diff options
Diffstat (limited to 'grub-core/kern/arm/cache_armv6.S')
| -rw-r--r-- | grub-core/kern/arm/cache_armv6.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/grub-core/kern/arm/cache_armv6.S b/grub-core/kern/arm/cache_armv6.S new file mode 100644 index 0000000..dfaded0 --- /dev/null +++ b/grub-core/kern/arm/cache_armv6.S @@ -0,0 +1,72 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2013 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/symbol.h> + + .file "cache_armv6.S" + .text + .syntax unified + .arm + +# define DMB mcr p15, 0, r0, c7, c10, 5 +# define DSB mcr p15, 0, r0, c7, c10, 4 +# define ISB mcr p15, 0, r0, c7, c5, 4 +#define ARMV6 1 + +clean_invalidate_dcache: + mcr p15, 0, r0, c7, c14, 0 @ Clean/Invalidate D-cache + bx lr + +#include "cache.S" + +FUNCTION(grub_arm_main_id) + mrc p15, 0, r0, c0, c0, 0 + bx lr + +FUNCTION(grub_arm_cache_type) + mrc p15, 0, r0, c0, c0, 1 + bx lr + +FUNCTION(grub_arm_clear_mmu_v6) + mov r0, #0 + mcr p15, 0, r0, c2, c0, 2 + bx lr + +FUNCTION(grub_arm_enable_mmu) + mcr p15, 0, r0, c2, c0, 0 + + mvn r0, #0 + mcr p15, 0, r0, c3, c0, 0 + + mrc p15, 0, r0, c1, c0, 0 + bic r0, r0, #(1 << 23) + mcr p15, 0, r0, c1, c0, 0 + + mrc p15, 0, r0, c1, c0, 0 + orr r0, r0, #(1 << 0) + mcr p15, 0, r0, c1, c0, 0 + + mrc p15, 0, r0, c1, c0, 0 + orr r0, r0, #(1 << 2) + mcr p15, 0, r0, c1, c0, 0 + + mrc p15, 0, r0, c1, c0, 0 + orr r0, r0, #(1 << 12) + mcr p15, 0, r0, c1, c0, 0 + + bx lr |