From decd062875c1e33d4c9203c2edc0652792a46e73 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Fri, 15 Dec 2017 12:26:40 -0700 Subject: drivers/mrc_cache: move mrc_cache support to drivers There's nothing intel-specific about the current mrc_cache support. It's logic manages saving non-volatile areas into the boot media. Therefore, expose it to the rest of the system for any and all to use. BUG=b:69614064 Change-Id: I3b331c82a102f88912a3e10507a70207fb20aecc Signed-off-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/22901 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/include/mrc_cache.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 src/include/mrc_cache.h (limited to 'src/include') diff --git a/src/include/mrc_cache.h b/src/include/mrc_cache.h new file mode 100644 index 0000000000..4511fc3016 --- /dev/null +++ b/src/include/mrc_cache.h @@ -0,0 +1,43 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 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. + */ + +#ifndef _COMMON_MRC_CACHE_H_ +#define _COMMON_MRC_CACHE_H_ + +#include +#include + +enum { + MRC_TRAINING_DATA, + MRC_VARIABLE_DATA, +}; + +/* + * It's up to the caller to decide when to retrieve and stash data. There is + * differentiation on recovery mode CONFIG_HAS_RECOVERY_MRC_CACHE, but that's + * only for locating where to retrieve and save the data. If a platform doesn't + * want to update the data then it shouldn't stash the data for saving. + * Similarly, if the platform doesn't need the data for booting because of a + * policy don't request the data. + */ + +/* Get and stash data for saving provided the type passed in. The functions + * return < 0 on error, 0 on success. */ +int mrc_cache_get_current(int type, uint32_t version, + struct region_device *rdev); +int mrc_cache_stash_data(int type, uint32_t version, const void *data, + size_t size); + +#endif /* _COMMON_MRC_CACHE_H_ */ -- cgit v1.2.3