From c6588c5af94e568bddd8111c3fca736f464042cf Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Fri, 15 May 2015 13:15:34 -0500 Subject: coreboot: introduce boot_device The boot_device is a region_device that represents the device from which coreboot retrieves and boots its stages. The existing cbfs implementations use the boot_device as the intermediary for accessing the CBFS region. Also, there's currently only support for a read-only view of the boot_device. i.e. one cannot write to the boot_device using this view. However, a writable boot_device could be added in the future. Change-Id: Ic0da796ab161b8025c90631be3423ba6473ad31c Signed-off-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/10216 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand Reviewed-by: Patrick Georgi --- src/lib/boot_device.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/lib/boot_device.c (limited to 'src/lib/boot_device.c') diff --git a/src/lib/boot_device.c b/src/lib/boot_device.c new file mode 100644 index 0000000000..e0353fc1ab --- /dev/null +++ b/src/lib/boot_device.c @@ -0,0 +1,38 @@ +/* + * 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 + +void __attribute__((weak)) boot_device_init(void) +{ + /* Provide weak do-nothing init. */ +} + +int boot_device_ro_subregion(const struct region *sub, + struct region_device *subrd) +{ + const struct region_device *boot_dev; + + boot_dev = boot_device_ro(); + + if (boot_dev == NULL) + return -1; + + return rdev_chain(subrd, boot_dev, region_offset(sub), region_sz(sub)); +} -- cgit v1.2.3