projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9a8fd558 | 1 | /* |
| 173d6681 | 2 | * include/asm-xtensa/io.h |
| 9a8fd558 CZ |
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__ | |
| 9a8fd558 | 15 | #include <asm/byteorder.h> |
| c51aea80 | 16 | #include <asm/page.h> |
| 4809bb46 | 17 | #include <asm/vectors.h> |
| bfae8ee8 | 18 | #include <linux/bug.h> |
| 6656920b | 19 | #include <linux/kernel.h> |
| 9a8fd558 CZ |
20 | |
| 21 | #include <linux/types.h> | |
| 9a8fd558 | 22 | |
| 00c81d23 | 23 | #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x)) |
| d38efc1f | 24 | #define IO_SPACE_LIMIT ~0 |
| 9a8fd558 | 25 | |
| d38efc1f | 26 | #ifdef CONFIG_MMU |
| 6cb97111 | 27 | |
| 9848e49a | 28 | #if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF) |
| 6cb97111 BS |
29 | extern unsigned long xtensa_kio_paddr; |
| 30 | ||
| 31 | static inline unsigned long xtensa_get_kio_paddr(void) | |
| 32 | { | |
| 33 | return xtensa_kio_paddr; | |
| 34 | } | |
| 35 | #endif | |
| 36 | ||
| 9a8fd558 | 37 | /* |
| d38efc1f | 38 | * Return the virtual address for the specified bus memory. |
| 173d6681 | 39 | * Note that we currently don't support any address outside the KIO segment. |
| 9a8fd558 | 40 | */ |
| 02f37748 MF |
41 | static inline void __iomem *ioremap_nocache(unsigned long offset, |
| 42 | unsigned long size) | |
| 9a8fd558 | 43 | { |
| 173d6681 | 44 | if (offset >= XCHAL_KIO_PADDR |
| 02f37748 | 45 | && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) |
| 173d6681 | 46 | return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); |
| 173d6681 CZ |
47 | else |
| 48 | BUG(); | |
| 9a8fd558 CZ |
49 | } |
| 50 | ||
| 02f37748 MF |
51 | static inline void __iomem *ioremap_cache(unsigned long offset, |
| 52 | unsigned long size) | |
| 9a8fd558 | 53 | { |
| 173d6681 | 54 | if (offset >= XCHAL_KIO_PADDR |
| 02f37748 | 55 | && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) |
| 173d6681 CZ |
56 | return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); |
| 57 | else | |
| 58 | BUG(); | |
| 9a8fd558 CZ |
59 | } |
| 60 | ||
| 02f37748 MF |
61 | #define ioremap_wc ioremap_nocache |
| 62 | ||
| 63 | static inline void __iomem *ioremap(unsigned long offset, unsigned long size) | |
| 64 | { | |
| 65 | return ioremap_nocache(offset, size); | |
| 66 | } | |
| 67 | ||
| 68 | static inline void iounmap(volatile void __iomem *addr) | |
| 9a8fd558 CZ |
69 | { |
| 70 | } | |
| cddfcbcd CZ |
71 | |
| 72 | #define virt_to_bus virt_to_phys | |
| 73 | #define bus_to_virt phys_to_virt | |
| 74 | ||
| d38efc1f | 75 | #endif /* CONFIG_MMU */ |
| 9a8fd558 CZ |
76 | |
| 77 | /* | |
| 78 | * Generic I/O | |
| 79 | */ | |
| d38efc1f MF |
80 | #define readb_relaxed readb |
| 81 | #define readw_relaxed readw | |
| 82 | #define readl_relaxed readl | |
| 9a8fd558 CZ |
83 | |
| 84 | #endif /* __KERNEL__ */ | |
| 85 | ||
| d38efc1f MF |
86 | #include <asm-generic/io.h> |
| 87 | ||
| 9a8fd558 | 88 | #endif /* _XTENSA_IO_H */ |