[coreboot] [PATCH] workaround for "An unexpected error (805262864) occurred at line 1768 of d:\xpclient\base\boot\setup\arcdisp.c"

Vikram Narayanan vikram186 at gmail.com
Thu May 19 04:38:27 CEST 2011

On Thu, May 19, 2011 at 2:59 AM, Marc Jones <marcj303 at gmail.com> wrote:
> On Wed, May 18, 2011 at 12:40 AM, Scott Duplichan <scott at notabs.org> wrote:
>> The attached patch works around a Windows XP or Server 2003 setup
>> failure where an error message such as:
>> "An unexpected error (805262864) occurred at line 1768 of
>> d:\xpclient\base\boot\setup\arcdisp.c"
>> The value 805262864 varies, and is the physical address, in decimal,
>> of one of the ACPI tables.
>> Tested on Persimmon. Others abuild tested only.
>> Signed-off-by: Scott Duplichan <scott at notabs.org>
>> Detailed explanation: The error message is displayed when a 1024 dword
>> page table array used by setupldr runs out of space. This table is used
>> for mapping various physical addresses, such as those of ACPI tables
>> (a separate table identity maps the lower 16MB used by setupldr code
>> and data). Setupldr only looks at ACPI tables (FACP) to determine make
>> and model of the system. The make and model of the system is needed when
>> setupldr scans the good/bad bios lists contained in txtsetup.sif. The
>> good/bad bios lists are used to bypass installation of the ACPI enabled
>> kernel on certain systems known to have ACPI problems. The code loop
>> that scans the lists creates a new mapping each time it reads an ACPI
>> table, and never frees mappings. The code uses FACP OEM ID to determine
>> the system model. The code sequentially reads tables listed in the RSDT
>> array until the FACP is found. Each read consumes one page table entry.
>> If more that 4 tables precede the FACP in the RSDT array, the 1024
>> entry page table array will run out of space before the good/bad bios
>> list processing completes. BIOS can work around this Windows XP/Server
>> 2003 limitation by placing the FACP early in the RSDT array.
>> Thanks,
>> Scott
> Hi Scott,
> Good find. This must have been a difficult debug.
> It looks like src/mainboard/amd/mahogany/acpi_tables.c has a double
> paste issue. Fix that and it looks good.

Seems to be an issue with the line endings. He could have edited
something in windows and made the patch.


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