https://bugzilla.kernel.org/show_bug.cgi?id=16548
--- Comment #19 from Lin Ming <ming.m....@intel.com> 2010-10-08 03:00:34 ---
Name (SSDT, Package (0x0C)
{
"CPU0IST ",
0x7D5B3520,
0x00000475,
"APIST ",
0x7D368CA0,
0x000001CF,
"CPU0CST ",
0x7D398020,
0x00000C78,
"APCST ",
0x7D422720,
0x0000008D
})
[ 0.000000] BIOS-e820: 0000000000100000 - 000000007d6a1000 (usable)
The ACPI tables should be put in the reserved memory, but as above shows, all
SSDTs are put in the normal RAM.
This causes below ioremap code returns NULL.
for (pfn = phys_addr >> PAGE_SHIFT; pfn <= last_pfn; pfn++) {
int is_ram = page_is_ram(pfn);
if (is_ram && pfn_valid(pfn) &&
!PageReserved(pfn_to_page(pfn)))
return NULL;
WARN_ON_ONCE(is_ram);
}
Roman,
Could you boot 2.6.36-rc5 with blow kernel option and attach the dmesg again?
memmap=2352K#0x7D368000
This will mark memory from 0x7D368000 to 0x7D5B4000 as ACPI data.
Thanks.
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