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Introduction References and Presentation at: - - PowerPoint PPT Presentation

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Introduction References and Presentation at: http://www.elinux.org/SOC_Spies Introduction Dave Anders aka prpplague Introduction Dave Anders aka prpplague Currently Contracted with CircuitCo Introduction Dave Anders aka

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Introduction References and Presentation at: http://www.elinux.org/SOC_Spies

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Introduction

 Dave Anders aka prpplague

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Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo

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Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools

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Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

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Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

 NOT Flame Fest

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SLIDE 7

Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

 NOT Flame Fest  NOT representing any company or organization

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SLIDE 8

Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

 NOT Flame Fest  NOT representing any company or organization  NOT promoting one architecture over another

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Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

 Historical Perspective

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SLIDE 10

Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

 Historical Perspective  General Pros/Cons

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SLIDE 11

Introduction

 Dave Anders aka prpplague  Currently Contracted with CircuitCo  Partners in TinCanTools  Double-Agent Developer: ARM vs. X86

 Historical Perspective  General Pros/Cons  Practical Considerations

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SLIDE 12

Historical Perspective

 Embedded in 1999

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Historical Perspective

 Embedded in 1999

 Geode  STPC  i486

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Historical Perspective

 Embedded in 1999  TCS-X1

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SLIDE 15

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY

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SLIDE 16

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY

 Design Files  Linux Support  ARM Based

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SLIDE 17

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard

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SLIDE 18

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard

 Design Files  Linux Support  ARM Based

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SLIDE 19

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard  MinnowBoard

 Intel x86???

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SLIDE 20

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard  MinnowBoard  MinnowBoard Max

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SLIDE 21

Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard  MinnowBoard  MinnowBoard Max

 Design Files  Linux Support  IA 64-bit

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Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard  MinnowBoard  MinnowBoard Max  X86 and ARM Designs

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Historical Perspective

 Embedded in 1999  TCS-X1  ITSY  PandaBoard  MinnowBoard  MinnowBoard Max  X86 and ARM Designs

Experiences and opinions represented here are from my personal perspective of creating open source hardware designs that first and foremost run Linux

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General Pros/Cons

 x86 Pros

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General Pros/Cons

 x86 Pros – Uniformity

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General Pros/Cons

 x86 Pros – Uniformity

 Decades spent working on uniformity

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SLIDE 27

General Pros/Cons

 x86 Pros – Uniformity

 Decades spent working on uniformity  Component Vendor infrastructure

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SLIDE 28

General Pros/Cons

 x86 Pros – Uniformity

 Decades spent working on uniformity  Component Vendor infrastructure  Reference Designs

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SLIDE 29

General Pros/Cons

 x86 Pros – Uniformity

 Decades spent working on uniformity  Component Vendor infrastructure  Reference Designs #exactsteps

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SLIDE 30

General Pros/Cons

 x86 Pros – Uniformity

 Decades spent working on uniformity  Component Vendor infrastructure  Reference Designs #exactsteps

Here is a reference design, if you use it exactly as given, it will work!

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros

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SLIDE 32

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

 No one enforcing compatibility

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SLIDE 34

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

 No one enforcing compatibility  Open Vendor interaction

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SLIDE 35

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

 No one enforcing compatibility  Open Vendor interaction  Reference Designs

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SLIDE 36

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

 No one enforcing compatibility  Open Vendor interaction  Reference Designs #rtfm

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SLIDE 37

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

 No one enforcing compatibility  Open Vendor interaction  Reference Designs #rtfm

Here is a reference design with one example of implementation and if you change it, you better check the datasheet!

