1 /* 2 * include/asm-xtensa/io.h 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 2001 - 2005 Tensilica Inc. 9 */ 10 11 #ifndef _XTENSA_IO_H 12 #define _XTENSA_IO_H 13 14 #ifdef __KERNEL__ 15 #include <asm/byteorder.h> 16 #include <asm/page.h> 17 #include <asm/vectors.h> 18 #include <linux/bug.h> 19 #include <linux/kernel.h> 20 21 #include <linux/types.h> 22 23 #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x)) 24 #define IO_SPACE_LIMIT ~0 25 26 #ifdef CONFIG_MMU 27 28 /* 29 * Return the virtual address for the specified bus memory. 30 * Note that we currently don't support any address outside the KIO segment. 31 */ 32 static inline void __iomem *ioremap_nocache(unsigned long offset, 33 unsigned long size) 34 { 35 if (offset >= XCHAL_KIO_PADDR 36 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) 37 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); 38 else 39 BUG(); 40 } 41 42 static inline void __iomem *ioremap_cache(unsigned long offset, 43 unsigned long size) 44 { 45 if (offset >= XCHAL_KIO_PADDR 46 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) 47 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); 48 else 49 BUG(); 50 } 51 #define ioremap_cache ioremap_cache 52 53 #define ioremap_wc ioremap_nocache 54 #define ioremap_wt ioremap_nocache 55 56 static inline void __iomem *ioremap(unsigned long offset, unsigned long size) 57 { 58 return ioremap_nocache(offset, size); 59 } 60 61 static inline void iounmap(volatile void __iomem *addr) 62 { 63 } 64 65 #define virt_to_bus virt_to_phys 66 #define bus_to_virt phys_to_virt 67 68 #endif /* CONFIG_MMU */ 69 70 #endif /* __KERNEL__ */ 71 72 #include <asm-generic/io.h> 73 74 #endif /* _XTENSA_IO_H */ 75