Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mips / sni / irq.c

diff --git a/kernel/arch/mips/sni/irq.c b/kernel/arch/mips/sni/irq.c
new file mode 100644 (file)
index 0000000..ac61b90
--- /dev/null
+++ b/kernel/arch/mips/sni/irq.c
@@ -0,0 +1,82 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1992 Linus Torvalds
+ * Copyright (C) 1994 - 2000 Ralf Baechle
+ * Copyright (C) 2006 Thomas Bogendoerfer
+ */
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/sni.h>
+#include <asm/irq.h>
+#include <asm/irq_cpu.h>
+
+void (*sni_hwint)(void);
+
+asmlinkage void plat_irq_dispatch(void)
+{
+       sni_hwint();
+}
+
+/* ISA irq handler */
+static irqreturn_t sni_isa_irq_handler(int dummy, void *p)
+{
+       int irq;
+
+       irq = i8259_irq();
+       if (unlikely(irq < 0))
+               return IRQ_NONE;
+
+       generic_handle_irq(irq);
+       return IRQ_HANDLED;
+}
+
+struct irqaction sni_isa_irq = {
+       .handler = sni_isa_irq_handler,
+       .name = "ISA",
+       .flags = IRQF_SHARED
+};
+
+/*
+ * On systems with i8259-style interrupt controllers we assume for
+ * driver compatibility reasons interrupts 0 - 15 to be the i8295
+ * interrupts even if the hardware uses a different interrupt numbering.
+ */
+void __init arch_init_irq(void)
+{
+       init_i8259_irqs();                      /* Integrated i8259  */
+       switch (sni_brd_type) {
+       case SNI_BRD_10:
+       case SNI_BRD_10NEW:
+       case SNI_BRD_TOWER_OASIC:
+       case SNI_BRD_MINITOWER:
+               sni_a20r_irq_init();
+               break;
+
+       case SNI_BRD_PCI_TOWER:
+               sni_pcit_irq_init();
+               break;
+
+       case SNI_BRD_PCI_TOWER_CPLUS:
+               sni_pcit_cplus_irq_init();
+               break;
+
+       case SNI_BRD_RM200:
+               sni_rm200_irq_init();
+               break;
+
+       case SNI_BRD_PCI_MTOWER:
+       case SNI_BRD_PCI_DESKTOP:
+       case SNI_BRD_PCI_MTOWER_CPLUS:
+               sni_pcimt_irq_init();
+               break;
+       }
+}