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 int pic_mode;
  15
  16 extern unsigned int __cpuinitdata maxcpus;
  17
  18 /*
  19  * The Visual Workstation is Intel MP compliant in the hardware
  20  * sense, but it doesn't have a BIOS(-configuration table).
  21  * No problem for Linux.
  22  */
  23
  24 static void __init MP_processor_info (struct mpc_config_processor *m)
  25 {
  26         int ver, logical_apicid;
  27         physid_mask_t apic_cpus;
  28
  29         if (!(m->mpc_cpuflag & CPU_ENABLED))
  30                 return;
  31
  32         logical_apicid = m->mpc_apicid;
  33         printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
  34                m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
  35                m->mpc_apicid,
  36                (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
  37                (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
  38                m->mpc_apicver);
  39
  40         if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
  41                 boot_cpu_physical_apicid = m->mpc_apicid;
  42
  43         ver = m->mpc_apicver;
  44         if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
  45                 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
  46                         m->mpc_apicid, MAX_APICS);
  47                 return;
  48         }
  49
  50         apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
  51         physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
  52         /*
  53          * Validate version
  54          */
  55         if (ver == 0x0) {
  56                 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
  57                         "fixing up to 0x10. (tell your hw vendor)\n",
  58                         m->mpc_apicid);
  59                 ver = 0x10;
  60         }
  61         apic_version[m->mpc_apicid] = ver;
  62 }
  63
  64 void __init find_smp_config(void)
  65 {
  66         struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
  67         unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
  68
  69         if (ncpus > CO_CPU_MAX) {
  70                 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
  71                         ncpus, mp);
  72
  73                 ncpus = CO_CPU_MAX;
  74         }
  75
  76         if (ncpus > maxcpus)
  77                 ncpus = maxcpus;
  78
  79         smp_found_config = 1;
  80         while (ncpus--)
  81                 MP_processor_info(mp++);
  82
  83         mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
  84 }
  85
  86 void __init get_smp_config (void)
  87 {
  88 }