diff options
Diffstat (limited to 'arch/mips/gt64120/common/irq.c')
| -rw-r--r-- | arch/mips/gt64120/common/irq.c | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/arch/mips/gt64120/common/irq.c b/arch/mips/gt64120/common/irq.c deleted file mode 100644 index 8fc47ede0..000000000 --- a/arch/mips/gt64120/common/irq.c +++ /dev/null @@ -1,300 +0,0 @@ -/* - * arch/mips/gt64120/common/irq.c - * Top-level irq code. This is really common among all MIPS boards. - * Should be "upgraded" to arch/mips/kernel/irq.c - * - * 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 - * - * 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> -#include <asm/pmc/ev64120int.h> - - -#undef IRQ_DEBUG - -#ifdef IRQ_DEBUG -#define DBG(x...) printk(x) -#else -#define DBG(x...) -#endif - -void (*irq_setup)(void); - -/* - * Generic no controller code - */ - -static void no_irq_enable_disable(unsigned int irq) -{ -} - -static unsigned int no_irq_startup(unsigned int irq) -{ - return 0; -} - -static void no_irq_ack(unsigned int irq) -{ - printk(KERN_CRIT "Unexpected IRQ trap at vector %u\n", irq); -} - -struct hw_interrupt_type no_irq_type = { - typename: "none", - startup: no_irq_startup, - shutdown: no_irq_enable_disable, - enable: no_irq_enable_disable, - disable: no_irq_enable_disable, - // ack: no_irq_ack, - // [jsun] cannot use it yet. gt64120 does not have its own handler - ack: NULL, - end: no_irq_enable_disable, -}; - - - -/* - * Controller mappings for all interrupt sources: - */ -irq_desc_t irq_desc[NR_IRQS]; - -unsigned long spurious_count = 0; - -int get_irq_list(char *buf) -{ - int i, len = 0, j; - struct irqaction *action; - - len += sprintf(buf + len, " "); - for (j = 0; j < smp_num_cpus; j++) - len += sprintf(buf + len, "CPU%d ", j); - *(char *) (buf + len++) = '\n'; - - for (i = 0; i < NR_IRQS; i++) { - action = irq_desc[i].action; - if (!action || !action->handler) - continue; - len += sprintf(buf + len, "%3d: ", i); - len += sprintf(buf + len, "%10u ", kstat_irqs(i)); - if (irq_desc[i].handler) - len += - sprintf(buf + len, " %s ", - irq_desc[i].handler->typename); - else - len += sprintf(buf + len, " None "); - len += sprintf(buf + len, " %s", action->name); - for (action = action->next; action; action = action->next) { - len += sprintf(buf + len, ", %s", action->name); - } - len += sprintf(buf + len, "\n"); - } - len += sprintf(buf + len, "BAD: %10lu\n", spurious_count); - return len; -} - -asmlinkage void do_IRQ(int irq, struct pt_regs *regs) -{ - struct irqaction *action; - int cpu; - cpu = smp_processor_id(); - irq_enter(cpu, irq); - kstat.irqs[cpu][irq]++; - if (irq_desc[irq].handler->ack) { - irq_desc[irq].handler->ack(irq); - } - - disable_irq(irq); - - action = irq_desc[irq].action; - if (action && action->handler) { -#ifdef IRQ_DEBUG - if (irq != TIMER) - DBG(KERN_INFO - "rr: irq %d action %p and handler %p\n", irq, - action, action->handler); -#endif - if (!(action->flags & SA_INTERRUPT)) - __sti(); - do { - action->handler(irq, action->dev_id, regs); - action = action->next; - } while (action); - __cli(); - if (irq_desc[irq].handler) { - if (irq_desc[irq].handler->end) - irq_desc[irq].handler->end(irq); - else if (irq_desc[irq].handler->enable) - irq_desc[irq].handler->enable(irq); - } - } - - enable_irq(irq); - irq_exit(cpu, irq); - - if (softirq_active(cpu) & softirq_mask(cpu)) - do_softirq(); - - /* unmasking and bottom half handling is done magically for us. */ -} - -int request_irq(unsigned int irq, - void (*handler) (int, void *, struct pt_regs *), - unsigned long irqflags, const char *devname, void *dev_id) -{ - struct irqaction *old, **p, *action; - unsigned long flags; - if (irq >= NR_IRQS) - return -EINVAL; - - action = (struct irqaction *) - kmalloc(sizeof(struct irqaction), GFP_KERNEL); - if (!action) - return -ENOMEM; - - action->handler = handler; - action->flags = irqflags; - action->mask = 0; - action->name = devname; - action->dev_id = dev_id; - action->next = NULL; - - save_flags(flags); - cli(); - - p = &irq_desc[irq].action; - - if ((old = *p) != NULL) { - /* Can't share interrupts unless both agree to */ - if (!(old->flags & action->flags & SA_SHIRQ)) - return -EBUSY; - /* add new interrupt at end of irq queue */ - do { - p = &old->next; - old = *p; - } while (old); - } - *p = action; - - restore_flags(flags); - enable_irq(irq); - - return 0; -} - - -void free_irq(unsigned int irq, void *dev_id) -{ - struct irqaction *p, *old = NULL; - unsigned long flags; - int count, tmp, removed = 0; - - for (p = irq_desc[irq].action; p != NULL; old = p, p = p->next) { - /* Found the IRQ, is it the correct dev_id? */ - if (dev_id == p->dev_id) { - save_flags(flags); - cli(); - - // remove link from list - if (old) - old->next = p->next; - else - irq_desc[irq].action = p->next; - - restore_flags(flags); - kfree(p); - removed = 1; - break; - } - } -} - -unsigned long probe_irq_on(void) -{ - printk(KERN_INFO "probe_irq_on\n"); - return 0; -} - -int probe_irq_off(unsigned long irqs) -{ - printk(KERN_INFO "probe_irq_off\n"); - return 0; -} - -void __init init_IRQ(void) -{ - int i; - - DBG(KERN_INFO "rr:init_IRQ\n"); - - /* Let's initialize our IRQ descriptors */ - for (i = 0; i < NR_IRQS; i++) { - irq_desc[i].status = 0; - irq_desc[i].handler = &no_irq_type; - irq_desc[i].action = NULL; - irq_desc[i].depth = 0; - irq_desc[i].lock = SPIN_LOCK_UNLOCKED; - } - - irq_setup(); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-indent-level: 4 - * c-brace-imaginary-offset: 0 - * c-brace-offset: -4 - * c-argdecl-indent: 4 - * c-label-offset: -4 - * c-continued-statement-offset: 4 - * c-continued-brace-offset: 0 - * indent-tabs-mode: nil - * tab-width: 8 - * End: - */ |