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/*
* linux/include/asm-arm/arch-pxa/hardware.h
*
* Author: Nicolas Pitre
* Created: Jun 15, 2001
* Copyright: MontaVista Software Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARCH_HARDWARE_H
#define __ASM_ARCH_HARDWARE_H
/*
* We requires absolute addresses.
*/
#define PCIO_BASE 0
/*
* Workarounds for at least 2 errata so far require this.
* The mapping is set in mach-pxa/generic.c.
*/
#define UNCACHED_PHYS_0 0xff000000
#define UNCACHED_ADDR UNCACHED_PHYS_0
/*
* Intel PXA2xx internal register mapping:
*
* 0x40000000 - 0x41ffffff <--> 0xf2000000 - 0xf3ffffff
* 0x44000000 - 0x45ffffff <--> 0xf4000000 - 0xf5ffffff
* 0x48000000 - 0x49ffffff <--> 0xf6000000 - 0xf7ffffff
* 0x4c000000 - 0x4dffffff <--> 0xf8000000 - 0xf9ffffff
* 0x50000000 - 0x51ffffff <--> 0xfa000000 - 0xfbffffff
* 0x54000000 - 0x55ffffff <--> 0xfc000000 - 0xfdffffff
* 0x58000000 - 0x59ffffff <--> 0xfe000000 - 0xffffffff
*
* Note that not all PXA2xx chips implement all those addresses, and the
* kernel only maps the minimum needed range of this mapping.
*/
#define io_p2v(x) (0xf2000000 + ((x) & 0x01ffffff) + (((x) & 0x1c000000) >> 1))
#define io_v2p(x) (0x3c000000 + ((x) & 0x01ffffff) + (((x) & 0x0e000000) << 1))
#ifndef __ASSEMBLY__
#if 0
# define __REG(x) (*((volatile u32 *)io_p2v(x)))
#else
/*
* This __REG() version gives the same results as the one above, except
* that we are fooling gcc somehow so it generates far better and smaller
* assembly code for access to contigous registers. It's a shame that gcc
* doesn't guess this by itself.
*/
#include <asm/types.h>
typedef struct { volatile u32 offset[4096]; } __regbase;
# define __REGP(x) ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
# define __REG(x) __REGP(io_p2v(x))
#endif
/* With indexed regs we don't want to feed the index through io_p2v()
especially if it is a variable, otherwise horrible code will result. */
# define __REG2(x,y) (*(volatile u32 *)((u32)&__REG(x) + (y)))
# define __PREG(x) (io_v2p((u32)&(x)))
#else
# define __REG(x) io_p2v(x)
# define __PREG(x) io_v2p(x)
#endif
#ifndef __ASSEMBLY__
/*
* Handy routine to set GPIO alternate functions
*/
extern void pxa_gpio_mode( int gpio_mode );
/*
* Routine to enable or disable CKEN
*/
extern void pxa_set_cken(int clock, int enable);
/*
* return current memory and LCD clock frequency in units of 10kHz
*/
extern unsigned int get_memclk_frequency_10khz(void);
extern unsigned int get_lcdclk_frequency_10khz(void);
#endif
#endif /* _ASM_ARCH_HARDWARE_H */
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