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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