ide.h

linux 内核源代码

/* ide.h: SPARC PCI specific IDE glue.
 *
 * Copyright (C) 1997  David S. Miller ([e-mail])
 * Copyright (C) 1998  Eddie C. Dost   ([e-mail])
 * Adaptation from sparc64 version to sparc by Pete Zaitcev.
 */

#ifndef _SPARC_IDE_H
#define _SPARC_IDE_H

#ifdef __KERNEL__

#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/psr.h>

#undef  MAX_HWIFS
#define MAX_HWIFS	2

#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 sparc, 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 void __ide_insw(unsigned long port,
				  void *dst,
				  unsigned long count)
{
	volatile unsigned short *data_port;
	/* unsigned long end = (unsigned long)dst + (count << 1); */ /* P3 */
	u16 *ps = dst;
	u32 *pi;

	data_port = (volatile unsigned short *)port;

	if(((unsigned long)ps) & 0x2) {
		*ps++ = *data_port;
		count--;
	}
	pi = (u32 *)ps;
	while(count >= 2) {
		u32 w;

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

	/* __flush_dcache_range((unsigned long)dst, end); */ /* P3 see hme */
}

static inline void __ide_outsw(unsigned long port,
				   const void *src,
				   unsigned long count)
{
	volatile unsigned short *data_port;
	/* unsigned long end = (unsigned long)src + (count << 1); */
	const u16 *ps = src;
	const u32 *pi;

	data_port = (volatile unsigned short *)port;

	if(((unsigned long)src) & 0x2) {
		*data_port = *ps++;
		count--;
	}
	pi = (const u32 *)ps;
	while(count >= 2) {
		u32 w;

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

	/* __flush_dcache_range((unsigned long)src, end); */ /* P3 see hme */
}

#endif /* __KERNEL__ */

#endif /* _SPARC_IDE_H */