arch/sh/include/asm/io_trapped.h

   1 #ifndef __ASM_SH_IO_TRAPPED_H
   2 #define __ASM_SH_IO_TRAPPED_H
   3
   4 #include <linux/list.h>
   5 #include <linux/ioport.h>
   6 #include <asm/page.h>
   7
   8 #define IO_TRAPPED_MAGIC 0xfeedbeef
   9
  10 struct trapped_io {
  11         unsigned int magic;
  12         struct resource *resource;
  13         unsigned int num_resources;
  14         unsigned int minimum_bus_width;
  15         struct list_head list;
  16         void __iomem *virt_base;
  17 } __aligned(PAGE_SIZE);
  18
  19 #ifdef CONFIG_IO_TRAPPED
  20 int register_trapped_io(struct trapped_io *tiop);
  21 int handle_trapped_io(struct pt_regs *regs, unsigned long address);
  22
  23 void __iomem *match_trapped_io_handler(struct list_head *list,
  24                                        unsigned long offset,
  25                                        unsigned long size);
  26
  27 #ifdef CONFIG_HAS_IOMEM
  28 extern struct list_head trapped_mem;
  29
  30 static inline void __iomem *
  31 __ioremap_trapped(unsigned long offset, unsigned long size)
  32 {
  33         return match_trapped_io_handler(&trapped_mem, offset, size);
  34 }
  35 #else
  36 #define __ioremap_trapped(offset, size) NULL
  37 #endif
  38
  39 #ifdef CONFIG_HAS_IOPORT_MAP
  40 extern struct list_head trapped_io;
  41
  42 static inline void __iomem *
  43 __ioport_map_trapped(unsigned long offset, unsigned long size)
  44 {
  45         return match_trapped_io_handler(&trapped_io, offset, size);
  46 }
  47 #else
  48 #define __ioport_map_trapped(offset, size) NULL
  49 #endif
  50
  51 #else
  52 #define register_trapped_io(tiop) (-1)
  53 #define handle_trapped_io(tiop, address) 0
  54 #define __ioremap_trapped(offset, size) NULL
  55 #define __ioport_map_trapped(offset, size) NULL
  56 #endif
  57
  58 #endif /* __ASM_SH_IO_TRAPPED_H */