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git://projects.qi-hardware.com/openwrt-xburst.git
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1a29ef8e97
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* arch/ubicom32/include/asm/range-protect-asm.h
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* Assembly macros for enabling memory protection.
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*
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* (C) Copyright 2009, Ubicom, Inc.
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*
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* Ubicom32 implementation derived from (with many thanks):
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* arch/m68knommu
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* arch/blackfin
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* arch/parisc
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*/
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#ifndef _ASM_UBICOM32_RANGE_PROTECT_ASM_H
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#define _ASM_UBICOM32_RANGE_PROTECT_ASM_H
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#if defined(__ASSEMBLY__)
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#include <asm/thread-asm.h>
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/*
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* You should only use the enable/disable ranges when you have the atomic lock,
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* if you do not there will be problems.
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*/
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/*
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* enable_kernel_ranges
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* Enable the kernel ranges (disabling protection) for thread,
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* where thread == (1 << thread number)
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*/
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.macro enable_kernel_ranges thread
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#ifdef CONFIG_PROTECT_KERNEL
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or.4 I_RANGE0_EN, I_RANGE0_EN, \thread /* Enable Range Register */
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or.4 D_RANGE0_EN, D_RANGE0_EN, \thread
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or.4 D_RANGE1_EN, D_RANGE1_EN, \thread
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#endif
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.endm
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/*
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* enable_kernel_ranges_for_current
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* Enable the kernel ranges (disabling protection) for this thread
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*/
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.macro enable_kernel_ranges_for_current scratch_reg
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#ifdef CONFIG_PROTECT_KERNEL
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thread_get_self_mask \scratch_reg
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enable_kernel_ranges \scratch_reg
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#endif
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.endm
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/*
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* disable_kernel_ranges
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* Disables the kernel ranges (enabling protection) for thread
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* where thread == (1 << thread number)
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*/
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.macro disable_kernel_ranges thread
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#ifdef CONFIG_PROTECT_KERNEL
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not.4 \thread, \thread
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and.4 I_RANGE0_EN, I_RANGE0_EN, \thread /* Disable Range Register */
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and.4 D_RANGE0_EN, D_RANGE0_EN, \thread
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and.4 D_RANGE1_EN, D_RANGE1_EN, \thread
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#endif
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.endm
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/*
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* disable_kernel_ranges_for_current
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* Disable kernel ranges (enabling protection) for this thread
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*/
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.macro disable_kernel_ranges_for_current scratch_reg
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#ifdef CONFIG_PROTECT_KERNEL
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thread_get_self_mask \scratch_reg
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disable_kernel_ranges \scratch_reg
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#endif
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.endm
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#endif
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#endif /* _ASM_UBICOM32_RANGE_PROTECT_ASM_H */
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