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Home > Programmer’s Model > CP15 register map summary > Register 13, Trace process identifier register |
This register allows you to identify the currently executing process in multi-tasking environments using the real-time trace tools.
The contents of this register are replicated on the ETMPROCID pins of the ARM946E-S.
The following ARM instructions are used for accessing the Process ID register:
MRC p15, 0, rd, c13, c1, 1; read process ID register
MCR p15, 0, rd, c13, c1, 1; write process ID register
The format of the register, rd, transferred during these operations is shown in Figure 2.4.