Debug support in a processor chip

Details Debug support in a processor chip Debug support in a processor chip

1994-10-11

1996-02-13

Beausoliel, Jr., Robert W.

Boots, shoes, and leggings

39518208, 3951831, 39518311, 364267, 3642672, 36426791, 364285, 3642323, 36492781, G06F 1130

Patent

active

054917930

ABSTRACT:
A central processing unit (CPU) with facilities for debug support. The debug support facilities include debug support unit (DSU), a debug support interface bus, and a diagnostic instrument. During an execution trace, the DSU transmits trace data such as an instruction address and a trace status via the bus to the diagnostic instrument. Instruction addresses are sent in 4-bit segments in one clock cycle during a trace. Trace status includes an indication of non-sequential instruction execution by the Instruction Unit (IU). A control bit is used to toggle a hold on IU operation where a non-sequential instruction is encountered in trace mode. The diagnostic instrument uses trace data provided by the DSU to generate a complete execution trace in real-time. During breakpoint operations, input such as a debug instruction is provided by the diagnostic instrument via the debug support interface bus to the CPU for execution thereby.

REFERENCES:
patent: 4598364 (1986-07-01), Gum et al.
patent: 4674089 (1987-06-01), Popet et al.
patent: 4780819 (1988-10-01), Kashiwagi
patent: 4811208 (1989-03-01), Myers et al.
patent: 4901259 (1990-02-01), Watkins
patent: 4924382 (1990-05-01), Shouda
patent: 4954942 (1990-09-01), Masuda et al.
patent: 5088027 (1992-02-01), Tanagawa et al.
patent: 5127103 (1992-06-01), Hill et al.
patent: 5132971 (1992-07-01), Oguma et al.
patent: 5140671 (1992-08-01), Hayes et al.
patent: 5165036 (1992-11-01), Miyata et al.
patent: 5237700 (1993-08-01), Johnson et al.
patent: 5278962 (1994-01-01), Masuda et al.
patent: 5345580 (1994-09-01), Tamaru et al.

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