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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/secureboot/base/header.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2013,2017 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <secureboot/header.H>
#include <sys/mm.h>
#include <sys/mmio.h>
#include <kernel/console.H>
#include <errno.h>
namespace SECUREBOOT
{
Header& baseHeader()
{
return Singleton<Header>::instance();
}
// @TODO RTC 168021 Converge on a single method of reading the secure
// header
void Header::loadSecurely()
{
//@TODO RTC 167581
// When RTC 166848 is available, pull in real header
return;
}
// @TODO RTC 168021 Converge on a single method of reading the secure
// header
void Header::setNonSecurely(
const void* const i_pHeader)
{
// Fatal code bug if already loaded
assert(iv_data == nullptr,"BUG! In setNonSecurely(), "
"a cached header is already present.");
// Fatal code bug if called with nullptr pointer
assert(i_pHeader != nullptr,"BUG! In setNonSecurely(), "
"caller passed a nullptr header.");
iv_data = calloc(1,PAGESIZE);
memcpy(iv_data,i_pHeader,PAGE_SIZE);
}
void Header::getHeader(
const void*& o_pHeader) const
{
// Fatal code bug if queried before loaded
assert(iv_data!=nullptr,"BUG! In getHeader(), "
"header is not present.");
o_pHeader = iv_data;
}
void Header::_calcSecureLoadAddr(
const void*& o_pCode) const
{
//@TODO RTC 167581
// When RTC 166848 is available, pull in real header
// Determine the secure address where the HBB image was loaded by SBE.
// Regardless of whether security is enabled or not, HBB always ends up
// at the secure load address (which corresponds to the HRMOR).
//
// Zero is purposefully not mapped into the VMM tables, so we
// can't use that for the virtual-to-real translation. Since
// this object is in the base (HBB) image, PA = HRMOR | EA, so we can
// use PA - EA to find the HRMOR.
const void* hrmor = reinterpret_cast<const void*>(
mm_virt_to_phys(
const_cast<SECUREBOOT::Header*>(this)) -
reinterpret_cast<uint64_t>(this));
// HRMOR lookup should never fail
assert( reinterpret_cast<uint64_t>(hrmor)
!= static_cast<uint64_t>(-EFAULT));
o_pCode = hrmor;
}
}
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