Method for booting a host device from an MMC/SD device, a host device bootable from an MMC/SD device and an MMC/SD device method a host device may booted from

US 20070168652A1
Filed: 01/17/2006
Published: 07/19/2007
Est. Priority Date: 01/17/2006
Status: Active Grant

First Claim

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1. A method for booting a host device from a peripheral device, via an MMC/SD interface with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, said method comprising:

providing power to said power terminals, setting the command terminal of said MMC/SD interface during power-up to low, and monitoring the data bus for a start bit of a data transmission.

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Abstract

Systems and methods for booting a host device(s) from a peripheral device(s), via an interface, such as an MMC/SD interface, with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal. Power is provided to the power terminals, and the command terminal of the MMC/SD or analogous interface is set during power-up to low. The data bus is monitored for a start bit of data transmission.

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41 Claims

1. A method for booting a host device from a peripheral device, via an MMC/SD interface with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, said method comprising:
- providing power to said power terminals, setting the command terminal of said MMC/SD interface during power-up to low, and monitoring the data bus for a start bit of a data transmission.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
- - 2. A method according to claim 1, said method further comprising sending a clock signal from said host device to said clock terminal of said MMC/SD interface, wherein said command terminal of said MMC/SD interface is set to low before or during power-up process during the transmission of between 24 to 148, preferably between 60 and 100 and most preferably to 74 initialization clock cycles.
  - 3. A method according to claim 1, said method further comprising sending a clock signal from said host device to said clock terminal as long as the device has sent the data via said data bus.
  - 4. A method according to claim 1, wherein said data bus terminals, said method further comprising setting the data bus terminals to low, to indicate a width for the data bus to be used for the data transfer.
  - 5. Computer program product capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections for carrying out the steps of claim 1, when said program is run on a host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 6. Computer program product for executing a method capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections stored on a machine-readable medium for carrying out the steps of claim 1, when said program product is run on host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 7. Computer data signal embodied in a carrier wave and representing instructions, which when executed by a host device, peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface cause the steps of claim 1 to be carried out.

8. A method for booting from a peripheral device having an MMC/SD-interface, via said MMC/SD interface with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, said method comprising:
- receiving power at said power terminals of said MMC/SD-interface, receiving a low signal at the command terminal before or during power up, and sending the first data of a predefined storage area via data bus, starting with a start bit of the first data frame.
- View Dependent Claims (9, 10, 11, 12, 13)
- - 9. A method according to claim 8, wherein said first data of a predefined storage area via data bus, are only send if and when receiving a low signal at said command terminal of said MMC/SD-interface during power-up process during the transmission of between 24 to 148, preferably between 60 and 100 and most preferably to 74 initialization clock cycles.
  - 10. A method according to claim 8, further comprising:
    - receiving a low signal at the data bus terminals, indicating a width for the data bus to be used for the transfer by, and sending said data using the indicated data bus width.
  - 11. Computer program product capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections for carrying out the steps of claim 8, when said program is run on a host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 12. Computer program product for executing a method capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections stored on a machine-readable medium for carrying out the steps of claim 8, when said program product is run on host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 13. Computer data signal embodied in a carrier wave and representing instructions, which when executed by a host device, peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface cause the steps of claim 8 to be carried out.

14. A method for booting a host device from a peripheral device having an MMC/SD-interface with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, said method comprising:
- sending during an initialization procedure an argument for a boot request from said host device via said MMC/SD-interface to the peripheral device, sending a clock signal to the clock line, and monitoring the data bus for a start bit of a data transmission.
- View Dependent Claims (15, 16, 17, 18)
- - 15. Computer program product capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections for carrying out the steps of claim 14, when said program is run on a host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 16. Computer program product for executing a method capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections stored on a machine-readable medium for carrying out the steps of claim 14, when said program product is run on host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 17. Computer data signal embodied in a carrier wave and representing instructions, which when executed by a host device, peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface cause the steps of claim 14 to be carried out.
  - 18. A method according to claim 14, further comprising:
    - sending additional arguments indicating parameters related to the boot sequence selected from the group of number of data lines to be used for the boot sector read, and clock frequency/timing mode to be used, along with argument for the boot request from said host device to the MMC/SD-interface.

