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-rw-r--r--arch/mips/ite-boards/generic/int-handler.S63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/mips/ite-boards/generic/int-handler.S b/arch/mips/ite-boards/generic/int-handler.S
new file mode 100644
index 000000000000..d190d8add9cb
--- /dev/null
+++ b/arch/mips/ite-boards/generic/int-handler.S
@@ -0,0 +1,63 @@
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+ .text
+ .set macro
+ .set noat
+ .align 5
+
+NESTED(it8172_IRQ, PT_SIZE, sp)
+ SAVE_ALL
+ CLI # Important: mark KERNEL mode !
+
+ /* We're working with 'reorder' set at this point. */
+ /*
+ * Get pending interrupts
+ */
+
+ mfc0 t0,CP0_CAUSE # get pending interrupts
+ mfc0 t1,CP0_STATUS # get enabled interrupts
+ and t0,t1 # isolate allowed ones
+
+ andi t0,0xff00 # isolate pending bits
+ beqz t0, 3f # spurious interrupt
+
+ andi a0, t0, CAUSEF_IP7
+ beq a0, zero, 1f
+
+ li a0, 127 # MIPS_CPU_TIMER_IRQ = (NR_IRQS-1)
+ move a1, sp
+ jal ll_timer_interrupt
+ j ret_from_irq
+ nop
+
+1:
+ andi a0, t0, CAUSEF_IP2 # the only int we expect at this time
+ beq a0, zero, 3f
+ move a0,sp
+ jal it8172_hw0_irqdispatch
+
+ mfc0 t0,CP0_STATUS # disable interrupts
+ ori t0,1
+ xori t0,1
+ mtc0 t0,CP0_STATUS
+ nop
+ nop
+ nop
+
+ la a1, ret_from_irq
+ jr a1
+ nop
+
+3:
+ move a0, sp
+ jal mips_spurious_interrupt
+ nop
+ la a1, ret_from_irq
+ jr a1
+ nop
+
+END(it8172_IRQ)
+