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 #include <asm/byteorder.h> 15 #include <asm/page.h> 16 #include <asm/vectors.h> 17 #include <linux/bug.h> 18 #include <linux/kernel.h> 19 20 #include <linux/types.h> 21 22 #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x)) 23 #define IO_SPACE_LIMIT ~0 24 #define PCI_IOBASE ((void __iomem *)XCHAL_KIO_BYPASS_VADDR) 25 26 #ifdef CONFIG_MMU 27 28 void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size); 29 void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size); 30 void xtensa_iounmap(volatile void __iomem *addr); 31 32 /* 33 * Return the virtual address for the specified bus memory. 34 */ 35 static inline void __iomem *ioremap(unsigned long offset, unsigned long size) 36 { 37 if (offset >= XCHAL_KIO_PADDR 38 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) 39 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); 40 else 41 return xtensa_ioremap_nocache(offset, size); 42 } 43 44 static inline void __iomem *ioremap_cache(unsigned long offset, 45 unsigned long size) 46 { 47 if (offset >= XCHAL_KIO_PADDR 48 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) 49 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); 50 else 51 return xtensa_ioremap_cache(offset, size); 52 } 53 #define ioremap_cache ioremap_cache 54 55 static inline void iounmap(volatile void __iomem *addr) 56 { 57 unsigned long va = (unsigned long) addr; 58 59 if (!(va >= XCHAL_KIO_CACHED_VADDR && 60 va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) && 61 !(va >= XCHAL_KIO_BYPASS_VADDR && 62 va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE)) 63 xtensa_iounmap(addr); 64 } 65 66 #endif /* CONFIG_MMU */ 67 68 #include <asm-generic/io.h> 69 70 #endif /* _XTENSA_IO_H */ 71