summaryrefslogtreecommitdiffstats
path: root/arch/ia64/include/asm/io.h
blob: 3d666a11a2def370dc8f7e57bab9b9da6c78dcb8 (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
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IA64_IO_H
#define _ASM_IA64_IO_H

/*
 * This file contains the definitions for the emulated IO instructions
 * inb/inw/inl/outb/outw/outl and the "string versions" of the same
 * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
 * versions of the single-IO instructions (inb_p/inw_p/..).
 *
 * This file is not meant to be obfuscating: it's just complicated to
 * (a) handle it all in a way that makes gcc able to optimize it as
 * well as possible and (b) trying to avoid writing the same thing
 * over and over again with slight variations and possibly making a
 * mistake somewhere.
 *
 * Copyright (C) 1998-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
 */

#include <asm/unaligned.h>
#include <asm/early_ioremap.h>

/* We don't use IO slowdowns on the ia64, but.. */
#define __SLOW_DOWN_IO	do { } while (0)
#define SLOW_DOWN_IO	do { } while (0)

#define __IA64_UNCACHED_OFFSET	RGN_BASE(RGN_UNCACHED)

/*
 * The legacy I/O space defined by the ia64 architecture supports only 65536 ports, but
 * large machines may have multiple other I/O spaces so we can't place any a priori limit
 * on IO_SPACE_LIMIT.  These additional spaces are described in ACPI.
 */
#define IO_SPACE_LIMIT		0xffffffffffffffffUL

#define MAX_IO_SPACES_BITS		8
#define MAX_IO_SPACES			(1UL << MAX_IO_SPACES_BITS)
#define IO_SPACE_BITS			24
#define IO_SPACE_SIZE			(1UL << IO_SPACE_BITS)

#define IO_SPACE_NR(port)		((port) >> IO_SPACE_BITS)
#define IO_SPACE_BASE(space)		((space) << IO_SPACE_BITS)
#define IO_SPACE_PORT(port)		((port) & (IO_SPACE_SIZE - 1))

#define IO_SPACE_SPARSE_ENCODING(p)	((((p) >> 2) << 12) | ((p) & 0xfff))

struct io_space {
	unsigned long mmio_base;	/* base in MMIO space */
	int sparse;
};

extern struct io_space io_space[];
extern unsigned int num_io_spaces;

# ifdef __KERNEL__

/*
 * All MMIO iomem cookies are in region 6; anything less is a PIO cookie:
 *	0xCxxxxxxxxxxxxxxx	MMIO cookie (return from ioremap)
 *	0x000000001SPPPPPP	PIO cookie (S=space number, P..P=port)
 *
 * ioread/writeX() uses the leading 1 in PIO cookies (PIO_OFFSET) to catch
 * code that uses bare port numbers without the prerequisite pci_iomap().
 */
#define PIO_OFFSET		(1UL << (MAX_IO_SPACES_BITS + IO_SPACE_BITS))
#define PIO_MASK		(PIO_OFFSET - 1)
#define PIO_RESERVED		__IA64_UNCACHED_OFFSET
#define HAVE_ARCH_PIO_SIZE

#include <asm/intrinsics.h>
#include <asm/page.h>
#include <asm-generic/iomap.h>

/*
 * Change virtual addresses to physical addresses and vv.
 */
static inline unsigned long
virt_to_phys (volatile void *address)
{
	return (unsigned long) address - PAGE_OFFSET;
}
#define virt_to_phys virt_to_phys

static inline void*
phys_to_virt (unsigned long address)
{
	return (void *) (address + PAGE_OFFSET);
}
#define phys_to_virt phys_to_virt

#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
extern u64 kern_mem_attribute (unsigned long phys_addr, unsigned long size);
extern int valid_phys_addr_range (phys_addr_t addr, size_t count); /* efi.c */
extern int valid_mmap_phys_addr_range (unsigned long pfn, size_t count);

/*
 * The following two macros are deprecated and scheduled for removal.
 * Please use the PCI-DMA interface defined in <asm/pci.h> instead.
 */
#define bus_to_virt	phys_to_virt
#define virt_to_bus	virt_to_phys
#define page_to_bus	page_to_phys

