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1da177e4 LT |
1 | #ifndef _ASM_IO_H |
2 | #define _ASM_IO_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/types.h> |
5 | #include <asm/pgtable.h> | |
6 | ||
7 | extern unsigned long parisc_vmerge_boundary; | |
8 | extern unsigned long parisc_vmerge_max_size; | |
9 | ||
10 | #define BIO_VMERGE_BOUNDARY parisc_vmerge_boundary | |
11 | #define BIO_VMERGE_MAX_SIZE parisc_vmerge_max_size | |
12 | ||
13 | #define virt_to_phys(a) ((unsigned long)__pa(a)) | |
14 | #define phys_to_virt(a) __va(a) | |
15 | #define virt_to_bus virt_to_phys | |
16 | #define bus_to_virt phys_to_virt | |
17 | ||
fabb8ff4 KM |
18 | static inline unsigned long isa_bus_to_virt(unsigned long addr) { |
19 | BUG(); | |
20 | return 0; | |
21 | } | |
22 | ||
23 | static inline unsigned long isa_virt_to_bus(void *addr) { | |
24 | BUG(); | |
25 | return 0; | |
26 | } | |
27 | ||
1da177e4 LT |
28 | /* |
29 | * Memory mapped I/O | |
30 | * | |
31 | * readX()/writeX() do byteswapping and take an ioremapped address | |
32 | * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. | |
33 | * gsc_*() don't byteswap and operate on physical addresses; | |
34 | * eg dev->hpa or 0xfee00000. | |
35 | */ | |
36 | ||
1da177e4 LT |
37 | static inline unsigned char gsc_readb(unsigned long addr) |
38 | { | |
39 | long flags; | |
40 | unsigned char ret; | |
41 | ||
1da177e4 LT |
42 | __asm__ __volatile__( |
43 | " rsm 2,%0\n" | |
44 | " ldbx 0(%2),%1\n" | |
45 | " mtsm %0\n" | |
46 | : "=&r" (flags), "=r" (ret) : "r" (addr) ); | |
47 | ||
48 | return ret; | |
49 | } | |
50 | ||
51 | static inline unsigned short gsc_readw(unsigned long addr) | |
52 | { | |
53 | long flags; | |
54 | unsigned short ret; | |
55 | ||
1da177e4 LT |
56 | __asm__ __volatile__( |
57 | " rsm 2,%0\n" | |
58 | " ldhx 0(%2),%1\n" | |
59 | " mtsm %0\n" | |
60 | : "=&r" (flags), "=r" (ret) : "r" (addr) ); | |
61 | ||
62 | return ret; | |
63 | } | |
64 | ||
65 | static inline unsigned int gsc_readl(unsigned long addr) | |
66 | { | |
67 | u32 ret; | |
68 | ||
1da177e4 LT |
69 | __asm__ __volatile__( |
70 | " ldwax 0(%1),%0\n" | |
71 | : "=r" (ret) : "r" (addr) ); | |
72 | ||
73 | return ret; | |
74 | } | |
75 | ||
76 | static inline unsigned long long gsc_readq(unsigned long addr) | |
77 | { | |
78 | unsigned long long ret; | |
1da177e4 | 79 | |
513e7ecd | 80 | #ifdef CONFIG_64BIT |
1da177e4 LT |
81 | __asm__ __volatile__( |
82 | " ldda 0(%1),%0\n" | |
83 | : "=r" (ret) : "r" (addr) ); | |
84 | #else | |
85 | /* two reads may have side effects.. */ | |
86 | ret = ((u64) gsc_readl(addr)) << 32; | |
87 | ret |= gsc_readl(addr+4); | |
88 | #endif | |
89 | return ret; | |
90 | } | |
91 | ||
92 | static inline void gsc_writeb(unsigned char val, unsigned long addr) | |
93 | { | |
94 | long flags; | |
1da177e4 LT |
95 | __asm__ __volatile__( |
96 | " rsm 2,%0\n" | |
97 | " stbs %1,0(%2)\n" | |
98 | " mtsm %0\n" | |
99 | : "=&r" (flags) : "r" (val), "r" (addr) ); | |
100 | } | |
101 | ||
102 | static inline void gsc_writew(unsigned short val, unsigned long addr) | |
103 | { | |
104 | long flags; | |
1da177e4 LT |
105 | __asm__ __volatile__( |
106 | " rsm 2,%0\n" | |
107 | " sths %1,0(%2)\n" | |
108 | " mtsm %0\n" | |
109 | : "=&r" (flags) : "r" (val), "r" (addr) ); | |
110 | } | |
111 | ||
112 | static inline void gsc_writel(unsigned int val, unsigned long addr) | |
113 | { | |
1da177e4 LT |
114 | __asm__ __volatile__( |
115 | " stwas %0,0(%1)\n" | |
