6d4c1f5f43
Add API that should be implemented by the boot media drivers for write-protecting a subregion. Change-Id: I4c9376e2c2c7a4852f13c65824c6cd64a1c6ac0a Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com> Reviewed-on: https://review.coreboot.org/c/28724 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2015 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <boot_device.h>
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void __weak boot_device_init(void)
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{
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/* Provide weak do-nothing init. */
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}
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int __weak boot_device_wp_region(struct region_device *rd,
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const enum bootdev_prot_type type)
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{
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/* return a failure, make aware WP is not implemented */
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return -1;
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}
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static int boot_device_subregion(const struct region *sub,
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struct region_device *subrd,
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const struct region_device *parent)
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{
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if (parent == NULL)
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return -1;
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return rdev_chain(subrd, parent, region_offset(sub), region_sz(sub));
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}
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int boot_device_ro_subregion(const struct region *sub,
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struct region_device *subrd)
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{
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/* Ensure boot device has been initialized at least once. */
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boot_device_init();
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return boot_device_subregion(sub, subrd, boot_device_ro());
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}
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int boot_device_rw_subregion(const struct region *sub,
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struct region_device *subrd)
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{
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/* Ensure boot device has been initialized at least once. */
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boot_device_init();
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return boot_device_subregion(sub, subrd, boot_device_rw());
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}
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