967b75230b
On a real POWER8 system, the Pervasive Interconnect Bus (PIB) serves
as a backbone to connect different units of the system. The host
firmware connects to the PIB through a bridge unit, the
Alter-Display-Unit (ADU), which gives him access to all the chiplets
on the PCB network (Pervasive Connect Bus), the PIB acting as the root
of this network.
XSCOM (serial communication) is the interface to the sideband bus
provided by the POWER8 pervasive unit to read and write to chiplets
resources. This is needed by the host firmware, OPAL and to a lesser
extent, Linux. This is among others how the PCI Host bridges get
configured at boot or how the LPC bus is accessed.
To represent the ADU of a real system, we introduce a specific
AddressSpace to dispatch XSCOM accesses to the targeted chiplets. The
translation of an XSCOM address into a PCB register address is
slightly different between the P9 and the P8. This is handled before
the dispatch using a 8byte alignment for all.
To customize the device tree, a QOM InterfaceClass, PnvXScomInterface,
is provided with a populate() handler. The chip populates the device
tree by simply looping on its children. Therefore, each model needing
custom nodes should not forget to declare itself as a child at
instantiation time.
Based on previous work done by :
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
[dwg: Added cpu parameter to xscom_complete()]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/*
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* QEMU PowerPC PowerNV various definitions
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*
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* Copyright (c) 2014-2016 BenH, IBM Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _PPC_PNV_H
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#define _PPC_PNV_H
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#include "hw/boards.h"
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#include "hw/sysbus.h"
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#include "hw/ppc/pnv_xscom.h"
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#define TYPE_PNV_CHIP "powernv-chip"
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#define PNV_CHIP(obj) OBJECT_CHECK(PnvChip, (obj), TYPE_PNV_CHIP)
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#define PNV_CHIP_CLASS(klass) \
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OBJECT_CLASS_CHECK(PnvChipClass, (klass), TYPE_PNV_CHIP)
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#define PNV_CHIP_GET_CLASS(obj) \
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OBJECT_GET_CLASS(PnvChipClass, (obj), TYPE_PNV_CHIP)
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typedef enum PnvChipType {
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PNV_CHIP_POWER8E, /* AKA Murano (default) */
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PNV_CHIP_POWER8, /* AKA Venice */
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PNV_CHIP_POWER8NVL, /* AKA Naples */
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PNV_CHIP_POWER9, /* AKA Nimbus */
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} PnvChipType;
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typedef struct PnvChip {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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uint32_t chip_id;
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uint64_t ram_start;
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uint64_t ram_size;
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uint32_t nr_cores;
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uint64_t cores_mask;
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void *cores;
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hwaddr xscom_base;
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MemoryRegion xscom_mmio;
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MemoryRegion xscom;
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AddressSpace xscom_as;
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} PnvChip;
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typedef struct PnvChipClass {
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/*< private >*/
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SysBusDeviceClass parent_class;
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/*< public >*/
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const char *cpu_model;
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PnvChipType chip_type;
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uint64_t chip_cfam_id;
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uint64_t cores_mask;
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hwaddr xscom_base;
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uint32_t (*core_pir)(PnvChip *chip, uint32_t core_id);
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} PnvChipClass;
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#define TYPE_PNV_CHIP_POWER8E TYPE_PNV_CHIP "-POWER8E"
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#define PNV_CHIP_POWER8E(obj) \
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OBJECT_CHECK(PnvChip, (obj), TYPE_PNV_CHIP_POWER8E)
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#define TYPE_PNV_CHIP_POWER8 TYPE_PNV_CHIP "-POWER8"
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#define PNV_CHIP_POWER8(obj) \
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OBJECT_CHECK(PnvChip, (obj), TYPE_PNV_CHIP_POWER8)
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#define TYPE_PNV_CHIP_POWER8NVL TYPE_PNV_CHIP "-POWER8NVL"
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#define PNV_CHIP_POWER8NVL(obj) \
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OBJECT_CHECK(PnvChip, (obj), TYPE_PNV_CHIP_POWER8NVL)
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#define TYPE_PNV_CHIP_POWER9 TYPE_PNV_CHIP "-POWER9"
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#define PNV_CHIP_POWER9(obj) \
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OBJECT_CHECK(PnvChip, (obj), TYPE_PNV_CHIP_POWER9)
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/*
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* This generates a HW chip id depending on an index:
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*
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* 0x0, 0x1, 0x10, 0x11
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*
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* 4 chips should be the maximum
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*/
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#define PNV_CHIP_HWID(i) ((((i) & 0x3e) << 3) | ((i) & 0x1))
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#define TYPE_POWERNV_MACHINE MACHINE_TYPE_NAME("powernv")
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#define POWERNV_MACHINE(obj) \
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OBJECT_CHECK(PnvMachineState, (obj), TYPE_POWERNV_MACHINE)
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typedef struct PnvMachineState {
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/*< private >*/
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MachineState parent_obj;
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uint32_t initrd_base;
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long initrd_size;
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uint32_t num_chips;
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PnvChip **chips;
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} PnvMachineState;
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#define PNV_FDT_ADDR 0x01000000
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#define PNV_TIMEBASE_FREQ 512000000ULL
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/*
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* POWER8 MMIO base addresses
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*/
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#define PNV_XSCOM_SIZE 0x800000000ull
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#define PNV_XSCOM_BASE(chip) \
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(chip->xscom_base + ((uint64_t)(chip)->chip_id) * PNV_XSCOM_SIZE)
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#endif /* _PPC_PNV_H */
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