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 extern unsigned int __cpuinitdata maxcpus;
  12
  13 /*
  14  * The Visual Workstation is Intel MP compliant in the hardware
  15  * sense, but it doesn't have a BIOS(-configuration table).
  16  * No problem for Linux.
  17  */
  18
  19 static void __init MP_processor_info (struct mpc_config_processor *m)
  20 {
  21         int ver, logical_apicid;
  22         physid_mask_t apic_cpus;
  23
  24         if (!(m->mpc_cpuflag & CPU_ENABLED))
  25                 return;
  26
  27         logical_apicid = m->mpc_apicid;
  28         printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
  29                m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
  30                m->mpc_apicid,
  31                (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
  32                (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
  33                m->mpc_apicver);
  34
  35         if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
  36                 boot_cpu_physical_apicid = m->mpc_apicid;
  37
  38         ver = m->mpc_apicver;
  39         if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
  40                 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
  41                         m->mpc_apicid, MAX_APICS);
  42                 return;
  43         }
  44
  45         apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
  46         physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
  47         /*
  48          * Validate version
  49          */
  50         if (ver == 0x0) {
  51                 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
  52                         "fixing up to 0x10. (tell your hw vendor)\n",
  53                         m->mpc_apicid);
  54                 ver = 0x10;
  55         }
  56         apic_version[m->mpc_apicid] = ver;
  57 }
  58
  59 void __init find_smp_config(void)
  60 {
  61         struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
  62         unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
  63
  64         if (ncpus > CO_CPU_MAX) {
  65                 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
  66                         ncpus, mp);
  67
  68                 ncpus = CO_CPU_MAX;
  69         }
  70
  71         if (ncpus > maxcpus)
  72                 ncpus = maxcpus;
  73
  74 #ifdef CONFIG_X86_LOCAL_APIC
  75         smp_found_config = 1;
  76 #endif
  77         while (ncpus--)
  78                 MP_processor_info(mp++);
  79
  80         mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
  81 }
  82
  83 void __init get_smp_config (void)
  84 {
  85 }