[linux-block.git] / include / asm-frv / io.h

/* io.h: FRV I/O operations
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * This gets interesting when talking to the PCI bus - the CPU is in big endian
 * mode, the PCI bus is little endian and the hardware in the middle can do
 * byte swapping
 */
#ifndef _ASM_IO_H
#define _ASM_IO_H

#ifdef __KERNEL__

#include <linux/types.h>
#include <asm/virtconvert.h>
#include <asm/string.h>
#include <asm/mb-regs.h>
#include <linux/delay.h>

/*
 * swap functions are sometimes needed to interface little-endian hardware
 */

static inline unsigned short _swapw(unsigned short v)
{
    return ((v << 8) | (v >> 8));
}

static inline unsigned long _swapl(unsigned long v)
{
    return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
}

//#define __iormb() asm volatile("membar")
//#define __iowmb() asm volatile("membar")

#define __raw_readb __builtin_read8
#define __raw_readw __builtin_read16
#define __raw_readl __builtin_read32

#define __raw_writeb(datum, addr) __builtin_write8(addr, datum)
#define __raw_writew(datum, addr) __builtin_write16(addr, datum)
#define __raw_writel(datum, addr) __builtin_write32(addr, datum)

static inline void io_outsb(unsigned int addr, const void *buf, int len)
{
	unsigned long __ioaddr = (unsigned long) addr;
	const uint8_t *bp = buf;

	while (len--)
		__builtin_write8((volatile void __iomem *) __ioaddr, *bp++);
}

static inline void io_outsw(unsigned int addr, const void *buf, int len)
{
	unsigned long __ioaddr = (unsigned long) addr;
	const uint16_t *bp = buf;

	while (len--)
		__builtin_write16((volatile void __iomem *) __ioaddr, (*bp++));
}

extern void __outsl_ns(unsigned int addr, const void *buf, int len);
extern void __outsl_sw(unsigned int addr, const void *buf, int len);
static inline void __outsl(unsigned int addr, const void *buf, int len, int swap)
{
	unsigned long __ioaddr = (unsigned long) addr;

	if (!swap)
		__outsl_ns(__ioaddr, buf, len);
	else
		__outsl_sw(__ioaddr, buf, len);
}

static inline void io_insb(unsigned long addr, void *buf, int len)
{
	uint8_t *bp = buf;

	while (len--)
		*bp++ = __builtin_read8((volatile void __iomem *) addr);
}

static inline void io_insw(unsigned long addr, void *buf, int len)
{
	uint16_t *bp = buf;

	while (len--)
		*bp++ = __builtin_read16((volatile void __iomem *) addr);
}

extern void __insl_ns(unsigned long addr, void *buf, int len);
extern void __insl_sw(unsigned long addr, void *buf, int len);
static inline void __insl(unsigned long addr, void *buf, int len, int swap)
{
	if (!swap)
		__insl_ns(addr, buf, len);
	else
		__insl_sw(addr, buf, len);
}

#define mmiowb() mb()

/*
 *	make the short names macros so specific devices
 *	can override them as required
 */

static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
{
	memset((void __force *) addr, val, count);
}

static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
{
	memcpy(dst, (void __force *) src, count);
}

static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
{
	memcpy((void __force *) dst, src, count);
}

static inline uint8_t inb(unsigned long addr)
{
	return __builtin_read8((void __iomem *)addr);
}

static inline uint16_t inw(unsigned long addr)
{
	uint16_t ret = __builtin_read16((void __iomem *)addr);

	if (__is_PCI_IO(addr))
		ret = _swapw(ret);

	return ret;
}

static inline uint32_t inl(unsigned long addr)
{
	uint32_t ret = __builtin_read32((void __iomem *)addr);

	if (__is_PCI_IO(addr))
		ret = _swapl(ret);

	return ret;
}

static inline void outb(uint8_t datum, unsigned long addr)
{
	__builtin_write8((void __iomem *)addr, datum);
}

static inline void outw(uint16_t datum, unsigned long addr)
{
	if (__is_PCI_IO(addr))
		datum = _swapw(datum);
	__builtin_write16((void __iomem *)addr, datum);
}

static inline void outl(uint32_t datum, unsigned long addr)
{
	if (__is_PCI_IO(addr))
		datum = _swapl(datum);
	__builtin_write32((void __iomem *)addr, datum);
}

#define inb_p(addr)	inb(addr)
#define inw_p(addr)	inw(addr)
#define inl_p(addr)	inl(addr)
#define outb_p(x,addr)	outb(x,addr)
#define outw_p(x,addr)	outw(x,addr)
#define outl_p(x,addr)	outl(x,addr)

