Allocating Page Aligned Memory in User Space

From: LegoGT (legoburns_at_yahoo.com)
Date: 08/21/03

  • Next message: Kasper Dupont: "Re: Allocating Page Aligned Memory in User Space" 
    Date: 21 Aug 2003 07:36:32 -0700

    I have a program that I'm writing to interface with a driver that
    controls an IO board. In order to take the data from the driver and
    DMA it to another IO device (IDE drive) I need to have the data DMA
    page aligned. So, I'm pretty sure it can be a 32-bit address, but the
    data needs to be on a 64k boundary along with the PRD (Physical Region
    Descriptor) entries which will hold pointers to these data chunks.

    Does anyone know how to allocate memory like this without having to
    write a (kernel level) driver? Are there certain files or steps I
    need to look at in order to have this kernel functionality? (I know
    that it's possible using kmalloc, but I'm not quite sure how to use
    that from a program -- even if it's run as root.)

    Thanks,
    Greg

  • Next message: Kasper Dupont: "Re: Allocating Page Aligned Memory in User Space"

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