/* * Based on arch/arm/kernel/io.c * * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 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, see <http://www.gnu.org/licenses/>. */ #include <linux/export.h> #include <linux/types.h> #include <linux/io.h> /* * Copy data from IO memory space to "real" memory space. */ void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count) { unsigned char *t = to; while (count) { count--; *t = readb(from); t++; from++; } } EXPORT_SYMBOL(__memcpy_fromio); /* * Copy data from "real" memory space to IO memory space. */ void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count) { const unsigned char *f = from; while (count) { count--; writeb(*f, to); f++; to++; } } EXPORT_SYMBOL(__memcpy_toio); /* * "memset" on IO memory space. */ void __memset_io(volatile void __iomem *dst, int c, size_t count) { while (count) { count--; writeb(c, dst); dst++; } } EXPORT_SYMBOL(__memset_io);