information.
121 */
122static inline void ___ia64_mmiowb(void)
123{
124 ia64_mfa();
125}
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127static inline void*
128__ia64_mk_io_addr (unsigned long port)
129{
130 struct io_space *space;
131 unsigned long offset;
132
133 space = &io_space[IO_SPACE_NR(port)];
134 port = IO_SPACE_PORT(port);
135 if (space->sparse)
136 offset = IO_SPACE_SPARSE_ENCODING(port);
137 else
138 offset = port;
139
140 return (void *) (space->mmio_base | offset);
141}
142
143#define __ia64_inb ___ia64_inb
144#define __ia64_inw ___ia64_inw
145#define __ia64_inl ___ia64_inl
146#define __ia64_outb ___ia64_outb
147#define __ia64_outw ___ia64_outw
148#define __ia64_outl ___ia64_outl
149#define __ia64_readb ___ia64_readb
150#define __ia64_readw ___ia64_readw
151#define __ia64_readl ___ia64_readl
152#define __ia64_readq ___ia64_readq
153#define __ia64_readb_relaxed ___ia64_readb
154#define __ia64_readw_relaxed ___ia64_readw
155#define __ia64_readl_relaxed ___ia64_readl
156#define __ia64_readq_relaxed ___ia64_readq
157#define __ia64_writeb ___ia64_writeb
158#define __ia64_writew ___ia64_writew
159#define __ia64_writel ___ia64_writel
160#define __ia64_writeq ___ia64_writeq
161#define __ia64_mmiowb ___ia64_mmiowb
162
163/*
164 * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access to ensure
165 * that the access has completed before executing other I/O accesses. Since we're doing
166 * the accesses through an uncachable (UC) translation, the CPU will execute them in
167 * program order. However, we still need to tell the compiler not to shuffle them around
168 * during optimization, which is why we use "volatile" pointers.
169 */
170
171static inline unsigned int
172___ia64_inb (unsigned long port)
173{
174 volatile unsigned char *addr = __ia64_mk_io_addr(port);
175 unsigned char ret;
176
177 ret = *addr;
178 __ia64_mf_a();
179 return ret;
180}
181
182static inline unsigned int
183___ia64_inw (unsigned long port)
184{
185 volatile unsigned short *addr = __ia64_mk_io_addr(port);
186 unsigned short ret;
187
188 ret = *addr;
189 __ia64_mf_a();
190 return ret;
191}
192
193static inline unsigned int
194___ia64_inl (unsigned long port)
195{
196 volatile unsigned int *addr = __ia64_mk_io_addr(port);
197 unsigned int ret;
198
199 ret = *addr;
200 __ia64_mf_a();
201 return ret;
202}
203
204static inline void
205___ia64_outb (unsigned char val, unsigned long port)
206{
207 volatile unsigned char *addr = __ia64_mk_io_addr(port);
208
209 *addr = val;
210 __ia64_mf_a();
211}
212
213static inline void
214___ia64_outw (unsigned short val, unsigned long port)
215{
216 volatile unsigned short *addr = __ia64_mk_io_addr(port);
217
218 *addr = val;
219 __ia64_mf_a();
220}
221
222static inline void
223___ia64_outl (unsigned int val, unsigned long port)
224{
225 volatile unsigned int *addr = __ia64_mk_io_addr(port);
226
227 *addr = val;
228 __ia64_mf_a();
229}
230
231static inline void
232__insb (unsigned long port, void *dst, unsigned long count)
233{
234 unsigned char *dp = dst;
235
236 while (count--)
237 *dp++ = platform_inb(port);
238}
239
240static inline void
241__insw (unsigned long port, void *dst, unsigned long count)
242{
243 unsigned short *dp = dst;
244
245 while (count--)
James Bottomley8a549f82008-08-22 16:15:22 -0500246 put_unaligned(platform_inw(port), dp++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247}
248
249static inline void
250__insl (unsigned long port, void *dst, unsigned long count)
251{
252 unsigned int *dp = dst;
253
254 while (count--)
James Bottomley8a549f82008-08-22 16:15:22 -0500255 put_unaligned(platform_inl(port), dp++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256}
257
258static inline void
259__outsb (unsigned long port, const void *src, unsigned long count)
260{
261 const unsigned char *sp = src;
262
263 while (count--)
264 platform_outb(*sp++, port);
265}
266
267static inline void
268__outsw (unsigned long port, const void *src, unsigned long count)
269{
270 const unsigned short *sp = src;
271
272 while (count--)
James Bottomley8a549f82008-08-22 16:15:22 -0500273 platform_outw(get_unaligned(sp++), port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274}
275
276static inline void
277__outsl (unsigned long port, const void *src, unsigned long count)
278{
279 const unsigned int *sp = src;
280
281 while (count--)
James Bottomley8a549f82008-08-22 16:15:22 -0500282 platform_outl(get_unaligned(sp++), port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
285/*
286 * Unfortunately, some platforms are broken and do not follow the IA-64 architecture
287 * specification regarding legacy I/O support. Thus, we have to make these operations
288 * platform dependent...
