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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (C) 2002 Benno Rice.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_SR_H_
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#define _MACHINE_SR_H_
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/*
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* Bit definitions for segment registers.
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*
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* PowerPC Microprocessor Family: The Programming Environments for 32-bit
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* Microprocessors, section 2.3.5
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*/
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#define SR_TYPE 0x80000000 /* Type selector */
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#define SR_KS 0x40000000 /* Supervisor-state protection key */
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#define SR_KP 0x20000000 /* User-state protection key */
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#define SR_N 0x10000000 /* No-execute protection */
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#define SR_VSID_MASK 0x00ffffff /* Virtual Segment ID mask */
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/* Kernel segment register usage */
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#define USER_SR 12
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#define KERNEL_SR 13
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#define KERNEL2_SR 14
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#define KERNEL3_SR 15
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#define KERNEL_VSIDBITS 0xfffffUL
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#define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR)
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#define KERNEL2_SEGMENT (0xfffff0 + KERNEL2_SR)
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#define EMPTY_SEGMENT 0xfffff0
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#ifdef __powerpc64__
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#define USER_ADDR 0xc00ffffff0000000UL
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#else
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#define USER_ADDR ((uintptr_t)USER_SR << ADDR_SR_SHFT)
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#endif
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#define SEGMENT_LENGTH 0x10000000UL
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#define SEGMENT_INVMASK 0x0fffffffUL
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#define SEGMENT_MASK ~SEGMENT_INVMASK
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#endif /* !_MACHINE_SR_H_ */
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