init android origin source code

1 files changed, 42 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/arch/mips/mm/cex-gen.S b/ANDROID_3.4.5/arch/mips/mm/cex-gen.S
new file mode 100644
index 00000000..e743622f
--- /dev/null
+++ b/ANDROID_3.4.5/arch/mips/mm/cex-gen.S
@@ -0,0 +1,42 @@
+/*
+ * 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) 1995 - 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ *
+ * Cache error handler
+ */
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+
+/*
+ * Game over.  Go to the button.  Press gently.  Swear where allowed by
+ * legislation.
+ */
+	LEAF(except_vec2_generic)
+	.set	noreorder
+	.set	noat
+	.set    mips0
+	/*
+	 * This is a very bad place to be.  Our cache error
+	 * detection has triggered.  If we have write-back data
+	 * in the cache, we may not be able to recover.  As a
+	 * first-order desperate measure, turn off KSEG0 cacheing.
+	 */
+	mfc0	k0,CP0_CONFIG
+	li	k1,~CONF_CM_CMASK
+	and	k0,k0,k1
+	ori	k0,k0,CONF_CM_UNCACHED
+	mtc0	k0,CP0_CONFIG
+	/* Give it a few cycles to sink in... */
+	nop
+	nop
+	nop
+
+	j	cache_parity_error
+	nop
+	END(except_vec2_generic)