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 struct device; 26 27 void __iowrite32_copy(void __iomem *to, const void *from, size_t count); 28 void __iowrite64_copy(void __iomem *to, const void *from, size_t count); 29 30 int ioremap_page_range(unsigned long addr, unsigned long end, 31 unsigned long phys_addr, pgprot_t prot); 32 33 /* 34 * Managed iomap interface 35 */ 36 #ifdef CONFIG_HAS_IOPORT 37 void __iomem * devm_ioport_map(struct device *dev, unsigned long port, 38 unsigned int nr); 39 void devm_ioport_unmap(struct device *dev, void __iomem *addr); 40 #else 41 static inline void __iomem *devm_ioport_map(struct device *dev, 42 unsigned long port, 43 unsigned int nr) 44 { 45 return NULL; 46 } 47 48 static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) 49 { 50 } 51 #endif 52 53 void __iomem * devm_ioremap(struct device *dev, unsigned long offset, 54 unsigned long size); 55 void __iomem * devm_ioremap_nocache(struct device *dev, unsigned long offset, 56 unsigned long size); 57 void devm_iounmap(struct device *dev, void __iomem *addr); 58 59 /** 60 * check_signature - find BIOS signatures 61 * @io_addr: mmio address to check 62 * @signature: signature block 63 * @length: length of signature 64 * 65 * Perform a signature comparison with the mmio address io_addr. This 66 * address should have been obtained by ioremap. 67 * Returns 1 on a match. 68 */ 69 70 static inline int check_signature(const volatile void __iomem *io_addr, 71 const unsigned char *signature, int length) 72 { 73 int retval = 0; 74 do { 75 if (readb(io_addr) != *signature) 76 goto out; 77 io_addr++; 78 signature++; 79 length--; 80 } while (length); 81 retval = 1; 82 out: 83 return retval; 84 } 85 86 #endif /* _LINUX_IO_H */ 87