diff options
Diffstat (limited to 'grub-core/kern/arm64/cache_flush.S')
| -rw-r--r-- | grub-core/kern/arm64/cache_flush.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/grub-core/kern/arm64/cache_flush.S b/grub-core/kern/arm64/cache_flush.S new file mode 100644 index 0000000..e064f7e --- /dev/null +++ b/grub-core/kern/arm64/cache_flush.S @@ -0,0 +1,55 @@ +/* + * 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_flush.S" + .text + +/* + * Simple cache maintenance functions + */ + +// x0 - *beg (inclusive) +// x1 - *end (exclusive) +// x2 - line size +FUNCTION(grub_arch_clean_dcache_range) + // Clean data cache for range to point-of-unification +1: cmp x0, x1 + b.ge 2f + dc cvau, x0 // Clean Virtual Address to PoU + add x0, x0, x2 // Next line + b 1b +2: dsb ish + isb + ret + +// x0 - *beg (inclusive) +// x1 - *end (exclusive) +// x2 - line size +FUNCTION(grub_arch_invalidate_icache_range) + // Invalidate instruction cache for range to point-of-unification +1: cmp x0, x1 + b.ge 2f + ic ivau, x0 // Invalidate Virtual Address to PoU + add x0, x0, x2 // Next line + b 1b + // Branch predictor invalidation not needed on AArch64 +2: dsb ish + isb + ret |