arch/i386/mach-visws/mpparse.c

   1
   2 #include <linux/config.h>
   3 #include <linux/init.h>
   4 #include <linux/smp.h>
   5
   6 #include <asm/smp.h>
   7 #include <asm/io.h>
   8
   9 #include "cobalt.h"
  10 #include "mach_apic.h"
  11
  12 /* Have we found an MP table */
  13 int smp_found_config;
  14
  15 /*
  16  * Various Linux-internal data structures created from the
  17  * MP-table.
  18  */
  19 int apic_version [MAX_APICS];
  20
  21 int pic_mode;
  22 unsigned long mp_lapic_addr;
  23
  24 /* Processor that is doing the boot up */
  25 unsigned int boot_cpu_physical_apicid = -1U;
  26
  27 /* Bitmask of physically existing CPUs */
  28 physid_mask_t phys_cpu_present_map;
  29
  30 unsigned int __initdata maxcpus = NR_CPUS;
  31
  32 /*
  33  * The Visual Workstation is Intel MP compliant in the hardware
  34  * sense, but it doesn't have a BIOS(-configuration table).
  35  * No problem for Linux.
  36  */
  37
  38 static void __init MP_processor_info (struct mpc_config_processor *m)
  39 {
  40         int ver, logical_apicid;
  41         physid_mask_t apic_cpus;
  42
  43         if (!(m->mpc_cpuflag & CPU_ENABLED))
  44                 return;
  45
  46         logical_apicid = m->mpc_apicid;
  47         printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n",
  48                 m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
  49                 m->mpc_apicid,
  50                 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
  51                 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
  52                 m->mpc_apicver);
  53
  54         if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
  55                 boot_cpu_physical_apicid = m->mpc_apicid;
  56
  57         ver = m->mpc_apicver;
  58         if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
  59                 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
  60                         m->mpc_apicid, MAX_APICS);
  61                 return;
  62         }
  63
  64         apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
  65         physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
  66         /*
  67          * Validate version
  68          */
  69         if (ver == 0x0) {
  70                 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
  71                         "fixing up to 0x10. (tell your hw vendor)\n",
  72                         m->mpc_apicid);
  73                 ver = 0x10;
  74         }
  75         apic_version[m->mpc_apicid] = ver;
  76 }
  77
  78 void __init find_smp_config(void)
  79 {
  80         struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
  81         unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
  82
  83         if (ncpus > CO_CPU_MAX) {
  84                 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
  85                         ncpus, mp);
  86
  87                 ncpus = CO_CPU_MAX;
  88         }
  89
  90         if (ncpus > maxcpus)
  91                 ncpus = maxcpus;
  92
  93         smp_found_config = 1;
  94         while (ncpus--)
  95                 MP_processor_info(mp++);
  96
  97         mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
  98 }
  99
 100 void __init get_smp_config (void)
 101 {
 102 }