On Tue, Jul 25, 2023 at 09:10:06AM +0100, Conor Dooley wrote: > Hey Guo Ren, > > On Tue, Jul 25, 2023 at 08:52:09AM +0100, Conor Dooley wrote: > > On Tue, Jul 25, 2023 at 03:38:58PM +0800, Xi Ruoyao wrote: > > > On Sun, 2023-06-18 at 00:15 +0800, Jisheng Zhang wrote: > > > > Sipeed's Lichee Pi 4A development board uses Lichee Module 4A core > > > > module which is powered by T-HEAD's TH1520 SoC. Add minimal device > > > > tree files for the core module and the development board. > > > > > > > > Support basic uart/gpio/dmac drivers, so supports booting to a basic > > > > shell. > > > > > > Thanks for the excellent work, but when I tried to boot Linux 6.5.0-rc3 > > > on my Lichee Pi 4A it fails with: > > > > > > ## Flattened Device Tree blob at 01f00000 > > > Booting using the fdt blob at 0x1f00000 > > > Using Device Tree in place at 0000000001f00000, end 0000000001f050c4 > > > > > > Starting kernel ... > > > > > > [ 0.000000] Linux version 6.5.0-rc3 (lfs@stargazer) (riscv64-lfs-linux-gnu-gcc (GCC) 13.1.0, GNU ld (GNU Binutils) 2.40) #1 SMP PREEMPT Tue Jul 25 13:38:20 CST 2023 > > > [ 0.000000] Machine model: Sipeed Lichee Pi 4A > > > [ 0.000000] SBI specification v0.3 detected > > > > [ 0.000000] SBI implementation ID=0x1 Version=0x9 > > > > [ 0.000000] Oops - load access fault [#1] > > > [ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.5.0-rc3 #1 > > > [ 0.000000] Hardware name: Sipeed Lichee Pi 4A (DT) > > > [ 0.000000] epc : __plic_toggle+0x5a/0x62 > > > [ 0.000000] ra : __plic_init.isra.0+0x2d0/0x462 > > > [ 0.000000] epc : ffffffff802ce8ec ra : ffffffff80618816 sp : ffffffff80e03c90 > > > [ 0.000000] gp : ffffffff80ec5bb8 tp : ffffffff80e10d40 t0 : ffffffd900045940 > > > [ 0.000000] t1 : 0000000000000002 t2 : ffffffd90004a10c s0 : ffffffd9fef6ed68 > > > [ 0.000000] s1 : ffffffd900045680 a0 : ffffffc801002080 a1 : 0000000000000002 > > > [ 0.000000] a2 : 0000000000000000 a3 : 00000000000000f4 a4 : 0000000000000001 > > > [ 0.000000] a5 : 0000000000000000 a6 : 0000000000000b40 a7 : ffffffd900045940 > > > [ 0.000000] s2 : ffffffd9fef6ed78 s3 : ffffffff80ef9630 s4 : 0000000000000001 > > > [ 0.000000] s5 : ffffffd9ffff5af8 s6 : 0000000000000001 s7 : ffffffff80815d68 > > > [ 0.000000] s8 : 0000000000000008 s9 : 0000000000000000 s10: ffffffff80815d68 > > > [ 0.000000] s11: ffffffff80b1b1b8 t3 : ffffffff80c003d0 t4 : 0000000000000001 > > > [ 0.000000] t5 : 0000000000000003 t6 : 0000000000000001 > > > [ 0.000000] status: 8000000201800100 badaddr: 000000ffd8002080 cause: 0000000000000005 > > > [ 0.000000] [<ffffffff802ce8ec>] __plic_toggle+0x5a/0x62 > > > [ 0.000000] [<ffffffff8061ffc8>] of_irq_init+0x14a/0x248 > > > [ 0.000000] [<ffffffff80600a7e>] start_kernel+0x40c/0x6fe > > > [ 0.000000] [<ffffffff806034f6>] init_IRQ+0xc6/0x100 > > > [ 0.000000] [<ffffffff80600a7e>] start_kernel+0x40c/0x6fe > > > [ 0.000000] Code: 0007 c319 9123 00e7 8082 000f 0140 411c 000f 0820 (c593) fff5 > > > [ 0.000000] ---[ end trace 0000000000000000 ]--- > > > [ 0.000000] Kernel panic - not syncing: Fatal exception in interrupt > > > > > > I guess I'm either using some unsupported configuration or making some > > > stupid mistakes, but I cannot find any documentation about how to > > > configure the mainline kernel for Lichee Pi 4A properly. Could you give > > > some pointers? > > > > Are you using the vendor OpenSBI? IIRC, and the lads can probably > > correct me here, you need to have an OpenSBI that contains > > https://github.com/riscv-software-src/opensbi/commit/78c2b19218bd62653b9fb31623a42ced45f38ea6 > > which the vendor supplied OpenSBI does not have. > > Guo Ren, can you try to get this sorted out? The T-Head SDK seems to be > shipping stuff that is several years old, so new SoCs from vendors that > have used your SDK are unable to run mainline kernels (and therefore > mainstream distros), without a firmware update. > > The TH1520 branch on github, seems to be based on OpenSBI v0.9: > > > [ 0.000000] SBI implementation ID=0x1 Version=0x9 > https://github.com/T-head-Semi/opensbi/blob/4e77060e0512ad981eee55d5a2501f6d88a41fd9/include/sbi/sbi_version.h#L13 > OpenSBI v0.9 was released on the 18/01/2021: > https://github.com/riscv-software-src/opensbi/releases/tag/v0.9 > The "fix" I linked above was included in v1.0, released on 24/12/2021. > > I think it is hitting here for the Lichee Pi4a, but I know the same > thing has happened to the BeagleV Ahead, and I figure it'll impact > other SoCs going forward too. I ran into the access fault in the PLIC code when I first attempted to run mainline Linux on the BeagleV Ahead. I switched from the vendor OpenSBI v0.9 to uptream OpenSBI v1.3 and the PLIC oops went away. For reference, my boot log when using OpenSBI v1.3: https://gist.github.com/pdp7/23259595a7570f1f11086d286e16dfb6 And my device tree patch which essentially just adjusts the memory node to match the amount of DDR in the BeagleV Ahead versus the lpi4a that Jisheng has: https://lore.kernel.org/linux-riscv/20230722-upstream-beaglev-ahead-dts-v2-0-a470ab8fe806@xxxxxxxxxxxx/ -Drew
