This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / mips / tx4938 / common / irq_handler.S

diff --git a/arch/mips/tx4938/common/irq_handler.S b/arch/mips/tx4938/common/irq_handler.S
new file mode 100644 (file)
index 0000000..1b2f72b
--- /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