| 1 | /* |
| 2 | * arch/ubicom32/include/asm/range-protect.h |
| 3 | * Assembly macros declared in C for enabling memory protection. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | |
| 29 | #ifndef _ASM_UBICOM32_RANGE_PROTECT_H |
| 30 | #define _ASM_UBICOM32_RANGE_PROTECT_H |
| 31 | |
| 32 | #if !defined(__ASSEMBLY__) |
| 33 | #include <asm/thread.h> |
| 34 | /* |
| 35 | * The following macros should be the identical to the ones in |
| 36 | * range-protect-asm.h |
| 37 | * |
| 38 | * You should only use the enable/disable ranges when you have the atomic lock, |
| 39 | * if you do not there will be problems. |
| 40 | */ |
| 41 | |
| 42 | /* |
| 43 | * enable_kernel_ranges |
| 44 | * Enable the kernel ranges (disabling protection) for thread, |
| 45 | * where thread == (1 << thread number) |
| 46 | */ |
| 47 | asm ( |
| 48 | ".macro enable_kernel_ranges thread \n\t" |
| 49 | #ifdef CONFIG_PROTECT_KERNEL |
| 50 | " or.4 I_RANGE0_EN, I_RANGE0_EN, \\thread \n\t" /* Enable Range Register */ |
| 51 | " or.4 D_RANGE0_EN, D_RANGE0_EN, \\thread \n\t" |
| 52 | " or.4 D_RANGE1_EN, D_RANGE1_EN, \\thread \n\t" |
| 53 | #endif |
| 54 | ".endm \n\t" |
| 55 | ); |
| 56 | |
| 57 | #else /* __ASSEMBLY__ */ |
| 58 | |
| 59 | #include <asm/range-protect-asm.h> |
| 60 | |
| 61 | #endif |
| 62 | #endif /* _ASM_UBICOM32_RANGE_PROTECT_H */ |
| 63 | |
