| /* |
| * 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 <bootstate.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <imd.h> |
| #include <rules.h> |
| #include <stage_cache.h> |
| #include <string.h> |
| |
| static struct imd imd_stage_cache CAR_GLOBAL = { }; |
| |
| static inline struct imd *imd_get(void) |
| { |
| return car_get_var_ptr(&imd_stage_cache); |
| } |
| |
| static void stage_cache_create_empty(void) |
| { |
| struct imd *imd; |
| void *base; |
| size_t size; |
| |
| imd = imd_get(); |
| stage_cache_external_region(&base, &size); |
| imd_handle_init(imd, (void *)(size + (uintptr_t)base)); |
| |
| printk(BIOS_DEBUG, "External stage cache:\n"); |
| imd_create_tiered_empty(imd, 4096, 4096, 1024, 32); |
| if (imd_limit_size(imd, size)) |
| printk(BIOS_DEBUG, "Could not limit stage cache size.\n"); |
| } |
| |
| static void stage_cache_recover(void) |
| { |
| struct imd *imd; |
| void *base; |
| size_t size; |
| |
| imd = imd_get(); |
| stage_cache_external_region(&base, &size); |
| imd_handle_init(imd, (void *)(size + (uintptr_t)base)); |
| if (imd_recover(imd)) |
| printk(BIOS_DEBUG, "Unable to recover external stage cache.\n"); |
| } |
| |
| void stage_cache_add(int stage_id, const struct prog *stage) |
| { |
| struct imd *imd; |
| const struct imd_entry *e; |
| struct stage_cache *meta; |
| void *c; |
| |
| imd = imd_get(); |
| e = imd_entry_add(imd, CBMEM_ID_STAGEx_META + stage_id, sizeof(*meta)); |
| |
| if (e == NULL) |
| return; |
| |
| meta = imd_entry_at(imd, e); |
| |
| meta->load_addr = (uintptr_t)prog_start(stage); |
| meta->entry_addr = (uintptr_t)prog_entry(stage); |
| |
| e = imd_entry_add(imd, CBMEM_ID_STAGEx_CACHE + stage_id, |
| prog_size(stage)); |
| |
| if (e == NULL) |
| return; |
| |
| c = imd_entry_at(imd, e); |
| |
| memcpy(c, prog_start(stage), prog_size(stage)); |
| } |
| |
| void stage_cache_load_stage(int stage_id, struct prog *stage) |
| { |
| struct imd *imd; |
| struct stage_cache *meta; |
| const struct imd_entry *e; |
| void *c; |
| size_t size; |
| |
| imd = imd_get(); |
| e = imd_entry_find(imd, CBMEM_ID_STAGEx_META + stage_id); |
| if (e == NULL) |
| return; |
| |
| meta = imd_entry_at(imd, e); |
| |
| e = imd_entry_find(imd, CBMEM_ID_STAGEx_CACHE + stage_id); |
| |
| if (e == NULL) |
| return; |
| |
| c = imd_entry_at(imd, e); |
| size = imd_entry_size(imd, e); |
| |
| memcpy((void *)(uintptr_t)meta->load_addr, c, size); |
| |
| prog_set_area(stage, (void *)(uintptr_t)meta->load_addr, size); |
| prog_set_entry(stage, (void *)(uintptr_t)meta->entry_addr, NULL); |
| } |
| |
| static void stage_cache_setup(int is_recovery) |
| { |
| if (is_recovery) |
| stage_cache_recover(); |
| else |
| stage_cache_create_empty(); |
| } |
| |
| ROMSTAGE_CBMEM_INIT_HOOK(stage_cache_setup) |
| RAMSTAGE_CBMEM_INIT_HOOK(stage_cache_setup) |