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c6170286ca
Use GS base regsiter to store reference to CPU private data. Then we can easily refer to private CPU data using the GS segment. Required for SMP support. Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
44 lines
1.7 KiB
C
44 lines
1.7 KiB
C
/****************************************************************************
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* arch/x86_64/src/common/x86_64_getintstack.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include "x86_64_internal.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_get_intstackbase
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****************************************************************************/
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#if CONFIG_ARCH_INTERRUPTSTACK > 3
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uintptr_t up_get_intstackbase(int cpu)
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{
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return (uintptr_t)(g_intstackalloc + (cpu * IRQ_STACK_SIZE));
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}
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#endif
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