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1 /* io.h: FRV I/O operations
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
11 * This gets interesting when talking to the PCI bus - the CPU is in big endian
12 * mode, the PCI bus is little endian and the hardware in the middle can do
20 #define ARCH_HAS_IOREMAP_WT
22 #include <linux/types.h>
23 #include <asm/virtconvert.h>
24 #include <asm/string.h>
25 #include <asm/mb-regs.h>
26 #include <asm-generic/pci_iomap.h>
27 #include <linux/delay.h>
30 * swap functions are sometimes needed to interface little-endian hardware
33 static inline unsigned short _swapw(unsigned short v
)
35 return ((v
<< 8) | (v
>> 8));
38 static inline unsigned long _swapl(unsigned long v
)
40 return ((v
<< 24) | ((v
& 0xff00) << 8) | ((v
& 0xff0000) >> 8) | (v
>> 24));
43 //#define __iormb() asm volatile("membar")
44 //#define __iowmb() asm volatile("membar")
46 #define __raw_readb __builtin_read8
47 #define __raw_readw __builtin_read16
48 #define __raw_readl __builtin_read32
50 #define __raw_writeb(datum, addr) __builtin_write8(addr, datum)
51 #define __raw_writew(datum, addr) __builtin_write16(addr, datum)
52 #define __raw_writel(datum, addr) __builtin_write32(addr, datum)
54 static inline void io_outsb(unsigned int addr
, const void *buf
, int len
)
56 unsigned long __ioaddr
= (unsigned long) addr
;
57 const uint8_t *bp
= buf
;
60 __builtin_write8((volatile void __iomem
*) __ioaddr
, *bp
++);
63 static inline void io_outsw(unsigned int addr
, const void *buf
, int len
)
65 unsigned long __ioaddr
= (unsigned long) addr
;
66 const uint16_t *bp
= buf
;
69 __builtin_write16((volatile void __iomem
*) __ioaddr
, (*bp
++));
72 extern void __outsl_ns(unsigned int addr
, const void *buf
, int len
);
73 extern void __outsl_sw(unsigned int addr
, const void *buf
, int len
);
74 static inline void __outsl(unsigned int addr
, const void *buf
, int len
, int swap
)
76 unsigned long __ioaddr
= (unsigned long) addr
;
79 __outsl_ns(__ioaddr
, buf
, len
);
81 __outsl_sw(__ioaddr
, buf
, len
);
84 static inline void io_insb(unsigned long addr
, void *buf
, int len
)
89 *bp
++ = __builtin_read8((volatile void __iomem
*) addr
);
92 static inline void io_insw(unsigned long addr
, void *buf
, int len
)
97 *bp
++ = __builtin_read16((volatile void __iomem
*) addr
);
100 extern void __insl_ns(unsigned long addr
, void *buf
, int len
);
101 extern void __insl_sw(unsigned long addr
, void *buf
, int len
);
102 static inline void __insl(unsigned long addr
, void *buf
, int len
, int swap
)
105 __insl_ns(addr
, buf
, len
);
107 __insl_sw(addr
, buf
, len
);
110 #define mmiowb() mb()
113 * make the short names macros so specific devices
114 * can override them as required
117 static inline void memset_io(volatile void __iomem
*addr
, unsigned char val
, int count
)
119 memset((void __force
*) addr
, val
, count
);
122 static inline void memcpy_fromio(void *dst
, const volatile void __iomem
*src
, int count
)
124 memcpy(dst
, (void __force
*) src
, count
);
127 static inline void memcpy_toio(volatile void __iomem
*dst
, const void *src
, int count
)
129 memcpy((void __force
*) dst
, src
, count
);
132 static inline uint8_t inb(unsigned long addr
)
134 return __builtin_read8((void __iomem
*)addr
);
137 static inline uint16_t inw(unsigned long addr
)
139 uint16_t ret
= __builtin_read16((void __iomem
*)addr
);
141 if (__is_PCI_IO(addr
))
147 static inline uint32_t inl(unsigned long addr
)
149 uint32_t ret
= __builtin_read32((void __iomem
*)addr
);
151 if (__is_PCI_IO(addr
))
157 static inline void outb(uint8_t datum
, unsigned long addr
)
159 __builtin_write8((void __iomem
*)addr
, datum
);
162 static inline void outw(uint16_t datum
, unsigned long addr
)
164 if (__is_PCI_IO(addr
))
165 datum
= _swapw(datum
);
166 __builtin_write16((void __iomem
*)addr
, datum
);
169 static inline void outl(uint32_t datum
, unsigned long addr
)
171 if (__is_PCI_IO(addr
))
172 datum
= _swapl(datum
);
173 __builtin_write32((void __iomem
*)addr
, datum
);
176 #define inb_p(addr) inb(addr)
177 #define inw_p(addr) inw(addr)
178 #define inl_p(addr) inl(addr)
179 #define outb_p(x,addr) outb(x,addr)
180 #define outw_p(x,addr) outw(x,addr)
181 #define outl_p(x,addr) outl(x,addr)
183 #define outsb(a,b,l) io_outsb(a,b,l)
184 #define outsw(a,b,l) io_outsw(a,b,l)
185 #define outsl(a,b,l) __outsl(a,b,l,0)
187 #define insb(a,b,l) io_insb(a,b,l)
188 #define insw(a,b,l) io_insw(a,b,l)
189 #define insl(a,b,l) __insl(a,b,l,0)
191 #define IO_SPACE_LIMIT 0xffffffff
193 static inline uint8_t readb(const volatile void __iomem
*addr
)
195 return __builtin_read8((__force
void volatile __iomem
*) addr
);
