patch-2.4.20 linux-2.4.20/arch/mips/sgi-ip32/ip32-irq-glue.S
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- Lines: 88
- Date:
Thu Nov 28 15:53:10 2002
- Orig file:
linux-2.4.19/arch/mips/sgi-ip32/ip32-irq-glue.S
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/arch/mips/sgi-ip32/ip32-irq-glue.S linux-2.4.20/arch/mips/sgi-ip32/ip32-irq-glue.S
@@ -0,0 +1,87 @@
+/*
+ * Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000 Harald Koerfgen
+ * Copyright (C) 2001 Keith M Wesolowski
+ */
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+#include <asm/addrspace.h>
+#include <asm/ip32/ip32_ints.h>
+
+ .text
+ .set noreorder
+ .set noat
+ .align 5
+ NESTED(ip32_handle_int, PT_SIZE, ra)
+ .set noat
+ SAVE_ALL
+ CLI # TEST: interrupts should be off
+ .set at
+ .set noreorder
+
+ mfc0 s0,CP0_CAUSE
+
+ andi t1, s0, IE_IRQ0
+ bnez t1, handle_irq0
+ andi t1, s0, IE_IRQ1
+ bnez t1, handle_irq1
+ andi t1, s0, IE_IRQ2
+ bnez t1, handle_irq2
+ andi t1, s0, IE_IRQ3
+ bnez t1, handle_irq3
+ andi t1, s0, IE_IRQ4
+ bnez t1, handle_irq4
+ andi t1, s0, IE_IRQ5
+ bnez t1, handle_irq5
+ nop
+
+ /* Either someone has triggered the "software interrupts"
+ * or we lost an interrupt somehow. Ignore it.
+ */
+ j ret_from_irq
+ nop
+
+handle_irq0:
+ jal ip32_irq0
+ move a0, sp
+ j ret_from_irq
+ nop
+
+handle_irq1:
+ jal ip32_irq1
+ move a0, sp
+ j ret_from_irq
+ nop
+
+handle_irq2:
+ jal ip32_irq2
+ move a0, sp
+ j ret_from_irq
+ nop
+
+handle_irq3:
+ jal ip32_irq3
+ move a0, sp
+ j ret_from_irq
+ nop
+
+handle_irq4:
+ jal ip32_irq4
+ move a0, sp
+ j ret_from_irq
+ nop
+
+handle_irq5:
+ jal ip32_irq5
+ move a0, sp
+ j ret_from_irq
+ nop
+
+ END(ip32_handle_int)
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