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Make the default memory range in the top 2GB of ram in the hopes that

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this more accurately reflects what the underlying hardware of most
acpi machines that don't have children pci busses.

We still need a better way to get this information from acpi/hardware.
This commit is contained in:
Warner Losh 2004-07-04 16:23:25 +00:00
parent 2af417add4
commit dfbaec0a6d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131577
1 changed files with 5 additions and 3 deletions
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8
sys/dev/acpica/acpi_pcib_acpi.c
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@ -309,14 +309,16 @@ acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
/*
* If no memory preference is given, use upper 256MB slot most
* If no memory preference is given, use upper 2GB slot most
* bioses use for their memory window. Typically other bridges
* before us get in the way to assert their preferences on memory.
* Hardcoding like this sucks, so a more MD/MI way needs to be
* found to do it.
* found to do it. This is typically only used on older laptops
* that don't have pci busses behind pci bridge, so assuming < 2GB
* is liekly OK.
*/
if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
start = 0xf0000000;
start = 0x80000000;
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
count, flags));
}