1 /* 2 * (C) Copyright IBM Corporation 2004 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * on the rights to use, copy, modify, merge, publish, distribute, sub 9 * license, and/or sell copies of the Software, and to permit persons to whom 10 * the Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 19 * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 22 * USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 /** 26 * \file mmio.h 27 * Functions for properly handling memory mapped IO on various platforms. 28 * 29 * \author Ian Romanick <idr (at) us.ibm.com> 30 */ 31 32 33 #ifndef MMIO_H 34 #define MMIO_H 35 36 #include "main/glheader.h" 37 38 #if defined( __powerpc__ ) 39 40 static INLINE uint32_t 41 read_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 53 static INLINE uint32_t 54 read_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
