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Diffstat (limited to 'arch/mips/gt64120/ev64120/int-handler.S')
-rw-r--r--arch/mips/gt64120/ev64120/int-handler.S113
1 files changed, 113 insertions, 0 deletions
diff --git a/arch/mips/gt64120/ev64120/int-handler.S b/arch/mips/gt64120/ev64120/int-handler.S
new file mode 100644
index 00000000000..752435faf2d
--- /dev/null
+++ b/arch/mips/gt64120/ev64120/int-handler.S
@@ -0,0 +1,113 @@
+/*
+ * int-handler.S
+ *
+ * Based on the cobalt handler.
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+/*
+ * galileo_handle_int -
+ * We check for the timer first, then check PCI ints A and D.
+ * Then check for serial IRQ and fall through.
+ */
+ .align 5
+ .set reorder
+ .set noat
+ NESTED(galileo_handle_int, PT_SIZE, sp)
+ SAVE_ALL
+ CLI
+ .set at
+ mfc0 t0,CP0_CAUSE
+ mfc0 t2,CP0_STATUS
+
+ and t0,t2
+
+ andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */
+ bnez t1,ll_gt64120_irq
+ andi t1,t0,STATUSF_IP2 /* int0 hardware line */
+ bnez t1,ll_pci_intA
+ andi t1,t0,STATUSF_IP5 /* int3 hardware line */
+ bnez t1,ll_pci_intD
+ andi t1,t0,STATUSF_IP6 /* int4 hardware line */
+ bnez t1,ll_serial_irq
+ andi t1,t0,STATUSF_IP7 /* compare int */
+ bnez t1,ll_compare_irq
+ nop
+
+ /* wrong alarm or masked ... */
+ j spurious_interrupt
+ nop
+ END(galileo_handle_int)
+
+
+ .align 5
+ .set reorder
+ll_gt64120_irq:
+ li a0,4
+ move a1,sp
+ jal do_IRQ
+ nop
+ j ret_from_irq
+ nop
+
+ .align 5
+ .set reorder
+ll_compare_irq:
+ li a0,7
+ move a1,sp
+ jal do_IRQ
+ nop
+ j ret_from_irq
+ nop
+
+ .align 5
+ .set reorder
+ll_pci_intA:
+ move a0,sp
+ jal pci_intA
+ nop
+ j ret_from_irq
+ nop
+
+#if 0
+ .align 5
+ .set reorder
+ll_pci_intB:
+ move a0,sp
+ jal pci_intB
+ nop
+ j ret_from_irq
+ nop
+
+ .align 5
+ .set reorder
+ll_pci_intC:
+ move a0,sp
+ jal pci_intC
+ nop
+ j ret_from_irq
+ nop
+#endif
+
+ .align 5
+ .set reorder
+ll_pci_intD:
+ move a0,sp
+ jal pci_intD
+ nop
+ j ret_from_irq
+ nop
+
+ .align 5
+ .set reorder
+ll_serial_irq:
+ li a0,6
+ move a1,sp
+ jal do_IRQ
+ nop
+ j ret_from_irq
+ nop