| /* 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. */ |
