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1da177e4 | 1 | /* |
4baa9922 | 2 | * arch/arm/include/asm/io.h |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1996-2000 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Modifications: | |
11 | * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both | |
12 | * constant addresses and variable addresses. | |
13 | * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture | |
14 | * specific IO header files. | |
15 | * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. | |
16 | * 04-Apr-1999 PJB Added check_signature. | |
17 | * 12-Dec-1999 RMK More cleanups | |
18 | * 18-Jun-2000 RMK Removed virt_to_* and friends definitions | |
19 | * 05-Oct-2004 BJD Moved memory string functions to use void __iomem | |
20 | */ | |
21 | #ifndef __ASM_ARM_IO_H | |
22 | #define __ASM_ARM_IO_H | |
23 | ||
24 | #ifdef __KERNEL__ | |
25 | ||
26 | #include <linux/types.h> | |
27 | #include <asm/byteorder.h> | |
28 | #include <asm/memory.h> | |
79f64dbf | 29 | #include <asm/system.h> |
1da177e4 LT |
30 | |
31 | /* | |
32 | * ISA I/O bus memory addresses are 1:1 with the physical address. | |
33 | */ | |
34 | #define isa_virt_to_bus virt_to_phys | |
35 | #define isa_page_to_bus page_to_phys | |
36 | #define isa_bus_to_virt phys_to_virt | |
37 | ||
38 | /* | |
39 | * Generic IO read/write. These perform native-endian accesses. Note | |
40 | * that some architectures will want to re-define __raw_{read,write}w. | |
41 | */ | |
42 | extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen); | |
43 | extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen); | |
44 | extern void __raw_writesl(void __iomem *addr, const void *data, int longlen); | |
45 | ||
a0d95af5 DS |
46 | extern void __raw_readsb(const void __iomem *addr, void *data, int bytelen); |
47 | extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen); | |
48 | extern void __raw_readsl(const void __iomem *addr, void *data, int longlen); | |
1da177e4 LT |
49 | |
50 | #define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a) = (v)) | |
51 | #define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a) = (v)) | |
52 | #define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a) = (v)) | |
53 | ||
54 | #define __raw_readb(a) (__chk_io_ptr(a), *(volatile unsigned char __force *)(a)) | |
55 | #define __raw_readw(a) (__chk_io_ptr(a), *(volatile unsigned short __force *)(a)) | |
56 | #define __raw_readl(a) (__chk_io_ptr(a), *(volatile unsigned int __force *)(a)) | |
57 | ||
67a1901f RK |
58 | /* |
59 | * Architecture ioremap implementation. | |
60 | */ | |
3603ab2b RK |
61 | #define MT_DEVICE 0 |
62 | #define MT_DEVICE_NONSHARED 1 | |
63 | #define MT_DEVICE_CACHED 2 | |
db5b7169 | 64 | #define MT_DEVICE_WC 3 |
3603ab2b | 65 | /* |
db5b7169 | 66 | * types 4 onwards can be found in asm/mach/map.h and are undefined |
3603ab2b RK |
67 | * for ioremap |
68 | */ | |
69 | ||
70 | /* | |
71 | * __arm_ioremap takes CPU physical address. | |
72 | * __arm_ioremap_pfn takes a Page Frame Number and an offset into that page | |
31aa8fd6 RK |
73 | * The _caller variety takes a __builtin_return_address(0) value for |
74 | * /proc/vmalloc to use - and should only be used in non-inline functions. | |
3603ab2b | 75 | */ |
31aa8fd6 RK |
76 | extern void __iomem *__arm_ioremap_pfn_caller(unsigned long, unsigned long, |
77 | size_t, unsigned int, void *); | |
78 | extern void __iomem *__arm_ioremap_caller(unsigned long, size_t, unsigned int, | |
79 | void *); | |
80 | ||
81 | extern void __iomem *__arm_ioremap_pfn(unsigned long, unsigned long, size_t, unsigned int); | |
