Re: Pandaboard ES

[Rui-Xiang Guo <rxg%lavabit.com@localhost>]

On Mon, May 01, 2023 at 07:31:07AM -0300, Jared McNeill wrote:
> The PANDABOARD kernel relies on firmware to program the base address of the
> GIC and local timers correctly in the CBAR cp15 register. Likely the reason
> that the GIC driver did not discover any valid sources:

I find the singularity in the early boot log:
[   1.0000000] NetBSD 9.4 (PANDABOARD) #0: Sat Apr 20 13:32:22 UTC 2024
[   1.0000000]  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/evbarm/compile/PANDABOARD
[   1.0000000] total memory = 1024 MB
[   1.0000000] avail memory = 1006 MB
[   1.0000000] mainbus0 (root)
[   1.0000000] cpu0 at mainbus0 core 0: 699 MHz Cortex-A9 r2p10 (Cortex V7A core)
[   1.0000000] cpu0: DC enabled IC enabled WB enabled LABT branch prediction enabled
[   1.0000000] cpu0: 32KB/32B 4-way L1 VIPT Instruction cache
[   1.0000000] cpu0: 32KB/32B 4-way write-back-locking-C L1 PIPT Data cache
[   1.0000000] cpu0: 64KB/32B 8-way write-through L2 PIPT Unified cache
[   1.0000000] vfp0 at cpu0: NEON MPE (VFP 3.0+), rounding, NaN propagation, denormals
[   1.0000000] armperiph0 at mainbus0
[   1.0000000] arml2cc0 at armperiph0: ARM PL310 r0p0 L2 Cache Controller (disabled)

It means the L2 cache id returns 0 through bus_space_read_4().

By comparing against OpenBSD 7.5:
OpenBSD 7.5 (RAMDISK) #157: Sat Mar 23 20:49:21 MDT 2024
    deraadt%armv7.openbsd.org@localhost:/usr/src/sys/arch/armv7/compile/RAMDISK
real mem  = 895275008 (853MB)
avail mem = 860352512 (820MB)
random: boothowto does not indicate good seed
mainbus0 at root: TI OMAP4 PandaBoard-ES
cpu0 at mainbus0 mpidr 0: ARM Cortex-A9 r2p10
cpu0: 32KB 32b/line 4-way L1 VIPT I-cache, 32KB 32b/line 4-way L1 D-cache
cortex0 at mainbus0
amptimer0 at cortex0: 396000 kHz
armliicc0 at cortex0: rtl 7 waymask: 0x0000000f

It returns 7. I test them with the same u-boot.
So, what went wrong?

-rxg