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When I was running linux kernel on sifive unmatched board, I found that get_cycles() always return 0, this function will return the value of CSR_TIME register, It shouldn‘t be zero. but the CSR_CYCLE can be read and working properly.
By reading the SiFive FU740-C000 Manual. I realized that RTC may need a battery, and the problem persisted even after the battery was installed.
Then I add those code in Opensbi:
jj_mtime_addr = 0x0200_BFF8 (mtime register addr in clint)
And error occurs:
I don‘t known why CSR_TIME can't be access.
please help me
The text was updated successfully, but these errors were encountered:
When I was running linux kernel on sifive unmatched board, I found that get_cycles() always return 0, this function will return the value of CSR_TIME register, It shouldn‘t be zero. but the CSR_CYCLE can be read and working properly.
By reading the SiFive FU740-C000 Manual. I realized that RTC may need a battery, and the problem persisted even after the battery was installed.
Then I add those code in Opensbi:
jj_mtime_addr = 0x0200_BFF8 (mtime register addr in clint)
And error occurs:
I don‘t known why CSR_TIME can't be access.
please help me
The text was updated successfully, but these errors were encountered: