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- /* cache.S - Flush the processor cache for a specific region. */
- /*
- * GRUB -- GRand Unified Bootloader
- * Copyright (C) 2004,2007,2010 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/>.
- */
- #undef CACHE_LINE_BYTES
- #define CACHE_LINE_BYTES 32
- /* `address' may not be CACHE_LINE_BYTES-aligned. */
- andi. 6, 3, CACHE_LINE_BYTES - 1 /* Find the misalignment. */
- add 4, 4, 6 /* Adjust `size' to compensate. */
- /* Force the dcache lines to memory. */
- li 5, 0
- 1: dcbst 5, 3
- addi 5, 5, CACHE_LINE_BYTES
- cmpw 5, 4
- blt 1b
- sync /* Force all dcbsts to complete. */
- /* Invalidate the icache lines. */
- li 5, 0
- 1: icbi 5, 3
- addi 5, 5, CACHE_LINE_BYTES
- cmpw 5, 4
- blt 1b
- sync /* Force all icbis to complete. */
- isync /* Discard partially executed instructions that were
- loaded from the invalid icache. */
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