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

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SLIDE 39

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility

The things that provide the greatest strengths for both ARM and x86 are also their greatest weaknesses

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons

 Rigid adhearance standards

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SLIDE 41

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons

 Rigid adhearance standards  Lack of Vendor interaction

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SLIDE 42

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons

 Rigid adhearance standards  Lack of Vendor interaction  Lack of Design variations

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SLIDE 43

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons

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SLIDE 44

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons

 Lack of standards enforcement

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SLIDE 45

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons

 Lack of standards enforcement  Lack of vendor compliance

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons

 Lack of standards enforcement  Lack of vendor compliance  Lack of Design validation

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SLIDE 47

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons  Pathway Forward

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SLIDE 48

General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons  Pathway Forward

 x86 → embedded  ARM → server

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons  Pathway Forward

 x86 → embedded – relaxing standards - easy  ARM → server

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General Pros/Cons

 x86 Pros – Uniformity  ARM Pros – Flexibility  x86 Cons  ARM Cons  Pathway Forward

 x86 → embedded – relaxing standards - easy  ARM → server – enforcing standards - hard

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SLIDE 51

Practical Considerations

 Hardware

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Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)

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SLIDE 53

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)

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SLIDE 54

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)

BeagleBone Black 18 Unique Values 131 Total Resisors

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SLIDE 55

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)

BeagleBone Black 18 Unique Values 131 Total Resisors MinnowBoard Max 73 Unique Values 322 Total Resisors

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SLIDE 56

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)

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SLIDE 57

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)

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SLIDE 58

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)  Power Supplies (Pro-x86/Con-ARM)

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SLIDE 59

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)  Power Supplies (Pro-x86/Con-ARM)

 Use without dedicated PMIC  Robust fault tolerance  Wide component selection

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SLIDE 60

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)  Power Supplies (Pro-x86/Con-ARM)  Peripherals (Pro-ARM/Con-x86)

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SLIDE 61

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)  Power Supplies (Pro-x86/Con-ARM)  Peripherals (Pro-ARM/Con-x86)

 Limited component selection  Gige PHY on MinnowBoard  Codec on MinnowBoard

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SLIDE 62

Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)  Power Supplies (Pro-x86/Con-ARM)  Peripherals (Pro-ARM/Con-x86)  Peripherals (Pro-x86/Con-ARM)

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Practical Considerations

 Hardware

 Component Count (Pro-Arm/Con-x86)  Power Supplies (Pro-x86/Con-ARM)  Peripherals (Pro-ARM/Con-x86)  Peripherals (Pro-x86/Con-ARM)

 Too many options  Lack of example configurations  Design for least common denominator  USB PHY on PandaBoard

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Practical Considerations

 Hardware  Software

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Practical Considerations

 Hardware  Software

 Cross/Native Compile

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Practical Considerations

 Hardware  Software

 Cross/Native Compile  PinMuxing

 Device Tree Overlays (Pantelis Antoniou)

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Practical Considerations

 Hardware  Software

 Cross/Native Compile  PinMuxing

 Device Tree Overlays (Pantelis Antoniou)  ACPI with SSDT (Rafael Wysocki)

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SLIDE 68

Practical Considerations

 Hardware  Software

 Cross/Native Compile  PinMuxing

 Device Tree Overlays (Pantelis Antoniou)  ACPI with SSDT (Rafael Wysocki)  ACPI on ARM (Graeme Gregory)

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SLIDE 69

Practical Considerations

 Hardware  Software

 Cross/Native Compile  PinMuxing  Mainline Linux Support

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Practical Considerations

 Hardware  Software

 Cross/Native Compile  PinMuxing  Mainline Linux Support

 Evil Vendor Trees  Distribution Selection

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Conclusion

 Historical Perspective  Generals Pros/Cons  Practical Considerations

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Conclusion

 Historical Perspective  Generals Pros/Cons  Practical Considerations  Use the Arch that makes the most sense

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SLIDE 73

Conclusion

 Historical Perspective  Generals Pros/Cons  Practical Considerations  Use the Arch that makes the most sense  ARM and x86 have a common enemy

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Conclusion

 Historical Perspective  Generals Pros/Cons  Practical Considerations  Use the Arch that makes the most sense  ARM and x86 have a common enemy

SYSTEMD

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Conclusion

Questions?

http://www.elinux.org/SOC_Spies