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Using a JTAG in Linux Driver Debugging - page 31 / 48

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04/16/2008 - Copyright © 2008 The PTR Group Inc.

CELF-2008-SVC-31

Linux-Aware JTAGs

There are several rather tricky transitions during the Linux booting process

Transitioning from flash to RAM

Transitioning from physical addresses to kernel virtual addresses

These transitions require the use of hardware breakpoints

Make sure that your JTAG is “Linux aware”

It must understand Linux’s use of the MMU to be of much use for driver debugging

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