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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel Corp.
*
* 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.
*/
External(\_SB.EPCS, IntObj) // Enclave Page Cache (EPC) Status
External(\_SB.EMNA, IntObj) // EPC base address
External(\_SB.ELNG, IntObj) // EPC length
Scope(\_SB)
{
// Secure Enclave memory
Device (EPC)
{
Name (_HID, EISAID ("INT0E0C"))
Name (_STR, Unicode ("Enclave Page Cache 1.0"))
Name (_MLS, Package () {
Package (2) { "en", Unicode ("Enclave Page Cache 1.0") }
})
Name (RBUF, ResourceTemplate ()
{
// _MIN, _MAX and _LEN get patched runtime
QWordMemory (
ResourceConsumer, // ResourceUsage
PosDecode, // Decode _DEC
MinNotFixed, // IsMinFixed _MIF
MaxNotFixed, // IsMaxFixed _MAF
NonCacheable, // Cacheable _MEM
ReadWrite, // ReadAndWrite _RW
0, // AddressGranularity _GRA
0, // AddressMinimum _MIN
0, // AddressMaximum _MAX
0, // AddressTranslation _TRA
1, // RangeLength _LEN
, // ResourceSourceIndex
, // ResourceSource
BAR0 // DescriptorName
)
})
Method (_CRS, 0x0, NotSerialized)
{
CreateQwordField (RBUF, ^BAR0._MIN, EMIN)
CreateQwordField (RBUF, ^BAR0._MAX, EMAX)
CreateQwordField (RBUF, ^BAR0._LEN, ELEN)
Store (\_SB.EMNA, EMIN)
Store (\_SB.ELNG, ELEN)
Subtract (Add (\_SB.EMNA, \_SB.ELNG), 1, EMAX)
Return (RBUF)
}
Method (_STA, 0x0, NotSerialized)
{
If (LNotEqual (\_SB.EPCS, 0))
{
Return (0xF)
}
Return (0x0)
}
} // end EPC Device
} // End of Scope(\_SB)
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