[LinuxBIOS] x86_64: calibrate_delay_direct and apic id lift for BSP
andi, I tried to lift apic id in LinuxBIOS for all cpus after 0x10. When using MB with AMD8111, the jiffies was not moving. So it is locked at calibrate_delay_direct... but MB with Nvidia ck804, jiffies is moving. If I don't change BSP apic id ( keep it to 0), It changes.... I have no idea how the jiffies changes, there is another thread change it....? YH Memory: 508000k/524288k available (3146k kernel code, 15900k reserved, 1160k data, 296k init) calibrate_delay_direct i=0 calibrate_delay_direct start_jiffies=fffedb08 calibrate_delay_direct 1 jiffies=fffedb08 calibrate_delay_direct 1 jiffies=fffedb08 calibrate_delay_direct 1 jiffies=fffedb08 calibrate_delay_direct 1 jiffies=fffedb08
On Friday 28 October 2005 20:42, Yinghai Lu wrote:
andi,
I tried to lift apic id in LinuxBIOS for all cpus after 0x10.
When using MB with AMD8111, the jiffies was not moving. So it is locked at calibrate_delay_direct...
Have you tried it with 2.6.14? It has some new code to handle high apic ids better
but MB with Nvidia ck804, jiffies is moving.
The timer is wired different on nvidia than on 8111. They can go either through the 8259 or through the IOAPIC. There is still some code that falls back to the 8259 if IOAPIC doesn't work, which may make it appear working on Nvidia. As a warning I'm about to remove that code so don't rely on it.
If I don't change BSP apic id ( keep it to 0), It changes....
I have no idea how the jiffies changes, there is another thread change it....?
They change when interrupt 0 fires. So it's probably misrouted or similar. -Andi
On 10/28/05, Andi Kleen <ak@suse.de> wrote:
They change when interrupt 0 fires. So it's probably misrouted or similar.
the problem fixed, on the AMD 8111 based MB, if lift the bsp apic id, the LinuxBIOS need to set the dest processor apic id in the 8111 io apic reg setup for IRQ0. Thanks. YH
participants (3)
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Andi Kleen -
yhlu -
Yinghai Lu