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