| /* |
| * 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/cache.h> |
| #include <grub/misc.h> |
| |
| static grub_int64_t dlinesz; |
| static grub_int64_t ilinesz; |
| |
| /* Prototypes for asm functions. */ |
| void grub_arch_clean_dcache_range (grub_addr_t beg, grub_addr_t end, |
| grub_uint64_t line_size); |
| void grub_arch_invalidate_icache_range (grub_addr_t beg, grub_addr_t end, |
| grub_uint64_t line_size); |
| |
| static void |
| probe_caches (void) |
| { |
| grub_uint64_t cache_type; |
| |
| /* Read Cache Type Register */ |
| asm volatile ("mrs %0, ctr_el0": "=r"(cache_type)); |
| |
| dlinesz = 4 << ((cache_type >> 16) & 0xf); |
| ilinesz = 4 << (cache_type & 0xf); |
| |
| grub_dprintf("cache", "D$ line size: %lld\n", (long long) dlinesz); |
| grub_dprintf("cache", "I$ line size: %lld\n", (long long) ilinesz); |
| } |
| |
| void |
| grub_arch_sync_caches (void *address, grub_size_t len) |
| { |
| grub_uint64_t start, end, max_align; |
| |
| if (dlinesz == 0) |
| probe_caches(); |
| if (dlinesz == 0) |
| grub_fatal ("Unknown cache line size!"); |
| |
| max_align = dlinesz > ilinesz ? dlinesz : ilinesz; |
| |
| start = ALIGN_DOWN ((grub_uint64_t) address, max_align); |
| end = ALIGN_UP ((grub_uint64_t) address + len, max_align); |
| |
| grub_arch_clean_dcache_range (start, end, dlinesz); |
| grub_arch_invalidate_icache_range (start, end, ilinesz); |
| } |