/* * Copyright (C) 2000 RidgeRun, Inc. * Author: RidgeRun, Inc. *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com * * Copyright 2001 MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org) * *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT, *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *  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., *  675 Mass Ave, Cambridge, MA 02139, USA. * */#include <linux/errno.h>#include <linux/init.h>#include <linux/kernel_stat.h>#include <linux/module.h>#include <linux/signal.h>#include <linux/sched.h>#include <linux/types.h>#include <linux/interrupt.h>#include <linux/ioport.h>#include <linux/timex.h>#include <linux/slab.h>#include <linux/random.h>#include <linux/irq.h>#include <asm/bitops.h>#include <asm/bootinfo.h>#include <asm/io.h>#include <asm/irq.h>#include <asm/mipsregs.h>#include <asm/system.h>static spinlock_t rm7000_irq_lock = SPIN_LOCK_UNLOCKED;/* Function for careful CP0 interrupt mask access */static inline void modify_cp0_intmask(unsigned clr_mask_in, unsigned set_mask_in){	unsigned long status;	unsigned clr_mask;	unsigned set_mask;	/* do the low 8 bits first */	clr_mask = 0xff & clr_mask_in;	set_mask = 0xff & set_mask_in;	status = read_32bit_cp0_register(CP0_STATUS);	status &= ~((clr_mask & 0xFF) << 8);	status |= (set_mask & 0xFF) << 8;	write_32bit_cp0_register(CP0_STATUS, status);	/* do the high 8 bits */	clr_mask = 0xff & (clr_mask_in >> 8);	set_mask = 0xff & (set_mask_in >> 8);	status = read_32bit_cp0_set1_register(CP0_S1_INTCONTROL);	status &= ~((clr_mask & 0xFF) << 8);	status |= (set_mask & 0xFF) << 8;	write_32bit_cp0_set1_register(CP0_S1_INTCONTROL, status);}static inline void mask_irq(unsigned int irq){	modify_cp0_intmask(irq, 0);}static inline void unmask_irq(unsigned int irq){	modify_cp0_intmask(0, irq);}static void enable_cp7000_irq(unsigned int irq){	unsigned long flags;	spin_lock_irqsave(&rm7000_irq_lock, flags);	unmask_irq(1 << irq);	spin_unlock_irqrestore(&rm7000_irq_lock, flags);}static unsigned int startup_cp7000_irq(unsigned int irq){	enable_cp7000_irq(irq);	return 0;				/* never anything pending */}static void disable_cp7000_irq(unsigned int irq){	unsigned long flags;	spin_lock_irqsave(&rm7000_irq_lock, flags);	mask_irq(1 << irq);	spin_unlock_irqrestore(&rm7000_irq_lock, flags);}#define shutdown_cp7000_irq disable_cp7000_irqstatic void mask_and_ack_cp7000_irq(unsigned int irq){	mask_irq(1 << irq);}static void end_cp7000_irq(unsigned int irq){	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))		unmask_irq(1 << irq);}static struct hw_interrupt_type cp7000_hpcdma_irq_type = {	"CP7000",	startup_cp7000_irq,	shutdown_cp7000_irq,	enable_cp7000_irq,	disable_cp7000_irq,	mask_and_ack_cp7000_irq,	end_cp7000_irq,	NULL};extern asmlinkage void ocelot_handle_int(void);extern void gt64120_irq_init(void);void __init init_IRQ(void){	int i;	/*	 * Clear all of the interrupts while we change the able around a bit.	 * int-handler is not on bootstrap	 */	clear_cp0_status(ST0_IM | ST0_BEV);	__cli();	/* Sets the first-level interrupt dispatcher. */	set_except_vector(0, ocelot_handle_int);	init_generic_irq();	for (i = 0; i <= 15; i++) {		irq_desc[i].status	= IRQ_DISABLED;		irq_desc[i].action	= 0;		irq_desc[i].depth	= 1;		irq_desc[i].handler	= &cp7000_hpcdma_irq_type;	}	gt64120_irq_init();#ifdef CONFIG_REMOTE_DEBUG	printk("start kgdb ...\n");	set_debug_traps();	breakpoint();	/* you may move this line to whereever you want :-) */#endif#ifdef CONFIG_GDB_CONSOLE	register_gdb_console();#endif}