1c27a0d75SBryan O'Sullivan /* 2c27a0d75SBryan O'Sullivan * Copyright 2006 PathScale, Inc. All Rights Reserved. 3c27a0d75SBryan O'Sullivan * 4c27a0d75SBryan O'Sullivan * This file is free software; you can redistribute it and/or modify 5c27a0d75SBryan O'Sullivan * it under the terms of version 2 of the GNU General Public License 6c27a0d75SBryan O'Sullivan * as published by the Free Software Foundation. 7c27a0d75SBryan O'Sullivan * 8c27a0d75SBryan O'Sullivan * This program is distributed in the hope that it will be useful, 9c27a0d75SBryan O'Sullivan * but WITHOUT ANY WARRANTY; without even the implied warranty of 10c27a0d75SBryan O'Sullivan * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11c27a0d75SBryan O'Sullivan * GNU General Public License for more details. 12c27a0d75SBryan O'Sullivan * 13c27a0d75SBryan O'Sullivan * You should have received a copy of the GNU General Public License 14c27a0d75SBryan O'Sullivan * along with this program; if not, write to the Free Software Foundation, 15c27a0d75SBryan O'Sullivan * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. 16c27a0d75SBryan O'Sullivan */ 17c27a0d75SBryan O'Sullivan 18c27a0d75SBryan O'Sullivan #include <linux/module.h> 19ad6b97fcSAl Viro #include <linux/io.h> 20c27a0d75SBryan O'Sullivan 21c27a0d75SBryan O'Sullivan /** 22c27a0d75SBryan O'Sullivan * __iowrite32_copy - copy data to MMIO space, in 32-bit units 23c27a0d75SBryan O'Sullivan * @to: destination, in MMIO space (must be 32-bit aligned) 24c27a0d75SBryan O'Sullivan * @from: source (must be 32-bit aligned) 25c27a0d75SBryan O'Sullivan * @count: number of 32-bit quantities to copy 26c27a0d75SBryan O'Sullivan * 27c27a0d75SBryan O'Sullivan * Copy data from kernel space to MMIO space, in units of 32 bits at a 28c27a0d75SBryan O'Sullivan * time. Order of access is not guaranteed, nor is a memory barrier 29c27a0d75SBryan O'Sullivan * performed afterwards. 30c27a0d75SBryan O'Sullivan */ 31c27a0d75SBryan O'Sullivan void __attribute__((weak)) __iowrite32_copy(void __iomem *to, 32c27a0d75SBryan O'Sullivan const void *from, 33c27a0d75SBryan O'Sullivan size_t count) 34c27a0d75SBryan O'Sullivan { 35c27a0d75SBryan O'Sullivan u32 __iomem *dst = to; 36c27a0d75SBryan O'Sullivan const u32 *src = from; 37c27a0d75SBryan O'Sullivan const u32 *end = src + count; 38c27a0d75SBryan O'Sullivan 39c27a0d75SBryan O'Sullivan while (src < end) 40c27a0d75SBryan O'Sullivan __raw_writel(*src++, dst++); 41c27a0d75SBryan O'Sullivan } 42c27a0d75SBryan O'Sullivan EXPORT_SYMBOL_GPL(__iowrite32_copy); 43*22ae813bSBrice Goglin 44*22ae813bSBrice Goglin /** 45*22ae813bSBrice Goglin * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units 46*22ae813bSBrice Goglin * @to: destination, in MMIO space (must be 64-bit aligned) 47*22ae813bSBrice Goglin * @from: source (must be 64-bit aligned) 48*22ae813bSBrice Goglin * @count: number of 64-bit quantities to copy 49*22ae813bSBrice Goglin * 50*22ae813bSBrice Goglin * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a 51*22ae813bSBrice Goglin * time. Order of access is not guaranteed, nor is a memory barrier 52*22ae813bSBrice Goglin * performed afterwards. 53*22ae813bSBrice Goglin */ 54*22ae813bSBrice Goglin void __attribute__((weak)) __iowrite64_copy(void __iomem *to, 55*22ae813bSBrice Goglin const void *from, 56*22ae813bSBrice Goglin size_t count) 57*22ae813bSBrice Goglin { 58*22ae813bSBrice Goglin #ifdef CONFIG_64BIT 59*22ae813bSBrice Goglin u64 __iomem *dst = to; 60*22ae813bSBrice Goglin const u64 *src = from; 61*22ae813bSBrice Goglin const u64 *end = src + count; 62*22ae813bSBrice Goglin 63*22ae813bSBrice Goglin while (src < end) 64*22ae813bSBrice Goglin __raw_writeq(*src++, dst++); 65*22ae813bSBrice Goglin #else 66*22ae813bSBrice Goglin __iowrite32_copy(to, from, count * 2); 67*22ae813bSBrice Goglin #endif 68*22ae813bSBrice Goglin } 69*22ae813bSBrice Goglin 70*22ae813bSBrice Goglin EXPORT_SYMBOL_GPL(__iowrite64_copy); 71