aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/philips/pnx8550/common/mipsIRQ.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/philips/pnx8550/common/mipsIRQ.S')
-rw-r--r--arch/mips/philips/pnx8550/common/mipsIRQ.S76
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/mips/philips/pnx8550/common/mipsIRQ.S b/arch/mips/philips/pnx8550/common/mipsIRQ.S
new file mode 100644
index 00000000000..338bffda3fa
--- /dev/null
+++ b/arch/mips/philips/pnx8550/common/mipsIRQ.S
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2002 Philips, Inc. All rights.
+ * Copyright (c) 2002 Red Hat, Inc. All rights.
+ *
+ * This software may be freely redistributed under the terms of the
+ * GNU General Public License.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Based upon arch/mips/galileo-boards/ev64240/int-handler.S
+ *
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+/*
+ * cp0_irqdispatch
+ *
+ * Code to handle in-core interrupt exception.
+ */
+
+ .align 5
+ .set reorder
+ .set noat
+ NESTED(cp0_irqdispatch, PT_SIZE, sp)
+ SAVE_ALL
+ CLI
+ .set at
+ mfc0 t0,CP0_CAUSE
+ mfc0 t2,CP0_STATUS
+
+ and t0,t2
+
+ andi t1,t0,STATUSF_IP2 /* int0 hardware line */
+ bnez t1,ll_hw0_irq
+ nop
+
+ andi t1,t0,STATUSF_IP7 /* int5 hardware line */
+ bnez t1,ll_timer_irq
+ nop
+
+ /* wrong alarm or masked ... */
+
+ j spurious_interrupt
+ nop
+ END(cp0_irqdispatch)
+
+ .align 5
+ .set reorder
+ll_hw0_irq:
+ li a0,2
+ move a1,sp
+ jal hw0_irqdispatch
+ nop
+ j ret_from_irq
+ nop
+
+ .align 5
+ .set reorder
+ll_timer_irq:
+ mfc0 t3,CP0_CONFIG,7
+ andi t4,t3,0x01c0
+ beqz t4,ll_timer_out
+ nop
+ li a0,7
+ move a1,sp
+ jal timer_irqdispatch
+ nop
+
+ll_timer_out: j ret_from_irq
+ nop