Re: pkg/51103: Updates for ski emulator

[scole_mail%gmx.com@localhost]

The following reply was made to PR pkg/51103; it has been noted by GNATS.

From: scole_mail%gmx.com@localhost
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: pkg/51103: Updates for ski emulator
Date: Fri, 27 May 2016 16:33:17 -0400

 I've been looking at the "Page Not Present" error with ski.  It seems
 that error can be avoided with a small change to
 src/sys/arch/ia64/ia64/vm_machdep.c:
 
 Index: vm_machdep.c
 ===================================================================
 RCS file: /cvsroot/src/sys/arch/ia64/ia64/vm_machdep.c,v
 retrieving revision 1.11
 diff -b -u -r1.11 vm_machdep.c
 --- vm_machdep.c        10 Feb 2011 14:46:46 -0000      1.11
 +++ vm_machdep.c        27 May 2016 20:17:48 -0000
 @@ -84,7 +84,7 @@
      void (*func)(void *), void *arg)
  {
         struct pcb *pcb1, *pcb2;
 -       struct trapframe *tf;
 +       struct trapframe * volatile tf;
  
         pcb1 = lwp_getpcb(l1);
         pcb2 = lwp_getpcb(l2);
 
 
 The bad page access was being cause by a ld8 r15 ....  when
 r15=0. Adding print/debug statements after tf got assigned caused the
 error to go away also.
 
 Here are some results:
 
 scole@dstar:~/nbsd/ski> bski skiload 
 Console: ia64 SKI console
 
 NetBSD/ia64 ia64 SKI boot, Revision 0.1 (Tue May 24 10:59:56 EDT 2016)
 
 
 Type '?' for a list of commands, 'help' for more detailed help.
 OK boot
 8779504+108392+117312 [151226+197880+133066]=0x8f0180
 netbsd entry at 0xe000000004008000
 Entering netbsd at 0xe000000004008000...
 PAL code mapped by the kernel's TR
 PAL Proc at 0xe000000000101790
 SAL Proc at 0xe000000000101890, GP at 0xe0000000001a04b8
 SAL: AP wake-up vector: 0xff
 Platform clock frequency 133338184 Hz
 Processor ratio 11/2, Bus ratio 1/1, ITC ratio 11/2
 MD 0xe0000000001a0060: type 13 pa 0x100000 cnt 0x400
 MD 0xe0000000001a0088: type 7 pa 0x500000 cnt 0x8000
 Descriptor 0xe0000000001a0088 contains kernel
 Loading chunk before kernel: 0x140 / 0x1000
 Loading chunk after kernel: 0x123e / 0x2140
 MD 0xe0000000001a00b0: type 7 pa 0x100000000 cnt 0x4000
 Skipping memory chunk start 0x100000000
 MD 0xe0000000001a00d8: type 12 pa 0xffffc000000 cnt 0x4000
 ptc.e base=0x0, count1=1, count2=1, stride1=0x0, stride2=0x0
 Processor supports 18 Region ID bits
 Trying VHPT size 0x10000
 Putting VHPT at 0xe000000000590000
 vhpt base = e000000000590000 
 vhpt size = 10000 
 Loaded initial symtab at 0xe00000000489f4b8, strtab at 0xe0000000048cf9b0, # entries 8220
 pmap_reference(0xe0000000048609c0)
 Detected memory  = 134217728 (128 MB)
 Physical memory chunk(s):
 0x0000000000588000 - 0x000000000058ffff, 32768 bytes (2 pages)
 0x00000000006c8000 - 0x0000000003ffffff, 59998208 bytes (3662 pages)
 0x00000000048f8000 - 0x00000000084fffff, 62947328 bytes (3842 pages)
 Total number of segments: vm_nphysseg = 3 
 pmap_reference(0xe0000000048609c0)
 Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
     The NetBSD Foundation, Inc.  All rights reserved.
 Copyright (c) 1982, 1986, 1989, 1991, 1993
     The Regents of the University of California.  All rights reserved.
 
 NetBSD 7.99.29 (GENERIC.SKI) #0: Fri May 27 16:09:34 EDT 2016
         scole@dstar:/home/scole/nbsd/src/sys/arch/ia64/compile/obj/GENERIC.SKI
 total memory = 128 MB
 avail memory = 117 MB
 Warning: no FPSWA package supplied
 Table 'APIC' at 0xe00000000011fa00
 pmap_reference(0xe0000000048609c0)
 pmap_reference(0xe0000000048609c0)
 timecounter: Timecounters tick every 10.000 msec
 mainbus0 (root)
 ACPI: RSDP 0x000000000011F9B0 00002C (v02 FBSD  )
 ACPI: XSDT 0x000000000011F9D4 00002C (v00 FBSD   SKI      00000000 FBSD 00000000)
 ACPI BIOS Warning (bug): Incorrect checksum in table [APIC] - 0x00, should be 0x0C (20160422/tbprint-233)
 ACPI: APIC 0x000000000011FA00 000080 (v00 FBSD   SKI      00000000 FBSD 00000000)
 ACPI Exception: AE_NO_ACPI_TABLES, While loading namespace from ACPI tables (20160422/tbxfload-111)
 ACPI Warning: AcpiEnable failed (20160422/utxfinit-184)
 acpi_probe: failed to enable subsystem
 ACPI Error: Could not remove SCI handler (20160422/evmisc-312)
 acpi0 at mainbus0: Intel ACPICA 20160422
 acpi0: X/RSDT: OemId <  FBSD,     SKI,00000000>, AslId <FBSD,00000000>
 ACPI Warning: AcpiEnable failed (20160422/utxfinit-184)
 acpi_attach: failed to initialize ACPI: AE_NO_ACPI_TABLES
 timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
 timecounter: Timecounter "ia64_timecounter" frequency 733360012 Hz quality 100
 rn_init: radix functions require max_keylen be set
 pmap_create()
 WARNING: can't figure what device matches "XXX"
 md0: internal 4096 KB image area
 root on md0a dumps on md0b
 cannot mount root, error = 22
 root device (default md0a): 
 
 -----------------------------------------------------------------
 Just for a quick test,  I tried to boot real hardware and no longer got
 the same "Page Not Present Error" (http://gnats.netbsd.org/49717), but
 this new one:
 
 [dmesg snipped...]
 acpi0 at mainbus0: Intel ACPICA 20160422
 acpi0: X/RSDT: OemId <    HP,  rx2600,00000000>, AslId <  HP,00000000>
 
 fatal kernel trap (cpu 0):
 
     trap vector = 0x1e (Unaligned Reference)
     cr.iip      = 0xe00000000406fe20
     cr.ipsr     = 0x1010080a2010 (mfl,ic,dt,dfh,rt,cpl=0,it,ri=0,bn)
     cr.isr      = 0x400000000 (code=0,vector=0,r,ei=0)
     cr.ifa      = 0xc0000000ff5c1016
     curlwp   = 0xe000000004476ac0
         pid = 0, comm = system
 
 Stopped in pid 0.1 (system) at  netbsd:AcpiOsReadMemory+0x160:  [M0]    ld4.acq r
 14=r8
 db> 
 
 Anyway, I guess that is some small progess.
 
 I'm not sure how much needs to be done with pmap if anything, but there
 seems like there is still much unfinished besides that.  I'll post on
 the ia64 list from now on unless I find more ski issues.
 
 Thanks