Differential D21940

plic: handle renumbered harts
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Authored by mhorne on Oct 8 2019, 12:52 PM.

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markj
br
kp

Summary

RISC-V harts may be renumbered during boot depending on the system's
configuration. For example, on the Hifive Unleashed hart 0 is a monitor
hart that never enters supervisor mode. Record the mapping of cpuid to
hart number, so that we can use the original hart value for cases where
they are not 1-to-1.

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Buildable 26926
Build 25230: arc lint + arc unit

Event Timeline

mhorne created this revision.Oct 8 2019, 12:52 PM

Harbormaster completed remote builds in B26926: Diff 63037.Oct 8 2019, 12:52 PM

hart ID is recorded to pcpup->pc_hart. Could it be used ? i.e. PCPU_GET(hart) or pcpu_find(cpu)->pc_hart

In D21940#479242, @br wrote:

hart ID is recorded to pcpup->pc_hart. Could it be used ? i.e. PCPU_GET(hart) or pcpu_find(cpu)->pc_hart

Thanks, this is what I wanted but I had trouble finding the right function for it. I'll update it later this evening to use this instead.

mhorne added subscribers: philip, nick.Oct 16 2019, 7:59 PM

This is now irrelevant after the rework of D21927.

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sys/

riscv/

include/

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riscv/

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33 lines

Diff 63037

sys/riscv/include/md_var.h

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sys/riscv/riscv/machdep.c

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sys/riscv/riscv/mp_machdep.c

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sys/riscv/riscv/plic.c

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