Re: New pmap status update

thorpej@ wrote:

> > Yes, looks like it's __cpu_simple_lock() and/or
> > __cpu_simple_lock_try().  I'll add a __HAVE_M68K_BROKEN_RMC check
> > in <m68k/lock.h> and make it use _atomic_cas_32() in that case.
> 
> Ok, this one is a little annoying because __cpu_simple_lock_t is
> 8-bit, and I need a 32-bit datum for the kernel restartable atomic
> sequence.
> 
>     https://www.netbsd.org/~thorpej/m68k-simple-lock-rmc-fix.txt
> 
> I'm not entirely satisfied with that solution, if only because
> it feels a little gross.

Also tried on HP319C with the patch (traditional pmap).
No panic, but stalls before init(8) starts:

---
>> NetBSD/hp300 Primary Boot, Revision 1.22 (Sat May 31 17:00:41 UTC 2025) (from NetBSD 10.99.14)
>> HP 9000/318/319/330 SPU
>> Enter "reset" to reset system.
Boot: [[[le0a:]netbsd][-a][-c][-d][-s][-v][-q]] :- le0a:netbsd.small020 -s
WARNING: bad date in battery clock
boot: client IP address: 192.168.20.74 
root addr=192.168.20.1 path=/r/export/NetBSD/hp300/root
2292116+99012 [211280+198022]=0x2abf50
Start @ 0xff803000 [1=0xffa49c58-0x2abf50]...
Entry point: 0xff803000
[   1.0000000] bootinfo found at 0xff802000
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[   1.0000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
[   1.0000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
[   1.0000000]     2024, 2025
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 11.99.4 (SMALL020) #1: Mon Dec 15 23:11:00 JST 2025
[   1.0000000]  tsutsui@mirage:/s/tsutsui/netbsd/src/sys/arch/hp300/compile/SMALL020
[   1.0000000] HP 9000/318/319/330 (16.67MHz MC68020 CPU, MC68851 MMU, 16.67MHz MC68881 FPU)
[   1.0000000] total memory = 8180 KB
[   1.0000000] avail memory = 4552 KB
[   1.0000000] mainbus0 (root)
[   1.0000000] intio0 at mainbus0
[   1.0000000] rtc0 at intio0 addr 0x420000
[   1.0000000] hil0 at intio0 addr 0x428000 ipl 1
[   1.0000000] nhpib1 at intio0 addr 0x478000 ipl 3: internal HP-IB
[   1.0000000] hpibbus1 at nhpib1
[   1.0000000] dma0 at intio0 addr 0x500000 ipl 1: 98620C, 2 channels, 32-bit DMA
[   1.0000000] topcat0 at intio0 addr 0x560000: 1024x768x6 HP98549 catseye frame buffer
[   1.0000000] wsdisplay0 at topcat0 kbdmux 1
[   1.0000000] dio0 at mainbus0
[   1.0000000] com0 at dio0 scode 9 ipl 5: ns8250 or ns16450, no fifo
[   1.0000000] com0: console
[   1.0000000] fhpib0 at dio0 scode 14 ipl 4: 98625A/98625B HP-IB
[   1.0000000] hpibbus2 at fhpib0
[   1.0000000] le0 at dio0 scode 21 ipl 5: address 08:00:09:02:6a:99
[   1.0000000] le0: 8 receive buffers, 2 transmit buffers
[   1.0000000] WARNING: system needs entropy for security; see entropy(7)
[   2.1739310] hil0: no devices
[   5.7425990] boot device: le0
[   5.7625870] root on le0
[   5.7875790] nfs_boot: trying DHCP/BOOTP
[   8.8710910] nfs_boot: DHCP next-server: 192.168.20.1
[   8.8866790] nfs_boot: my_domain=ceres.dti.ne.jp
[   8.9010870] nfs_boot: my_addr=192.168.20.74
[   8.9209790] nfs_boot: my_mask=255.255.255.0
[   8.9409710] nfs_boot: gateway=192.168.20.1
[  15.1884790] root on mirage:/r/export/NetBSD/hp300/root
[  15.2043710] root file system type: nfs
[  15.2096830] kern.module.path=/stand/hp300/11.99.4/modules
[  15.2684630] WARNING: preposterous TOD clock time
[  15.2830150] WARNING: using filesystem time
[  15.2923830] WARNING: CHECK AND RESET THE DATE!
[  23.1255950] entropy: best effort
---

I can enter ddb by break, and backtrace shows:
---
Stopped in pid 1.1 (init) at    netbsd:cpu_Debugger+0x6:        unlk    a6
db> bt
cpu_Debugger(5,0,a,1,0) + 6
comintr(1322340) + 36e
m68k_intr_autovec(0,2004,1349100,13a3f98,20040011) + 56
intrstub_autovec(?)
lwp_unlock(1317280) + a
sigpost(?)
sched_tick(1349100,0,103,a) + 146
kpsignal2(137a020,3c90ec8,80,1c5e8,3c8f000) + 2c0
trapsignal(1349100,3c90ec8) + 24a
trap(3c90f60,0,1c1,10018f14) + 438
faultstkadj() + 4
db> 


---
Izumi Tsutsui