arch/sh/include/asm/io_trapped.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_IO_TRAPPED_H
   3 #define __ASM_SH_IO_TRAPPED_H
   4
   5 #include <linux/list.h>
   6 #include <linux/ioport.h>
   7 #include <asm/page.h>
   8
   9 #define IO_TRAPPED_MAGIC 0xfeedbeef
  10
  11 struct trapped_io {
  12         unsigned int magic;
  13         struct resource *resource;
  14         unsigned int num_resources;
  15         unsigned int minimum_bus_width;
  16         struct list_head list;
  17         void __iomem *virt_base;
  18 } __aligned(PAGE_SIZE);
  19
  20 #ifdef CONFIG_IO_TRAPPED
  21 int register_trapped_io(struct trapped_io *tiop);
  22 int handle_trapped_io(struct pt_regs *regs, unsigned long address);
  23
  24 void __iomem *match_trapped_io_handler(struct list_head *list,
  25                                        unsigned long offset,
  26                                        unsigned long size);
  27
  28 #ifdef CONFIG_HAS_IOMEM
  29 extern struct list_head trapped_mem;
  30
  31 static inline void __iomem *
  32 __ioremap_trapped(unsigned long offset, unsigned long size)
  33 {
  34         return match_trapped_io_handler(&trapped_mem, offset, size);
  35 }
  36 #else
  37 #define __ioremap_trapped(offset, size) NULL
  38 #endif
  39
  40 #ifdef CONFIG_HAS_IOPORT_MAP
  41 extern struct list_head trapped_io;
  42
  43 static inline void __iomem *
  44 __ioport_map_trapped(unsigned long offset, unsigned long size)
  45 {
  46         return match_trapped_io_handler(&trapped_io, offset, size);
  47 }
  48 #else
  49 #define __ioport_map_trapped(offset, size) NULL
  50 #endif
  51
  52 #else
  53 #define register_trapped_io(tiop) (-1)
  54 #define handle_trapped_io(tiop, address) 0
  55 #define __ioremap_trapped(offset, size) NULL
  56 #define __ioport_map_trapped(offset, size) NULL
  57 #endif
  58
  59 #endif /* __ASM_SH_IO_TRAPPED_H */