aboutsummaryrefslogtreecommitdiffstats
path: root/hwaccess.h
blob: af7054b04dd62a650e015ab05a9f163019f8a457 (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
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2009 Carl-Daniel Hailfinger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

/*
 * Header file for hardware access and OS abstraction. Included from flash.h.
 */

#ifndef __HWACCESS_H__
#define __HWACCESS_H__ 1

#include "platform.h"

#if NEED_PCI == 1
/*
 * libpci headers use the variable name "index" which triggers shadowing
 * warnings on systems which have the index() function in a default #include
 * or as builtin.
 */
#define index shadow_workaround_index

#if !defined (__NetBSD__)
#include <pci/pci.h>
#else
#include <pciutils/pci.h>
#endif

#undef index
#endif /* NEED_PCI == 1 */

#define ___constant_swab8(x) ((uint8_t) (				\
	(((uint8_t)(x) & (uint8_t)0xffU))))

#define ___constant_swab16(x) ((uint16_t) (				\
	(((uint16_t)(x) & (uint16_t)0x00ffU) << 8) |			\
	(((uint16_t)(x) & (uint16_t)0xff00U) >> 8)))

#define ___constant_swab32(x) ((uint32_t) (				\
	(((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |		\
	(((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |		\
	(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) |		\
	(((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))

#define ___constant_swab64(x) ((uint64_t) (				\
	(((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) |	\
	(((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) |	\
	(((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) |	\
	(((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) <<  8) |	\
	(((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >>  8) |	\
	(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) |	\
	(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) |	\
	(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))

#if defined (__FLASHROM_BIG_ENDIAN__)

#define cpu_to_le(bits)							\
static inline uint##bits##_t cpu_to_le##bits(uint##bits##_t val)	\
{									\
	return ___constant_swab##bits(val);				\
}

cpu_to_le(8)
cpu_to_le(16)
cpu_to_le(32)
cpu_to_le(64)

#define cpu_to_be8
#define cpu_to_be16
#define cpu_to_be32
#define cpu_to_be64

#elif defined (__FLASHROM_LITTLE_ENDIAN__)

#define cpu_to_be(bits)							\
static inline uint##bits##_t cpu_to_be##bits(uint##bits##_t val)	\
{									\
	return ___constant_swab##bits(val);				\
}

cpu_to_be(8)
cpu_to_be(16)
cpu_to_be(32)
cpu_to_be(64)

#define cpu_to_le8
#define cpu_to_le16
#define cpu_to_le32
#define cpu_to_le64

#endif /* __FLASHROM_BIG_ENDIAN__ / __FLASHROM_LITTLE_ENDIAN__ */

#define be_to_cpu8 cpu_to_be8
#define be_to_cpu16 cpu_to_be16
#define be_to_cpu32 cpu_to_be32
#define be_to_cpu64 cpu_to_be64
#define le_to_cpu8 cpu_to_le8
#define le_to_cpu16 cpu_to_le16
#define le_to_cpu32 cpu_to_le32
#define le_to_cpu64 cpu_to_le64

#if NEED_RAW_ACCESS == 1
#if IS_X86

/* sys/io.h provides iopl(2) and x86 I/O port access functions (inb, outb etc).
 * It is included in glibc (thus available also on debian/kFreeBSD) but also in other libcs that mimic glibc,
 * e.g. musl and uclibc. Because we cannot detect the libc or existence of the header or of the instructions
 * themselves safely in here we use some heuristic below:
 * On Android we don't have the header file and no way for I/O port access at all. However, sys/glibc-syscalls.h
 * refers to an iopl implementation and we therefore include at least that one for now. On non-Android we assume
 * that a Linux system's libc has a suitable sys/io.h or (on non-Linux) we depend on glibc to offer it. */
#if defined(__ANDROID__)
#include <sys/glibc-syscalls.h>
#elif defined(__linux__) || defined(__GLIBC__)
#include <sys/io.h>
#endif

#define __FLASHROM_HAVE_OUTB__ 1

/* for iopl and outb under Solaris */
#if defined (__sun)
#include <sys/sysi86.h>
#include <sys/psw.h>
#include <asm/sunddi.h>
#endif

/* Clarification about OUTB/OUTW/OUTL argument order:
 * OUT[BWL](val, port)
 */

#if defined(__FreeBSD__) || defined(__DragonFly__)
  /* Note that Debian/kFreeBSD (FreeBSD kernel with glibc) has conflicting
   * out[bwl] definitions in machine/cpufunc.h and sys/io.h at least in some
   * versions. Use machine/cpufunc.h only for plain FreeBSD/DragonFlyBSD.
   */
  #include <sys/types.h>
  #include <machine/cpufunc.h>
  #define OUTB(x, y) do { u_int outb_tmp = (y); outb(outb_tmp, (x)); } while (0)
  #define OUTW(x, y) do { u_int outw_tmp = (y); outw(outw_tmp, (x)); } while (0)
  #define OUTL(x, y) do { u_int outl_tmp = (y); outl(outl_tmp, (x)); } while (0)
  #define INB(x) __extension__ ({ u_int inb_tmp = (x); inb(inb_tmp); })
  #define INW(x) __extension__ ({ u_int inw_tmp = (x); inw(inw_tmp); })
  #define INL(x) __extension__ ({ u_int inl_tmp = (x); inl(inl_tmp); })
#else

