summaryrefslogtreecommitdiff
path: root/include/asm-ppc/io.h
blob: f7f614dfc648170760cc31da3284b20ffcc717b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
#ifdef __KERNEL__
#ifndef _PPC_IO_H
#define _PPC_IO_H

#include <linux/config.h>
#include <linux/string.h>
#include <linux/types.h>

#include <asm/page.h>
#include <asm/byteorder.h>
#include <asm/synch.h>
#include <asm/mmu.h>

#define SIO_CONFIG_RA	0x398
#define SIO_CONFIG_RD	0x399

#define SLOW_DOWN_IO

#define PMAC_ISA_MEM_BASE 	0
#define PMAC_PCI_DRAM_OFFSET 	0
#define CHRP_ISA_IO_BASE 	0xf8000000
#define CHRP_ISA_MEM_BASE 	0xf7000000
#define CHRP_PCI_DRAM_OFFSET 	0
#define PREP_ISA_IO_BASE 	0x80000000
#define PREP_ISA_MEM_BASE 	0xc0000000
#define PREP_PCI_DRAM_OFFSET 	0x80000000

#if defined(CONFIG_4xx)
#include <asm/ibm4xx.h>
#elif defined(CONFIG_8xx)
#include <asm/mpc8xx.h>
#elif defined(CONFIG_8260)
#include <asm/mpc8260.h>
#elif defined(CONFIG_83xx)
#include <asm/mpc83xx.h>
#elif defined(CONFIG_85xx)
#include <asm/mpc85xx.h>
#elif defined(CONFIG_APUS)
#define _IO_BASE	0
#define _ISA_MEM_BASE	0
#define PCI_DRAM_OFFSET 0
#else /* Everyone else */
#define _IO_BASE	isa_io_base
#define _ISA_MEM_BASE	isa_mem_base
#define PCI_DRAM_OFFSET	pci_dram_offset
#endif /* Platform-dependent I/O */

#define ___IO_BASE ((void __iomem *)_IO_BASE)
extern unsigned long isa_io_base;
extern unsigned long isa_mem_base;
extern unsigned long pci_dram_offset;

/*
 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 *
 * Read operations have additional twi & isync to make sure the read
 * is actually performed (i.e. the data has come back) before we start
 * executing any following instructions.
 */
extern inline int in_8(const volatile unsigned char __iomem *addr)
{
	int ret;

	__asm__ __volatile__(
		"lbz%U1%X1 %0,%1;\n"
		"twi 0,%0,0;\n"
		"isync" : "=r" (ret) : "m" (*addr));
	return ret;
}

extern inline void out_8(volatile unsigned char __iomem *addr, int val)
{
	__asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
}

extern inline int in_le16(const volatile unsigned short __iomem *addr)
{
	int ret;

	__asm__ __volatile__("lhbrx %0,0,%1;\n"
			     "twi 0,%0,0;\n"
			     "isync" : "=r" (ret) :
			      "r" (addr), "m" (*addr));
	return ret;
}

extern inline int in_be16(const volatile unsigned short __iomem *addr)
{
	int ret;

	__asm__ __volatile__("lhz%U1%X1 %0,%1;\n"
			     "twi 0,%0,0;\n"
			     "isync" : "=r" (ret) : "m" (*addr));
	return ret;
}

extern inline void out_le16(volatile unsigned short __iomem *addr, int val)
{
	__asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) :
			      "r" (val), "r" (addr));
}

extern inline void out_be16(volatile unsigned short __iomem *addr, int val)
{
	__asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
}

extern inline unsigned in_le32(const volatile unsigned __iomem *addr)
{
	unsigned ret;

	__asm__ __volatile__("lwbrx %0,0,%1;\n"
			     "twi 0,%0,0;\n"
			     "isync" : "=r" (ret) :
			     "r" (addr), "m" (*addr));
	return ret;
}

extern inline unsigned in_be32(const volatile unsigned __iomem *addr)
{
	unsigned ret;

	__asm__ __volatile__("lwz%U1%X1 %0,%1;\n"
			     "twi 0,%0,0;\n"
			     "isync" : "=r" (ret) : "m" (*addr));
	return ret;
}

extern inline void out_le32(volatile unsigned __iomem *addr, int val)
{
	__asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) :
			     "r" (val), "r" (addr));
}

extern inline void out_be32(volatile unsigned __iomem *addr, int val)
{
	__asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
}
#if defined (CONFIG_8260_PCI9)
#define readb(addr) in_8((volatile u8 *)(addr))
#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
#else
static inline __u8 readb(const volatile void __iomem *addr)
{
	return in_8(addr);
}
static inline void writeb(__u8 b, volatile void __iomem *addr)
{
	out_8(addr, b);
}
#endif

