43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* Copyright (c) 2012-2014, Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief IA-32 segment selector header
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*
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* This header contains the IA-32 segment selector defintions. These are
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* extracted into their own file so they can be shared with the host tools.
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*/
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#ifndef _SEGSELECT_H
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#define _SEGSELECT_H
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/*
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* Segment selector macros for the various entries in the GDT. These are
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* actually byte offsets from the start of the entry table
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* (tGdtHeader->pEntries) that are loaded into the appropriate CPU segment
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* register (along with the appropriate T bit and privilege level bits).
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*
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* When referencing a specific GDT descriptor via tGdtHeader->pEntries, use
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* XXX_SEG_SELECTOR/sizeof(tGdtDesc)
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*/
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#define NULL_SEG_SELECTOR 0
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#define KERNEL_CODE_SEG_SELECTOR 0x0008
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#define KERNEL_DATA_SEG_SELECTOR 0x0010
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#endif /* !_SEGSELECT_H */
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