#define outsb(a,b,l)	io_outsb(a,b,l)
#define outsw(a,b,l)	io_outsw(a,b,l)
#define outsl(a,b,l)	__outsl(a,b,l,0)

#define insb(a,b,l)	io_insb(a,b,l)
#define insw(a,b,l)	io_insw(a,b,l)
#define insl(a,b,l)	__insl(a,b,l,0)

#define IO_SPACE_LIMIT	0xffffffff

static inline uint8_t readb(const volatile void __iomem *addr)
{
	return __builtin_read8((__force void volatile __iomem *) addr);
}

static inline uint16_t readw(const volatile void __iomem *addr)
{
	uint16_t ret =	__builtin_read16((__force void volatile __iomem *)addr);

	if (__is_PCI_MEM(addr))
		ret = _swapw(ret);
	return ret;
}

static inline uint32_t readl(const volatile void __iomem *addr)
{
	uint32_t ret =	__builtin_read32((__force void volatile __iomem *)addr);

	if (__is_PCI_MEM(addr))
		ret = _swapl(ret);

	return ret;
}

#define readb_relaxed readb
#define readw_relaxed readw
#define readl_relaxed readl

static inline void writeb(uint8_t datum, volatile void __iomem *addr)
{
	__builtin_write8(addr, datum);
	if (__is_PCI_MEM(addr))
		__flush_PCI_writes();
}

static inline void writew(uint16_t datum, volatile void __iomem *addr)
{
	if (__is_PCI_MEM(addr))
		datum = _swapw(datum);

	__builtin_write16(addr, datum);
	if (__is_PCI_MEM(addr))
		__flush_PCI_writes();
}

static inline void writel(uint32_t datum, volatile void __iomem *addr)
{
	if (__is_PCI_MEM(addr))
		datum = _swapl(datum);

	__builtin_write32(addr, datum);
	if (__is_PCI_MEM(addr))
		__flush_PCI_writes();
}


/* Values for nocacheflag and cmode */
#define IOMAP_FULL_CACHING		0
#define IOMAP_NOCACHE_SER		1
#define IOMAP_NOCACHE_NONSER		2
#define IOMAP_WRITETHROUGH		3

extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);

static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}

static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}

static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
}

static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
}

extern void iounmap(void volatile __iomem *addr);

static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
	return (void __iomem *) port;
}

static inline void ioport_unmap(void __iomem *p)
{
}

static inline void flush_write_buffers(void)
{
	__asm__ __volatile__ ("membar" : : :"memory");
}

/*
 * do appropriate I/O accesses for token type
 */
static inline unsigned int ioread8(void __iomem *p)
{
	return __builtin_read8(p);
}

static inline unsigned int ioread16(void __iomem *p)
{
	uint16_t ret = __builtin_read16(p);
	if (__is_PCI_addr(p))
		ret = _swapw(ret);
	return ret;
}

static inline unsigned int ioread32(void __iomem *p)
{
	uint32_t ret = __builtin_read32(p);
	if (__is_PCI_addr(p))
		ret = _swapl(ret);
	return ret;
}

static inline void iowrite8(u8 val, void __iomem *p)
{
	__builtin_write8(p, val);
	if (__is_PCI_MEM(p))
		__flush_PCI_writes();
}

static inline void iowrite16(u16 val, void __iomem *p)
{
	if (__is_PCI_addr(p))
		val = _swapw(val);
	__builtin_write16(p, val);
	if (__is_PCI_MEM(p))
		__flush_PCI_writes();
}

static inline void iowrite32(u32 val, void __iomem *p)
{
	if (__is_PCI_addr(p))
		val = _swapl(val);
	__builtin_write32(p, val);
	if (__is_PCI_MEM(p))
		__flush_PCI_writes();
}

static inline void ioread8_rep(void __iomem *p, void *dst, unsigned long count)
{
	io_insb((unsigned long) p, dst, count);
}

static inline void ioread16_rep(void __iomem *p, void *dst, unsigned long count)
{
	io_insw((unsigned long) p, dst, count);
}

static inline void ioread32_rep(void __iomem *p, void *dst, unsigned long count)
{
	__insl_ns((unsigned long) p, dst, count);
}

static inline void iowrite8_rep(void __iomem *p, const void *src, unsigned long count)
{
	io_outsb((unsigned long) p, src, count);
}

static inline void iowrite16_rep(void __iomem *p, const void *src, unsigned long count)
{
	io_outsw((unsigned long) p, src, count);
}

static inline void iowrite32_rep(void __iomem *p, const void *src, unsigned long count)
{
	__outsl_ns((unsigned long) p, src, count);
}

