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_nocache(unsigned long offset, 36 unsigned long size) 37 { 38 if (offset >= XCHAL_KIO_PADDR 39 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) 40 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); 41 else 42 return xtensa_ioremap_nocache(offset, size); 43 } 44 45 static inline void __iomem *ioremap_cache(unsigned long offset, 46 unsigned long size) 47 { 48 if (offset >= XCHAL_KIO_PADDR 49 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) 50 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); 51 else 52 return xtensa_ioremap_cache(offset, size); 53 } 54 #define ioremap_cache ioremap_cache 55 #define ioremap_nocache ioremap_nocache 56 57 #define ioremap_wc ioremap_nocache 58 #define ioremap_wt ioremap_nocache 59 60 static inline void __iomem *ioremap(unsigned long offset, unsigned long size) 61 { 62 return ioremap_nocache(offset, size); 63 } 64 65 static inline void iounmap(volatile void __iomem *addr) 66 { 67 unsigned long va = (unsigned long) addr; 68 69 if (!(va >= XCHAL_KIO_CACHED_VADDR && 70 va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) && 71 !(va >= XCHAL_KIO_BYPASS_VADDR && 72 va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE)) 73 xtensa_iounmap(addr); 74 } 75 76 #define virt_to_bus virt_to_phys 77 #define bus_to_virt phys_to_virt 78 79 #endif /* CONFIG_MMU */ 80 81 #include <asm-generic/io.h> 82 83 #endif /* _XTENSA_IO_H */ 84