Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight

[mv-sheeva.git] / arch / mips / cavium-octeon / octeon-irq.c

diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index 1c19af8daa62a3f992f20ecb1a281a527bfec3cd..384f1842bfb1a4c0743979f55ec40b07b4172abb 100644 (file)
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -7,9 +7,11 @@
  */
 #include <linux/irq.h>
 #include <linux/interrupt.h>
-#include <linux/hardirq.h>
+#include <linux/smp.h>
 
 #include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-pexp-defs.h>
+#include <asm/octeon/cvmx-npi-defs.h>
 
 DEFINE_RWLOCK(octeon_irq_ciu0_rwlock);
 DEFINE_RWLOCK(octeon_irq_ciu1_rwlock);
@@ -177,7 +179,7 @@ static void octeon_irq_ciu0_disable(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
+static int octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
 {
        int cpu;
        int bit = irq - OCTEON_IRQ_WORKQ0;      /* Bit 0-63 of EN0 */
@@ -199,6 +201,8 @@ static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask
         */
        cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2));
        write_unlock(&octeon_irq_ciu0_rwlock);
+
+       return 0;
 }
 #endif
 
@@ -292,7 +296,7 @@ static void octeon_irq_ciu1_disable(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
+static int octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
 {
        int cpu;
        int bit = irq - OCTEON_IRQ_WDOG0;       /* Bit 0-63 of EN1 */
@@ -315,6 +319,8 @@ static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask
         */
        cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1));
        write_unlock(&octeon_irq_ciu1_rwlock);
+
+       return 0;
 }
 #endif
 
@@ -495,3 +501,62 @@ asmlinkage void plat_irq_dispatch(void)
                }
        }
 }
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int is_irq_enabled_on_cpu(unsigned int irq, unsigned int cpu)
+{
+       unsigned int isset;
+#ifdef CONFIG_SMP
+       int coreid = cpu_logical_map(cpu);
+#else
+       int coreid = cvmx_get_core_num();
+#endif
+       int bit = (irq < OCTEON_IRQ_WDOG0) ?
+               irq - OCTEON_IRQ_WORKQ0 : irq - OCTEON_IRQ_WDOG0;
+       if (irq < 64) {
+               isset = (cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)) &
+                       (1ull << bit)) >> bit;
+       } else {
+              isset = (cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1)) &
+                       (1ull << bit)) >> bit;
+       }
+       return isset;
+}
+
+void fixup_irqs(void)
+{
+       int irq;
+
+       for (irq = OCTEON_IRQ_SW0; irq <= OCTEON_IRQ_TIMER; irq++)
+               octeon_irq_core_disable_local(irq);
+
+       for (irq = OCTEON_IRQ_WORKQ0; irq <= OCTEON_IRQ_GPIO15; irq++) {
+               if (is_irq_enabled_on_cpu(irq, smp_processor_id())) {
+                       /* ciu irq migrates to next cpu */
+                       octeon_irq_chip_ciu0.disable(irq);
+                       octeon_irq_ciu0_set_affinity(irq, &cpu_online_map);
+               }
+       }
+
+#if 0
+       for (irq = OCTEON_IRQ_MBOX0; irq <= OCTEON_IRQ_MBOX1; irq++)
+               octeon_irq_mailbox_mask(irq);
+#endif
+       for (irq = OCTEON_IRQ_UART0; irq <= OCTEON_IRQ_BOOTDMA; irq++) {
+               if (is_irq_enabled_on_cpu(irq, smp_processor_id())) {
+                       /* ciu irq migrates to next cpu */
+                       octeon_irq_chip_ciu0.disable(irq);
+                       octeon_irq_ciu0_set_affinity(irq, &cpu_online_map);
+               }
+       }
+
+       for (irq = OCTEON_IRQ_UART2; irq <= OCTEON_IRQ_RESERVED135; irq++) {
+               if (is_irq_enabled_on_cpu(irq, smp_processor_id())) {
+                       /* ciu irq migrates to next cpu */
+                       octeon_irq_chip_ciu1.disable(irq);
+                       octeon_irq_ciu1_set_affinity(irq, &cpu_online_map);
+               }
+       }
+}
+
+#endif /* CONFIG_HOTPLUG_CPU */