Re: port-macppc/54432: powerpc mac mini detects only 512MB of 1GB memory

[Paul Goyette <paul%whooppee.com@localhost>]

...
> 	One of my mac minis were recently upgraded to 9.0_BETA.
> 	It has a 1GB DIMM installed, but NetBSD only probes 512MB.
>
> 	The start of dmesg shows this:
>
> NetBSD 9.0 (GRANNY-SMITH) #0: Fri Aug  2 14:23:09 CEST 2019
>        he%granny-smith.urc.uninett.no@localhost:/usr/obj/sys/arch/macppc/compile/GRANNY-SMITH
> total memory = 512 MB
> avail memory = 482 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@f4000000/ata-6@d/disk@0:0/netbsd
> mainbus0 (root)
> cpu0 at mainbus0: 7447A (Revision 1.5), ID 0 (primary)
> cpu0: HID0 0x84d0c1bc<EMCP,TBEN,HIGH_BAT_EN,NAP,DPM,ICE,DCE,XBSEN,SGE,BTIC,LRSTK,FOLD,BHT>, powersave: 1
> cpu0: 1500.00 MHz, 512KB L2 cache no parity
> memory0 at mainbus0: len=128
> spdmem0 at memory0
> spdmem0: DDR SDRAM, no parity or ECC, 1GB, 400MHz (PC-3200)
> spdmem0: 13 rows, 11 cols, 2 ranks, 4 banks/chip, 5.0ns cycle time
> spdmem0: tAA-tRCD-tRP-tRAS: 2-3-3-8
> spdmem0: voltage SSTL 2.5V, refresh time 7.8us (self-refreshing)
...

Interestingly, even though it only detects 512MB of memory, the SPD
data correctly shows the DIMM's capacity.


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