ide.h

linux 内核源代码

/* $Id: ide.h,v 1.21 2001/09/25 20:21:48 kanoj Exp $
 * ide.h: Ultra/PCI specific IDE glue.
 *
 * Copyright (C) 1997  David S. Miller ([e-mail])
 * Copyright (C) 1998  Eddie C. Dost   ([e-mail])
 */

#ifndef _SPARC64_IDE_H
#define _SPARC64_IDE_H

#ifdef __KERNEL__

#include <asm/pgalloc.h>
#include <asm/io.h>
#include <asm/spitfire.h>
#include <asm/cacheflush.h>
#include <asm/page.h>

#ifndef MAX_HWIFS
# ifdef CONFIG_BLK_DEV_IDEPCI
#define MAX_HWIFS	10
# else
#define MAX_HWIFS	2
# endif
#endif

#define ide_default_io_ctl(base)	((base) + 0x206) /* obsolete */

#define __ide_insl(data_reg, buffer, wcount) \
	__ide_insw(data_reg, buffer, (wcount)<<1)
#define __ide_outsl(data_reg, buffer, wcount) \
	__ide_outsw(data_reg, buffer, (wcount)<<1)

/* On sparc64, I/O ports and MMIO registers are accessed identically.  */
#define __ide_mm_insw	__ide_insw
#define __ide_mm_insl	__ide_insl
#define __ide_mm_outsw	__ide_outsw
#define __ide_mm_outsl	__ide_outsl

static inline unsigned int inw_be(void __iomem *addr)
{
	unsigned int ret;

	__asm__ __volatile__("lduha [%1] %2, %0"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline void __ide_insw(void __iomem *port, void *dst, u32 count)
{
#ifdef DCACHE_ALIASING_POSSIBLE
	unsigned long end = (unsigned long)dst + (count << 1);
#endif
	u16 *ps = dst;
	u32 *pi;

	if(((u64)ps) & 0x2) {
		*ps++ = inw_be(port);
		count--;
	}
	pi = (u32 *)ps;
	while(count >= 2) {
		u32 w;

		w  = inw_be(port) << 16;
		w |= inw_be(port);
		*pi++ = w;
		count -= 2;
	}
	ps = (u16 *)pi;
	if(count)
		*ps++ = inw_be(port);

#ifdef DCACHE_ALIASING_POSSIBLE
	__flush_dcache_range((unsigned long)dst, end);
#endif
}

static inline void outw_be(unsigned short w, void __iomem *addr)
{
	__asm__ __volatile__("stha %0, [%1] %2"
			     : /* no outputs */
			     : "r" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static inline void __ide_outsw(void __iomem *port, void *src, u32 count)
{
#ifdef DCACHE_ALIASING_POSSIBLE
	unsigned long end = (unsigned long)src + (count << 1);
#endif
	const u16 *ps = src;
	const u32 *pi;

	if(((u64)src) & 0x2) {
		outw_be(*ps++, port);
		count--;
	}
	pi = (const u32 *)ps;
	while(count >= 2) {
		u32 w;

		w = *pi++;
		outw_be((w >> 16), port);
		outw_be(w, port);
		count -= 2;
	}
	ps = (const u16 *)pi;
	if(count)
		outw_be(*ps, port);

#ifdef DCACHE_ALIASING_POSSIBLE
	__flush_dcache_range((unsigned long)src, end);
#endif
}

#endif /* __KERNEL__ */

#endif /* _SPARC64_IDE_H */