Re: port-macppc/59331: macppc now panics early in QEMU, regression since 9.x

["Izumi Tsutsui via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR port-macppc/59331; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-macppc/59331: macppc now panics early in QEMU, regression
	 since 9.x
Date: Sun, 20 Apr 2025 04:23:04 +0900

 > https://github.com/alarixnia/mkimg-netbsd
 > 
 > However, since 10.0, macppc now panics on boot:
 > 
 > [   1.0000000] NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024
 > [   1.0000000]  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/macppc/compile/GENERIC
 > [   1.0000000] total memory = 512 MB
 > [   1.0000000] avail memory = 474 MB
 > [   1.0000000] trap: kernel read DSI trap @ 0x1fc5a62c by 0xfff0bedc (DSISR 0x40000000, err=14), lr 0xfff0bed8
 > [   1.0000000] panic: trap
 
 It looks "-m 512" causes the panic but "-m 256" works.
 (per quick bisect "-m 260" fails and "-m 259" works)
 
 On the other hand, 10.0 worked on my (real) G4 with 1024MB
 so maybe some QEMU issue?
 
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 NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024
 	mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/macppc/compile/GENERIC
 total memory = 1024 MB
 oea_startup: failed to allocate DEAD ZONE: error=12
 avail memory = 977 MB
 timecounter: Timecounters tick every 10.000 msec
 Kernelized RAIDframe activated
 found openpic PIC at 80040000
 OpenPIC Version 1.2: Supports 4 CPUs and 64 interrupt sources.
 bootpath: /pci@f2000000/@d/mac-io@7/ata-4@1f000/disk@1:0/netbsd
 mainbus0 (root)
 cpu0 at mainbus0: 7400 (Revision 2.9), ID 0 (primary)
 cpu0: HID0 0x8094c0a4<EMCP,DOZE,DPM,EIEC,ICE,DCE,SGE,BTIC,BHT>, powersave: 1
 cpu0: 400.00 MHz, no-parity 1MB WB L2 cache (PB SRAM) at 2:1 ratio
 memory0 at mainbus0: len=512
 spdmem0 at memory0
 spdmem0: SDRAM, no parity or ECC, 256MB, 133MHz (PC-133)
 spdmem0: 12 rows, 10 cols, 2 banks, 4 banks/chip, 7.5ns cycle time
 spdmem0: tAA-tRCD-tRP-tRAS: 3-20-20-45
 spdmem0: voltage LvTTL (not 5V tolerant), refresh time 15.625us (self-refreshing)
 
  :
 
 ---
 Izumi Tsutsui