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/*
* (C) Copyright IBM Corporation 2004
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file mmio.h
* Functions for properly handling memory mapped IO on various platforms.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#ifndef MMIO_H
#define MMIO_H
#if defined( __powerpc__ )
static __inline__ u_int32_t
read_MMIO_LE32( volatile void * base, unsigned long offset )
{
volatile void * p = ((volatile char *) base) + offset;
u_int32_t val;
__asm__ __volatile__( "lwbrx %0, %1, %2 ; eieio"
: "=r" (val)
: "b" (base), "r" (offset), "m" (p) );
return val;
}
#else
static __inline__ u_int32_t
read_MMIO_LE32( volatile void * base, unsigned long offset )
{
volatile u_int32_t * p = (volatile u_int32_t *) (((volatile char *) base) + offset);
return LE32_TO_CPU( p[0] );
}
#endif
#endif /* MMIO_H */
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