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# Copyright (c) 2020 ARM Limited
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#
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# to a hardware implementation of the functionality of the software
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# met: redistributions of source code must retain the above copyright
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# redistributions in binary form must reproduce the above copyright
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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from m5.objects.Device import BasicPioDevice
from m5.objects.Doorbell import Doorbell
from m5.params import *
from m5.proxy import *
from m5.util.fdthelper import *
class MhuDoorbell(Doorbell):
type = 'MhuDoorbell'
abstract = True
cxx_header = "dev/arm/css/mhu.hh"
class Scp2ApDoorbell(MhuDoorbell):
type = 'Scp2ApDoorbell'
cxx_header = "dev/arm/css/mhu.hh"
interrupt = Param.ArmInterruptPin("Interrupt Pin")
class Ap2ScpDoorbell(MhuDoorbell):
type = 'Ap2ScpDoorbell'
cxx_header = "dev/arm/css/mhu.hh"
# Message Handling Unit
class MHU(BasicPioDevice):
type = 'MHU'
cxx_header = "dev/arm/css/mhu.hh"
pio_size = Param.Unsigned(0x1000, "MHU pio size")
lowp_scp2ap = Param.Scp2ApDoorbell(
"Low Priority doorbell channel for communications "
"from the System Control Processor (SCP) to the "
"Application Processor (AP)")
highp_scp2ap = Param.Scp2ApDoorbell(
"High Priority doorbell channel for communications "
"from the System Control Processor (SCP) to the "
"Application Processor (AP)")
sec_scp2ap = Param.Scp2ApDoorbell(
"Secure doorbell channel for communications "
"from the System Control Processor (SCP) to the "
"Application Processor (AP)")
lowp_ap2scp = Param.Ap2ScpDoorbell(
"Low Priority doorbell channel for communications "
"from the Application Processor (AP) to the "
"System Control Processor (SCP)")
highp_ap2scp = Param.Ap2ScpDoorbell(
"High Priority doorbell channel for communications "
"from the Application Processor (AP) to the "
"System Control Processor (SCP)")
sec_ap2scp = Param.Ap2ScpDoorbell(
"Secure doorbell channel for communications "
"from the Application Processor (AP) to the "
"System Control Processor (SCP)")
scp = Param.Scp(Parent.any, "System Control Processor")
def generateDeviceTree(self, state):
node = FdtNode("mailbox@%x" % int(self.pio_addr))
node.appendCompatible(["arm,mhu", "arm,primecell"])
node.append(FdtPropertyWords("reg",
state.addrCells(self.pio_addr) +
state.sizeCells(self.pio_size) ))
node.append(FdtPropertyWords("#mbox-cells", 1))
node.append(FdtPropertyWords("interrupts", [
0, int(self.lowp_scp2ap.interrupt.num) - 32, 1,
0, int(self.highp_scp2ap.interrupt.num) - 32, 1,
0, int(self.sec_scp2ap.interrupt.num) - 32, 1,
]))
realview = self._parent.unproxy(self)
node.append(FdtPropertyWords("clocks",
[state.phandle(realview.mcc.osc_peripheral),
state.phandle(realview.dcc.osc_smb)]))
node.append(FdtPropertyStrings("clock-names", ["apb_pclk"]))
node.appendPhandle(self)
yield node