| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2015 Google Inc. |
| * |
| * This program 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; version 2 of the License. |
| * |
| * This program 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. |
| */ |
| |
| #include <arch/early_variables.h> |
| #include <cbmem.h> |
| #include <stage_cache.h> |
| #include <string.h> |
| |
| /* Stage cache uses cbmem. */ |
| void stage_cache_add(int stage_id, const struct prog *stage) |
| { |
| struct stage_cache *meta; |
| void *c; |
| |
| meta = cbmem_add(CBMEM_ID_STAGEx_META + stage_id, sizeof(*meta)); |
| if (meta == NULL) |
| return; |
| meta->load_addr = (uintptr_t)prog_start(stage); |
| meta->entry_addr = (uintptr_t)prog_entry(stage); |
| |
| c = cbmem_add(CBMEM_ID_STAGEx_CACHE + stage_id, prog_size(stage)); |
| if (c == NULL) |
| return; |
| |
| memcpy(c, prog_start(stage), prog_size(stage)); |
| } |
| |
| void stage_cache_load_stage(int stage_id, struct prog *stage) |
| { |
| struct stage_cache *meta; |
| const struct cbmem_entry *e; |
| void *c; |
| size_t size; |
| void *load_addr; |
| |
| prog_set_entry(stage, NULL, NULL); |
| |
| meta = cbmem_find(CBMEM_ID_STAGEx_META + stage_id); |
| if (meta == NULL) |
| return; |
| |
| e = cbmem_entry_find(CBMEM_ID_STAGEx_CACHE + stage_id); |
| |
| if (e == NULL) |
| return; |
| |
| c = cbmem_entry_start(e); |
| size = cbmem_entry_size(e); |
| load_addr = (void *)(uintptr_t)meta->load_addr; |
| |
| memcpy(load_addr, c, size); |
| |
| prog_set_area(stage, load_addr, size); |
| prog_set_entry(stage, (void *)(uintptr_t)meta->entry_addr, NULL); |
| } |