GR740-UM-DS, Nov 2017, Version 1.7 397 www.cobham.com/gaisler
GR740
33.6.5 DSU trap register
The DSU trap register is a read-only register that indicates which SPARC trap type that caused the
processor to enter debug mode. When debug mode is force by setting the BN bit in the DSU control
register, the trap type will be 0xb (hardware watchpoint trap).
33.6.6 DSU ASI register
The DSU can perform diagnostic accesses to different ASI areas. The value in the ASI diagnostic
access register is used as ASI while the address is supplied from the DSU memory area when per-
forming an access at offset 0x700000.
Table 528. 0x400020 - DTR - DSU trap register
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RESERVED EM TRAPTYPE RESERVED
0NRNR0
rrrr
31: 13 RESERVED
12 Error mode (EM) - Set if the trap would have cause the processor to enter error mode.
11: 4 Trap type (TRAPTYPE) - 8-bit SPARC trap type
3:0 Read as 0x0
Table 529. 0x400024 - DASI- DSU ASI diagnostic access register
31 87 0
RESERVED ASI
0NR
rrw
31: 8 RESERVED
7: 0 ASI (ASI) - ASI to be used on diagnostic ASI access
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