arch/x86/mach-visws/mpparse.c

   1
   2 #include <linux/init.h>
   3 #include <linux/smp.h>
   4
   5 #include <asm/smp.h>
   6 #include <asm/io.h>
   7
   8 #include "cobalt.h"
   9 #include "mach_apic.h"
  10
  11 /* Have we found an MP table */
  12 int smp_found_config;
  13
  14 extern unsigned int __cpuinitdata maxcpus;
  15
  16 /*
  17  * The Visual Workstation is Intel MP compliant in the hardware
  18  * sense, but it doesn't have a BIOS(-configuration table).
  19  * No problem for Linux.
  20  */
  21
  22 static void __init MP_processor_info (struct mpc_config_processor *m)
  23 {
  24         int ver, logical_apicid;
  25         physid_mask_t apic_cpus;
  26
  27         if (!(m->mpc_cpuflag & CPU_ENABLED))
  28                 return;
  29
  30         logical_apicid = m->mpc_apicid;
  31         printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
  32                m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
  33                m->mpc_apicid,
  34                (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
  35                (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
  36                m->mpc_apicver);
  37
  38         if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
  39                 boot_cpu_physical_apicid = m->mpc_apicid;
  40
  41         ver = m->mpc_apicver;
  42         if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
  43                 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
  44                         m->mpc_apicid, MAX_APICS);
  45                 return;
  46         }
  47
  48         apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
  49         physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
  50         /*
  51          * Validate version
  52          */
  53         if (ver == 0x0) {
  54                 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
  55                         "fixing up to 0x10. (tell your hw vendor)\n",
  56                         m->mpc_apicid);
  57                 ver = 0x10;
  58         }
  59         apic_version[m->mpc_apicid] = ver;
  60 }
  61
  62 void __init find_smp_config(void)
  63 {
  64         struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
  65         unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
  66
  67         if (ncpus > CO_CPU_MAX) {
  68                 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
  69                         ncpus, mp);
  70
  71                 ncpus = CO_CPU_MAX;
  72         }
  73
  74         if (ncpus > maxcpus)
  75                 ncpus = maxcpus;
  76
  77         smp_found_config = 1;
  78         while (ncpus--)
  79                 MP_processor_info(mp++);
  80
  81         mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
  82 }
  83
  84 void __init get_smp_config (void)
  85 {
  86 }