1 /* arch/arm/mach-lh7a40x/include/mach/hardware.h
3 * Copyright (C) 2004 Coastal Environmental Systems
5 * [ Substantially cribbed from arch/arm/mach-pxa/include/mach/hardware.h ]
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
13 #ifndef __ASM_ARCH_HARDWARE_H
14 #define __ASM_ARCH_HARDWARE_H
16 #include <asm/sizes.h> /* Added for the sake of amba-clcd driver */
18 #define io_p2v(x) (0xf0000000 | (((x) & 0xfff00000) >> 4) | ((x) & 0x0000ffff))
19 #define io_v2p(x) ( (((x) & 0x0fff0000) << 4) | ((x) & 0x0000ffff))
23 # define __REG(x) io_p2v(x)
24 # define __PREG(x) io_v2p(x)
29 # define __REG(x) (*((volatile u32 *)io_p2v(x)))
32 * This __REG() version gives the same results as the one above, except
33 * that we are fooling gcc somehow so it generates far better and smaller
34 * assembly code for access to contiguous registers. It's a shame that gcc
35 * doesn't guess this by itself.
37 #include <asm/types.h>
38 typedef struct { volatile u32 offset[4096]; } __regbase;
39 # define __REGP(x) ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
40 # define __REG(x) __REGP(io_p2v(x))
41 typedef struct { volatile u16 offset[4096]; } __regbase16;
42 # define __REGP16(x) ((__regbase16 *)((x)&~4095))->offset[((x)&4095)>>1]
43 # define __REG16(x) __REGP16(io_p2v(x))
44 typedef struct { volatile u8 offset[4096]; } __regbase8;
45 # define __REGP8(x) ((__regbase8 *)((x)&~4095))->offset[(x)&4095]
46 # define __REG8(x) __REGP8(io_p2v(x))
49 /* Let's kick gcc's ass again... */
50 # define __REG2(x,y) \
51 ( __builtin_constant_p(y) ? (__REG((x) + (y))) \
52 : (*(volatile u32 *)((u32)&__REG(x) + (y))) )
54 # define __PREG(x) (io_v2p((u32)&(x)))
58 #define MASK_AND_SET(v,m,s) (v) = ((v)&~(m))|(s)
60 #include "registers.h"
62 #endif /* _ASM_ARCH_HARDWARE_H */