1 files changed, 70 insertions, 0 deletions

diff --git a/arch/mips/mm/cex-oct.S b/arch/mips/mm/cex-oct.S
new file mode 100644
index 000000000000..3db8553fcd34
--- /dev/null
+++ b/arch/mips/mm/cex-oct.S
@@ -0,0 +1,70 @@
+/*
+ * 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) 2006 Cavium Networks
+ * Cache error handler
+ */
+
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+
+/*
+ * Handle cache error. Indicate to the second level handler whether
+ * the exception is recoverable.
+ */
+        LEAF(except_vec2_octeon)
+
+        .set    push
+        .set    mips64r2
+        .set    noreorder
+        .set    noat
+
+
+        /* due to an errata we need to read the COP0 CacheErr (Dcache)
+         * before any cache/DRAM access  */
+
+        rdhwr   k0, $0        /* get core_id */
+        PTR_LA  k1, cache_err_dcache
+        sll     k0, k0, 3
+        PTR_ADDU k1, k0, k1    /* k1 = &cache_err_dcache[core_id] */
+
+        dmfc0   k0, CP0_CACHEERR, 1
+        sd      k0, (k1)
+        dmtc0   $0, CP0_CACHEERR, 1
+
+        /* check whether this is a nested exception */
+        mfc0    k1, CP0_STATUS
+        andi    k1, k1, ST0_EXL
+        beqz    k1, 1f
+         nop
+        j       cache_parity_error_octeon_non_recoverable
+         nop
+
+        /* exception is recoverable */
+1:      j       handle_cache_err
+         nop
+
+        .set    pop
+        END(except_vec2_octeon)
+
+ /* We need to jump to handle_cache_err so that the previous handler
+  * can fit within 0x80 bytes. We also move from 0xFFFFFFFFAXXXXXXX
+  * space (uncached) to the 0xFFFFFFFF8XXXXXXX space (cached).  */
+        LEAF(handle_cache_err)
+        .set    push
+        .set    noreorder
+        .set    noat
+
+        SAVE_ALL
+        KMODE
+        jal     cache_parity_error_octeon_recoverable
+        nop
+        j       ret_from_exception
+        nop
+
+        .set pop
+        END(handle_cache_err)