/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
{
}


/*
 * 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 /* __KERNEL__ */

#endif /* _ASM_IO_H */
Commit	Line	Data
1da177e4 LT	1	/* io.h: FRV I/O operations
	2	*
	3	* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	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.
	10	*
	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
	13	* byte swapping
	14	*/
	15	#ifndef _ASM_IO_H
	16	#define _ASM_IO_H
	17
	18	#ifdef __KERNEL__
	19
a90a72c8	20	#include <linux/types.h>
1da177e4 LT	21	#include <asm/virtconvert.h>
	22	#include <asm/string.h>
	23	#include <asm/mb-regs.h>
	24	#include <linux/delay.h>
	25
	26	/*
	27	* swap functions are sometimes needed to interface little-endian hardware
	28	*/
	29
	30	static inline unsigned short _swapw(unsigned short v)
	31	{
	32	return ((v << 8) \| (v >> 8));
	33	}
	34
	35	static inline unsigned long _swapl(unsigned long v)
	36	{
	37	return ((v << 24) \| ((v & 0xff00) << 8) \| ((v & 0xff0000) >> 8) \| (v >> 24));
	38	}
	39
	40	//#define __iormb() asm volatile("membar")
	41	//#define __iowmb() asm volatile("membar")
	42
3f4cd389 AV	43	#define __raw_readb __builtin_read8
	44	#define __raw_readw __builtin_read16
	45	#define __raw_readl __builtin_read32
1da177e4	46
3f4cd389 AV	47	#define __raw_writeb(datum, addr) __builtin_write8(addr, datum)
	48	#define __raw_writew(datum, addr) __builtin_write16(addr, datum)
	49	#define __raw_writel(datum, addr) __builtin_write32(addr, datum)
1da177e4 LT	50
	51	static inline void io_outsb(unsigned int addr, const void *buf, int len)
	52	{
	53	unsigned long __ioaddr = (unsigned long) addr;
	54	const uint8_t *bp = buf;
	55
	56	while (len--)
	57	__builtin_write8((volatile void __iomem ) __ioaddr, bp++);
	58	}
	59
	60	static inline void io_outsw(unsigned int addr, const void *buf, int len)
	61	{
	62	unsigned long __ioaddr = (unsigned long) addr;
	63	const uint16_t *bp = buf;
	64
	65	while (len--)
	66	__builtin_write16((volatile void __iomem ) __ioaddr, (bp++));
	67	}
	68
	69	extern void __outsl_ns(unsigned int addr, const void *buf, int len);
	70	extern void __outsl_sw(unsigned int addr, const void *buf, int len);
	71	static inline void __outsl(unsigned int addr, const void *buf, int len, int swap)
	72	{
	73	unsigned long __ioaddr = (unsigned long) addr;
	74
	75	if (!swap)
	76	__outsl_ns(__ioaddr, buf, len);
	77	else
	78	__outsl_sw(__ioaddr, buf, len);
	79	}
	80
	81	static inline void io_insb(unsigned long addr, void *buf, int len)
	82	{
	83	uint8_t *bp = buf;
	84
	85	while (len--)
	86	bp++ = __builtin_read8((volatile void __iomem ) addr);
	87	}
	88
	89	static inline void io_insw(unsigned long addr, void *buf, int len)
	90	{
	91	uint16_t *bp = buf;
	92
	93	while (len--)
	94	bp++ = __builtin_read16((volatile void __iomem ) addr);
	95	}
	96
	97	extern void __insl_ns(unsigned long addr, void *buf, int len);
	98	extern void __insl_sw(unsigned long addr, void *buf, int len);
	99	static inline void __insl(unsigned long addr, void *buf, int len, int swap)
	100	{
	101	if (!swap)
	102	__insl_ns(addr, buf, len);
	103	else
	104	__insl_sw(addr, buf, len);
	105	}
	106
a90a72c8 DH	107	#define mmiowb() mb()
a90a72c8 DH	108
1da177e4 LT	109	/*
	110	* make the short names macros so specific devices
	111	* can override them as required
	112	*/
	113
	114	static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
	115	{
	116	memset((void __force *) addr, val, count);
	117	}
	118
5e591a55	119	static inline void memcpy_fromio(void dst, const volatile void __iomem src, int count)
1da177e4 LT	120	{
	121	memcpy(dst, (void __force *) src, count);
	122	}
	123
