linux/arch/sh/include/asm/io_trapped.h
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   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
  11struct 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
  21int register_trapped_io(struct trapped_io *tiop);
  22int handle_trapped_io(struct pt_regs *regs, unsigned long address);
  23
  24void __iomem *match_trapped_io_handler(struct list_head *list,
  25                                       unsigned long offset,
  26                                       unsigned long size);
  27
  28#ifdef CONFIG_HAS_IOMEM
  29extern struct list_head trapped_mem;
  30
  31static 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
  41extern struct list_head trapped_io;
  42
  43static 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 */
  60
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