Problems with AMD64 and 8 GB RAM?

[Greg 'groggy' Lehey]

On Wednesday, 30 March 2005 at 22:27:43 -0700, Scott Long wrote:
> Jon Noack wrote:
>> On 03/30/05 23:14, Greg 'groggy' Lehey wrote:
>>> On Wednesday, 30 March 2005 at 21:28:36 -0700, Scott Long wrote:
>>>> Greg 'groggy' Lehey wrote:
>>>>> On Wednesday, 30 March 2005 at 23:01:03 -0500, John Baldwin wrote:
>>>>>> It would be interesting to see the contents of your MADT to see if
>>>>>> it's trying to use a 64-bit PA for your APIC.
>>>>>
>>>>> Any suggestions about how to do so?
>>>>
>>>> man acpidump
>>>
>>> How do you run that on a system that won't boot?
>>
>> You said the system worked with 4 GB (albeit detecting only 3.5
>> GB).

Yes, this is correct.  A number of people have explained why it only
detected 3.5 GB in this configuration.

>> My perception of this whole ACPI thing is that it is fixed in your
>> BIOS (although it can be overridden by the OS).  As such, the
>> amount of RAM you have in the machine shouldn't change acpidump
>> results.  Is that not correct?
>
> This is absolutely correct.

Ah, so you meant to say that the output from the system running with 4
GB memory is useful?  That wasn't in the man page you pointed to.
What it does say is:

> When invoked with the -t flag, the acpidump utility dumps contents of
> the following tables:
>
> ...       MADT

This may be the case, but between man page and output some terminology
must have changed.  I can't see any reference to anything like an MADT
there.  Does that mean that there isn't one, or that ACPI can't find
it, or does the section APIC refer to/dump the MADT?  Here's the
complete output of acpidump -t, anyway:

/*
  RSD PTR: OEM=VIAK8, ACPI_Rev=1.0x (0)
        RSDT=0xdfee3000, cksum=97
 */
/*
  RSDT: Length=44, Revision=1, Checksum=4,
        OEMID=VIAK8, OEM Table ID=AWRDACPI, OEM Revision=0x42302e31,
        Creator ID=AWRD, Creator Revision=0x0
        Entries={ 0xdfee3040, 0xdfee7b40 }
 */
/*
  FACP: Length=116, Revision=1, Checksum=255,
        OEMID=VIAK8, OEM Table ID=AWRDACPI, OEM Revision=0x42302e31,
        Creator ID=AWRD, Creator Revision=0x0
        FACS=0xdfee0000, DSDT=0xdfee30c0
        INT_MODEL=PIC
        Preferred_PM_Profile=Unspecified (0)
        SCI_INT=9
        SMI_CMD=0x402f, ACPI_ENABLE=0xa1, ACPI_DISABLE=0xa0, S4BIOS_REQ=0x0
        PSTATE_CNT=0x0
        PM1a_EVT_BLK=0x4000-0x4003
        PM1a_CNT_BLK=0x4004-0x4005
        PM_TMR_BLK=0x4008-0x400b
        GPE0_BLK=0x4020-0x4023
        P_LVL2_LAT=101 us, P_LVL3_LAT=1001 us
        FLUSH_SIZE=0, FLUSH_STRIDE=0
        DUTY_OFFSET=0, DUTY_WIDTH=1
        DAY_ALRM=125, MON_ALRM=126, CENTURY=50
        IAPC_BOOT_ARCH=
        Flags={WBINVD,PROC_C1,SLP_BUTTON,RTC_S4,RESET_REG}
        RESET_REG=0x00000000:0[0] (Memory), RESET_VALUE=0x44
 */
/*
  FACS: Length=64, HwSig=0x00000000, Firm_Wake_Vec=0x00000000
        Global_Lock=
        Flags=
        Version=0
 */
/*
  DSDT: Length=19020, Revision=1, Checksum=28,
        OEMID=VIAK8, OEM Table ID=AWRDACPI, OEM Revision=0x1000,
        Creator ID=MSFT, Creator Revision=0x100000e
 */
/*
  APIC: Length=104, Revision=1, Checksum=145,
        OEMID=VIAK8, OEM Table ID=AWRDACPI, OEM Revision=0x42302e31,
        Creator ID=AWRD, Creator Revision=0x0
        Local APIC ADDR=0xfee00000
        Flags={PC-AT}

        Type=Local APIC
        ACPI CPU=0
        Flags={ENABLED}
        APIC ID=0

        Type=Local APIC
        ACPI CPU=1
        Flags={ENABLED}
        APIC ID=1

        Type=IO APIC
        APIC ID=2
        INT BASE=0
        ADDR=0x00000000fec00000

        Type=INT Override
        BUS=0
        IRQ=0
        INTR=2
        Flags={Polarity=conforming, Trigger=conforming}

        Type=INT Override
        BUS=0
        IRQ=9
        INTR=9
        Flags={Polarity=active-lo, Trigger=level}

        Type=Local NMI
        ACPI CPU=0
        LINT Pin=1
        Flags={Polarity=active-hi, Trigger=edge}

        Type=Local NMI
        ACPI CPU=1
        LINT Pin=1
        Flags={Polarity=active-hi, Trigger=edge}
 */

Since I don't know anything about ACPI, this doesn't say too much to
me.  Suggestions welcome.  If the APIC section is the MADT, it looks
as if we should update the docco.

Greg
-- 
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