zephyr/arch/xtensa/core/startup/memctl_default.S

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// memctl_default.S - Default startup value for MEMCTL register.
// Copyright (c) 1998-2015 Cadence Design Systems, 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>
#include <xtensa/config/system.h>
// This file just contains this one symbol, used by the reset code.
// It is here rather than in reset-vector.S because we want the symbol
// to be external, so resolution is delayed until link time.
//
// To define your own value to override this default, redefine the
// symbol __memctl_default to the desired value, e.g. -
//
// xt-xcc test.c -g -o test -Wl,--defsym=__memctl_default=0x08080808
//
.global __memctl_default
.weak __memctl_default
.equ __memctl_default, XCHAL_CACHE_MEMCTL_DEFAULT