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Large Physical Address Extension

RAVEENDRA TALABATTULA
Note: This was originally posted on 19th November 2012 at http://forums.arm.com

Hi,

Can some body explain me about the Large Physical address extension in ARM ? i.e How it is implemented ? What are the registers that are invloved?
what about the page tables?
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  • Arm Employee Badge
    Note: This was originally posted on 20th November 2012 at http://forums.arm.com

    For the detailed information (register, table formats, etc....) you will need the ARM Architecture Reference Manual, Rev C or C.b.  You can get this from the documentation section of ARM's website (called infocenter).
    For the basic concept...In ARMv7 ( and earlier) addresses as used by code are called virtual addresses (VA)  and are always 32-bit. LPAE allows these 32-bit VAs to be translated into physical addresses that ate up to 40 bits long
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  • Arm Employee Badge
    Note: This was originally posted on 20th November 2012 at http://forums.arm.com

    For the detailed information (register, table formats, etc....) you will need the ARM Architecture Reference Manual, Rev C or C.b.  You can get this from the documentation section of ARM's website (called infocenter).
    For the basic concept...In ARMv7 ( and earlier) addresses as used by code are called virtual addresses (VA)  and are always 32-bit. LPAE allows these 32-bit VAs to be translated into physical addresses that ate up to 40 bits long
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