82 | extern void __iomem *__arm_ioremap(unsigned long, size_t, unsigned int); | |
1622605c | 83 | extern void __iounmap(volatile void __iomem *addr); |
67a1901f | 84 | |
1da177e4 LT |
85 | /* |
86 | * Bad read/write accesses... | |
87 | */ | |
88 | extern void __readwrite_bug(const char *fn); | |
89 | ||
0560cf5a RK |
90 | /* |
91 | * A typesafe __io() helper | |
92 | */ | |
93 | static inline void __iomem *__typesafe_io(unsigned long addr) | |
94 | { | |
95 | return (void __iomem *)addr; | |
96 | } | |
97 | ||
1da177e4 LT |
98 | /* |
99 | * Now, pick up the machine-defined IO definitions | |
100 | */ | |
a09e64fb | 101 | #include <mach/io.h> |
1da177e4 | 102 | |
1da177e4 LT |
103 | /* |
104 | * IO port access primitives | |
105 | * ------------------------- | |
106 | * | |
107 | * The ARM doesn't have special IO access instructions; all IO is memory | |
108 | * mapped. Note that these are defined to perform little endian accesses | |
109 | * only. Their primary purpose is to access PCI and ISA peripherals. | |
110 | * | |
111 | * Note that for a big endian machine, this implies that the following | |
c79ebfa8 | 112 | * big endian mode connectivity is in place, as described by numerous |
1da177e4 LT |
113 | * ARM documents: |
114 | * | |
115 | * PCI: D0-D7 D8-D15 D16-D23 D24-D31 | |
116 | * ARM: D24-D31 D16-D23 D8-D15 D0-D7 | |
117 | * | |
118 | * The machine specific io.h include defines __io to translate an "IO" | |
119 | * address to a memory address. | |
120 | * | |
121 | * Note that we prevent GCC re-ordering or caching values in expressions | |
122 | * by introducing sequence points into the in*() definitions. Note that | |
123 | * __raw_* do not guarantee this behaviour. | |
124 | * | |
125 | * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. | |
126 | */ | |
127 | #ifdef __io | |
128 | #define outb(v,p) __raw_writeb(v,__io(p)) | |
05f9869b OK |
129 | #define outw(v,p) __raw_writew((__force __u16) \ |
130 | cpu_to_le16(v),__io(p)) | |
131 | #define outl(v,p) __raw_writel((__force __u32) \ | |
132 | cpu_to_le32(v),__io(p)) | |
1da177e4 | 133 | |
05f9869b OK |
134 | #define inb(p) ({ __u8 __v = __raw_readb(__io(p)); __v; }) |
135 | #define inw(p) ({ __u16 __v = le16_to_cpu((__force __le16) \ | |
136 | __raw_readw(__io(p))); __v; }) | |
137 | #define inl(p) ({ __u32 __v = le32_to_cpu((__force __le32) \ | |
138 | __raw_readl(__io(p))); __v; }) | |
1da177e4 LT |
139 | |
140 | #define outsb(p,d,l) __raw_writesb(__io(p),d,l) | |
141 | #define outsw(p,d,l) __raw_writesw(__io(p),d,l) | |
142 | #define outsl(p,d,l) __raw_writesl(__io(p),d,l) | |
143 | ||
144 | #define insb(p,d,l) __raw_readsb(__io(p),d,l) | |
145 | #define insw(p,d,l) __raw_readsw(__io(p),d,l) | |
146 | #define insl(p,d,l) __raw_readsl(__io(p),d,l) | |
147 | #endif | |
148 | ||
149 | #define outb_p(val,port) outb((val),(port)) | |
150 | #define outw_p(val,port) outw((val),(port)) | |
151 | #define outl_p(val,port) outl((val),(port)) | |
152 | #define inb_p(port) inb((port)) | |
153 | #define inw_p(port) inw((port)) | |
154 | #define inl_p(port) inl((port)) | |
155 | ||
156 | #define outsb_p(port,from,len) outsb(port,from,len) | |
157 | #define outsw_p(port,from,len) outsw(port,from,len) | |
158 | #define outsl_p(port,from,len) outsl(port,from,len) | |
159 | #define insb_p(port,to,len) insb(port,to,len) | |
160 | #define insw_p(port,to,len) insw(port,to,len) | |
161 | #define insl_p(port,to,len) insl(port,to,len) | |
162 | ||
163 | /* | |
164 | * String version of IO memory access ops: | |
165 | */ | |
d2f60748 RK |
166 | extern void _memcpy_fromio(void *, const volatile void __iomem *, size_t); |
