setup.c

一个2.4.21版本的嵌入式linux内核

/*
 * Copyright (C) 2000, 2001 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/*
 * Setup code for the SWARM board
 */

#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/blk.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/console.h>

#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/sb1250_regs.h>
#include <asm/sibyte/sb1250_genbus.h>
#include <asm/sibyte/64bit.h>
#include <asm/sibyte/swarm.h>

extern struct rtc_ops *rtc_ops;
extern struct rtc_ops swarm_rtc_ops;

#ifdef CONFIG_BLK_DEV_IDE
extern struct ide_ops std_ide_ops;
#ifdef CONFIG_BLK_DEV_IDE_SIBYTE
extern struct ide_ops sibyte_ide_ops;
#endif
#endif

#ifdef CONFIG_L3DEMO
extern void *l3info;
#endif

static unsigned char *led_ptr;
#define LED_BASE_ADDR (A_IO_EXT_REG(R_IO_EXT_REG(R_IO_EXT_START_ADDR, LEDS_CS)))
#define setled(index, c) led_ptr[(3-((index)&3)) << 3] = (c)

const char *get_system_type(void)
{
	return "SiByte Swarm";
}


void __init bus_error_init(void)
{
}

void __init swarm_timer_setup(struct irqaction *irq)
{
        /*
         * we don't set up irqaction, because we will deliver timer
         * interrupts through low-level (direct) meachanism.
         */

        /* We only need to setup the generic timer */
        sb1250_time_init();
}

extern int xicor_set_time(unsigned long);
extern unsigned long xicor_get_time(void);
extern void sb1250_setup(void);

void __init swarm_setup(void)
{
	extern int panic_timeout;

	sb1250_setup();

	panic_timeout = 5;  /* For debug.  */

        board_timer_setup = swarm_timer_setup;

        rtc_get_time = xicor_get_time;
        rtc_set_time = xicor_set_time;

#ifdef CONFIG_L3DEMO
	if (l3info != NULL) {
		printk("\n");
	}
#endif
	printk("This kernel optimized for "
#ifdef CONFIG_SIMULATION
	       "simulation"
#else
	       "board"
#endif
	       " runs "
#ifdef CONFIG_SIBYTE_CFE
	       "with"
#else
	       "without"
#endif
	       " CFE\n");

#ifdef CONFIG_BLK_DEV_IDE
#ifdef CONFIG_BLK_DEV_IDE_SIBYTE
	ide_ops = &sibyte_ide_ops;
#else
	ide_ops = &std_ide_ops;
#endif
#endif

	/* Set up the LED base address */
#ifdef __MIPSEL__
	/* Pass1 workaround (bug 1624) */
	if (sb1250_pass == K_SYS_REVISION_PASS1)
		led_ptr = (unsigned char *)
			((unsigned long)(KSEG1 | (G_IO_START_ADDR(csr_in32(4+(KSEG1|LED_BASE_ADDR))) << S_IO_ADDRBASE))+0x20);
	else
#endif
		led_ptr = (unsigned char *)
			((unsigned long)(KSEG1 | (G_IO_START_ADDR(csr_in32(KSEG1|LED_BASE_ADDR)) << S_IO_ADDRBASE))+0x20);

#ifdef CONFIG_VT
#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif
	screen_info = (struct screen_info) {
		0, 0,           /* orig-x, orig-y */
		0,              /* unused */
		52,             /* orig_video_page */
		3,              /* orig_video_mode */
		80,             /* orig_video_cols */
		4626, 3, 9,     /* unused, ega_bx, unused */
		25,             /* orig_video_lines */
		0x22,           /* orig_video_isVGA */
		16              /* orig_video_points */
       };
       /* XXXKW for CFE, get lines/cols from environment */
#endif
}

void setleds(char *str)
{
	int i;
	for (i = 0; i < 4; i++) {
		if (!str[i]) {
			for (; i < 4; i++) {
				setled(' ', str[i]);
			}
		} else {
			setled(i, str[i]);
		}
	}
}

#include <linux/timer.h>

static struct timer_list led_timer;
static unsigned char default_led_msg[] =
	"Today: the CSWARM.  Tomorrow: the WORLD!!!!           ";
static unsigned char *led_msg = default_led_msg;
static unsigned char *led_msg_ptr = default_led_msg;

void set_led_msg(char *new_msg)
{
	led_msg = new_msg;
	led_msg_ptr = new_msg;
	setleds("    ");
}

static void move_leds(unsigned long arg)
{
	int i;
	unsigned char *tmp = led_msg_ptr;
	for (i = 0; i < 4; i++) {
		setled(i, *tmp);
		tmp++;
		if (!*tmp) {
			tmp = led_msg;
		}
	}
	led_msg_ptr++;
	if (!*led_msg_ptr) {
 		led_msg_ptr = led_msg;
	}
	del_timer(&led_timer);
	led_timer.expires = jiffies + (HZ/8);
	add_timer(&led_timer);
}

void hack_leds(void)
{
	init_timer(&led_timer);
	led_timer.expires = jiffies + (HZ/8);
	led_timer.data = 0;
	led_timer.function = move_leds;
	add_timer(&led_timer);
}