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CONFIG_MTD_PMC551: Ramix PMC551 PCI Mezzanine RAM card support

General informations

The Linux kernel configuration item CONFIG_MTD_PMC551:

Help text

This provides a MTD device driver for the Ramix PMC551 RAM PCI card from Ramix Inc. http://www.ramix.com/products/memory/pmc551.html. These devices come in memory configurations from 32M - 1G. If you have one, you probably want to enable this.

If this driver is compiled as a module you get the ability to select the size of the aperture window pointing into the devices memory. What this means is that if you have a 1G card, normally the kernel will use a 1G memory map as its view of the device. As a module, you can select a 1M window into the memory and the driver will "slide" the window around the PMC551's memory. This was particularly useful on the 2.2 kernels on PPC architectures as there was limited kernel space to deal with.

Hardware

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