Warning: This file is not a C or C++ file. It does not have highlighting.
1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
---|---|
2 | /* |
3 | * IO definitions for the Hexagon architecture |
4 | * |
5 | * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. |
6 | */ |
7 | |
8 | #ifndef _ASM_IO_H |
9 | #define _ASM_IO_H |
10 | |
11 | #ifdef __KERNEL__ |
12 | |
13 | #include <linux/types.h> |
14 | #include <asm/iomap.h> |
15 | #include <asm/page.h> |
16 | #include <asm/cacheflush.h> |
17 | |
18 | /* |
19 | * We don't have PCI yet. |
20 | * _IO_BASE is pointing at what should be unused virtual space. |
21 | */ |
22 | #define IO_SPACE_LIMIT 0xffff |
23 | #define _IO_BASE ((void __iomem *)0xfe000000) |
24 | |
25 | #define IOMEM(x) ((void __force __iomem *)(x)) |
26 | |
27 | extern int remap_area_pages(unsigned long start, unsigned long phys_addr, |
28 | unsigned long end, unsigned long flags); |
29 | |
30 | /* Defined in lib/io.c, needed for smc91x driver. */ |
31 | extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen); |
32 | extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen); |
33 | |
34 | extern void __raw_readsl(const void __iomem *addr, void *data, int wordlen); |
35 | extern void __raw_writesl(void __iomem *addr, const void *data, int wordlen); |
36 | |
37 | #define readsw(p, d, l) __raw_readsw(p, d, l) |
38 | #define writesw(p, d, l) __raw_writesw(p, d, l) |
39 | |
40 | #define readsl(p, d, l) __raw_readsl(p, d, l) |
41 | #define writesl(p, d, l) __raw_writesl(p, d, l) |
42 | |
43 | /* |
44 | * virt_to_phys - map virtual address to physical |
45 | * @address: address to map |
46 | */ |
47 | static inline unsigned long virt_to_phys(volatile void *address) |
48 | { |
49 | return __pa(address); |
50 | } |
51 | |
52 | /* |
53 | * phys_to_virt - map physical address to virtual |
54 | * @address: address to map |
55 | */ |
56 | static inline void *phys_to_virt(unsigned long address) |
57 | { |
58 | return __va(address); |
59 | } |
60 | |
61 | /* |
62 | * convert a physical pointer to a virtual kernel pointer for |
63 | * /dev/mem access. |
64 | */ |
65 | #define xlate_dev_mem_ptr(p) __va(p) |
66 | |
67 | /* |
68 | * IO port access primitives. Hexagon doesn't have special IO access |
69 | * instructions; all I/O is memory mapped. |
70 | * |
71 | * in/out are used for "ports", but we don't have "port instructions", |
72 | * so these are really just memory mapped too. |
73 | */ |
74 | |
75 | /* |
76 | * readb - read byte from memory mapped device |
77 | * @addr: pointer to memory |
78 | * |
79 | * Operates on "I/O bus memory space" |
80 | */ |
81 | static inline u8 readb(const volatile void __iomem *addr) |
82 | { |
83 | u8 val; |
84 | asm volatile( |
85 | "%0 = memb(%1);" |
86 | : "=&r" (val) |
87 | : "r" (addr) |
88 | ); |
89 | return val; |
90 | } |
91 | |
92 | static inline u16 readw(const volatile void __iomem *addr) |
93 | { |
94 | u16 val; |
95 | asm volatile( |
96 | "%0 = memh(%1);" |
97 | : "=&r" (val) |
98 | : "r" (addr) |
99 | ); |
100 | return val; |
101 | } |
102 | |
103 | static inline u32 readl(const volatile void __iomem *addr) |
104 | { |
105 | u32 val; |
106 | asm volatile( |
107 | "%0 = memw(%1);" |
108 | : "=&r" (val) |
109 | : "r" (addr) |
110 | ); |
111 | return val; |
112 | } |
113 | |
114 | /* |
115 | * writeb - write a byte to a memory location |
116 | * @data: data to write to |
117 | * @addr: pointer to memory |
118 | * |
119 | */ |
120 | static inline void writeb(u8 data, volatile void __iomem *addr) |
121 | { |
122 | asm volatile( |
123 | "memb(%0) = %1;" |
124 | : |
125 | : "r" (addr), "r" (data) |
126 | : "memory" |
127 | ); |
128 | } |
129 | |
130 | static inline void writew(u16 data, volatile void __iomem *addr) |
131 | { |
132 | asm volatile( |
133 | "memh(%0) = %1;" |
134 | : |
135 | : "r" (addr), "r" (data) |
136 | : "memory" |
137 | ); |
138 | |
139 | } |
140 | |
141 | static inline void writel(u32 data, volatile void __iomem *addr) |
142 | { |
143 | asm volatile( |
144 | "memw(%0) = %1;" |
145 | : |
146 | : "r" (addr), "r" (data) |
147 | : "memory" |
148 | ); |
149 | } |
150 | |
151 | #define __raw_writeb writeb |
152 | #define __raw_writew writew |
153 | #define __raw_writel writel |
154 | |
155 | #define __raw_readb readb |
156 | #define __raw_readw readw |
157 | #define __raw_readl readl |
158 | |
159 | /* |
160 | * http://comments.gmane.org/gmane.linux.ports.arm.kernel/117626 |
161 | */ |
162 | |
163 | #define readb_relaxed __raw_readb |
164 | #define readw_relaxed __raw_readw |
165 | #define readl_relaxed __raw_readl |
166 | |
167 | #define writeb_relaxed __raw_writeb |
168 | #define writew_relaxed __raw_writew |
169 | #define writel_relaxed __raw_writel |
