move sboot to the root directory

[open-ath9k-htc-firmware.git] / sboot / magpie_1_1 / sboot / athos / src / xtos / memep-enable.S

diff --git a/sboot/magpie_1_1/sboot/athos/src/xtos/memep-enable.S b/sboot/magpie_1_1/sboot/athos/src/xtos/memep-enable.S
new file mode 100755 (executable)
index 0000000..6230336
--- /dev/null
+++ b/sboot/magpie_1_1/sboot/athos/src/xtos/memep-enable.S
@@ -0,0 +1,63 @@
+// memep-enable.S  --  Turn on local memory ECC/parity checking
+// $Id: //depot/rel/Cottonwood/Xtensa/OS/xtos/memep-enable.S#3 $
+
+// Copyright (c) 2006-2010 Tensilica Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#include <xtensa/coreasm.h>
+
+
+       /*
+        *  void  _xtos_memep_enable(int flags);
+        *
+        *  Turn on local memory ECC/parity checking, for both
+        *  data access and instruction fetch.
+        *
+        *  For now, flags are ignored.  Caller is expected to pass zero.
+        *
+        *  _xtos_memep_initrams() must have already been called, if necessary,
+        *  to ensure all ECC/parity bits are valid in any local instruction
+        *  or data RAM.  The normal reset vector sequence already takes care
+        *  of initializing any local cache ECC/parity bits.
+        */
+       .text
+       .align  4
+       .global _xtos_memep_enable
+_xtos_memep_enable:
+       abi_entry
+
+#if XCHAL_HAVE_MEM_ECC_PARITY
+
+       // Local Memory ECC/Parity option initialization
+       //
+       //  NOTE:  We turn on exceptions on correctable errors and correct
+       //      them in the memory error handler.
+       movi    a2, MESR_ERRENAB | MESR_DATEXC | MESR_INSEXC
+       wsr     a2, MESR
+       isync
+
+#endif /* XCHAL_HAVE_MEM_ECC_PARITY */
+
+       movi    a2, 0           // successfully turned on what we could
+       abi_return
+
+       .size   _xtos_memep_enable, . - _xtos_memep_enable
+