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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.
*/
#ifndef ARCH_EARLY_VARIABLES_H
#define ARCH_EARLY_VARIABLES_H
#if defined(__PRE_RAM__) && IS_ENABLED(CONFIG_CACHE_AS_RAM)
asm(".section .car.global_data,\"w\",@nobits");
asm(".previous");
#ifdef __clang__
#define CAR_GLOBAL __attribute__((used,section(".car.global_data")))
#else
#define CAR_GLOBAL __attribute__((used,section(".car.global_data#")))
#endif /* __clang__ */
/* Get the correct pointer for the CAR global variable. */
void *car_get_var_ptr(void *var);
/* Get and update a CAR_GLOBAL pointing elsewhere in car.global_data*/
void *car_sync_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_sync_var(var) \
*(typeof (var) *)car_sync_var_ptr(&(var))
#define car_set_var(var, val) \
do { car_get_var(var) = (val); } while(0)
#else
#define CAR_GLOBAL
static inline void *car_get_var_ptr(void *var) { return var; }
#define car_get_var(var) (var)
#define car_sync_var(var) (var)
#define car_set_var(var, val) do { (var) = (val); } while (0)
#endif
#endif
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