[lkml]   [2003]   [Jan]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: new CPUID bit
Ulrich> Northwood P4's have one more bit in the CPUID processor info
Ulrich> set: bit 31. Intel calls the feature PBE (Pending Break
Ulrich> Enable).

For the curious, from <>:

Adrian> Bit 31 is PBE (Pending Break Enable) which you can find in the
Adrian> latest P4 instruction manual (document 24547106, page
Adrian> 159-162). To quote:

24547106> Pending Break Enable. The processor supports the use of the
24547106> FERR#/PBE# pin when the processor is in the stop-clock state
24547106> (STPCLK# is asserted) to signal the processor that an
24547106> interrupt is pending and that the processor should return to
24547106> normal operation to handle the interrupt. Bit 10 (PBE
24547106> enable) in the IA32_MISC_ENABLE MSR enables this capability.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:32    [W:0.087 / U:5.856 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site