Review Board 2.0.15


arch: Use ASI 0xFF instead of bit 63 to for generic IPRs

Review Request #2032 - Created Oct. 3, 2013 and discarded

Information
Andreas Sandberg
gem5
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Reviewers
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Changeset 9905:2f0374a09fc5
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arch: Use ASI 0xFF instead of bit 63 to for generic IPRs

Using address bit 63 to identify generic IPRs caused problems on
SPARC, where IPRs are heavily used. This changeset redefines how
generic IPRs are identified. Instead of using bit 63, we now use the
ASI field in a request. We reserve ASI 0xFF for internal gem5 use. ASI
0xFF is implementation defined on SPARC, which means that we can
safely use it for generic IPRs. No other architecture is currently
using the ASI field.
m5ops using the IPR interface works on x86 in kvm. ARM, SPARC, and x86 targets compile. Can't run the affected (80.solaris-boot) test case due to missing binaries.
Review request changed
Updated (Oct. 7, 2013, 2:18 a.m.)

Status: Discarded