From 95ba3524970f9f63aa518d6c3dd4e702c4941861 Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Tue, 26 Oct 2004 19:20:40 +0000 Subject: As per suggestions my Michel Daenzer, improve the fix for bugzilla #1513. --- src/mesa/drivers/dri/common/mmio.h | 63 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/mesa/drivers/dri/common/mmio.h (limited to 'src/mesa/drivers/dri/common') diff --git a/src/mesa/drivers/dri/common/mmio.h b/src/mesa/drivers/dri/common/mmio.h new file mode 100644 index 0000000000..1418543dc5 --- /dev/null +++ b/src/mesa/drivers/dri/common/mmio.h @@ -0,0 +1,63 @@ +/* + * (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 + */ + + +#ifndef MMIO_H +#define MMIO_H + +#include + +#if defined( __powerpc__ ) + +static __inline__ uint32_t +read_MMIO_LE32( volatile void * base, unsigned long offset ) +{ + volatile void * p = ((volatile char *) base) + offset; + uint32_t val; + + __asm__ __volatile__( "lwbrx %0, %1, %2 ; eieio" + : "=r" (val) + : "b" (base), "r" (offset), "m" (p) ); + return val; +} + +#else + +static __inline__ uint32_t +read_MMIO_LE32( volatile void * base, unsigned long offset ) +{ + volatile uint32_t * p = (volatile uint32_t *) (((volatile char *) base) + offset); + return LE32_TO_CPU( p[0] ); +} + +#endif + +#endif /* MMIO_H */ -- cgit v1.2.3