setup.c

linux-2.4.29操作系统的源码

/*
 * setup.c
 *
 * Carsten Langgaard, [e-mail]
 * Copyright (C) 1999 MIPS Technologies, Inc.  All rights reserved.
 *
 * Thomas Horsten <[e-mail]>
 * Copyright (C) 2000 LASAT Networks A/S.
 *
 * Brian Murphy <[e-mail]>
 *
 * ########################################################################
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope 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.
 *
 * ########################################################################
 *
 * Lasat specific setup.
 */
#include <linux/config.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/ide.h>

#include <linux/interrupt.h>
#include <asm/time.h>

#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/lasat/lasat.h>

#include <linux/serial.h>
#include <asm/serial.h>
#include <asm/lasat/serial.h>

#if CONFIG_PICVUE
#include <linux/notifier.h>
#endif

#include "ds1603.h"
#include "at93c.h"
#include <asm/lasat/ds1603.h>
#include <asm/lasat/picvue.h>
#include <asm/lasat/eeprom.h>

#include "prom.h"

int lasat_command_line = 0;
void lasatint_init(void);

#ifdef CONFIG_BLK_DEV_IDE
extern struct ide_ops std_ide_ops;
extern struct ide_ops *ide_ops;
#endif

extern char arcs_cmdline[CL_SIZE];

extern void lasat_reboot_setup(void);
extern void pcisetup(void);
extern void edhac_init(void *, void *, void *);
extern void addrflt_init(void);

struct lasat_misc lasat_misc_info[N_MACHTYPES] = {
	{(void *)KSEG1ADDR(0x1c840000), (void *)KSEG1ADDR(0x1c800000), 2},
	{(void *)KSEG1ADDR(0x11080000), (void *)KSEG1ADDR(0x11000000), 6}
};

struct lasat_misc *lasat_misc = NULL;

#ifdef CONFIG_DS1603
static struct ds_defs ds_defs[N_MACHTYPES] = {
	{ (void *)DS1603_REG_100, (void *)DS1603_REG_100,
		DS1603_RST_100, DS1603_CLK_100, DS1603_DATA_100,
		DS1603_DATA_SHIFT_100, 0, 0 },
	{ (void *)DS1603_REG_200, (void *)DS1603_DATA_REG_200,
		DS1603_RST_200, DS1603_CLK_200, DS1603_DATA_200,
		DS1603_DATA_READ_SHIFT_200, 1, 2000 }
};
#endif

#ifdef CONFIG_PICVUE
#include "picvue.h"
static struct pvc_defs pvc_defs[N_MACHTYPES] = {
	{ (void *)PVC_REG_100, PVC_DATA_SHIFT_100, PVC_DATA_M_100,
		PVC_E_100, PVC_RW_100, PVC_RS_100 },
	{ (void *)PVC_REG_200, PVC_DATA_SHIFT_200, PVC_DATA_M_200,
		PVC_E_200, PVC_RW_200, PVC_RS_200 }
};
#endif

static int lasat_panic_display(struct notifier_block *this,
			     unsigned long event, void *ptr)
{
#ifdef CONFIG_PICVUE
	unsigned char *string = ptr;
	if (string == NULL)
		string = "Kernel Panic";
	pvc_dump_string(string);
#endif
	return NOTIFY_DONE;
}

static int lasat_panic_prom_monitor(struct notifier_block *this,
			     unsigned long event, void *ptr)
{
	prom_monitor();
	return NOTIFY_DONE;
}

static struct notifier_block lasat_panic_block[] = 
{
	{ lasat_panic_display, NULL, INT_MAX },
	{ lasat_panic_prom_monitor, NULL, INT_MIN }
};

#ifdef CONFIG_BLK_DEV_IDE
static int lasat_ide_default_irq(ide_ioreg_t base) {
	return 0;
}

static ide_ioreg_t lasat_ide_default_io_base(int index) {
	return 0;
}
#endif

static void lasat_time_init(void)
{
	mips_hpt_frequency = lasat_board_info.li_cpu_hz / 2;
}

static void lasat_timer_setup(struct irqaction *irq)
{

	write_c0_compare(
		read_c0_count() + 
		mips_hpt_frequency / HZ);
	change_c0_status(ST0_IM, IE_IRQ0 | IE_IRQ5);
}

#define MIPS_CPU_TIMER_IRQ 7
asmlinkage void lasat_timer_interrupt(struct pt_regs *regs)
{
	ll_timer_interrupt(MIPS_CPU_TIMER_IRQ, regs);
}

void __init serial_init(void)
{
#ifdef CONFIG_SERIAL
	struct serial_struct s;

	memset(&s, 0, sizeof(s));

	s.flags = STD_COM_FLAGS;
	s.io_type = SERIAL_IO_MEM;

	if (mips_machtype == MACH_LASAT_100) {
		s.baud_base = LASAT_BASE_BAUD_100;
		s.irq = LASATINT_UART_100;
		s.iomem_reg_shift = LASAT_UART_REGS_SHIFT_100;
		s.iomem_base = (u8 *)KSEG1ADDR(LASAT_UART_REGS_BASE_100);
	} else {
		s.baud_base = LASAT_BASE_BAUD_200;
		s.irq = LASATINT_UART_200;
		s.iomem_reg_shift = LASAT_UART_REGS_SHIFT_200;
		s.iomem_base = (u8 *)KSEG1ADDR(LASAT_UART_REGS_BASE_200);
	}

	if (early_serial_setup(&s) != 0)
		printk(KERN_ERR "Serial setup failed!\n");
#endif
}

void __init lasat_setup(void)
{
	int i;
	lasat_misc  = &lasat_misc_info[mips_machtype];
#ifdef CONFIG_PICVUE
	picvue = &pvc_defs[mips_machtype];
#endif

	/* Set up panic notifier */
	for (i = 0; i < sizeof(lasat_panic_block) / sizeof(struct notifier_block); i++)
		notifier_chain_register(&panic_notifier_list, &lasat_panic_block[i]);

#ifdef CONFIG_BLK_DEV_IDE
	ide_ops = &std_ide_ops;
	ide_ops->ide_default_irq = &lasat_ide_default_irq;
	ide_ops->ide_default_io_base = &lasat_ide_default_io_base;
#endif

	lasat_reboot_setup();

	board_time_init = lasat_time_init;
	board_timer_setup = lasat_timer_setup;

#ifdef CONFIG_DS1603
	ds1603 = &ds_defs[mips_machtype];
	rtc_get_time = ds1603_read;
	rtc_set_time = ds1603_set;
#endif

	serial_init();

	/* Switch from prom exception handler to normal mode */
	change_c0_status(ST0_BEV,0);

	prom_printf("Lasat specific initialization complete\n");
}