#if defined(CONFIG_APUS)
static inline __u16 readw(const volatile void __iomem *addr)
{
	return *(__force volatile __u16 *)(addr);
}
static inline __u32 readl(const volatile void __iomem *addr)
{
	return *(__force volatile __u32 *)(addr);
}
static inline void writew(__u16 b, volatile void __iomem *addr)
{
	*(__force volatile __u16 *)(addr) = b;
}
static inline void writel(__u32 b, volatile void __iomem *addr)
{
	*(__force volatile __u32 *)(addr) = b;
}
#elif defined (CONFIG_8260_PCI9)
/* Use macros if PCI9 workaround enabled */
#define readw(addr) in_le16((volatile u16 *)(addr))
#define readl(addr) in_le32((volatile u32 *)(addr))
#define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
#define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
#else
static inline __u16 readw(const volatile void __iomem *addr)
{
	return in_le16(addr);
}
static inline __u32 readl(const volatile void __iomem *addr)
{
	return in_le32(addr);
}
static inline void writew(__u16 b, volatile void __iomem *addr)
{
	out_le16(addr, b);
}
static inline void writel(__u32 b, volatile void __iomem *addr)
{
	out_le32(addr, b);
}
#endif /* CONFIG_APUS */

#define readb_relaxed(addr) readb(addr)
#define readw_relaxed(addr) readw(addr)
#define readl_relaxed(addr) readl(addr)

static inline __u8 __raw_readb(const volatile void __iomem *addr)
{
	return *(__force volatile __u8 *)(addr);
}
static inline __u16 __raw_readw(const volatile void __iomem *addr)
{
	return *(__force volatile __u16 *)(addr);
}
static inline __u32 __raw_readl(const volatile void __iomem *addr)
{
	return *(__force volatile __u32 *)(addr);
}
static inline void __raw_writeb(__u8 b, volatile void __iomem *addr)
{
	*(__force volatile __u8 *)(addr) = b;
}
static inline void __raw_writew(__u16 b, volatile void __iomem *addr)
{
	*(__force volatile __u16 *)(addr) = b;
}
static inline void __raw_writel(__u32 b, volatile void __iomem *addr)
{
	*(__force volatile __u32 *)(addr) = b;
}

#define mmiowb()

/*
 * The insw/outsw/insl/outsl macros don't do byte-swapping.
 * They are only used in practice for transferring buffers which
 * are arrays of bytes, and byte-swapping is not appropriate in
 * that case.  - paulus
 */
#define insb(port, buf, ns)	_insb((port)+___IO_BASE, (buf), (ns))
#define outsb(port, buf, ns)	_outsb((port)+___IO_BASE, (buf), (ns))
#define insw(port, buf, ns)	_insw_ns((port)+___IO_BASE, (buf), (ns))
#define outsw(port, buf, ns)	_outsw_ns((port)+___IO_BASE, (buf), (ns))
#define insl(port, buf, nl)	_insl_ns((port)+___IO_BASE, (buf), (nl))
#define outsl(port, buf, nl)	_outsl_ns((port)+___IO_BASE, (buf), (nl))

/*
 * On powermacs, we will get a machine check exception if we
 * try to read data from a non-existent I/O port.  Because the
 * machine check is an asynchronous exception, it isn't
 * well-defined which instruction SRR0 will point to when the
 * exception occurs.
 * With the sequence below (twi; isync; nop), we have found that
 * the machine check occurs on one of the three instructions on
 * all PPC implementations tested so far.  The twi and isync are
 * needed on the 601 (in fact twi; sync works too), the isync and
 * nop are needed on 604[e|r], and any of twi, sync or isync will
 * work on 603[e], 750, 74xx.
 * The twi creates an explicit data dependency on the returned
 * value which seems to be needed to make the 601 wait for the
 * load to finish.
 */

#define __do_in_asm(name, op)				\
extern __inline__ unsigned int name(unsigned int port)	\
{							\
	unsigned int x;					\
	__asm__ __volatile__(				\
			op "	%0,0,%1\n"		\
		"1:	twi	0,%0,0\n"		\
		"2:	isync\n"			\
		"3:	nop\n"				\
		"4:\n"					\
		".section .fixup,\"ax\"\n"		\
		"5:	li	%0,-1\n"		\
		"	b	4b\n"			\
		".previous\n"				\
		".section __ex_table,\"a\"\n"		\
		"	.align	2\n"			\
		"	.long	1b,5b\n"		\
		"	.long	2b,5b\n"		\
		"	.long	3b,5b\n"		\
		".previous"				\
		: "=&r" (x)				\
		: "r" (port + ___IO_BASE));		\
	return x;					\
}

#define __do_out_asm(name, op)				\
extern __inline__ void name(unsigned int val, unsigned int port) \
{							\
	__asm__ __volatile__(				\
		op " %0,0,%1\n"				\
		"1:	sync\n"				\
		"2:\n"					\
		".section __ex_table,\"a\"\n"		\
		"	.align	2\n"			\
		"	.long	1b,2b\n"		\
		".previous"				\
		: : "r" (val), "r" (port + ___IO_BASE));	\
}

__do_out_asm(outb, "stbx")
#ifdef CONFIG_APUS
__do_in_asm(inb, "lbzx")
__do_in_asm(inw, "lhz%U1%X1")
__do_in_asm(inl, "lwz%U1%X1")
__do_out_asm(outl,"stw%U0%X0")
__do_out_asm(outw, "sth%U0%X0")
#elif defined (CONFIG_8260_PCI9)
/* in asm cannot be defined if PCI9 workaround is used */
#define inb(port)		in_8((port)+___IO_BASE)
#define inw(port)		in_le16((port)+___IO_BASE)
#define inl(port)		in_le32((port)+___IO_BASE)
__do_out_asm(outw, "sthbrx")
__do_out_asm(outl, "stwbrx")
#else
__do_in_asm(inb, "lbzx")
__do_in_asm(inw, "lhbrx")
__do_in_asm(inl, "lwbrx")
__do_out_asm(outw, "sthbrx")
__do_out_asm(outl, "stwbrx")

#endif

#define inb_p(port)		inb((port))
#define outb_p(val, port)	outb((val), (port))
#define inw_p(port)		inw((port))
#define outw_p(val, port)	outw((val), (port))
#define inl_p(port)		inl((port))
#define outl_p(val, port)	outl((val), (port))

extern void _insb(volatile u8 __iomem *port, void *buf, int ns);
extern void _outsb(volatile u8 __iomem *port, const void *buf, int ns);
extern void _insw(volatile u16 __iomem *port, void *buf, int ns);
extern void _outsw(volatile u16 __iomem *port, const void *buf, int ns);
extern void _insl(volatile u32 __iomem *port, void *buf, int nl);
extern void _outsl(volatile u32 __iomem *port, const void *buf, int nl);
extern void _insw_ns(volatile u16 __iomem *port, void *buf, int ns);
extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, int ns);
extern void _insl_ns(volatile u32 __iomem *port, void *buf, int nl);
extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, int nl);

/*
 * The *_ns versions below don't do byte-swapping.
 * Neither do the standard versions now, these are just here
 * for older code.
 */
#define insw_ns(port, buf, ns)	_insw_ns((port)+___IO_BASE, (buf), (ns))
#define outsw_ns(port, buf, ns)	_outsw_ns((port)+___IO_BASE, (buf), (ns))
#define insl_ns(port, buf, nl)	_insl_ns((port)+___IO_BASE, (buf), (nl))
#define outsl_ns(port, buf, nl)	_outsl_ns((port)+___IO_BASE, (buf), (nl))


#define IO_SPACE_LIMIT ~0

#if defined (CONFIG_8260_PCI9)
#define memset_io(a,b,c)       memset((void *)(a),(b),(c))
#define memcpy_fromio(a,b,c)   memcpy((a),(void *)(b),(c))
#define memcpy_toio(a,b,c)     memcpy((void *)(a),(b),(c))
#else
static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
{
	memset((void __force *)addr, val, count);
}
static inline void memcpy_fromio(void *dst,const volatile void __iomem *src, int count)
{
	memcpy(dst, (void __force *) src, count);
}
static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
{
	memcpy((void __force *) dst, src, count);
}
#endif

#define eth_io_copy_and_sum(a,b,c,d)		eth_copy_and_sum((a),(void __force *)(void __iomem *)(b),(c),(d))

