Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6

[pandora-kernel.git] / arch / mips / sibyte / bcm1480 / irq.c

diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index 9cf7d71..a0222fa 100644 (file)
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -15,7 +15,6 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
@@ -84,7 +83,7 @@ extern char sb1250_duart_present[];
 #endif
 #endif
 
-static struct hw_interrupt_type bcm1480_irq_type = {
+static struct irq_chip bcm1480_irq_type = {
        .typename = "BCM1480-IMR",
        .startup = startup_bcm1480_irq,
        .shutdown = shutdown_bcm1480_irq,
@@ -141,7 +140,7 @@ static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask)
 {
        int i = 0, old_cpu, cpu, int_on, k;
        u64 cur_ints;
-       irq_desc_t *desc = irq_desc + irq;
+       struct irq_desc *desc = irq_desc + irq;
        unsigned long flags;
        unsigned int irq_dirty;
 
@@ -187,9 +186,6 @@ static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask)
 #endif
 
 
-/* Defined in arch/mips/sibyte/bcm1480/irq_handler.S */
-extern void bcm1480_irq_handler(void);
-
 /*****************************************************************************/
 
 static unsigned int startup_bcm1480_irq(unsigned int irq)
@@ -279,10 +275,10 @@ void __init init_bcm1480_irqs(void)
                irq_desc[i].action = 0;
                irq_desc[i].depth = 1;
                if (i < BCM1480_NR_IRQS) {
-                       irq_desc[i].handler = &bcm1480_irq_type;
+                       irq_desc[i].chip = &bcm1480_irq_type;
                        bcm1480_irq_owner[i] = 0;
                } else {
-                       irq_desc[i].handler = &no_irq_type;
+                       irq_desc[i].chip = &no_irq_chip;
                }
        }
 }
@@ -305,7 +301,7 @@ static struct irqaction bcm1480_dummy_action = {
 
 int bcm1480_steal_irq(int irq)
 {
-       irq_desc_t *desc = irq_desc + irq;
+       struct irq_desc *desc = irq_desc + irq;
        unsigned long flags;
        int retval = 0;
 
@@ -422,7 +418,6 @@ void __init arch_init_irq(void)
 #endif
        /* Enable necessary IPs, disable the rest */
        change_c0_status(ST0_IM, imask);
-       set_except_vector(0, bcm1480_irq_handler);
 
 #ifdef CONFIG_KGDB
        if (kgdb_flag) {
@@ -473,3 +468,62 @@ void bcm1480_kgdb_interrupt(struct pt_regs *regs)
 }
 
 #endif         /* CONFIG_KGDB */
+
+extern void bcm1480_timer_interrupt(struct pt_regs *regs);
+extern void bcm1480_mailbox_interrupt(struct pt_regs *regs);
+extern void bcm1480_kgdb_interrupt(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+       unsigned int pending;
+
+#ifdef CONFIG_SIBYTE_BCM1480_PROF
+       /* Set compare to count to silence count/compare timer interrupts */
+       write_c0_compare(read_c0_count());
+#endif
+
+       pending = read_c0_cause();
+
+#ifdef CONFIG_SIBYTE_BCM1480_PROF
+       if (pending & CAUSEF_IP7)       /* Cpu performance counter interrupt */
+               sbprof_cpu_intr(exception_epc(regs));
+       else
+#endif
+
+       if (pending & CAUSEF_IP4)
+               bcm1480_timer_interrupt(regs);
+
+#ifdef CONFIG_SMP
+       else if (pending & CAUSEF_IP3)
+               bcm1480_mailbox_interrupt(regs);
+#endif
+
+#ifdef CONFIG_KGDB
+       else if (pending & CAUSEF_IP6)
+               bcm1480_kgdb_interrupt(regs);           /* KGDB (uart 1) */
+#endif
+
+       else if (pending & CAUSEF_IP2) {
+               unsigned long long mask_h, mask_l;
+               unsigned long base;
+
+               /*
+                * Default...we've hit an IP[2] interrupt, which means we've
+                * got to check the 1480 interrupt registers to figure out what
+                * to do.  Need to detect which CPU we're on, now that
+                * smp_affinity is supported.
+                */
+               base = A_BCM1480_IMR_MAPPER(smp_processor_id());
+               mask_h = __raw_readq(
+                       IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H));
+               mask_l = __raw_readq(
+                       IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L));
+
+               if (mask_h) {
+                       if (mask_h ^ 1)
+                               do_IRQ(fls64(mask_h) - 1, regs);
+                       else
+                               do_IRQ(63 + fls64(mask_l), regs);
+               }
+       }
+}