116 | : : "r" (val), "r" (addr) ); | |
117 | } | |
118 | ||
119 | static inline void gsc_writeq(unsigned long long val, unsigned long addr) | |
120 | { | |
513e7ecd | 121 | #ifdef CONFIG_64BIT |
1da177e4 LT |
122 | __asm__ __volatile__( |
123 | " stda %0,0(%1)\n" | |
124 | : : "r" (val), "r" (addr) ); | |
125 | #else | |
126 | /* two writes may have side effects.. */ | |
127 | gsc_writel(val >> 32, addr); | |
128 | gsc_writel(val, addr+4); | |
129 | #endif | |
130 | } | |
131 | ||
132 | /* | |
133 | * The standard PCI ioremap interfaces | |
134 | */ | |
135 | ||
136 | extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); | |
137 | ||
1b52d7c2 KM |
138 | /* Most machines react poorly to I/O-space being cacheable... Instead let's |
139 | * define ioremap() in terms of ioremap_nocache(). | |
1da177e4 | 140 | */ |
1b52d7c2 | 141 | extern inline void __iomem * ioremap(unsigned long offset, unsigned long size) |
1da177e4 | 142 | { |
1b52d7c2 | 143 | return __ioremap(offset, size, _PAGE_NO_CACHE); |
1da177e4 | 144 | } |
1b52d7c2 | 145 | #define ioremap_nocache(off, sz) ioremap((off), (sz)) |
1da177e4 | 146 | |
01232e93 | 147 | extern void iounmap(const volatile void __iomem *addr); |
1da177e4 | 148 | |
1da177e4 LT |
149 | static inline unsigned char __raw_readb(const volatile void __iomem *addr) |
150 | { | |
151 | return (*(volatile unsigned char __force *) (addr)); | |
152 | } | |
153 | static inline unsigned short __raw_readw(const volatile void __iomem *addr) | |
154 | { | |
155 | return *(volatile unsigned short __force *) addr; | |
156 | } | |
157 | static inline unsigned int __raw_readl(const volatile void __iomem *addr) | |
158 | { | |
159 | return *(volatile unsigned int __force *) addr; | |
160 | } | |
161 | static inline unsigned long long __raw_readq(const volatile void __iomem *addr) | |
162 | { | |
163 | return *(volatile unsigned long long __force *) addr; | |
164 | } | |
165 | ||
166 | static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) | |
167 | { | |
168 | *(volatile unsigned char __force *) addr = b; | |
169 | } | |
170 | static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) | |
171 | { | |
172 | *(volatile unsigned short __force *) addr = b; | |
173 | } | |
174 | static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) | |
175 | { | |
176 | *(volatile unsigned int __force *) addr = b; | |
177 | } | |
178 | static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) | |
179 | { | |
180 | *(volatile unsigned long long __force *) addr = b; | |
181 | } | |
1da177e4 LT |
182 | |
183 | /* readb can never be const, so use __fswab instead of le*_to_cpu */ | |
184 | #define readb(addr) __raw_readb(addr) | |
185 | #define readw(addr) __fswab16(__raw_readw(addr)) | |
186 | #define readl(addr) __fswab32(__raw_readl(addr)) | |
187 | #define readq(addr) __fswab64(__raw_readq(addr)) | |
188 | #define writeb(b, addr) __raw_writeb(b, addr) | |
189 | #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr) | |
190 | #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr) | |
191 | #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr) | |
192 | ||
193 | #define readb_relaxed(addr) readb(addr) | |
194 | #define readw_relaxed(addr) readw(addr) | |
195 | #define readl_relaxed(addr) readl(addr) | |
196 | #define readq_relaxed(addr) readq(addr) | |
197 | ||
198 | #define mmiowb() do { } while (0) | |
199 | ||
200 | void memset_io(volatile void __iomem *addr, unsigned char val, int count); | |
