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
|
#ifndef _ASM_IO_H
#define _ASM_IO_H
#include <linux/types.h>
#include <asm/pgtable.h>
#define virt_to_phys(a) ((unsigned long)__pa(a))
#define phys_to_virt(a) __va(a)
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
static inline unsigned long isa_bus_to_virt(unsigned long addr) {
BUG();
return 0;
}
static inline unsigned long isa_virt_to_bus(void *addr) {
BUG();
return 0;
}
/*
* Memory mapped I/O
*
* readX()/writeX() do byteswapping and take an ioremapped address
* __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
* gsc_*() don't byteswap and operate on physical addresses;
* eg dev->hpa or 0xfee00000.
*/
static inline unsigned char gsc_readb(unsigned long addr)
{
long flags;
unsigned char ret;
__asm__ __volatile__(
" rsm 2,%0\n"
" ldbx 0(%2),%1\n"
" mtsm %0\n"
: "=&r" (flags), "=r" (ret) : "r" (addr) );
return ret;
}
static inline unsigned short gsc_readw(unsigned long addr)
{
long flags;
unsigned short ret;
__asm__ __volatile__(
" rsm 2,%0\n"
" ldhx 0(%2),%1\n"
" mtsm %0\n"
: "=&r" (flags), "=r" (ret) : "r" (addr) );
return ret;
}
static inline unsigned int gsc_readl(unsigned long addr)
{
u32 ret;
__asm__ __volatile__(
" ldwax 0(%1),%0\n"
: "=r" (ret) : "r" (addr) );
return ret;
}
static inline unsigned long long gsc_readq(unsigned long addr)
{
unsigned long long ret;
#ifdef CONFIG_64BIT
__asm__ __volatile__(
" ldda 0(%1),%0\n"
: "=r" (ret) : "r" (addr) );
#else
/* two reads may have side effects.. */
ret = ((u64) gsc_readl(addr)) << 32;
ret |= gsc_readl(addr+4);
#endif
return ret;
}
static inline void gsc_writeb(unsigned char val, unsigned long addr)
{
long flags;
__asm__ __volatile__(
" rsm 2,%0\n"
" stbs %1,0(%2)\n"
" mtsm %0\n"
: "=&r" (flags) : "r" (val), "r" (addr) );
}
static inline void gsc_writew(unsigned short val, unsigned long addr)
{
long flags;
__asm__ __volatile__(
" rsm 2,%0\n"
" sths %1,0(%2)\n"
" mtsm %0\n"
: "=&r" (flags) : "r" (val), "r" (addr) );
}
static inline void gsc_writel(unsigned int val, unsigned long addr)
{
__asm__ __volatile__(
" stwas %0,0(%1)\n"
: : "r" (val), "r" (addr) );
}
static inline void gsc_writeq(unsigned long long val, unsigned long addr)
{
#ifdef CONFIG_64BIT
__asm__ __volatile__(
" stda %0,0(%1)\n"
: : "r" (val), "r" (addr) );
#else
/* two writes may have side effects.. */
gsc_writel(val >> 32, addr);
gsc_writel(val, addr+4);
#endif
}
/*
* The standard PCI ioremap interfaces
*/
extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
/* Most machines react poorly to I/O-space being cacheable... Instead let's
* define ioremap() in terms of ioremap_nocache().
*/
static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
{
return __ioremap(offset, size, _PAGE_NO_CACHE);
}
#define ioremap_nocache(off, sz) ioremap((off), (sz))
extern void iounmap(const volatile void __iomem *addr);
static inline unsigned char __raw_readb(const volatile void __iomem *addr)
{
return (*(volatile unsigned char __force *) (addr));
}
static inline unsigned short __raw_readw(const volatile void __iomem *addr)
{
return *(volatile unsigned short __force *) addr;
}
static inline unsigned int __raw_readl(const volatile void __iomem *addr)
{
return *(volatile unsigned int __force *) addr;
}
static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
{
return *(volatile unsigned long long __force *) addr;
}
static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
{
*(volatile unsigned char __force *) addr = b;
}
static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
{
*(volatile unsigned short __force *) addr = b;
}
static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
{
*(volatile unsigned int __force *) addr = b;
}
static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
{
*(volatile unsigned long long __force *) addr = b;
}
/* readb can never be const, so use __fswab instead of le*_to_cpu */
#define readb(addr) __raw_readb(addr)
#define readw(addr) __fswab16(__raw_readw(addr))
#define readl(addr) __fswab32(__raw_readl(addr))
#define readq(addr) __fswab64(__raw_readq(addr))
#define writeb(b, addr) __raw_writeb(b, addr)
#define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
#define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
#define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
#define readb_relaxed(addr) readb(addr)
#define readw_relaxed(addr) readw(addr)
#define readl_relaxed(addr) readl(addr)
#define readq_relaxed(addr) readq(addr)
#define mmiowb() do { } while (0)
void memset_io(volatile void __iomem *addr, unsigned char val, int count);
void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
/* Port-space IO */
#define inb_p inb
#define inw_p inw
#define inl_p inl
#define outb_p outb
#define outw_p outw
#define outl_p outl
extern unsigned char eisa_in8(unsigned short port);
extern unsigned short eisa_in16(unsigned short port);
extern unsigned int eisa_in32(unsigned short port);
extern void eisa_out8(unsigned char data, unsigned short port);
extern void eisa_out16(unsigned short data, unsigned short port);
extern void eisa_out32(unsigned int data, unsigned short port);
#if defined(CONFIG_PCI)
extern unsigned char inb(int addr);
extern unsigned short inw(int addr);
extern unsigned int inl(int addr);
extern void outb(unsigned char b, int addr);
extern void outw(unsigned short b, int addr);
extern void outl(unsigned int b, int addr);
#elif defined(CONFIG_EISA)
#define inb eisa_in8
#define inw eisa_in16
#define inl eisa_in32
#define outb eisa_out8
#define outw eisa_out16
#define outl eisa_out32
#else
static inline char inb(unsigned long addr)
{
BUG();
return -1;
}
static inline short inw(unsigned long addr)
{
BUG();
return -1;
}
static inline int inl(unsigned long addr)
{
BUG();
return -1;
}
#define outb(x, y) BUG()
#define outw(x, y) BUG()
#define outl(x, y) BUG()
#endif
/*
* String versions of in/out ops:
*/
extern void insb (unsigned long port, void *dst, unsigned long count);
extern void insw (unsigned long port, void *dst, unsigned long count);
extern void insl (unsigned long port, void *dst, unsigned long count);
extern void outsb (unsigned long port, const void *src, unsigned long count);
extern void outsw (unsigned long port, const void *src, unsigned long count);
extern void outsl (unsigned long port, const void *src, unsigned long count);
/* IO Port space is : BBiiii where BB is HBA number. */
#define IO_SPACE_LIMIT 0x00ffffff
/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
* bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
* mode (essentially just sign extending. This macro takes in a 32
* bit I/O address (still with the leading f) and outputs the correct
* value for either 32 or 64 bit mode */
#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
#include <asm-generic/iomap.h>
/*
* 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
|
