+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ irq = irq_ffs(pending);
+
+ if (irq == MIPSCPU_INT_I8259A)
+ malta_hw0_irqdispatch();
+ else if (irq > 0)
+ do_IRQ(MIPSCPU_INT_BASE + irq);
+ else
+ spurious_interrupt();
+}
+
+static struct irqaction i8259irq = {
+ .handler = no_action,
+ .name = "XT-PIC cascade"
+};
+
+static struct irqaction corehi_irqaction = {
+ .handler = no_action,
+ .name = "CoreHi"
+};
+
+msc_irqmap_t __initdata msc_irqmap[] = {
+ {MSC01C_INT_TMR, MSC01_IRQ_EDGE, 0},
+ {MSC01C_INT_PCI, MSC01_IRQ_LEVEL, 0},
+};
+int __initdata msc_nr_irqs = sizeof(msc_irqmap)/sizeof(msc_irqmap_t);
+
+msc_irqmap_t __initdata msc_eicirqmap[] = {
+ {MSC01E_INT_SW0, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_SW1, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_I8259A, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_SMI, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_COREHI, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_CORELO, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_TMR, MSC01_IRQ_EDGE, 0},
+ {MSC01E_INT_PCI, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_PERFCTR, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_CPUCTR, MSC01_IRQ_LEVEL, 0}
+};
+int __initdata msc_nr_eicirqs = sizeof(msc_eicirqmap)/sizeof(msc_irqmap_t);
+
+void __init arch_init_irq(void)
+{
+ init_i8259_irqs();
+
+ if (!cpu_has_veic)
+ mips_cpu_irq_init (MIPSCPU_INT_BASE);
+
+ switch(mips_revision_corid) {
+ case MIPS_REVISION_CORID_CORE_MSC:
+ case MIPS_REVISION_CORID_CORE_FPGA2:
+ case MIPS_REVISION_CORID_CORE_FPGA3:
+ case MIPS_REVISION_CORID_CORE_24K:
+ case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+ if (cpu_has_veic)
+ init_msc_irqs (MSC01E_INT_BASE, msc_eicirqmap, msc_nr_eicirqs);
+ else
+ init_msc_irqs (MSC01C_INT_BASE, msc_irqmap, msc_nr_irqs);
+ }
+
+ if (cpu_has_veic) {
+ set_vi_handler (MSC01E_INT_I8259A, malta_hw0_irqdispatch);
+ set_vi_handler (MSC01E_INT_COREHI, corehi_irqdispatch);
+ setup_irq (MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq);
+ setup_irq (MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction);
+ }
+ else if (cpu_has_vint) {
+ set_vi_handler (MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
+ set_vi_handler (MIPSCPU_INT_COREHI, corehi_irqdispatch);
+#ifdef CONFIG_MIPS_MT_SMTC
+ setup_irq_smtc (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq,
+ (0x100 << MIPSCPU_INT_I8259A));
+ setup_irq_smtc (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI,
+ &corehi_irqaction, (0x100 << MIPSCPU_INT_COREHI));
+#else /* Not SMTC */
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+#endif /* CONFIG_MIPS_MT_SMTC */
+ }
+ else {
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+ }
+}