arch.h

linux-2.4.29操作系统的源码

/*
 *  linux/include/asm-arm/mach/arch.h
 *
 *  Copyright (C) 2000 Russell King
 *
 * 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.
 */

/*
 * The size of struct machine_desc
 *   (for assembler code)
 */
#define SIZEOF_MACHINE_DESC	48

#ifndef __ASSEMBLY__

extern void setup_initrd(unsigned int start, unsigned int size);
extern void setup_ramdisk(int doload, int prompt, int start, unsigned int rd_sz);

struct machine_desc {
	/*
	 * Note! The first four elements are used
	 * by assembler code in head-armv.S
	 */
	unsigned int		nr;		/* architecture number	*/
	unsigned int		phys_ram;	/* start of physical ram */
	unsigned int		phys_io;	/* start of physical io	*/
	unsigned int		io_pg_offst;	/* byte offset for io 
						 * page tabe entry	*/

	const char		*name;		/* architecture name	*/
	unsigned int		param_offset;	/* parameter page	*/

	unsigned int		video_start;	/* start of video RAM	*/
	unsigned int		video_end;	/* end of video RAM	*/

	unsigned int		reserve_lp0 :1;	/* never has lp0	*/
	unsigned int		reserve_lp1 :1;	/* never has lp1	*/
	unsigned int		reserve_lp2 :1;	/* never has lp2	*/
	unsigned int		soft_reboot :1;	/* soft reboot		*/
	void			(*fixup)(struct machine_desc *,
					 struct param_struct *, char **,
					 struct meminfo *);
	void			(*map_io)(void);/* IO mapping function	*/
	void			(*init_irq)(void);
};

/*
 * Set of macros to define architecture features.  This is built into
 * a table by the linker.
 */
#define MACHINE_START(_type,_name)		\
const struct machine_desc __mach_desc_##_type	\
 __attribute__((__section__(".arch.info"))) = {	\
	.nr		= MACH_TYPE_##_type,	\
	.name		= _name,

#define MAINTAINER(n)

#define BOOT_MEM(_pram,_pio,_vio)		\
	.phys_ram	= _pram,                \
	.phys_io	= _pio,			\
	.io_pg_offst	= ((_vio)>>18)&0xfffc,

#define BOOT_PARAMS(_params)			\
	.param_offset	= _params,

#define VIDEO(_start,_end)			\
	.video_start	= _start,		\
	.video_end	= _end,

#define DISABLE_PARPORT(_n)			\
	.reserve_lp##_n	= 1,

#define BROKEN_HLT /* unused */

#define SOFT_REBOOT				\
	.soft_reboot	= 1,

#define FIXUP(_func)				\
	.fixup		= _func,

#define MAPIO(_func)				\
	.map_io		= _func,

#define INITIRQ(_func)				\
	.init_irq	= _func,

#define MACHINE_END				\
};

#endif