1 /*
2  * arch/arm/mach-ns9xxx/include/mach/hardware.h
3  *
4  * Copyright (C) 2006 by Digi International Inc.
5  * All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published by
9  * the Free Software Foundation.
10  */
11 #ifndef __ASM_ARCH_HARDWARE_H
12 #define __ASM_ARCH_HARDWARE_H
13 
14 /*
15  * NetSilicon NS9xxx internal mapping:
16  *
17  * physical                <--> virtual
18  * 0x90000000 - 0x906fffff <--> 0xf9000000 - 0xf96fffff
19  * 0xa0100000 - 0xa0afffff <--> 0xfa100000 - 0xfaafffff
20  */
21 #define io_p2v(x)	(0xf0000000 \
22 			 + (((x) & 0xf0000000) >> 4) \
23 			 + ((x) & 0x00ffffff))
24 
25 #define io_v2p(x)	((((x) & 0x0f000000) << 4) \
26 			 + ((x) & 0x00ffffff))
27 
28 #define __REGSHIFT(mask)	((mask) & (-(mask)))
29 
30 #define __REGBIT(bit)		((u32)1 << (bit))
31 #define __REGBITS(hbit, lbit)	((((u32)1 << ((hbit) - (lbit) + 1)) - 1) << (lbit))
32 #define __REGVAL(mask, value)	(((value) * __REGSHIFT(mask)) & (mask))
33 
34 #ifndef __ASSEMBLY__
35 
36 #  define __REG(x)	((void __iomem __force *)io_p2v((x)))
37 #  define __REG2(x, y)	((void __iomem __force *)(io_p2v((x)) + 4 * (y)))
38 
39 #  define __REGSET(var, field, value)					\
40 	((var) = (((var) & ~((field) & ~(value))) | (value)))
41 
42 #  define REGSET(var, reg, field, value)				\
43 	__REGSET(var, reg ## _ ## field, reg ## _ ## field ## _ ## value)
44 
45 #  define REGSET_IDX(var, reg, field, idx, value)			\
46 	__REGSET(var, reg ## _ ## field((idx)), reg ## _ ## field ## _ ## value((idx)))
47 
48 #  define REGSETIM(var, reg, field, value)				\
49 	__REGSET(var, reg ## _ ## field, __REGVAL(reg ## _ ## field, (value)))
50 
51 #  define REGSETIM_IDX(var, reg, field, idx, value)			\
52 	__REGSET(var, reg ## _ ## field((idx)), __REGVAL(reg ## _ ## field((idx)), (value)))
53 
54 #  define __REGGET(var, field)						\
55 	(((var) & (field)))
56 
57 #  define REGGET(var, reg, field)					\
58 	 __REGGET(var, reg ## _ ## field)
59 
60 #  define REGGET_IDX(var, reg, field, idx)				\
61 	 __REGGET(var, reg ## _ ## field((idx)))
62 
63 #  define REGGETIM(var, reg, field)					\
64 	 __REGGET(var, reg ## _ ## field) / __REGSHIFT(reg ## _ ## field)
65 
66 #  define REGGETIM_IDX(var, reg, field, idx)				\
67 	 __REGGET(var, reg ## _ ## field((idx))) /			\
68 	 __REGSHIFT(reg ## _ ## field((idx)))
69 
70 #else
71 
72 #  define __REG(x)	io_p2v(x)
73 #  define __REG2(x, y)	io_p2v((x) + 4 * (y))
74 
75 #endif
76 
77 #endif /* ifndef __ASM_ARCH_HARDWARE_H */
78