diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h new file mode 100644 index 000000000..87459e4e9 --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect-asm.h @@ -0,0 +1,91 @@ +/* + * arch/ubicom32/include/asm/range-protect-asm.h + * Assembly macros for enabling memory protection. + * + * (C) Copyright 2009, Ubicom, Inc. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port is free software: you can redistribute + * it and/or modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, either version 2 of the + * License, or (at your option) any later version. + * + * The Ubicom32 Linux Kernel Port is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ + +#ifndef _ASM_UBICOM32_RANGE_PROTECT_ASM_H +#define _ASM_UBICOM32_RANGE_PROTECT_ASM_H + +#if defined(__ASSEMBLY__) + +#include <asm/thread-asm.h> + +/* + * You should only use the enable/disable ranges when you have the atomic lock, + * if you do not there will be problems. + */ + +/* + * enable_kernel_ranges + * Enable the kernel ranges (disabling protection) for thread, + * where thread == (1 << thread number) + */ +.macro enable_kernel_ranges thread +#ifdef CONFIG_PROTECT_KERNEL + or.4 I_RANGE0_EN, I_RANGE0_EN, \thread /* Enable Range Register */ + or.4 D_RANGE0_EN, D_RANGE0_EN, \thread + or.4 D_RANGE1_EN, D_RANGE1_EN, \thread +#endif +.endm + +/* + * enable_kernel_ranges_for_current + * Enable the kernel ranges (disabling protection) for this thread + */ +.macro enable_kernel_ranges_for_current scratch_reg +#ifdef CONFIG_PROTECT_KERNEL + thread_get_self_mask \scratch_reg + enable_kernel_ranges \scratch_reg +#endif +.endm + +/* + * disable_kernel_ranges + * Disables the kernel ranges (enabling protection) for thread + * where thread == (1 << thread number) + */ +.macro disable_kernel_ranges thread +#ifdef CONFIG_PROTECT_KERNEL + not.4 \thread, \thread + and.4 I_RANGE0_EN, I_RANGE0_EN, \thread /* Disable Range Register */ + and.4 D_RANGE0_EN, D_RANGE0_EN, \thread + and.4 D_RANGE1_EN, D_RANGE1_EN, \thread +#endif +.endm + +/* + * disable_kernel_ranges_for_current + * Disable kernel ranges (enabling protection) for this thread + */ +.macro disable_kernel_ranges_for_current scratch_reg +#ifdef CONFIG_PROTECT_KERNEL + thread_get_self_mask \scratch_reg + disable_kernel_ranges \scratch_reg +#endif +.endm +#endif + +#endif /* _ASM_UBICOM32_RANGE_PROTECT_ASM_H */ |