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> |
| bfae8ee8 | 17 | #include <linux/bug.h> |
| 6656920b | 18 | #include <linux/kernel.h> |
| 9a8fd558 CZ |
19 | |
| 20 | #include <linux/types.h> | |
| 9a8fd558 | 21 | |
| 00c81d23 CZ |
22 | #define XCHAL_KIO_CACHED_VADDR 0xe0000000 |
| 23 | #define XCHAL_KIO_BYPASS_VADDR 0xf0000000 | |
| 173d6681 | 24 | #define XCHAL_KIO_PADDR 0xf0000000 |
| 00c81d23 CZ |
25 | #define XCHAL_KIO_SIZE 0x10000000 |
| 26 | ||
| 27 | #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x)) | |
| d38efc1f | 28 | #define IO_SPACE_LIMIT ~0 |
| 9a8fd558 | 29 | |
| d38efc1f | 30 | #ifdef CONFIG_MMU |
| 9a8fd558 | 31 | /* |
| d38efc1f | 32 | * Return the virtual address for the specified bus memory. |
| 173d6681 | 33 | * Note that we currently don't support any address outside the KIO segment. |
| 9a8fd558 | 34 | */ |
| 02f37748 MF |
35 | static inline void __iomem *ioremap_nocache(unsigned long offset, |
| 36 | unsigned long size) | |
| 9a8fd558 | 37 | { |
| 173d6681 | 38 | if (offset >= XCHAL_KIO_PADDR |
| 02f37748 | 39 | && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) |
| 173d6681 | 40 | return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); |
| 173d6681 CZ |
41 | else |
| 42 | BUG(); | |
| 9a8fd558 CZ |
43 | } |
| 44 | ||
| 02f37748 MF |
45 | static inline void __iomem *ioremap_cache(unsigned long offset, |
| 46 | unsigned long size) | |
| 9a8fd558 | 47 | { |
| 173d6681 | 48 | if (offset >= XCHAL_KIO_PADDR |
| 02f37748 | 49 | && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) |
| 173d6681 CZ |
50 | return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); |
| 51 | else | |
| 52 | BUG(); | |
| 9a8fd558 CZ |
53 | } |
| 54 | ||
| 02f37748 MF |
55 | #define ioremap_wc ioremap_nocache |
| 56 | ||
| 57 | static inline void __iomem *ioremap(unsigned long offset, unsigned long size) | |
| 58 | { | |
| 59 | return ioremap_nocache(offset, size); | |
| 60 | } | |
| 61 | ||
| 62 | static inline void iounmap(volatile void __iomem *addr) | |
| 9a8fd558 CZ |
63 | { |
| 64 | } | |
| d38efc1f | 65 | #endif /* CONFIG_MMU */ |
| 9a8fd558 CZ |
66 | |
| 67 | /* | |
| 68 | * Generic I/O | |
| 69 | */ | |
| d38efc1f MF |
70 | #define readb_relaxed readb |
| 71 | #define readw_relaxed readw | |
| 72 | #define readl_relaxed readl | |
| 9a8fd558 CZ |
73 | |
| 74 | #endif /* __KERNEL__ */ | |
| 75 | ||
| d38efc1f MF |
76 | #include <asm-generic/io.h> |
| 77 | ||
| 9a8fd558 | 78 | #endif /* _XTENSA_IO_H */ |