/* * This file is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <linux/export.h> #include <linux/io.h> /** * __ioread64_copy - copy data from MMIO space, in 64-bit units * @to: destination (must be 64-bit aligned) * @from: source, in MMIO space (must be 64-bit aligned) * @count: number of 64-bit quantities to copy * * Copy data from MMIO space to kernel space, in units of 32 or 64 bits at a * time. Order of access is not guaranteed, nor is a memory barrier * performed afterwards. */ void __ioread64_copy(void *to, const void __iomem *from, size_t count) { #ifdef CONFIG_64BIT u64 *dst = to; const u64 __iomem *src = from; const u64 __iomem *end = src + count; while (src < end) *dst++ = __raw_readq(src++); #else __ioread32_copy(to, from, count * 2); #endif } EXPORT_SYMBOL_GPL(__ioread64_copy);