Re-use gp register for PCPU.
ClosedPublic
Actions

Authored by br on Feb 3 2016, 3:58 PM.

Tags

None

Referenced Files

	F161938666: D5178.id12974.diff
	Wed, Jul 8, 4:36 AM

	Unknown Object (File)
	Wed, Jun 17, 5:31 PM

	Unknown Object (File)
	May 26 2026, 4:00 PM

	Unknown Object (File)
	May 2 2026, 1:19 AM

	Unknown Object (File)
	May 2 2026, 1:09 AM

	Unknown Object (File)
	May 2 2026, 1:09 AM

	Unknown Object (File)
	Apr 29 2026, 3:29 PM

	Unknown Object (File)
	Apr 29 2026, 3:21 PM

View All Files

Subscribers

None

Details

Reviewers

kib
jhb
andrew

Commits

rS295253: Reuse gp register for pcpu pointer.

Diff Detail

Repository

rS FreeBSD src repository - subversion

Lint

Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

br updated this revision to Diff 12974.Feb 3 2016, 3:58 PM

br retitled this revision from to Re-use gp register for PCPU..

br updated this object.

br edited the test plan for this revision. (Show Details)

br added reviewers: jhb, andrew, kib.

Is gp == sscratch from the RISC-V privileged spec ?

In D5178#110085, @kib wrote:

Is gp == sscratch from the RISC-V privileged spec ?

gp is global pointer (used by compiler in userland only).
sscratch is a temporary register (not related to gp at all).

sscratch is used to exchange kernel/userland SP

Closed by commit rS295253: Reuse gp register for pcpu pointer. (authored by br). · Explain WhyFeb 4 2016, 12:49 PM

This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Path

Size

head/

sys/

riscv/

include/

pcpu.h

7 lines

riscv/

17 lines

1 line

11 lines

23 lines

2 lines

Diff 13004

View Options

head/sys/riscv/include/pcpu.h

View Options

head/sys/riscv/riscv/exception.S

View Options

head/sys/riscv/riscv/genassym.c

View Options

head/sys/riscv/riscv/machdep.c

View Options

head/sys/riscv/riscv/swtch.S

View Options

head/sys/riscv/riscv/vm_machdep.c

Re-use gp register for PCPU.ClosedPublicActions

Details

Diff Detail

Event Timeline

Revision ContentsChangeset List

Diff 13004

head/sys/riscv/include/pcpu.h

head/sys/riscv/riscv/exception.S

head/sys/riscv/riscv/genassym.c

head/sys/riscv/riscv/machdep.c

head/sys/riscv/riscv/swtch.S

head/sys/riscv/riscv/vm_machdep.c

Re-use gp register for PCPU.
ClosedPublic
Actions

Revision Contents
Changeset List