arch.c

来自「是关于linux2.5.1的完全源码」· C语言 代码 · 共 62 行

/*
 * linux/arch/arm/mach-iop310/arch.c
 *
 * Author: Nicolas Pitre <[e-mail]>
 * Copyright (C) 2001 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.
 *
 */
#include <linux/config.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <asm/types.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/memory.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#ifdef CONFIG_ARCH_IQ80310
extern void iq80310_map_io(void);
extern void iq80310_init_irq(void);

static void __init
fixup_iq80310(struct machine_desc *desc, struct param_struct *params,
	      char **cmdline, struct meminfo *mi)
{
	system_rev = (*(volatile unsigned int*)0xfe830000) & 0x0f;

	if(system_rev)
		system_rev = 0xF;

	mi->bank[0].start = PHYS_OFFSET;
	mi->bank[0].size  = (32*1024*1024);
	mi->bank[0].node  = 0;
	mi->nr_banks      = 1;

#ifdef CONFIG_ROOT_NFS
	ROOT_DEV = to_kdev_t(0x00FF);   /* /dev/nfs pseudo device */
#elif defined(CONFIG_BLK_DEV_INITRD)
	setup_ramdisk( 1, 0, 0, CONFIG_BLK_DEV_RAM_SIZE );
	setup_initrd( 0xc0800000, 4*1024*1024 );
	ROOT_DEV = mk_kdev(RAMDISK_MAJOR, 0); /* /dev/ram */
#endif
}

MACHINE_START(IQ80310, "Cyclone IQ80310")
	MAINTAINER("MontaVista Software Inc.")
	BOOT_MEM(0xa0000000, 0xfe000000, 0xfe000000)
	FIXUP(fixup_iq80310)
	MAPIO(iq80310_map_io)
	INITIRQ(iq80310_init_irq)
MACHINE_END

#else
#error No machine descriptor defined for this IOP310 implementation
#endif