19. A method for booting a host device from a peripheral device having an MMC/SD-interface with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, said method comprising:
- receiving during an initialization procedure of the peripheral device an argument for a boot request from said host device at said MMC/SD-interface of the peripheral device, receiving a clock signal at the data bus, and sending data starting with a start bit of a data transmission to said host device via said MMC/SD-interface, if and when boot data are stored in said peripheral device.
- View Dependent Claims (20, 21, 22, 23)
- - 20. A method according to claim 19, further comprising receiving additional arguments indicating parameters related to the boot sequence selected from the group of number of data lines to be used for the boot sector read, and clock frequency/timing mode to be used for a data transmission, along with said argument for the boot request from said host device, and using said indicated parameters for transmitting data via said data bus to said host device.
  - 21. Computer program product capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections for carrying out the steps of claim 19, when said program is run on a host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 22. Computer program product for executing a method capable to boot a host device from a peripheral device having an MMC/SD-interface, comprising program code sections stored on a machine-readable medium for carrying out the steps of claim 19, when said program product is run on host device, a peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface.
  - 23. Computer data signal embodied in a carrier wave and representing instructions, which when executed by a host device, peripheral device having an MMC/SD-interface or a system of host device with an inserted peripheral device having an MMC/SD-interface cause the steps of claim 19 to be carried out.

24. A bootable host device configured for being booted from a peripheral device having an MMC/SD-interface, said host device comprising:
- a power supply, a processor connected to said power supply, and an MMC/SD-interface connected to said processor and to said power supply, said MMC/SD interface with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, wherein said host device is configured for providing power to the terminals of said MMC/SD-interface, and setting the command terminal of said MMC/SD-interface during power-up to low, and monitoring the data bus for a start bit of a data transmission.
- View Dependent Claims (25, 26, 27)
- - 25. A bootable host device according to claim 24, wherein said processor is configured to send a clock signal from said host device to said data bus terminals of said MMC/SD-interface and to set the command terminal of said MMC/SD-interface during power-up process to low while transmitting between 24 and 148, preferably between 60 and 100 and most preferably 74 initialization clock cycles.
  - 26. A bootable host device according to claim 24, wherein said processor is further configured to send a clock signal from said host device to said data bus terminals of said MMC/SD-interface as long as the MMC/SD device starts to send the first data via said data bus.
  - 27. A bootable host device according to claim 24, wherein said processor is configured to set the data bus terminals to low, to indicate a width for the data bus to be used for the transfer by a peripheral device having an MMC/SD-interface inserted in said MMC/SD-interface.

28. A peripheral device having an MMC/SD-interface configured for booting a bootable host device configured for being booted from a peripheral device having an MMC/SD-interface, said peripheral device having comprising:
- an MMC/SD-interface, provided with power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, an peripheral device controller, connected to said MMC/SD-interface, a memory module, connected to said peripheral device controller, and wherein said peripheral device controller is configured for sending the first data of a predefined storage area via a data bus, starting with a start bit of the first data frame, when receiving power at the terminals of said MMC/SD-interface of said peripheral device, and a low signal a the command terminal of said MMC/SD-interface during power-up.
- View Dependent Claims (29, 30)
- - 29. A peripheral device according to claim 28, wherein said peripheral device controller is further configured to send said first data of a predefined storage area via data bus, only when receiving a low signal at said command terminal of said MMC/SD-interface before or during power-up process during the transmission of between 24 to 148, preferably between 60 and 100 and most preferably to 74 initialization clock cycles.
  - 30. A peripheral device according to claim 28, wherein said peripheral device controller is further configured to:
    - receive a low signal at the data bus terminals of said MMC/SD-interface, indicating a width for the data bus to be used for the transfer by, and sending said data using the indicated data bus width.

31. A bootable host device configured for being booted from a peripheral device having an MMC/SD interface, said host device comprising:
- a power supply, a processor connected to said power supply, and an MMC/SD-interface connected to said processor and to said power supply, said MMC/SD-interface having power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal; and
  
  wherein said host device is configured for;
  
  sending during an initialization process of the peripheral device an argument for a boot request from said host device via said MMC/SD-interface to the peripheral device, and monitoring the data bus for a start bit of a data transmission.
- View Dependent Claims (32, 33)
- - 32. A bootable host device according to claim 31, wherein said host device is configured for sending additional arguments via said MMC/SD-interface, said additional arguments indicating parameters related to the boot sequence selected from the group of number of data lines to be used for the boot sector read, and clock frequency/timing mode to be used, along with said argument for the boot request from said host device to said MMC/SD-interface.
  - 33. A bootable host device according to claim 31, wherein said host device is further configured, to set the data bus terminals of said MMC/SD-interface to low, for indicating a width for the data bus to be used for the transfer.

