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Re: NetBSD/arc on MIPS Magnum, was Re: [PATCH 00/10] Fixes for DP8393X S

From: Finn Thain
Subject: Re: NetBSD/arc on MIPS Magnum, was Re: [PATCH 00/10] Fixes for DP8393X SONIC device emulation
Date: Tue, 7 Jan 2020 09:15:26 +1100 (AEDT)

On Tue, 24 Dec 2019, address@hidden wrote:

> > 
> > I haven't tried the latest iso (9.0-rc1).
> > 

I found that NetBSD 9.0-rc1 has the same regressions.

> Hello Finn,
> Thanks for finding the required steps to boot NetBSD on MIPS Magnum. I 
> was trying to find how to let it work on non-configured machine since 
> some days!
> You indeed need my patch at
> https://lists.gnu.org/archive/html/qemu-devel/2019-12/msg05037.html

Thanks. As it turned out, I didn't need that patch in order to get 
NetBSD/arc 5.1 working. But I applied the patch anyway after I found that 
a Linux/mips kernel produced DMA errors. But the errors remain (see 

With a few minor Linux patches and a mipsel busybox build, I was able to 
boot to a prompt. ESP SCSI works, but not SONIC ethernet. My dp8393x patch 
series was not sufficient to make ethernet work (no regression though).

NetBSD/arc Bootstrap, Revision 1.1
(address@hidden, Sat Nov  6 14:06:36 UTC 2010)
devopen: scsi(0)cdrom(4)fdisk(0) type disk file vmlinux
5991052+141348 [656192+872841]=0x74eb98
Linux version 5.4.0-00003-g34add35b08c0 (fthain@nippy) (gcc version 4.6.4 
(btc)) #24 Mon Jan 6 20:10:57 AEDT 2020
ARCH: Microsoft-Jazz
PROMLIB: ARC firmware Version 1 Revision 2
CPU0 revision is: 00000400 (R4000PC)
FPU revision is: 00000500
printk: debug: ignoring loglevel setting.
Primary instruction cache 8kB, VIPT, direct mapped, linesize 16 bytes.
Primary data cache 8kB, direct mapped, VIPT, cache aliases, linesize 16 bytes
Zone ranges:
  DMA      [mem 0x0000000000000000-0x0000000000ffffff]
  Normal   [mem 0x0000000001000000-0x0000000007ffffff]
Movable zone start for each node
Early memory node ranges
  node   0: [mem 0x0000000000000000-0x0000000007ffffff]
Initmem setup node 0 [mem 0x0000000000000000-0x0000000007ffffff]
On node 0 totalpages: 32768
  DMA zone: 32 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 4096 pages, LIFO batch:0
  Normal zone: 224 pages used for memmap
  Normal zone: 28672 pages, LIFO batch:7
pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
pcpu-alloc: [0] 0
Built 1 zonelists, mobility grouping on.  Total pages: 32512
Kernel command line: scsi(0)cdrom(4)fdisk(0)vmlinux root=/dev/sda rw 
ignore_loglevel ip= init=/bin/sh
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
mem auto-init: stack:off, heap alloc:off, heap free:off
Memory: 123396K/131072K available (4716K kernel code, 168K rwdata, 812K rodata, 
184K init, 100K bss, 7676K reserved, 0K cma-reserved)
NR_IRQS: 128
random: get_random_bytes called from start_kernel+0x32c/0x4e0 with crng_init=0
Console: colour dummy device 80x25
sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 
Calibrating delay loop... 990.41 BogoMIPS (lpj=4952064)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
devtmpfs: initialized
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 
19112604462750000 ns
futex hash table entries: 256 (order: -1, 3072 bytes, linear)
NET: Registered protocol family 16
VDMA: R4030 DMA pagetables initialized.
SCSI subsystem initialized
NET: Registered protocol family 2
tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes, linear)
TCP: Hash tables configured (established 1024 bind 1024)
UDP hash table entries: 256 (order: 0, 4096 bytes, linear)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear)
NET: Registered protocol family 1
workingset: timestamp_bits=30 max_order=15 bucket_order=0
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
io scheduler mq-deadline registered
io scheduler kyber registered
Console: switching to colour frame buffer device 100x37
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
printk: console [ttyS0] disabled
serial8250.0: ttyS0 at MMIO 0xe0006000 (irq = 32, base_baud = 115200) is a 
printk: console [ttyS0] enabled
serial8250.0: ttyS1 at MMIO 0xe0007000 (irq = 33, base_baud = 115200) is a 
loop: module loaded
jazz_esp jazz_esp.0: esp0: regs[(ptrval):(ptrval)] irq[29]
jazz_esp jazz_esp.0: esp0: is a FAS100A, 40 MHz (ccf=0), SCSI ID 7
random: fast init done
scsi host0: esp
scsi 0:0:0:0: Direct-Access     QEMU     QEMU HARDDISK    2.5+ PQ: 0 ANSI: 5
scsi target0:0:0: Beginning Domain Validation
scsi target0:0:0: Domain Validation skipping write tests
scsi target0:0:0: Ending Domain Validation
scsi 0:0:2:0: CD-ROM            QEMU     QEMU CD-ROM      2.5+ PQ: 0 ANSI: 5
scsi target0:0:2: Beginning Domain Validation
scsi target0:0:2: Domain Validation skipping write tests
scsi target0:0:2: Ending Domain Validation
scsi 0:0:4:0: CD-ROM            QEMU     QEMU CD-ROM      2.5+ PQ: 0 ANSI: 5
scsi target0:0:4: Beginning Domain Validation
scsi target0:0:4: Domain Validation skipping write tests
scsi target0:0:4: Ending Domain Validation
sd 0:0:0:0: [sda] 120000 512-byte logical blocks: (61.4 MB/58.6 MiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 63 00 00 08
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support 
SONIC ethernet @e0001000, MAC 01:00:1c:00:01:00, IRQ 28
serio: i8042 KBD port at 0xe0005000,0xe0005001 irq 30
serio: i8042 AUX port at 0xe0005000,0xe0005001 irq 31
NET: Registered protocol family 10
Segment Routing with IPv6
sd 0:0:0:0: [sda] Attached SCSI disk
sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
input: AT Raw Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
input: ImExPS/2 Generic Explorer Mouse as 
EXT4-fs (sda): warning: mounting unchecked fs, running e2fsck is recommended
EXT4-fs (sda): mounted filesystem without journal. Opts: (null)
VFS: Mounted root (ext4 filesystem) on device 8:0.
Freeing prom memory: 376k freed
Freeing prom memory: 60k freed
Freeing prom memory: 4k freed
Freeing unused kernel memory: 184K
This architecture does not have kernel memory protection.
Run /bin/sh as init process
VDMA: Channel 0: Address error!
VDMA: Channel 0: Memory error!

The patches may be found at,


I'll post them when I've finished testing.

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