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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 
 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 */
 60 

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