# endif /* KERNEL */

/*
 * Memory fence w/accept.  This should never be used in code that is
 * not IA-64 specific.
 */
#define __ia64_mf_a()	ia64_mfa()

static inline void*
__ia64_mk_io_addr (unsigned long port)
{
	struct io_space *space;
	unsigned long offset;

	space = &io_space[IO_SPACE_NR(port)];
	port = IO_SPACE_PORT(port);
	if (space->sparse)
		offset = IO_SPACE_SPARSE_ENCODING(port);
	else
		offset = port;

	return (void *) (space->mmio_base | offset);
}

/*
 * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access to ensure
 * that the access has completed before executing other I/O accesses.  Since we're doing
 * the accesses through an uncachable (UC) translation, the CPU will execute them in
 * program order.  However, we still need to tell the compiler not to shuffle them around
 * during optimization, which is why we use "volatile" pointers.
 */

#define inb inb
static inline unsigned int inb(unsigned long port)
{
	volatile unsigned char *addr = __ia64_mk_io_addr(port);
	unsigned char ret;

	ret = *addr;
	__ia64_mf_a();
	return ret;
}

#define inw inw
static inline unsigned int inw(unsigned long port)
{
	volatile unsigned short *addr = __ia64_mk_io_addr(port);
	unsigned short ret;

	ret = *addr;
	__ia64_mf_a();
	return ret;
}

#define inl inl
static inline unsigned int inl(unsigned long port)
{
	volatile unsigned int *addr = __ia64_mk_io_addr(port);
	unsigned int ret;

	ret = *addr;
	__ia64_mf_a();
	return ret;
}

#define outb outb
static inline void outb(unsigned char val, unsigned long port)
{
	volatile unsigned char *addr = __ia64_mk_io_addr(port);

	*addr = val;
	__ia64_mf_a();
}

#define outw outw
static inline void outw(unsigned short val, unsigned long port)
{
	volatile unsigned short *addr = __ia64_mk_io_addr(port);

	*addr = val;
	__ia64_mf_a();
}

#define outl outl
static inline void outl(unsigned int val, unsigned long port)
{
	volatile unsigned int *addr = __ia64_mk_io_addr(port);

	*addr = val;
	__ia64_mf_a();
}

#define insb insb
static inline void insb(unsigned long port, void *dst, unsigned long count)
{
	unsigned char *dp = dst;

	while (count--)
		*dp++ = inb(port);
}

#define insw insw
static inline void insw(unsigned long port, void *dst, unsigned long count)
{
	unsigned short *dp = dst;

	while (count--)
		put_unaligned(inw(port), dp++);
}

#define insl insl
static inline void insl(unsigned long port, void *dst, unsigned long count)
{
	unsigned int *dp = dst;

	while (count--)
		put_unaligned(inl(port), dp++);
}

#define outsb outsb
static inline void outsb(unsigned long port, const void *src,
		unsigned long count)
{
	const unsigned char *sp = src;

	while (count--)
		outb(*sp++, port);
}

#define outsw outsw
static inline void outsw(unsigned long port, const void *src,
		unsigned long count)
{
	const unsigned short *sp = src;

	while (count--)
		outw(get_unaligned(sp++), port);
}

#define outsl outsl
static inline void outsl(unsigned long port, const void *src,
		unsigned long count)
{
	const unsigned int *sp = src;

	while (count--)
		outl(get_unaligned(sp++), port);
}

# ifdef __KERNEL__

extern void __iomem * ioremap(unsigned long offset, unsigned long size);
extern void __iomem * ioremap_uc(unsigned long offset, unsigned long size);
extern void iounmap (volatile void __iomem *addr);
static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
{
	return ioremap(phys_addr, size);
}
#define ioremap ioremap
#define ioremap_cache ioremap_cache
#define ioremap_uc ioremap_uc
#define iounmap iounmap

/*
 * String version of IO memory access ops:
 */
extern void memcpy_fromio(void *dst, const volatile void __iomem *src, long n);
extern void memcpy_toio(volatile void __iomem *dst, const void *src, long n);
extern void memset_io(volatile void __iomem *s, int c, long n);

#define memcpy_fromio memcpy_fromio
#define memcpy_toio memcpy_toio
#define memset_io memset_io
#define xlate_dev_kmem_ptr xlate_dev_kmem_ptr
#define xlate_dev_mem_ptr xlate_dev_mem_ptr
#include <asm-generic/io.h>
#undef PCI_IOBASE

# endif /* __KERNEL__ */

#endif /* _ASM_IA64_IO_H */