9 Data Buffer Address HIGH register, DBAHI

This register, together with the DBALO register, enables the TMC to locate the trace buffer in system memory. It contains bits >= bit[32] of the start address of the trace buffer in system memory. The width of this register is given by: (AXI_ADDR_WIDTH- 32), however, if AXI_ADDR_WIDTHis <= 32 bits, this register is reserved and access type is RAZ/WI. Modifying this register, other than when in Disabled state, results in UNPREDICTABLE behavior. Software must program it with an initial value before setting CTL.TraceCaptEn bit to 1.

The DBAHI register characteristics are:

Attributes
Offset

0x011C

Type

Read-write

Reset

0x000-----

Width

32

The following figure shows the bit assignments.

Figure 9-379 DBAHI register bit assignments
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The following table shows the bit assignments.

Table 9-392 DBAHI register bit assignments

Bits Reset value Name Function
[31:20] 0b000000000000 RAZ/WI

Read-As-Zero, Writes Ignored.

[19:0] UNKNOWN BUFADDRHI

Data Buffer High Address. Holds the upper bits, that is, bit[32] and above, of the AXI address that is used to locate the trace buffer in the system.

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