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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#ifndef CPU_X86_CAR_H
#define CPU_X86_CAR_H
#ifdef __PRE_RAM__
#define CAR_GLOBAL __attribute__((section(".car.global_data,\"w\",@nobits#")))
#define CAR_CBMEM __attribute__((section(".car.cbmem_console,\"w\",@nobits#")))
#else
#define CAR_GLOBAL
#define CAR_CBMEM
#endif
#if CONFIG_CAR_MIGRATION && defined(__PRE_RAM__)
#define CAR_MIGRATE_ATTR __attribute__ ((used,section (".car.migrate")))
/* Call migrate_fn_() when CAR globals are migrated. */
#define CAR_MIGRATE(migrate_fn_) \
static void (* const migrate_fn_ ## _ptr)(void) CAR_MIGRATE_ATTR = \
migrate_fn_;
/* Get the correct pointer for the CAR global variable. */
void *car_get_var_ptr(void *var);
/* Get and set a primitive type global variable. */
#define car_get_var(var) \
*(typeof(var) *)car_get_var_ptr(&(var))
#define car_set_var(var, val) \
do { car_get_var(var) = (val); } while(0)
/* Migrate the CAR variables to memory. */
void car_migrate_variables(void);
#else
#define CAR_MIGRATE(migrate_fn_)
static inline void *car_get_var_ptr(void *var) { return var; }
#define car_get_var(var) (var)
#define car_set_var(var, val) do { (var) = (val); } while (0)
static inline void car_migrate_variables(void) { }
#endif
#endif
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