	124	static inline void memcpy_toio(volatile void __iomem dst, const void src, int count)
	125	{
	126	memcpy((void __force *) dst, src, count);
	127	}
	128
	129	static inline uint8_t inb(unsigned long addr)
	130	{
3f4cd389	131	return __builtin_read8((void __iomem *)addr);
1da177e4 LT	132	}
	133
	134	static inline uint16_t inw(unsigned long addr)
	135	{
3f4cd389	136	uint16_t ret = __builtin_read16((void __iomem *)addr);
1da177e4 LT	137
	138	if (__is_PCI_IO(addr))
	139	ret = _swapw(ret);
	140
	141	return ret;
	142	}
	143
	144	static inline uint32_t inl(unsigned long addr)
	145	{
3f4cd389	146	uint32_t ret = __builtin_read32((void __iomem *)addr);
1da177e4 LT	147
	148	if (__is_PCI_IO(addr))
	149	ret = _swapl(ret);
	150
	151	return ret;
	152	}
	153
	154	static inline void outb(uint8_t datum, unsigned long addr)
	155	{
3f4cd389	156	__builtin_write8((void __iomem *)addr, datum);
1da177e4 LT	157	}
	158
	159	static inline void outw(uint16_t datum, unsigned long addr)
	160	{
	161	if (__is_PCI_IO(addr))
	162	datum = _swapw(datum);
3f4cd389	163	__builtin_write16((void __iomem *)addr, datum);
1da177e4 LT	164	}
	165
	166	static inline void outl(uint32_t datum, unsigned long addr)
	167	{
	168	if (__is_PCI_IO(addr))
	169	datum = _swapl(datum);
3f4cd389	170	__builtin_write32((void __iomem *)addr, datum);
1da177e4 LT	171	}
	172
	173	#define inb_p(addr) inb(addr)
	174	#define inw_p(addr) inw(addr)
	175	#define inl_p(addr) inl(addr)
	176	#define outb_p(x,addr) outb(x,addr)
	177	#define outw_p(x,addr) outw(x,addr)
	178	#define outl_p(x,addr) outl(x,addr)
	179
	180	#define outsb(a,b,l) io_outsb(a,b,l)
	181	#define outsw(a,b,l) io_outsw(a,b,l)
	182	#define outsl(a,b,l) __outsl(a,b,l,0)
	183
	184	#define insb(a,b,l) io_insb(a,b,l)
	185	#define insw(a,b,l) io_insw(a,b,l)
	186	#define insl(a,b,l) __insl(a,b,l,0)
	187
	188	#define IO_SPACE_LIMIT 0xffffffff
	189
	190	static inline uint8_t readb(const volatile void __iomem *addr)
	191	{
3f4cd389	192	return __builtin_read8((__force void volatile __iomem *) addr);
1da177e4 LT	193	}
	194
	195	static inline uint16_t readw(const volatile void __iomem *addr)
	196	{
3f4cd389	197	uint16_t ret = __builtin_read16((__force void volatile __iomem *)addr);
1da177e4 LT	198
	199	if (__is_PCI_MEM(addr))
	200	ret = _swapw(ret);
	201	return ret;
	202	}
	203
	204	static inline uint32_t readl(const volatile void __iomem *addr)
	205	{
3f4cd389	206	uint32_t ret = __builtin_read32((__force void volatile __iomem *)addr);
1da177e4 LT	207
	208	if (__is_PCI_MEM(addr))
	209	ret = _swapl(ret);
	210
	211	return ret;
	212	}
	213
a90a72c8 DH	214	#define readb_relaxed readb
	215	#define readw_relaxed readw
	216	#define readl_relaxed readl
	217
1da177e4 LT	218	static inline void writeb(uint8_t datum, volatile void __iomem *addr)
1da177e4 LT	219	{
3f4cd389	220	__builtin_write8(addr, datum);
1da177e4 LT	221	if (__is_PCI_MEM(addr))
	222	__flush_PCI_writes();
	223	}
	224
	225	static inline void writew(uint16_t datum, volatile void __iomem *addr)
	226	{
	227	if (__is_PCI_MEM(addr))
	228	datum = _swapw(datum);
	229
3f4cd389	230	__builtin_write16(addr, datum);
1da177e4 LT	231	if (__is_PCI_MEM(addr))
	232	__flush_PCI_writes();
	233	}
	234
	235	static inline void writel(uint32_t datum, volatile void __iomem *addr)
	236	{
	237	if (__is_PCI_MEM(addr))
	238	datum = _swapl(datum);
	239
3f4cd389	240	__builtin_write32(addr, datum);
1da177e4 LT	241	if (__is_PCI_MEM(addr))
	242	__flush_PCI_writes();
	243	}
	244
	245
	246	/* Values for nocacheflag and cmode */
	247	#define IOMAP_FULL_CACHING 0
	248	#define IOMAP_NOCACHE_SER 1
	249	#define IOMAP_NOCACHE_NONSER 2
	250	#define IOMAP_WRITETHROUGH 3
	251
	252	extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