170 | |
171 | /* |
172 | * I/O memory mapping functions. |
173 | */ |
174 | #define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ |
175 | (__HEXAGON_C_DEV << 6)) |
176 | |
177 | #define ioremap_uc(addr, size) ioremap((addr), (size)) |
178 | |
179 | |
180 | #define __raw_writel writel |
181 | |
182 | static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, |
183 | int count) |
184 | { |
185 | memcpy(dst, (void *) src, count); |
186 | } |
187 | |
188 | static inline void memcpy_toio(volatile void __iomem *dst, const void *src, |
189 | int count) |
190 | { |
191 | memcpy((void *) dst, src, count); |
192 | } |
193 | |
194 | static inline void memset_io(volatile void __iomem *addr, int value, |
195 | size_t size) |
196 | { |
197 | memset((void __force *)addr, value, size); |
198 | } |
199 | |
200 | #define PCI_IO_ADDR (volatile void __iomem *) |
201 | |
202 | /* |
203 | * inb - read byte from I/O port or something |
204 | * @port: address in I/O space |
205 | * |
206 | * Operates on "I/O bus I/O space" |
207 | */ |
208 | static inline u8 inb(unsigned long port) |
209 | { |
210 | return readb(_IO_BASE + (port & IO_SPACE_LIMIT)); |
211 | } |
212 | |
213 | static inline u16 inw(unsigned long port) |
214 | { |
215 | return readw(_IO_BASE + (port & IO_SPACE_LIMIT)); |
216 | } |
217 | |
218 | static inline u32 inl(unsigned long port) |
219 | { |
220 | return readl(_IO_BASE + (port & IO_SPACE_LIMIT)); |
221 | } |
222 | |
223 | /* |
224 | * outb - write a byte to a memory location |
225 | * @data: data to write to |
226 | * @addr: address in I/O space |
227 | */ |
228 | static inline void outb(u8 data, unsigned long port) |
229 | { |
230 | writeb(data, _IO_BASE + (port & IO_SPACE_LIMIT)); |
231 | } |
232 | |
233 | static inline void outw(u16 data, unsigned long port) |
234 | { |
235 | writew(data, _IO_BASE + (port & IO_SPACE_LIMIT)); |
236 | } |
237 | |
238 | static inline void outl(u32 data, unsigned long port) |
239 | { |
240 | writel(data, _IO_BASE + (port & IO_SPACE_LIMIT)); |
241 | } |
242 | |
243 | #define outb_p outb |
244 | #define outw_p outw |
245 | #define outl_p outl |
246 | |
247 | #define inb_p inb |
248 | #define inw_p inw |
249 | #define inl_p inl |
250 | |
251 | static inline void insb(unsigned long port, void *buffer, int count) |
252 | { |
253 | if (count) { |
254 | u8 *buf = buffer; |
255 | do { |
256 | u8 x = inb(port); |
257 | *buf++ = x; |
258 | } while (--count); |
259 | } |
260 | } |
261 | |
262 | static inline void insw(unsigned long port, void *buffer, int count) |
263 | { |
264 | if (count) { |
265 | u16 *buf = buffer; |
266 | do { |
267 | u16 x = inw(port); |
268 | *buf++ = x; |
269 | } while (--count); |
270 | } |
271 | } |
272 | |
273 | static inline void insl(unsigned long port, void *buffer, int count) |
274 | { |
275 | if (count) { |
276 | u32 *buf = buffer; |
277 | do { |
278 | u32 x = inw(port); |
279 | *buf++ = x; |
280 | } while (--count); |
281 | } |
282 | } |
283 | |
284 | static inline void outsb(unsigned long port, const void *buffer, int count) |
285 | { |
286 | if (count) { |
287 | const u8 *buf = buffer; |
288 | do { |
289 | outb(*buf++, port); |
290 | } while (--count); |
291 | } |
292 | } |
293 | |
294 | static inline void outsw(unsigned long port, const void *buffer, int count) |
295 | { |
296 | if (count) { |
297 | const u16 *buf = buffer; |
298 | do { |
299 | outw(*buf++, port); |
300 | } while (--count); |
301 | } |
302 | } |
303 | |
304 | static inline void outsl(unsigned long port, const void *buffer, int count) |
305 | { |
306 | if (count) { |
307 | const u32 *buf = buffer; |
308 | do { |
309 | outl(*buf++, port); |
310 | } while (--count); |
311 | } |
312 | } |
313 | |
314 | /* |
315 | * These defines are necessary to use the generic io.h for filling in |
316 | * the missing parts of the API contract. This is because the platform |
317 | * uses (inline) functions rather than defines and the generic helper |
318 | * fills in the undefined. |
319 | */ |
320 | #define virt_to_phys virt_to_phys |
321 | #define phys_to_virt phys_to_virt |
322 | #define memset_io memset_io |
323 | #define memcpy_fromio memcpy_fromio |
324 | #define memcpy_toio memcpy_toio |
325 | #define readb readb |
326 | #define readw readw |
327 | #define readl readl |
328 | #define writeb writeb |
329 | #define writew writew |
330 | #define writel writel |
331 | #define insb insb |
332 | #define insw insw |
333 | #define insl insl |
334 | #define outsb outsb |
335 | #define outsw outsw |
336 | #define outsl outsl |
337 | #include <asm-generic/io.h> |
338 | |
339 | #endif /* __KERNEL__ */ |
340 | |
341 | #endif |
342 |
Warning: This file is not a C or C++ file. It does not have highlighting.