PXA3xx Boot ROM Reference Manual - Marvell

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PXA3xx Processor and Tavor ProcessorBoot ROM Reference ManualThe auto-boot feature has certain platform requirements that must be enabled. For fuses to beconfigured, VCC_MVT must be raised to 1.9V through a sequence of PWR I2C commands sent tothe PMIC over the PWR_I2C bus.A trusted platform must be architected such that the Services Power Management Unit sends I2Ccommands to the PMIC. The processor sends these command sequences automatically. There areinternal handshaking and acknowledgement tokens passed between Caddo, the Boot ROM, and theServices unit to enable the correct sequencing of I2C commands and voltage changes toVCC_MVT. This sequencing is isolated and cannot be reconfigured or changed in any way.The basic steps of operation are as follows:1. The Auto-Boot procedure selects the valid boot memory by the Boot ROM finding a valid TIMheader.• VCC_MVT is currently at default value -> 1.8V2. MDTV2 is loaded with the value 0x08 -> for 1.9V.• The higher voltage is required to allow the fuses to be configured correctly.• VCC_MVT operating at 1.9V is only allowed while the fuses are been configured.3. VCC1[MVS] and VCC1[MGO] are both set to 0b1.4. Now VCC_MVT voltage is raised by the PMIC to 1.9V.• Internal handshaking indicates the fuses have been configured.• The Services Unit must now return VCC_MVT to default value.5. MDTV1 is loaded with 0x04 -> for 1.8V.6. VCC1[MVS] is cleared 0b0 and VCC1[MGO] is set to 0b1.7. Now VCC_MVT is lowered to 1.8V.Refer to the “Clock Controllers and Power Management” chapter of the PXA3xx Processor FamilyDevelopers Manual for more information on PWR_I2C commands.NoteNot only must a PXA3xx-compliant PMIC be used in any PXA3xx-enabled platform butalso for trusted platforms, the system design must be connected in such a way toenable the PMIC to raise VCC_MVT for fuse configuring. This design may requiredetailed inspections of the PMIC datasheet to ensure that VCC_MVT is connected to adynamically programmable PMIC output regulator. This is known as “Boost Mode”.Refer to the PXA3xx EMTS for more details.Doc. No. MV-S301208-00 Rev. - PUBLIC RELEASE Copyright © 2010 MarvellPage 20
Boot ROM DifferencesPXA31x and Tavor Processor Auto-BootCopyright © 2010 Marvell PUBLIC RELEASE Doc. No. MV-S301208-00 Rev. -Page 21
Page 1 and 2: CoverMarvell® PXA3xx Processors an
Page 3 and 4: Table of Contents1 Boot ROM Functio
Page 5 and 6: 6.3.5 USB Vendor Request Package ..
Page 7 and 8: Figure 1:PXA3xx Top Level Boot ROM
Page 9 and 10: Table 42: Host Commands ...........
Page 11 and 12: 1 Boot ROM Functional Overview1.1 G
Page 13 and 14: Figure 1:PXA3xx Top Level Boot ROM
Page 15 and 16: Boot ROM Differences2 Boot ROM Diff
Page 17 and 18: Boot ROM DifferencesTIM/NTIM/OBM Su
Page 19: Boot ROM DifferencesPXA31x and Tavo
Page 23 and 24: 3 Software RequirementsThis chapter
Page 25 and 26: Typedef struct S_Reloc{USHORT Heade
Page 27 and 28: 4 Methods for Platform Provisioning
Page 29 and 30: 4. If the same OEM boot module is u
Page 31 and 32: multiple versions of the Device Key
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PXA3xx Processor and Tavor Processo
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PXA3xx Processors and Tavor Process
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Marvell Semiconductor, Inc.700 Firs
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PXA3xx Boot ROM Reference Manual - Marvell

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