167 | extern void _memcpy_toio(volatile void __iomem *, const void *, size_t); | |
168 | extern void _memset_io(volatile void __iomem *, int, size_t); | |
1da177e4 LT |
169 | |
170 | #define mmiowb() | |
171 | ||
172 | /* | |
173 | * Memory access primitives | |
174 | * ------------------------ | |
175 | * | |
176 | * These perform PCI memory accesses via an ioremap region. They don't | |
177 | * take an address as such, but a cookie. | |
178 | * | |
179 | * Again, this are defined to perform little endian accesses. See the | |
180 | * IO port primitives for more information. | |
181 | */ | |
182 | #ifdef __mem_pci | |
e936771a CM |
183 | #define readb_relaxed(c) ({ u8 __v = __raw_readb(__mem_pci(c)); __v; }) |
184 | #define readw_relaxed(c) ({ u16 __v = le16_to_cpu((__force __le16) \ | |
05f9869b | 185 | __raw_readw(__mem_pci(c))); __v; }) |
e936771a | 186 | #define readl_relaxed(c) ({ u32 __v = le32_to_cpu((__force __le32) \ |
05f9869b | 187 | __raw_readl(__mem_pci(c))); __v; }) |
e936771a CM |
188 | |
189 | #define writeb_relaxed(v,c) ((void)__raw_writeb(v,__mem_pci(c))) | |
190 | #define writew_relaxed(v,c) ((void)__raw_writew((__force u16) \ | |
191 | cpu_to_le16(v),__mem_pci(c))) | |
192 | #define writel_relaxed(v,c) ((void)__raw_writel((__force u32) \ | |
193 | cpu_to_le32(v),__mem_pci(c))) | |
194 | ||
79f64dbf | 195 | #ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE |
b92b3612 RK |
196 | #define __iormb() rmb() |
197 | #define __iowmb() wmb() | |
79f64dbf | 198 | #else |
b92b3612 RK |
199 | #define __iormb() do { } while (0) |
200 | #define __iowmb() do { } while (0) | |
79f64dbf | 201 | #endif |
1da177e4 | 202 | |
b92b3612 RK |
203 | #define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; }) |
204 | #define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; }) | |
205 | #define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; }) | |
206 | ||
207 | #define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); }) | |
208 | #define writew(v,c) ({ __iowmb(); writew_relaxed(v,c); }) | |
209 | #define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); }) | |
210 | ||
1da177e4 LT |
211 | #define readsb(p,d,l) __raw_readsb(__mem_pci(p),d,l) |
212 | #define readsw(p,d,l) __raw_readsw(__mem_pci(p),d,l) | |
213 | #define readsl(p,d,l) __raw_readsl(__mem_pci(p),d,l) | |
214 | ||
1da177e4 LT |
215 | #define writesb(p,d,l) __raw_writesb(__mem_pci(p),d,l) |
216 | #define writesw(p,d,l) __raw_writesw(__mem_pci(p),d,l) | |
217 | #define writesl(p,d,l) __raw_writesl(__mem_pci(p),d,l) | |
218 | ||
219 | #define memset_io(c,v,l) _memset_io(__mem_pci(c),(v),(l)) | |
220 | #define memcpy_fromio(a,c,l) _memcpy_fromio((a),__mem_pci(c),(l)) | |
221 | #define memcpy_toio(c,a,l) _memcpy_toio(__mem_pci(c),(a),(l)) | |
222 | ||
1da177e4 LT |
223 | #elif !defined(readb) |
224 | ||
225 | #define readb(c) (__readwrite_bug("readb"),0) | |
226 | #define readw(c) (__readwrite_bug("readw"),0) | |
227 | #define readl(c) (__readwrite_bug("readl"),0) | |
228 | #define writeb(v,c) __readwrite_bug("writeb") | |
229 | #define writew(v,c) __readwrite_bug("writew") | |
230 | #define writel(v,c) __readwrite_bug("writel") | |
231 | ||
1da177e4 LT |
232 | #define check_signature(io,sig,len) (0) |
233 | ||
234 | #endif /* __mem_pci */ | |
235 | ||
1da177e4 LT |
236 | /* |
237 | * ioremap and friends. | |
238 | * | |
239 | * ioremap takes a PCI memory address, as specified in | |
240 | * Documentation/IO-mapping.txt. | |
9d4ae727 | 241 | * |
1da177e4 | 242 | */ |
1da177e4 | 243 | #ifndef __arch_ioremap |
3603ab2b RK |
