4.5.6. Debug features

The ARMCortexA8CT component exports a CADI debug interface.

Registers

All processor, VFP and CP15 registers, apart from performance counter registers, are visible in the debugger. See the processor technical reference manual for a detailed description of available registers.

The CP14 DSCR register is visible for compatibility reasons with some debuggers. This register has no defined behavior.

Breakpoints

There is direct support for:

  • single address unconditional instruction breakpoints

  • unconditional instruction address range breakpoints

  • single address unconditional data breakpoints.

The debugger might augment these with more complex combinations of breakpoints.

The current models support processor exception breakpoints by the use of pseudoregisters available in the debugger register window. When debugger support is added to directly support processor exceptions, these pseudoregisters are removed.

Setting an exception register to a nonzero value causes execution to stop on entry to the associated exception vector.

Memory

The ARMCortexA8CT component presents two 4GB views of virtual memory, one as seen from secure mode and one as seen from normal mode.

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