34. A peripheral device configured for booting a bootable host device configured for being booted from an peripheral device, said peripheral device comprising an MMC/SD-interface, comprising power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, an peripheral device controller, connected to said MMC/SD-interface, a memory module, connected to said peripheral device controller, and wherein said peripheral device being configured for sending data starting with a start bit of a data transmission via said MMC/SD-interface to said host device, in case boot data are stored in the peripheral device, if and when receiving an argument for a boot request from said host device at said MMC/SD-interface of the peripheral device, and when receiving a clock signal at the clock line.
- View Dependent Claims (35, 36)
- - 35. A peripheral device according to claim 34, wherein said peripheral device controller is further configured to receive a low signal at the data bus terminals of said MMC/SD-interface terminal indicating a width for the data bus to be used for the transfer and wherein said peripheral device controller is further configured for using said indicated data bus width for the data bus to be used for the transfer.
  - 36. A peripheral device according to claim 34, wherein said peripheral device controller is further configured to receive along with argument for the boot request from said host device, additional arguments indicating parameters related to the boot sequence selected from the group of number of data lines to be used for the boot sector read, and clock frequency/timing mode to be used, and is further configured to send said data via said data bus to said host device according to said indicated parameters.

37. A bootable host device configured for being booted from an peripheral device having an MMC/SD interface, said host device comprising a power supply, a processor connected to said power supply, and an MMC/SD-interface connected to said processor and to said power supply, said MMC/SD-interface having power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, wherein said host device is configured for starting a standard initialization data exchange of an peripheral device having an MMC/SD interface via said MMC/SD-interface until a stand-by-state of said peripheral device is reached, and performing a data exchange between said host device and said peripheral device from said stand-by-state for searching for a valid boot code in the components in bus.

38. A bootable host device configured for being booted from an peripheral device having an MMC/SD interface, wherein said peripheral device is provided with an Operation Condition Register with an additional argument for a boot request, said host device comprising a power supply, a processor connected to said power supply, and an MMC/SD-interface connected to said processor and to said power supply, said MMC/SD-interface having power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, wherein said host device is configured for sending after initialization of an peripheral device having an MMC/SD interface an argument for a boot request to said MMC/SD-interface, and monitoring the data bus for boot data to be received from said peripheral device via said MMC/SD-interface

39. A peripheral device having a MMC/SD interface configured for booting a bootable host device configured for being booted from an peripheral device having an MMC/SD interface, wherein said peripheral device is provided in the Operation Condition Register with an additional argument for a boot request said peripheral device comprising an MMC/SD-interface, comprising power terminals, a data bus with data bus terminals, a clock line with a clock terminal and a command line with command terminal, an peripheral device controller with a Operation Condition Register, connected to said MMC/SD-interface, and a memory module, connected to said peripheral device controller, wherein said peripheral device is provided in the Operation Condition Register with an additional argument for a boot request, and said peripheral device being configured for receiving after an initialization procedure an peripheral device an argument for a boot request at the peripheral device, and retrieving and sending boot data from the peripheral device memory module via said MMC/SD-interface to said host device.
- View Dependent Claims (40, 41)
- - 40. A peripheral device having an MMC/SD interface according to claim 39, wherein said Operation Condition Register with said argument for a boot request is implemented as a hard coded hardware component, connected to or implemented in said peripheral device controller.
  - 41. A peripheral device having an MMC/SD interface according to claim 39, wherein said Operation Condition Register with said argument for a boot request is implemented as software running in peripheral device controller.

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Current Assignee
Memory Technologies LLC (Pendrell Corporation)
Original Assignee
Nokia Corporation
Inventors
Ahvenainen, Marko, Mylly, Kimmo

Granted Patent

US 7,739,487 B2
Time in Patent Office

Days
Field of Search
US Class Current

713/2
CPC Class Codes

G06F 9/4401 Bootstrapping security arra...

Method for booting a host device from an MMC/SD device, a host device bootable from an MMC/SD device and an MMC/SD device method a host device may booted from

First Claim

3 Assignments

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55 Citations

41 Claims

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Method for booting a host device from an MMC/SD device, a host device bootable from an MMC/SD device and an MMC/SD device method a host device may booted from

First Claim

3 Assignments

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0 Petitions

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Accused Products

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Abstract

55 Citations

41 Claims

Specification

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