244 | #define ioremap(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE) |
245 | #define ioremap_nocache(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE) | |
246 | #define ioremap_cached(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE_CACHED) | |
1ad77a87 | 247 | #define ioremap_wc(cookie,size) __arm_ioremap(cookie, size, MT_DEVICE_WC) |
1da177e4 LT |
248 | #define iounmap(cookie) __iounmap(cookie) |
249 | #else | |
3603ab2b RK |
250 | #define ioremap(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE) |
251 | #define ioremap_nocache(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE) | |
252 | #define ioremap_cached(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE_CACHED) | |
1ad77a87 | 253 | #define ioremap_wc(cookie,size) __arch_ioremap((cookie), (size), MT_DEVICE_WC) |
1da177e4 LT |
254 | #define iounmap(cookie) __arch_iounmap(cookie) |
255 | #endif | |
256 | ||
09f0551d RK |
257 | /* |
258 | * io{read,write}{8,16,32} macros | |
259 | */ | |
7533fca8 | 260 | #ifndef ioread8 |
b92b3612 RK |
261 | #define ioread8(p) ({ unsigned int __v = __raw_readb(p); __iormb(); __v; }) |
262 | #define ioread16(p) ({ unsigned int __v = le16_to_cpu((__force __le16)__raw_readw(p)); __iormb(); __v; }) | |
263 | #define ioread32(p) ({ unsigned int __v = le32_to_cpu((__force __le32)__raw_readl(p)); __iormb(); __v; }) | |
09f0551d | 264 | |
b92b3612 RK |
265 | #define iowrite8(v,p) ({ __iowmb(); (void)__raw_writeb(v, p); }) |
266 | #define iowrite16(v,p) ({ __iowmb(); (void)__raw_writew((__force __u16)cpu_to_le16(v), p); }) | |
267 | #define iowrite32(v,p) ({ __iowmb(); (void)__raw_writel((__force __u32)cpu_to_le32(v), p); }) | |
09f0551d RK |
268 | |
269 | #define ioread8_rep(p,d,c) __raw_readsb(p,d,c) | |
270 | #define ioread16_rep(p,d,c) __raw_readsw(p,d,c) | |
271 | #define ioread32_rep(p,d,c) __raw_readsl(p,d,c) | |
272 | ||
273 | #define iowrite8_rep(p,s,c) __raw_writesb(p,s,c) | |
274 | #define iowrite16_rep(p,s,c) __raw_writesw(p,s,c) | |
275 | #define iowrite32_rep(p,s,c) __raw_writesl(p,s,c) | |
276 | ||
277 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr); | |
278 | extern void ioport_unmap(void __iomem *addr); | |
7533fca8 | 279 | #endif |
09f0551d RK |
280 | |
281 | struct pci_dev; | |
282 | ||
283 | extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen); | |
284 | extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr); | |
285 | ||
1da177e4 LT |
286 | /* |
287 | * can the hardware map this into one segment or not, given no other | |
288 | * constraints. | |
289 | */ | |
290 | #define BIOVEC_MERGEABLE(vec1, vec2) \ | |
291 | ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) | |
292 | ||
95ba71f7 | 293 | #ifdef CONFIG_MMU |
51635ad2 LB |
294 | #define ARCH_HAS_VALID_PHYS_ADDR_RANGE |
295 | extern int valid_phys_addr_range(unsigned long addr, size_t size); | |
296 | extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); | |
95ba71f7 | 297 | #endif |
51635ad2 | 298 | |
1da177e4 LT |
299 | /* |
300 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem | |
301 | * access | |
302 | */ | |
303 | #define xlate_dev_mem_ptr(p) __va(p) | |
304 | ||
305 | /* | |
306 | * Convert a virtual cached pointer to an uncached pointer | |
307 | */ | |
308 | #define xlate_dev_kmem_ptr(p) p | |
309 | ||
1645f20b RK |
310 | /* |
311 | * Register ISA memory and port locations for glibc iopl/inb/outb | |
312 | * emulation. | |
313 | */ | |
314 | extern void register_isa_ports(unsigned int mmio, unsigned int io, | |
315 | unsigned int io_shift); | |
316 | ||
1da177e4 LT |
317 | #endif /* __KERNEL__ */ |
318 | #endif /* __ASM_ARM_IO_H */ |