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/*
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* (C) Copyright IBM Corporation 2004
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file mmio.h
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* Functions for properly handling memory mapped IO on various platforms.
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*
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* \author Ian Romanick <idr@us.ibm.com>
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*/
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#ifndef MMIO_H
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#define MMIO_H
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#include "main/glheader.h"
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#if defined( __powerpc__ )
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static INLINE uint32_t
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read_MMIO_LE32( volatile void * base, unsigned long offset )
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{
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uint32_t val;
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__asm__ __volatile__( "lwbrx %0, %1, %2 ; eieio"
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: "=r" (val)
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: "b" (base), "r" (offset) );
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return val;
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}
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#else
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static INLINE uint32_t
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read_MMIO_LE32( volatile void * base, unsigned long offset )
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{
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volatile uint32_t * p = (volatile uint32_t *) (((volatile char *) base) + offset);
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return LE32_TO_CPU( p[0] );
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}
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#endif
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#endif /* MMIO_H */
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