Re: RPi4B u-boot based booting and hw.cpufreq.voltage_core and dev.cpu.0.freq use: able to use 2000 MHz
Mark Millard via freebsd-arm <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On 2020-Sep-26, at 19:01, Mark Millard <marklmi at yahoo.com> wrote: > On 2020-Sep-26, at 13:20, Mark Millard <marklmi at yahoo.com> wrote: > >> On 2020-Sep-26, at 06:39, tech-lists <tech-lists at zyxst.net> wrote: >> >>> . . . >>> Exellent! On the basis of your post I went ahead and removed from config.txt >>> three lines, then added two and rebooted. >>> >>> It's now this: >>> >>> arm_control=0x200 >>> arm_64bit=1 >>> dtoverlay=disable-bt >>> dtoverlay=mmc >>> device_tree_address=0x4000 >>> kernel=u-boot.bin >>> armstub=armstub8-gic.bin >>> over_voltage=6 >>> arm_freq=2000 >>> >>> before, when it didn't work, it had this: >>> [same as above], apart from >>> gpu_mem=16 >>> over_voltage=6 >>> arm_freq=2100 >>> > Turns out that gpu_mem=32 works for the 8 GiByte RPi4B. (Note: I do have a display connected but no X11m just a console login prompt.) But gpu_mem=16 prevents further I/O to the microsd card during the early RPi stages of things, before FreeBSD is involved: . . . rsc 32 fat-sectors 635 c-count 81269 c-size 2 r-dir 2 r-sec 0 Read config.txt bytes 177 hnd 0x00006938 hash '9be9ccf1915ff016' recover4.elf not found (6) recovery.elf not found (6) start4cd.elf not found (6) start_cd.elf not found (6) Firmware not found ERROR: 00000004 . . . In my context it then tried booting from the USB3 SSD and that worked. (Only the microsd card had gpu_mem=16 but I'm not sure if the config.txt from the USB3 SSD was read or not. The USB3 SSD booting is set up for uefi/ACPI booting experiments. The microsd card was set up for u-boot booting experiments [when it gets that far].) === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar) _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"