1*c27a0d75SBryan O'Sullivan /* 2*c27a0d75SBryan O'Sullivan * Copyright 2006 PathScale, Inc. All Rights Reserved. 3*c27a0d75SBryan O'Sullivan * 4*c27a0d75SBryan O'Sullivan * This file is free software; you can redistribute it and/or modify 5*c27a0d75SBryan O'Sullivan * it under the terms of version 2 of the GNU General Public License 6*c27a0d75SBryan O'Sullivan * as published by the Free Software Foundation. 7*c27a0d75SBryan O'Sullivan * 8*c27a0d75SBryan O'Sullivan * This program is distributed in the hope that it will be useful, 9*c27a0d75SBryan O'Sullivan * but WITHOUT ANY WARRANTY; without even the implied warranty of 10*c27a0d75SBryan O'Sullivan * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11*c27a0d75SBryan O'Sullivan * GNU General Public License for more details. 12*c27a0d75SBryan O'Sullivan * 13*c27a0d75SBryan O'Sullivan * You should have received a copy of the GNU General Public License 14*c27a0d75SBryan O'Sullivan * along with this program; if not, write to the Free Software Foundation, 15*c27a0d75SBryan O'Sullivan * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. 16*c27a0d75SBryan O'Sullivan */ 17*c27a0d75SBryan O'Sullivan 18*c27a0d75SBryan O'Sullivan #include <linux/io.h> 19*c27a0d75SBryan O'Sullivan #include <linux/module.h> 20*c27a0d75SBryan O'Sullivan 21*c27a0d75SBryan O'Sullivan /** 22*c27a0d75SBryan O'Sullivan * __iowrite32_copy - copy data to MMIO space, in 32-bit units 23*c27a0d75SBryan O'Sullivan * @to: destination, in MMIO space (must be 32-bit aligned) 24*c27a0d75SBryan O'Sullivan * @from: source (must be 32-bit aligned) 25*c27a0d75SBryan O'Sullivan * @count: number of 32-bit quantities to copy 26*c27a0d75SBryan O'Sullivan * 27*c27a0d75SBryan O'Sullivan * Copy data from kernel space to MMIO space, in units of 32 bits at a 28*c27a0d75SBryan O'Sullivan * time. Order of access is not guaranteed, nor is a memory barrier 29*c27a0d75SBryan O'Sullivan * performed afterwards. 30*c27a0d75SBryan O'Sullivan */ 31*c27a0d75SBryan O'Sullivan void __attribute__((weak)) __iowrite32_copy(void __iomem *to, 32*c27a0d75SBryan O'Sullivan const void *from, 33*c27a0d75SBryan O'Sullivan size_t count) 34*c27a0d75SBryan O'Sullivan { 35*c27a0d75SBryan O'Sullivan u32 __iomem *dst = to; 36*c27a0d75SBryan O'Sullivan const u32 *src = from; 37*c27a0d75SBryan O'Sullivan const u32 *end = src + count; 38*c27a0d75SBryan O'Sullivan 39*c27a0d75SBryan O'Sullivan while (src < end) 40*c27a0d75SBryan O'Sullivan __raw_writel(*src++, dst++); 41*c27a0d75SBryan O'Sullivan } 42*c27a0d75SBryan O'Sullivan EXPORT_SYMBOL_GPL(__iowrite32_copy); 43