X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fmips%2Ftx4938%2Fcommon%2Firq_handler.S;fp=arch%2Fmips%2Ftx4938%2Fcommon%2Firq_handler.S;h=1b2f72bac42df36870aeb10a60112031e59e91aa;hb=be1e6109ac94a859551f8e1774eb9a8469fe055c;hp=0000000000000000000000000000000000000000;hpb=bd5a19dd4af64aaf2a1cc38033a2bd21a093a497;p=linux-2.6.git

diff --git a/arch/mips/tx4938/common/irq_handler.S b/arch/mips/tx4938/common/irq_handler.S
new file mode 100644
index 000000000..1b2f72bac
--- /dev/null
+++ b/arch/mips/tx4938/common/irq_handler.S
@@ -0,0 +1,84 @@
+/*
+ * linux/arch/mips/tx4938/common/handler.S
+ *
+ * Primary interrupt handler for tx4938 based systems
+ * Copyright (C) 2000-2001 Toshiba Corporation
+ *
+ * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+#include <asm/tx4938/rbtx4938.h>
+
+
+		.align	5
+		NESTED(tx4938_irq_handler, PT_SIZE, sp)
+		SAVE_ALL
+		CLI
+		.set	at
+
+		mfc0	t0, CP0_CAUSE
+		mfc0	t1, CP0_STATUS
+		and	t0, t1
+
+		andi	t1, t0, STATUSF_IP7	/* cpu timer */
+		bnez	t1, ll_ip7
+
+		/* IP6..IP3 multiplexed -- do not use */
+
+		andi	t1, t0, STATUSF_IP2	/* tx4938 pic */
+		bnez	t1, ll_ip2
+
+		andi	t1, t0, STATUSF_IP1	/* user line 1 */
+		bnez	t1, ll_ip1
+
+		andi	t1, t0, STATUSF_IP0	/* user line 0 */
+		bnez	t1, ll_ip0
+
+		.set	reorder
+
+		nop
+		END(tx4938_irq_handler)
+
+		.align	5
+
+
+ll_ip7:
+		li	a0, TX4938_IRQ_CPU_TIMER
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+
+
+ll_ip2:
+		jal	tx4938_irq_nested
+		nop
+		beqz	v0, goto_spurious_interrupt
+		nop
+		move	a0, v0
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+
+goto_spurious_interrupt:
+		j	ret_from_irq
+
+ll_ip1:
+		li	a0, TX4938_IRQ_USER1
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+
+ll_ip0:
+		li	a0, TX4938_IRQ_USER0
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq