Gic.py revision 14226:c9f82df8d530 
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36# Authors: Andreas Sandberg
37
38from m5.params import *
39from m5.proxy import *
40from m5.util.fdthelper import *
41from m5.SimObject import SimObject
42
43from m5.objects.Device import PioDevice, BasicPioDevice
44from m5.objects.Platform import Platform
45
46class BaseGic(PioDevice):
47    type = 'BaseGic'
48    abstract = True
49    cxx_header = "dev/arm/base_gic.hh"
50
51    # Used for DTB autogeneration
52    _state = FdtState(addr_cells=0, interrupt_cells=3)
53
54    platform = Param.Platform(Parent.any, "Platform this device is part of.")
55
56    gicd_iidr = Param.UInt32(0,
57        "Distributor Implementer Identification Register")
58    gicd_pidr = Param.UInt32(0,
59        "Peripheral Identification Register")
60    gicc_iidr = Param.UInt32(0,
61        "CPU Interface Identification Register")
62    gicv_iidr = Param.UInt32(0,
63        "VM CPU Interface Identification Register")
64
65    def interruptCells(self, int_type, int_num, int_flag):
66        """
67        Interupt cells generation helper:
68        Following specifications described in
69
70        Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt
71        """
72        assert self._state.interrupt_cells == 3
73        return [ int_type, int_num, int_flag ]
74
75class ArmInterruptPin(SimObject):
76    type = 'ArmInterruptPin'
77    cxx_header = "dev/arm/base_gic.hh"
78    cxx_class = "ArmInterruptPinGen"
79    abstract = True
80
81    platform = Param.Platform(Parent.any, "Platform with interrupt controller")
82    num = Param.UInt32("Interrupt number in GIC")
83
84class ArmSPI(ArmInterruptPin):
85    type = 'ArmSPI'
86    cxx_header = "dev/arm/base_gic.hh"
87    cxx_class = "ArmSPIGen"
88
89class ArmPPI(ArmInterruptPin):
90    type = 'ArmPPI'
91    cxx_header = "dev/arm/base_gic.hh"
92    cxx_class = "ArmPPIGen"
93
94class GicV2(BaseGic):
95    type = 'GicV2'
96    cxx_header = "dev/arm/gic_v2.hh"
97
98    dist_addr = Param.Addr("Address for distributor")
99    cpu_addr = Param.Addr("Address for cpu")
100    cpu_size = Param.Addr(0x2000, "Size of cpu register bank")
101    dist_pio_delay = Param.Latency('10ns', "Delay for PIO r/w to distributor")
102    cpu_pio_delay = Param.Latency('10ns', "Delay for PIO r/w to cpu interface")
103    int_latency = Param.Latency('10ns', "Delay for interrupt to get to CPU")
104    it_lines = Param.UInt32(128, "Number of interrupt lines supported (max = 1020)")
105    gem5_extensions = Param.Bool(False, "Enable gem5 extensions")
106
107class Gic400(GicV2):
108    """
109    As defined in:
110    "ARM Generic Interrupt Controller Architecture" version 2.0
111    "CoreLink GIC-400 Generic Interrupt Controller" revision r0p1
112    """
113    gicd_pidr = 0x002bb490
114    gicd_iidr = 0x0200143B
115    gicc_iidr = 0x0202143B
116
117    # gicv_iidr same as gicc_idr
118    gicv_iidr = gicc_iidr
119
120class Gicv2mFrame(SimObject):
121    type = 'Gicv2mFrame'
122    cxx_header = "dev/arm/gic_v2m.hh"
123    spi_base = Param.UInt32(0x0, "Frame SPI base number");
124    spi_len = Param.UInt32(0x0, "Frame SPI total number");
125    addr = Param.Addr("Address for frame PIO")
126
127class Gicv2m(PioDevice):
128    type = 'Gicv2m'
129    cxx_header = "dev/arm/gic_v2m.hh"
130
131    pio_delay = Param.Latency('10ns', "Delay for PIO r/w")
132    gic = Param.BaseGic(Parent.any, "Gic on which to trigger interrupts")
133    frames = VectorParam.Gicv2mFrame([], "Power of two number of frames")
134
135class VGic(PioDevice):
136    type = 'VGic'
137    cxx_header = "dev/arm/vgic.hh"
138    gic = Param.BaseGic(Parent.any, "Gic to use for interrupting")
139    platform = Param.Platform(Parent.any, "Platform this device is part of.")
140    vcpu_addr = Param.Addr(0, "Address for vcpu interfaces")
141    hv_addr = Param.Addr(0, "Address for hv control")
142    pio_delay = Param.Latency('10ns', "Delay for PIO r/w")
143   # The number of list registers is not currently configurable at runtime.
144    maint_int = Param.UInt32("HV maintenance interrupt number")
145
146    # gicv_iidr same as gicc_idr
147    gicv_iidr = Param.UInt32(Self.gic.gicc_iidr,
148        "VM CPU Interface Identification Register")
149
150    def generateDeviceTree(self, state):
151        gic = self.gic.unproxy(self)
152
153        node = FdtNode("interrupt-controller")
154        node.appendCompatible(["gem5,gic", "arm,cortex-a15-gic",
155                               "arm,cortex-a9-gic"])
156        node.append(gic._state.interruptCellsProperty())
157        node.append(gic._state.addrCellsProperty())
158        node.append(FdtProperty("interrupt-controller"))
159
160        regs = (
161            state.addrCells(gic.dist_addr) +
162            state.sizeCells(0x1000) +
163            state.addrCells(gic.cpu_addr) +
164            state.sizeCells(0x1000) +
165            state.addrCells(self.hv_addr) +
166            state.sizeCells(0x2000) +
167            state.addrCells(self.vcpu_addr) +
168            state.sizeCells(0x2000) )
169
170        node.append(FdtPropertyWords("reg", regs))
171        node.append(FdtPropertyWords("interrupts",
172                                     [1, int(self.maint_int)-16, 0xf04]))
173
174        node.appendPhandle(gic)
175
176        yield node
177
178class Gicv3Its(BasicPioDevice):
179    type = 'Gicv3Its'
180    cxx_header = "dev/arm/gic_v3_its.hh"
181
182    dma = MasterPort("DMA port")
183    pio_size = Param.Unsigned(0x20000, "Gicv3Its pio size")
184
185    # CIL [36] = 0: ITS supports 16-bit CollectionID
186    # Devbits [17:13] = 0b100011: ITS supports 23 DeviceID bits
187    # ID_bits [12:8] = 0b11111: ITS supports 31 EventID bits
188    gits_typer = Param.UInt64(0x30023F01, "GITS_TYPER RO value")
189
190    def generateDeviceTree(self, state):
191        node = self.generateBasicPioDeviceNode(state, "gic-its", self.pio_addr,
192                                               self.pio_size)
193        node.appendCompatible(["arm,gic-v3-its"])
194        node.append(FdtProperty("msi-controller"))
195        node.append(FdtPropertyWords("#msi-cells", [1]))
196
197        return node
198
199class Gicv3(BaseGic):
200    type = 'Gicv3'
201    cxx_header = "dev/arm/gic_v3.hh"
202
203    # Used for DTB autogeneration
204    _state = FdtState(addr_cells=2, size_cells=2, interrupt_cells=3)
205
206    its = Param.Gicv3Its(Gicv3Its(), "GICv3 Interrupt Translation Service")
207
208    dist_addr = Param.Addr("Address for distributor")
209    dist_pio_delay = Param.Latency('10ns', "Delay for PIO r/w to distributor")
210    redist_addr = Param.Addr("Address for redistributors")
211    redist_pio_delay = Param.Latency('10ns',
212            "Delay for PIO r/w to redistributors")
213    it_lines = Param.UInt32(1020,
214            "Number of interrupt lines supported (max = 1020)")
215
216    maint_int = Param.ArmInterruptPin(
217        "HV maintenance interrupt."
218        "ARM strongly recommends that maintenance interrupts "
219        "are configured to use INTID 25 (PPI Interrupt).")
220
221    cpu_max = Param.Unsigned(256,
222        "Maximum number of PE. This is affecting the maximum number of "
223        "redistributors")
224
225    gicv4 = Param.Bool(True, "GICv4 extension available")
226
227    def interruptCells(self, int_type, int_num, int_flag):
228        """
229        Interupt cells generation helper:
230        Following specifications described in
231
232        Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
233        """
234        prop = self._state.interruptCells(0)
235        assert len(prop) >= 3
236        prop[0] = int_type
237        prop[1] = int_num
238        prop[2] = int_flag
239        return prop
240
241    def generateDeviceTree(self, state):
242        node = FdtNode("interrupt-controller")
243        node.appendCompatible(["arm,gic-v3"])
244        node.append(self._state.interruptCellsProperty())
245        node.append(self._state.addrCellsProperty())
246        node.append(self._state.sizeCellsProperty())
247        node.append(FdtProperty("ranges"))
248        node.append(FdtProperty("interrupt-controller"))
249
250        redist_stride = 0x40000 if self.gicv4 else 0x20000
251        node.append(FdtPropertyWords("redistributor-stride",
252            state.sizeCells(redist_stride)))
253
254        regs = (
255            state.addrCells(self.dist_addr) +
256            state.sizeCells(0x10000) +
257            state.addrCells(self.redist_addr) +
258            state.sizeCells(0x2000000) )
259
260        node.append(FdtPropertyWords("reg", regs))
261        node.append(FdtPropertyWords("interrupts",
262            self.interruptCells(1, int(self.maint_int.num)-16, 0xf04)))
263
264        node.appendPhandle(self)
265
266        # Generate the ITS device tree
267        node.append(self.its.generateDeviceTree(self._state))
268
269        yield node
270