289 */
290#define __inb platform_inb
291#define __inw platform_inw
292#define __inl platform_inl
293#define __outb platform_outb
294#define __outw platform_outw
295#define __outl platform_outl
296#define __mmiowb platform_mmiowb
297
298#define inb(p) __inb(p)
299#define inw(p) __inw(p)
300#define inl(p) __inl(p)
301#define insb(p,d,c) __insb(p,d,c)
302#define insw(p,d,c) __insw(p,d,c)
303#define insl(p,d,c) __insl(p,d,c)
304#define outb(v,p) __outb(v,p)
305#define outw(v,p) __outw(v,p)
306#define outl(v,p) __outl(v,p)
307#define outsb(p,s,c) __outsb(p,s,c)
308#define outsw(p,s,c) __outsw(p,s,c)
309#define outsl(p,s,c) __outsl(p,s,c)
310#define mmiowb() __mmiowb()
311
312/*
313 * The address passed to these functions are ioremap()ped already.
314 *
315 * We need these to be machine vectors since some platforms don't provide
316 * DMA coherence via PIO reads (PCI drivers and the spec imply that this is
317 * a good idea). Writes are ok though for all existing ia64 platforms (and
318 * hopefully it'll stay that way).
319 */
320static inline unsigned char
321___ia64_readb (const volatile void __iomem *addr)
322{
323 return *(volatile unsigned char __force *)addr;
324}
325
326static inline unsigned short
327___ia64_readw (const volatile void __iomem *addr)
328{
329 return *(volatile unsigned short __force *)addr;
330}
331
332static inline unsigned int
333___ia64_readl (const volatile void __iomem *addr)
334{
335 return *(volatile unsigned int __force *) addr;
336}
337
338static inline unsigned long
339___ia64_readq (const volatile void __iomem *addr)
340{
341 return *(volatile unsigned long __force *) addr;
342}
343
344static inline void
345__writeb (unsigned char val, volatile void __iomem *addr)
346{
347 *(volatile unsigned char __force *) addr = val;
348}
349
350static inline void
351__writew (unsigned short val, volatile void __iomem *addr)
352{
353 *(volatile unsigned short __force *) addr = val;
354}
355
356static inline void
357__writel (unsigned int val, volatile void __iomem *addr)
358{
359 *(volatile unsigned int __force *) addr = val;
360}
361
362static inline void
363__writeq (unsigned long val, volatile void __iomem *addr)
364{
365 *(volatile unsigned long __force *) addr = val;
366}
367
368#define __readb platform_readb
369#define __readw platform_readw
370#define __readl platform_readl
371#define __readq platform_readq
372#define __readb_relaxed platform_readb_relaxed
373#define __readw_relaxed platform_readw_relaxed
374#define __readl_relaxed platform_readl_relaxed
375#define __readq_relaxed platform_readq_relaxed
376
377#define readb(a) __readb((a))
378#define readw(a) __readw((a))
379#define readl(a) __readl((a))
380#define readq(a) __readq((a))
381#define readb_relaxed(a) __readb_relaxed((a))
382#define readw_relaxed(a) __readw_relaxed((a))
383#define readl_relaxed(a) __readl_relaxed((a))
384#define readq_relaxed(a) __readq_relaxed((a))
385#define __raw_readb readb
386#define __raw_readw readw
387#define __raw_readl readl
388#define __raw_readq readq
389#define __raw_readb_relaxed readb_relaxed
390#define __raw_readw_relaxed readw_relaxed
391#define __raw_readl_relaxed readl_relaxed
392#define __raw_readq_relaxed readq_relaxed
393#define writeb(v,a) __writeb((v), (a))
394#define writew(v,a) __writew((v), (a))
395#define writel(v,a) __writel((v), (a))
396#define writeq(v,a) __writeq((v), (a))
397#define __raw_writeb writeb
398#define __raw_writew writew
399#define __raw_writel writel
400#define __raw_writeq writeq
401
402#ifndef inb_p
403# define inb_p inb
404#endif
405#ifndef inw_p
406# define inw_p inw
407#endif
408#ifndef inl_p
409# define inl_p inl
410#endif
411
412#ifndef outb_p
413# define outb_p outb
414#endif
415#ifndef outw_p
416# define outw_p outw
417#endif
418#ifndef outl_p
419# define outl_p outl
420#endif
421
Aron Griffisffc45572006-10-17 00:28:15 -0400422# ifdef __KERNEL__
423
Bjorn Helgaase9b0a072006-03-26 01:37:06 -0800424extern void __iomem * ioremap(unsigned long offset, unsigned long size);
425extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
Bjorn Helgaas9b50ffb2007-03-30 10:34:05 -0600426extern void iounmap (volatile void __iomem *addr);
Luck, Tonycd7bcf32009-12-14 20:00:36 +0000427extern void __iomem * early_ioremap (unsigned long phys_addr, unsigned long size);
428extern void early_iounmap (volatile void __iomem *addr, unsigned long size);
Len Brown6d5bbf02011-01-07 01:46:40 +0100429static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
430{
431 return ioremap(phys_addr, size);
432}
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435/*
436 * String version of IO memory access ops:
437 */
438extern void memcpy_fromio(void *dst, const volatile void __iomem *src, long n);
439extern void memcpy_toio(volatile void __iomem *dst, const void *src, long n);
440extern void memset_io(volatile void __iomem *s, int c, long n);
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442# endif /* __KERNEL__ */
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444#endif /* _ASM_IA64_IO_H */