198 static inline uint16_t readw(const volatile void __iomem
*addr
)
200 uint16_t ret
= __builtin_read16((__force
void volatile __iomem
*)addr
);
202 if (__is_PCI_MEM(addr
))
207 static inline uint32_t readl(const volatile void __iomem
*addr
)
209 uint32_t ret
= __builtin_read32((__force
void volatile __iomem
*)addr
);
211 if (__is_PCI_MEM(addr
))
217 #define readb_relaxed readb
218 #define readw_relaxed readw
219 #define readl_relaxed readl
221 static inline void writeb(uint8_t datum
, volatile void __iomem
*addr
)
223 __builtin_write8(addr
, datum
);
224 if (__is_PCI_MEM(addr
))
225 __flush_PCI_writes();
228 static inline void writew(uint16_t datum
, volatile void __iomem
*addr
)
230 if (__is_PCI_MEM(addr
))
231 datum
= _swapw(datum
);
233 __builtin_write16(addr
, datum
);
234 if (__is_PCI_MEM(addr
))
235 __flush_PCI_writes();
238 static inline void writel(uint32_t datum
, volatile void __iomem
*addr
)
240 if (__is_PCI_MEM(addr
))
241 datum
= _swapl(datum
);
243 __builtin_write32(addr
, datum
);
244 if (__is_PCI_MEM(addr
))
245 __flush_PCI_writes();
248 #define writeb_relaxed writeb
249 #define writew_relaxed writew
250 #define writel_relaxed writel
252 /* Values for nocacheflag and cmode */
253 #define IOMAP_FULL_CACHING 0
254 #define IOMAP_NOCACHE_SER 1
255 #define IOMAP_NOCACHE_NONSER 2
256 #define IOMAP_WRITETHROUGH 3
258 extern void __iomem
*__ioremap(unsigned long physaddr
, unsigned long size
, int cacheflag
);
260 static inline void __iomem
*ioremap(unsigned long physaddr
, unsigned long size
)
262 return __ioremap(physaddr
, size
, IOMAP_NOCACHE_SER
);
265 static inline void __iomem
*ioremap_nocache(unsigned long physaddr
, unsigned long size
)
267 return __ioremap(physaddr
, size
, IOMAP_NOCACHE_SER
);
270 static inline void __iomem
*ioremap_wt(unsigned long physaddr
, unsigned long size
)
272 return __ioremap(physaddr
, size
, IOMAP_WRITETHROUGH
);
275 static inline void __iomem
*ioremap_fullcache(unsigned long physaddr
, unsigned long size
)
277 return __ioremap(physaddr
, size
, IOMAP_FULL_CACHING
);
280 #define ioremap_wc ioremap_nocache
282 extern void iounmap(void volatile __iomem
*addr
);
284 static inline void __iomem
*ioport_map(unsigned long port
, unsigned int nr
)
286 return (void __iomem
*) port
;
289 static inline void ioport_unmap(void __iomem
*p
)
293 static inline void flush_write_buffers(void)
295 __asm__
__volatile__ ("membar" : : :"memory");
299 * do appropriate I/O accesses for token type
301 static inline unsigned int ioread8(void __iomem
*p
)
303 return __builtin_read8(p
);
306 static inline unsigned int ioread16(void __iomem
*p
)
308 uint16_t ret
= __builtin_read16(p
);
309 if (__is_PCI_addr(p
))
314 static inline unsigned int ioread32(void __iomem
*p
)
316 uint32_t ret
= __builtin_read32(p
);
317 if (__is_PCI_addr(p
))
322 static inline void iowrite8(u8 val
, void __iomem
*p
)
324 __builtin_write8(p
, val
);
326 __flush_PCI_writes();
329 static inline void iowrite16(u16 val
, void __iomem
*p
)
331 if (__is_PCI_addr(p
))
333 __builtin_write16(p
, val
);
335 __flush_PCI_writes();
338 static inline void iowrite32(u32 val
, void __iomem
*p
)
340 if (__is_PCI_addr(p
))
342 __builtin_write32(p
, val
);
344 __flush_PCI_writes();
347 #define ioread16be(addr) be16_to_cpu(ioread16(addr))
348 #define ioread32be(addr) be32_to_cpu(ioread32(addr))
349 #define iowrite16be(v, addr) iowrite16(cpu_to_be16(v), (addr))
350 #define iowrite32be(v, addr) iowrite32(cpu_to_be32(v), (addr))
352 static inline void ioread8_rep(void __iomem
*p
, void *dst
, unsigned long count
)
354 io_insb((unsigned long) p
, dst
, count
);
357 static inline void ioread16_rep(void __iomem
*p
, void *dst
, unsigned long count
)
359 io_insw((unsigned long) p
, dst
, count
);
362 static inline void ioread32_rep(void __iomem
*p
, void *dst
, unsigned long count
)
364 __insl_ns((unsigned long) p
, dst
, count
);
367 static inline void iowrite8_rep(void __iomem
*p
, const void *src
, unsigned long count
)
369 io_outsb((unsigned long) p
, src
, count
);
372 static inline void iowrite16_rep(void __iomem
*p
, const void *src
, unsigned long count
)
374 io_outsw((unsigned long) p
, src
, count
);
377 static inline void iowrite32_rep(void __iomem
*p
, const void *src
, unsigned long count
)
379 __outsl_ns((unsigned long) p
, src
, count
);
382 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
384 static inline void pci_iounmap(struct pci_dev
*dev
, void __iomem
*p
)
390 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
393 #define xlate_dev_mem_ptr(p) __va(p)
396 * Convert a virtual cached pointer to an uncached pointer
398 #define xlate_dev_kmem_ptr(p) p
400 #endif /* __KERNEL__ */
402 #endif /* _ASM_IO_H */