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/*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#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);
}
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");
}
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, 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);
}
#if ENV_RAMSTAGE
static void recover_sc(void *unused)
{
stage_cache_recover();
}
BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, recover_sc, NULL);
#endif
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