projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 96cf5185 G |
1 | /* |
| 2 | * linux/arch/unicore32/include/asm/io.h | |
| 3 | * | |
| 4 | * Code specific to PKUnity SoC and UniCore ISA | |
| 5 | * | |
| 6 | * Copyright (C) 2001-2010 GUAN Xue-tao | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | #ifndef __UNICORE_IO_H__ | |
| 13 | #define __UNICORE_IO_H__ | |
| 14 | ||
| 15 | #ifdef __KERNEL__ | |
| 16 | ||
| 17 | #include <asm/byteorder.h> | |
| 18 | #include <asm/memory.h> | |
| 96cf5185 | 19 | |
| 1cf46c42 | 20 | #define PCI_IOBASE PKUNITY_PCILIO_BASE |
| 96cf5185 G |
21 | #include <asm-generic/io.h> |
| 22 | ||
| 23 | /* | |
| 24 | * __uc32_ioremap and __uc32_ioremap_cached takes CPU physical address. | |
| 25 | */ | |
| 26 | extern void __iomem *__uc32_ioremap(unsigned long, size_t); | |
| 27 | extern void __iomem *__uc32_ioremap_cached(unsigned long, size_t); | |
| 28 | extern void __uc32_iounmap(volatile void __iomem *addr); | |
| 29 | ||
| 30 | /* | |
| 31 | * ioremap and friends. | |
| 32 | * | |
| 33 | * ioremap takes a PCI memory address, as specified in | |
| 395cf969 | 34 | * Documentation/io-mapping.txt. |
| 96cf5185 G |
35 | * |
| 36 | */ | |
| 37 | #define ioremap(cookie, size) __uc32_ioremap(cookie, size) | |
| 38 | #define ioremap_cached(cookie, size) __uc32_ioremap_cached(cookie, size) | |
| a50e4213 | 39 | #define ioremap_nocache(cookie, size) __uc32_ioremap(cookie, size) |
| 96cf5185 G |
40 | #define iounmap(cookie) __uc32_iounmap(cookie) |
| 41 | ||
| 312c6df4 CG |
42 | #define readb_relaxed readb |
| 43 | #define readw_relaxed readw | |
| 44 | #define readl_relaxed readl | |
| 45 | ||
| 4fde87cb G |
46 | #define HAVE_ARCH_PIO_SIZE |
| 47 | #define PIO_OFFSET (unsigned int)(PCI_IOBASE) | |
| 48 | #define PIO_MASK (unsigned int)(IO_SPACE_LIMIT) | |
| 49 | #define PIO_RESERVED (PIO_OFFSET + PIO_MASK + 1) | |
| 50 | ||
| 8a016596 CG |
51 | #ifdef CONFIG_STRICT_DEVMEM |
| 52 | ||
| 53 | #include <linux/ioport.h> | |
| 54 | #include <linux/mm.h> | |
| 55 | ||
| 56 | /* | |
| 57 | * devmem_is_allowed() checks to see if /dev/mem access to a certain | |
| 58 | * address is valid. The argument is a physical page number. | |
| 59 | * We mimic x86 here by disallowing access to system RAM as well as | |
| 60 | * device-exclusive MMIO regions. This effectively disable read()/write() | |
| 61 | * on /dev/mem. | |
| 62 | */ | |
| 63 | static inline int devmem_is_allowed(unsigned long pfn) | |
| 64 | { | |
| 65 | if (iomem_is_exclusive(pfn << PAGE_SHIFT)) | |
| 66 | return 0; | |
| 67 | if (!page_is_ram(pfn)) | |
| 68 | return 1; | |
| 69 | return 0; | |
| 70 | } | |
| 71 | ||
| 72 | #endif /* CONFIG_STRICT_DEVMEM */ | |
| 73 | ||
| 96cf5185 G |
74 | #endif /* __KERNEL__ */ |
| 75 | #endif /* __UNICORE_IO_H__ */ |