201 | void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); | |
202 | void memcpy_toio(volatile void __iomem *dst, const void *src, int count); | |
203 | ||
1da177e4 LT |
204 | /* Port-space IO */ |
205 | ||
206 | #define inb_p inb | |
207 | #define inw_p inw | |
208 | #define inl_p inl | |
209 | #define outb_p outb | |
210 | #define outw_p outw | |
211 | #define outl_p outl | |
212 | ||
213 | extern unsigned char eisa_in8(unsigned short port); | |
214 | extern unsigned short eisa_in16(unsigned short port); | |
215 | extern unsigned int eisa_in32(unsigned short port); | |
216 | extern void eisa_out8(unsigned char data, unsigned short port); | |
217 | extern void eisa_out16(unsigned short data, unsigned short port); | |
218 | extern void eisa_out32(unsigned int data, unsigned short port); | |
219 | ||
220 | #if defined(CONFIG_PCI) | |
221 | extern unsigned char inb(int addr); | |
222 | extern unsigned short inw(int addr); | |
223 | extern unsigned int inl(int addr); | |
224 | ||
225 | extern void outb(unsigned char b, int addr); | |
226 | extern void outw(unsigned short b, int addr); | |
227 | extern void outl(unsigned int b, int addr); | |
228 | #elif defined(CONFIG_EISA) | |
229 | #define inb eisa_in8 | |
230 | #define inw eisa_in16 | |
231 | #define inl eisa_in32 | |
232 | #define outb eisa_out8 | |
233 | #define outw eisa_out16 | |
234 | #define outl eisa_out32 | |
235 | #else | |
236 | static inline char inb(unsigned long addr) | |
237 | { | |
238 | BUG(); | |
239 | return -1; | |
240 | } | |
241 | ||
242 | static inline short inw(unsigned long addr) | |
243 | { | |
244 | BUG(); | |
245 | return -1; | |
246 | } | |
247 | ||
248 | static inline int inl(unsigned long addr) | |
249 | { | |
250 | BUG(); | |
251 | return -1; | |
252 | } | |
253 | ||
254 | #define outb(x, y) BUG() | |
255 | #define outw(x, y) BUG() | |
256 | #define outl(x, y) BUG() | |
257 | #endif | |
258 | ||
259 | /* | |
260 | * String versions of in/out ops: | |
261 | */ | |
262 | extern void insb (unsigned long port, void *dst, unsigned long count); | |
263 | extern void insw (unsigned long port, void *dst, unsigned long count); | |
264 | extern void insl (unsigned long port, void *dst, unsigned long count); | |
265 | extern void outsb (unsigned long port, const void *src, unsigned long count); | |
266 | extern void outsw (unsigned long port, const void *src, unsigned long count); | |
267 | extern void outsl (unsigned long port, const void *src, unsigned long count); | |
268 | ||
269 | ||
270 | /* IO Port space is : BBiiii where BB is HBA number. */ | |
271 | #define IO_SPACE_LIMIT 0x00ffffff | |
272 | ||
1da177e4 LT |
273 | /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 |
274 | * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit | |
275 | * mode (essentially just sign extending. This macro takes in a 32 | |
276 | * bit I/O address (still with the leading f) and outputs the correct | |
277 | * value for either 32 or 64 bit mode */ | |
278 | #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) | |
279 | ||
280 | #include <asm-generic/iomap.h> | |
281 | ||
282 | /* | |
283 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem | |
284 | * access | |
285 | */ | |
286 | #define xlate_dev_mem_ptr(p) __va(p) | |
287 | ||
288 | /* | |
289 | * Convert a virtual cached pointer to an uncached pointer | |
290 | */ | |
291 | #define xlate_dev_kmem_ptr(p) p | |
292 | ||
293 | #endif |