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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2000-2003 Silicon Graphics, Inc. All rights reserved.
*/
#ifndef _ASM_SN_SN2_IO_H
#define _ASM_SN_SN2_IO_H
extern void * sn_io_addr(unsigned long port); /* Forward definition */
extern void sn_mmiob(void); /* Forward definition */
#define __sn_mf_a() __asm__ __volatile__ ("mf.a" ::: "memory")
extern void sn_dma_flush(unsigned long);
/*
* The following routines are SN Platform specific, called when
* a reference is made to inX/outX set macros. SN Platform
* inX set of macros ensures that Posted DMA writes on the
* Bridge is flushed.
*
* The routines should be self explainatory.
*/
static inline unsigned int
__sn_inb (unsigned long port)
{
volatile unsigned char *addr = sn_io_addr(port);
unsigned char ret;
ret = *addr;
sn_dma_flush((unsigned long)addr);
__sn_mf_a();
return ret;
}
static inline unsigned int
__sn_inw (unsigned long port)
{
volatile unsigned short *addr = sn_io_addr(port);
unsigned short ret;
ret = *addr;
sn_dma_flush((unsigned long)addr);
__sn_mf_a();
return ret;
}
static inline unsigned int
__sn_inl (unsigned long port)
{
volatile unsigned int *addr = sn_io_addr(port);
unsigned int ret;
ret = *addr;
sn_dma_flush((unsigned long)addr);
__sn_mf_a();
return ret;
}
static inline void
__sn_outb (unsigned char val, unsigned long port)
{
volatile unsigned char *addr = sn_io_addr(port);
*addr = val;
sn_mmiob();
}
static inline void
__sn_outw (unsigned short val, unsigned long port)
{
volatile unsigned short *addr = sn_io_addr(port);
*addr = val;
sn_mmiob();
}
static inline void
__sn_outl (unsigned int val, unsigned long port)
{
volatile unsigned int *addr = sn_io_addr(port);
*addr = val;
sn_mmiob();
}
/*
* The following routines are SN Platform specific, called when
* a reference is made to readX/writeX set macros. SN Platform
* readX set of macros ensures that Posted DMA writes on the
* Bridge is flushed.
*
* The routines should be self explainatory.
*/
static inline unsigned char
__sn_readb (void *addr)
{
unsigned char val;
val = *(volatile unsigned char *)addr;
sn_dma_flush((unsigned long)addr);
return val;
}
static inline unsigned short
__sn_readw (void *addr)
{
unsigned short val;
val = *(volatile unsigned short *)addr;
sn_dma_flush((unsigned long)addr);
return val;
}
static inline unsigned int
__sn_readl (void *addr)
{
unsigned int val;
val = *(volatile unsigned int *) addr;
sn_dma_flush((unsigned long)addr);
return val;
}
static inline unsigned long
__sn_readq (void *addr)
{
unsigned long val;
val = *(volatile unsigned long *) addr;
sn_dma_flush((unsigned long)addr);
return val;
}
/*
* For generic and SN2 kernels, we have a set of fast access
* PIO macros. These macros are provided on SN Platform
* because the normal inX and readX macros perform an
* additional task of flushing Post DMA request on the Bridge.
*
* These routines should be self explainatory.
*/
static inline unsigned int
sn_inb_fast (unsigned long port)
{
volatile unsigned char *addr = (unsigned char *)port;
unsigned char ret;
ret = *addr;
__sn_mf_a();
return ret;
}
static inline unsigned int
sn_inw_fast (unsigned long port)
{
volatile unsigned short *addr = (unsigned short *)port;
unsigned short ret;
ret = *addr;
__sn_mf_a();
return ret;
}
static inline unsigned int
sn_inl_fast (unsigned long port)
{
volatile unsigned int *addr = (unsigned int *)port;
unsigned int ret;
ret = *addr;
__sn_mf_a();
return ret;
}
static inline unsigned char
sn_readb_fast (void *addr)
{
return *(volatile unsigned char *)addr;
}
static inline unsigned short
sn_readw_fast (void *addr)
{
return *(volatile unsigned short *)addr;
}
static inline unsigned int
sn_readl_fast (void *addr)
{
return *(volatile unsigned int *) addr;
}
static inline unsigned long
sn_readq_fast (void *addr)
{
return *(volatile unsigned long *) addr;
}
#endif
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