amd64/111952: Boot panic due to missing BIOS smap on install cds (HP dc5750 SFF)

[Eamon A.Roque]

The following reply was made to PR amd64/111952; it has been noted by GNATS.

From: "Eamon A.Roque" <Eamon.Roque at arf.fak12.uni-muenchen.de>
To: bug-followup at FreeBSD.org,
    Eamon.Roque at arf.fak12.uni-muenchen.de
Cc:  
Subject: Re: amd64/111952: Boot panic due to missing BIOS smap on install
	cds (HP dc5750 SFF)
Date: Fri, 06 Jul 2007 14:18:33 +0200

 Hi,
 
 as Ralf also said, Linux can read the memory map from the BIOS.
 
 Here's the output from my current system:
 
 Linux version 2.6.21-ARCH (root at firefly) (gcc version 4.2.0) #1 SMP
 PREEMPT Tue Jun 12 02:55:15 CEST 2007
 Command line: root=/dev/sda6 ro
 BIOS-provided physical RAM map:
  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
  BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
  BIOS-e820: 0000000000100000 - 000000007feb7f00 (usable)
  BIOS-e820: 000000007feb7f00 - 0000000080000000 (reserved)
  BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
  BIOS-e820: 00000000fec00000 - 00000000fed40000 (reserved)
  BIOS-e820: 00000000fed45000 - 0000000100000000 (reserved)
 Entering add_active_range(0, 0, 159) 0 entries of 256 used
 Entering add_active_range(0, 256, 523959) 1 entries of 256 used
 end_pfn_map = 1048576
 DMI 2.4 present.
 ACPI: RSDP 000E7610, 0014 (r0 COMPAQ)
 ACPI: RSDT 7FEC7F40, 0038 (r1 HPQOEM SLIC-BPC 20070518             0)
 ACPI: FACP 7FEC7FE8, 0074 (r1 COMPAQ HP_RS485        1             0)
 ACPI: DSDT 7FEC8343, 9268 (r1 COMPAQ DSDT_PRJ        1 MSFT  100000E)
 ACPI: FACS 7FEC7F00, 0040
 ACPI: APIC 7FEC805C, 0068 (r1 COMPAQ HP_RS485        1             0)
 ACPI: ASF! 7FEC80C4, 0063 (r32 COMPAQ HP_RS485        1             0)
 ACPI: MCFG 7FEC8127, 003C (r1 COMPAQ HP_RS485        1             0)
 ACPI: TCPA 7FEC8163, 0032 (r1 COMPAQ HP_RS485        1             0)
 Entering add_active_range(0, 0, 159) 0 entries of 256 used
 Entering add_active_range(0, 256, 523959) 1 entries of 256 used
 No mptable found.
 Zone PFN ranges:
   DMA             0 ->     4096
   DMA32        4096 ->  1048576
   Normal    1048576 ->  1048576
 early_node_map[2] active PFN ranges
     0:        0 ->      159
     0:      256 ->   523959
 On node 0 totalpages: 523862
   DMA zone: 56 pages used for memmap
   DMA zone: 1076 pages reserved
   DMA zone: 2867 pages, LIFO batch:0
   DMA32 zone: 7107 pages used for memmap
   DMA32 zone: 512756 pages, LIFO batch:31
   Normal zone: 0 pages used for memmap
 
 
 6-Stable can only see 64MB of this by default. With ACPI enabled, the
 kernel panics, just like with the previously mentioned boot cds.
 
 HTH
 
 Eamon Roque
 
 
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 Eamon Roque
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 Roque at itg.uni-muenchen.de