/*
 * Map in an area of physical address space, for accessing
 * I/O devices etc.
 */
extern void __iomem *__ioremap(phys_addr_t address, unsigned long size,
		       unsigned long flags);
extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
#ifdef CONFIG_44x
extern void __iomem *ioremap64(unsigned long long address, unsigned long size);
#endif
#define ioremap_nocache(addr, size)	ioremap((addr), (size))
extern void iounmap(volatile void __iomem *addr);
extern unsigned long iopa(unsigned long addr);
extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
extern void io_block_mapping(unsigned long virt, phys_addr_t phys,
			     unsigned int size, int flags);

/*
 * The PCI bus is inherently Little-Endian.  The PowerPC is being
 * run Big-Endian.  Thus all values which cross the [PCI] barrier
 * must be endian-adjusted.  Also, the local DRAM has a different
 * address from the PCI point of view, thus buffer addresses also
 * have to be modified [mapped] appropriately.
 */
extern inline unsigned long virt_to_bus(volatile void * address)
{
#ifndef CONFIG_APUS
        if (address == (void *)0)
		return 0;
        return (unsigned long)address - KERNELBASE + PCI_DRAM_OFFSET;
#else
	return iopa ((unsigned long) address);
#endif
}

extern inline void * bus_to_virt(unsigned long address)
{
#ifndef CONFIG_APUS
        if (address == 0)
		return NULL;
        return (void *)(address - PCI_DRAM_OFFSET + KERNELBASE);
#else
	return (void*) mm_ptov (address);
#endif
}

/*
 * Change virtual addresses to physical addresses and vv, for
 * addresses in the area where the kernel has the RAM mapped.
 */
extern inline unsigned long virt_to_phys(volatile void * address)
{
#ifndef CONFIG_APUS
	return (unsigned long) address - KERNELBASE;
#else
	return iopa ((unsigned long) address);
#endif
}

extern inline void * phys_to_virt(unsigned long address)
{
#ifndef CONFIG_APUS
	return (void *) (address + KERNELBASE);
#else
	return (void*) mm_ptov (address);
#endif
}

/*
 * Change "struct page" to physical address.
 */
#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
#define page_to_bus(page)	(page_to_phys(page) + PCI_DRAM_OFFSET)

/* Enforce in-order execution of data I/O.
 * No distinction between read/write on PPC; use eieio for all three.
 */
#define iobarrier_rw() eieio()
#define iobarrier_r()  eieio()
#define iobarrier_w()  eieio()

static inline int check_signature(volatile void __iomem * io_addr,
	const unsigned char *signature, int length)
{
	int retval = 0;
	do {
		if (readb(io_addr) != *signature)
			goto out;
		io_addr++;
		signature++;
		length--;
	} while (length);
	retval = 1;
out:
	return retval;
}

/*
 * Here comes the ppc implementation of the IOMAP 
 * interfaces.
 */
static inline unsigned int ioread8(void __iomem *addr)
{
	return readb(addr);
}

static inline unsigned int ioread16(void __iomem *addr)
{
	return readw(addr);
}

static inline unsigned int ioread32(void __iomem *addr)
{
	return readl(addr);
}

static inline void iowrite8(u8 val, void __iomem *addr)
{
	writeb(val, addr);
}

static inline void iowrite16(u16 val, void __iomem *addr)
{
	writew(val, addr);
}

static inline void iowrite32(u32 val, void __iomem *addr)
{
	writel(val, addr);
}

static inline void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
{
	_insb(addr, dst, count);
}

static inline void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
{
	_insw_ns(addr, dst, count);
}

static inline void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
{
	_insl_ns(addr, dst, count);
}

static inline void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
{
	_outsb(addr, src, count);
}

static inline void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
{
	_outsw_ns(addr, src, count);
}

static inline void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
{
	_outsl_ns(addr, src, count);
}

/* Create a virtual mapping cookie for an IO port range */
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
extern void ioport_unmap(void __iomem *);

/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);

#endif /* _PPC_IO_H */

#ifdef CONFIG_8260_PCI9
#include <asm/mpc8260_pci9.h>
#endif

/*
 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 * access
 */
#define xlate_dev_mem_ptr(p)	__va(p)

/*
 * Convert a virtual cached pointer to an uncached pointer
 */
#define xlate_dev_kmem_ptr(p)	p

#endif /* __KERNEL__ */