#if defined (__sun)
  /* Note different order for outb */
  #define OUTB(x,y) outb(y, x)
  #define OUTW(x,y) outw(y, x)
  #define OUTL(x,y) outl(y, x)
  #define INB  inb
  #define INW  inw
  #define INL  inl
#else

#ifdef __DJGPP__

#include <pc.h>

  #define OUTB(x,y) outportb(y, x)
  #define OUTW(x,y) outportw(y, x)
  #define OUTL(x,y) outportl(y, x)

  #define INB  inportb
  #define INW  inportw
  #define INL  inportl

#else

#if defined(__MACH__) && defined(__APPLE__)
    /* Header is part of the DirectHW library. */
    #include <DirectHW/DirectHW.h>
#endif

  /* This is the usual glibc interface. */
  #define OUTB outb
  #define OUTW outw
  #define OUTL outl
  #define INB  inb
  #define INW  inw
  #define INL  inl
#endif
#endif
#endif

#if defined(__NetBSD__) || defined (__OpenBSD__)
  #if defined(__i386__) || defined(__x86_64__)
    #include <sys/types.h>
    #include <machine/sysarch.h>
    #if defined(__NetBSD__)
      #if defined(__i386__)
        #define iopl i386_iopl
      #elif defined(__x86_64__)
        #define iopl x86_64_iopl
      #endif
    #elif defined (__OpenBSD__)
      #if defined(__i386__)
        #define iopl i386_iopl
      #elif defined(__amd64__)
        #define iopl amd64_iopl
      #endif
    #endif

static inline void outb(uint8_t value, uint16_t port)
{
	__asm__ volatile ("outb %b0,%w1": :"a" (value), "Nd" (port));
}

static inline uint8_t inb(uint16_t port)
{
	uint8_t value;
	__asm__ volatile ("inb %w1,%0":"=a" (value):"Nd" (port));
	return value;
}

static inline void outw(uint16_t value, uint16_t port)
{
	__asm__ volatile ("outw %w0,%w1": :"a" (value), "Nd" (port));
}

static inline uint16_t inw(uint16_t port)
{
	uint16_t value;
	__asm__ volatile ("inw %w1,%0":"=a" (value):"Nd" (port));
	return value;
}

static inline void outl(uint32_t value, uint16_t port)
{
	__asm__ volatile ("outl %0,%w1": :"a" (value), "Nd" (port));
}

static inline uint32_t inl(uint16_t port)
{
	uint32_t value;
	__asm__ volatile ("inl %1,%0":"=a" (value):"Nd" (port));
	return value;
}
  #endif
#endif

#if !(defined(__MACH__) && defined(__APPLE__)) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && !defined(__DragonFly__) && !defined(__LIBPAYLOAD__)
typedef struct { uint32_t hi, lo; } msr_t;
msr_t rdmsr(int addr);
int wrmsr(int addr, msr_t msr);
#endif
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
/* FreeBSD already has conflicting definitions for wrmsr/rdmsr. */
#undef rdmsr
#undef wrmsr
#define rdmsr freebsd_rdmsr
#define wrmsr freebsd_wrmsr
typedef struct { uint32_t hi, lo; } msr_t;
msr_t freebsd_rdmsr(int addr);
int freebsd_wrmsr(int addr, msr_t msr);
#endif
#if defined(__LIBPAYLOAD__)
#include <arch/io.h>
#include <arch/msr.h>
typedef struct { uint32_t hi, lo; } msr_t;
msr_t libpayload_rdmsr(int addr);
int libpayload_wrmsr(int addr, msr_t msr);
#undef rdmsr
#define rdmsr libpayload_rdmsr
#define wrmsr libpayload_wrmsr
#endif

#elif IS_PPC

/* PCI port I/O is not yet implemented on PowerPC. */

#elif IS_MIPS

/* PCI port I/O is not yet implemented on MIPS. */

#elif IS_SPARC

/* PCI port I/O is not yet implemented on SPARC. */

#elif IS_ARM

/* Non memory mapped I/O is not supported on ARM. */

#else

#error Unknown architecture, please check if it supports PCI port IO.

#endif /* IS_* */
#endif /* NEED_RAW_ACCESS == 1 */

#endif /* !__HWACCESS_H__ */