On Thursday 23 March 2006 19:22, Arjan van de Ven wrote:
> Hi,
>
> There have been several machines that don't have a working MMCONFIG,
> often because of a buggy MCFG table in the ACPI bios. This patch adds a
> simple sanity check that detects a whole bunch of these cases, and when
> it detects it, linux now boots rather than crash-and-burns.
Yes, MCFG is a pain recently. Looks like we did the grave mistake
of using something in the BIOS before Windows again.
> +
> +/*
> + * Check if an address is reserved in the e820 map
> + */
> +int is_e820_reserved(u64 address)
> +{
> + int i;
> + i = e820.nr_map;
> + while (--i >= 0) {
> + unsigned long long start = e820.map[i].addr;
> + unsigned long long end = start + e820.map[i].size;
> +
> + if (address <=end && address >= start) {
> + if (e820.map[i].type == E820_RESERVED)
> + return 1;
> + else
> + return 0;
> + }
> + }
> + return 0;
> +}
That is e820_mapped(address, address+size, E820_RESERVED)
And not having a size is definitely wrong on i386 too.
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
