arch/x86/kernel/smpboot_32.c

   1 /*
   2  *      x86 SMP booting functions
   3  *
   4  *      (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
   5  *      (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
   6  *
   7  *      Much of the core SMP work is based on previous work by Thomas Radke, to
   8  *      whom a great many thanks are extended.
   9  *
  10  *      Thanks to Intel for making available several different Pentium,
  11  *      Pentium Pro and Pentium-II/Xeon MP machines.
  12  *      Original development of Linux SMP code supported by Caldera.
  13  *
  14  *      This code is released under the GNU General Public License version 2 or
  15  *      later.
  16  *
  17  *      Fixes
  18  *              Felix Koop      :       NR_CPUS used properly
  19  *              Jose Renau      :       Handle single CPU case.
  20  *              Alan Cox        :       By repeated request 8) - Total BogoMIPS report.
  21  *              Greg Wright     :       Fix for kernel stacks panic.
  22  *              Erich Boleyn    :       MP v1.4 and additional changes.
  23  *      Matthias Sattler        :       Changes for 2.1 kernel map.
  24  *      Michel Lespinasse       :       Changes for 2.1 kernel map.
  25  *      Michael Chastain        :       Change trampoline.S to gnu as.
  26  *              Alan Cox        :       Dumb bug: 'B' step PPro's are fine
  27  *              Ingo Molnar     :       Added APIC timers, based on code
  28  *                                      from Jose Renau
  29  *              Ingo Molnar     :       various cleanups and rewrites
  30  *              Tigran Aivazian :       fixed "0.00 in /proc/uptime on SMP" bug.
  31  *      Maciej W. Rozycki       :       Bits for genuine 82489DX APICs
  32  *              Martin J. Bligh :       Added support for multi-quad systems
  33  *              Dave Jones      :       Report invalid combinations of Athlon CPUs.
  34 *               Rusty Russell   :       Hacked into shape for new "hotplug" boot process. */
  35
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/kernel.h>
  39
  40 #include <linux/mm.h>
  41 #include <linux/sched.h>
  42 #include <linux/kernel_stat.h>
  43 #include <linux/bootmem.h>
  44 #include <linux/notifier.h>
  45 #include <linux/cpu.h>
  46 #include <linux/percpu.h>
  47 #include <linux/nmi.h>
  48
  49 #include <linux/delay.h>
  50 #include <linux/mc146818rtc.h>
  51 #include <asm/tlbflush.h>
  52 #include <asm/desc.h>
  53 #include <asm/arch_hooks.h>
  54 #include <asm/nmi.h>
  55
  56 #include <mach_apic.h>
  57 #include <mach_wakecpu.h>
  58 #include <smpboot_hooks.h>
  59 #include <asm/vmi.h>
  60 #include <asm/mtrr.h>
  61
  62 u8 apicid_2_node[MAX_APICID];
  63
  64 /* Where the IO area was mapped on multiquad, always 0 otherwise */
  65 void *xquad_portio;
  66 #ifdef CONFIG_X86_NUMAQ
  67 EXPORT_SYMBOL(xquad_portio);
  68 #endif