| // memep-enable.S -- Turn on local memory ECC/parity checking |
| // $Id: //depot/rel/Eaglenest/Xtensa/OS/xtos/memep-enable.S#1 $ |
| |
| // 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 |
| |
