18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/*
28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * (C) Copyright IBM Corporation 2004
38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * All Rights Reserved.
48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *
58d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Permission is hereby granted, free of charge, to any person obtaining a
68d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * copy of this software and associated documentation files (the "Software"),
78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * to deal in the Software without restriction, including without limitation
88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * on the rights to use, copy, modify, merge, publish, distribute, sub
98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * license, and/or sell copies of the Software, and to permit persons to whom
108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * the Software is furnished to do so, subject to the following conditions:
118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *
128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * The above copyright notice and this permission notice (including the next
138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * paragraph) shall be included in all copies or substantial portions of the
148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Software.
158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *
168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * USE OR OTHER DEALINGS IN THE SOFTWARE.
238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */
248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt
258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/**
268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * \file mmio.h
278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Functions for properly handling memory mapped IO on various platforms.
288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *
298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * \author Ian Romanick <idr@us.ibm.com>
308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */
318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt
328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt
338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef MMIO_H
348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define MMIO_H
358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt
368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "main/glheader.h"
378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt
388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#if defined( __powerpc__ )
398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt
408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic INLINE uint32_t
41read_MMIO_LE32( volatile void * base, unsigned long offset )
42{
43   uint32_t val;
44
45   __asm__ __volatile__( "lwbrx	%0, %1, %2 ; eieio"
46			 : "=r" (val)
47			 : "b" (base), "r" (offset) );
48   return val;
49}
50
51#else
52
53static INLINE uint32_t
54read_MMIO_LE32( volatile void * base, unsigned long offset )
55{
56   volatile uint32_t * p = (volatile uint32_t *) (((volatile char *) base) + offset);
57   return LE32_TO_CPU( p[0] );
58}
59
60#endif
61
62#endif /* MMIO_H */
63