Skip to content

aarch64: document the CNTFRQ_EL0 #10837

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Rbb666 merged 1 commit into from
Oct 23, 2025
Merged

aarch64: document the CNTFRQ_EL0 #10837

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 4 additions & 1 deletion libcpu/aarch64/common/cpu_gcc.S
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -119,7 +119,10 @@ rt_hw_get_cntpct_val:
ret

/*
*get gtimer frq value
* get gtimer frq value
* According to the document `Arm A-profile Architecture Registers:
* CNTFRQ_EL0, Counter-timer Frequency Register`
* Bits [63:32] are reserved, so only the lower 32 bits take effect.
*/
.globl rt_hw_get_gtimer_frq
rt_hw_get_gtimer_frq:
Expand Down