1 /* 2 * Copyright 2006 PathScale, Inc. All Rights Reserved. 3 * 4 * This file is free software; you can redistribute it and/or modify 5 * it under the terms of version 2 of the GNU General Public License 6 * as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. 16 */ 17 18 #ifndef _LINUX_IO_H 19 #define _LINUX_IO_H 20 21 #include <linux/types.h> 22 #include <asm/io.h> 23 #include <asm/page.h> 24 25 void __iowrite32_copy(void __iomem *to, const void *from, size_t count); 26 void __iowrite64_copy(void __iomem *to, const void *from, size_t count); 27 28 int ioremap_page_range(unsigned long addr, unsigned long end, 29 unsigned long phys_addr, pgprot_t prot); 30 31 /** 32 * check_signature - find BIOS signatures 33 * @io_addr: mmio address to check 34 * @signature: signature block 35 * @length: length of signature 36 * 37 * Perform a signature comparison with the mmio address io_addr. This 38 * address should have been obtained by ioremap. 39 * Returns 1 on a match. 40 */ 41 42 static inline int check_signature(const volatile void __iomem *io_addr, 43 const unsigned char *signature, int length) 44 { 45 int retval = 0; 46 do { 47 if (readb(io_addr) != *signature) 48 goto out; 49 io_addr++; 50 signature++; 51 length--; 52 } while (length); 53 retval = 1; 54 out: 55 return retval; 56 } 57 58 #endif /* _LINUX_IO_H */ 59