1da177e4 LT	253
	254	static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
	255	{
	256	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
	257	}
	258
	259	static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size)
	260	{
	261	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
	262	}
	263
	264	static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size)
	265	{
	266	return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
	267	}
	268
	269	static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size)
	270	{
	271	return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
	272	}
	273
3f4cd389	274	extern void iounmap(void volatile __iomem *addr);
1da177e4	275
a90a72c8 DH	276	static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
	277	{
	278	return (void __iomem *) port;
	279	}
	280
	281	static inline void ioport_unmap(void __iomem *p)
	282	{
	283	}
	284
1da177e4 LT	285	static inline void flush_write_buffers(void)
	286	{
	287	__asm__ __volatile__ ("membar" : : :"memory");
	288	}
	289
a90a72c8 DH	290	/*
	291	* do appropriate I/O accesses for token type
	292	*/
	293	static inline unsigned int ioread8(void __iomem *p)
	294	{
	295	return __builtin_read8(p);
	296	}
	297
	298	static inline unsigned int ioread16(void __iomem *p)
	299	{
	300	uint16_t ret = __builtin_read16(p);
	301	if (__is_PCI_addr(p))
	302	ret = _swapw(ret);
	303	return ret;
	304	}
	305
	306	static inline unsigned int ioread32(void __iomem *p)
	307	{
	308	uint32_t ret = __builtin_read32(p);
	309	if (__is_PCI_addr(p))
	310	ret = _swapl(ret);
	311	return ret;
	312	}
	313
	314	static inline void iowrite8(u8 val, void __iomem *p)
	315	{
	316	__builtin_write8(p, val);
	317	if (__is_PCI_MEM(p))
	318	__flush_PCI_writes();
	319	}
	320
	321	static inline void iowrite16(u16 val, void __iomem *p)
	322	{
	323	if (__is_PCI_addr(p))
	324	val = _swapw(val);
	325	__builtin_write16(p, val);
	326	if (__is_PCI_MEM(p))
	327	__flush_PCI_writes();
	328	}
	329
	330	static inline void iowrite32(u32 val, void __iomem *p)
	331	{
	332	if (__is_PCI_addr(p))
	333	val = _swapl(val);
	334	__builtin_write32(p, val);
	335	if (__is_PCI_MEM(p))
	336	__flush_PCI_writes();
	337	}
	338
	339	static inline void ioread8_rep(void __iomem p, void dst, unsigned long count)
	340	{
	341	io_insb((unsigned long) p, dst, count);
	342	}
	343
	344	static inline void ioread16_rep(void __iomem p, void dst, unsigned long count)
	345	{
	346	io_insw((unsigned long) p, dst, count);
	347	}
	348
	349	static inline void ioread32_rep(void __iomem p, void dst, unsigned long count)
	350	{
	351	__insl_ns((unsigned long) p, dst, count);
	352	}
	353
354	static inline void iowrite8_rep(void __iomem p, const void src, unsigned long count)
355	{
356	io_outsb((unsigned long) p, src, count);
357	}
358
359	static inline void iowrite16_rep(void __iomem p, const void src, unsigned long count)
360	{
361	io_outsw((unsigned long) p, src, count);
362	}
363
364	static inline void iowrite32_rep(void __iomem p, const void src, unsigned long count)
365	{
366	__outsl_ns((unsigned long) p, src, count);
367	}
368
369	/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
370	struct pci_dev;
371	extern void __iomem pci_iomap(struct pci_dev dev, int bar, unsigned long max);
372	static inline void pci_iounmap(struct pci_dev dev, void __iomem p)
373	{
374	}
375
1da177e4 LT	376
	377	/*
	378	* Convert a physical pointer to a virtual kernel pointer for /dev/mem
	379	* access
	380	*/
	381	#define xlate_dev_mem_ptr(p) __va(p)
	382
	383	/*
	384	* Convert a virtual cached pointer to an uncached pointer
	385	*/
	386	#define xlate_dev_kmem_ptr(p) p
	387
	388	#endif /* __KERNEL__ */
	389
	390	#endif /* _ASM_IO_H */