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 unsigned int boot_cpu_logical_apicid = -1U;
  27
  28 /* Bitmask of physically existing CPUs */
  29 physid_mask_t phys_cpu_present_map;
  30
  31 unsigned int __initdata maxcpus = NR_CPUS;
  32
  33 /*
  34  * The Visual Workstation is Intel MP compliant in the hardware
  35  * sense, but it doesn't have a BIOS(-configuration table).
  36  * No problem for Linux.
  37  */
  38
  39 static void __init MP_processor_info (struct mpc_config_processor *m)
  40 {
  41         int ver, logical_apicid;
  42         physid_mask_t apic_cpus;
  43
  44         if (!(m->mpc_cpuflag & CPU_ENABLED))
  45                 return;
  46
  47         logical_apicid = m->mpc_apicid;
  48         printk(KERN_INFO "%sCPU #%d %ld:%ld APIC version %d\n",
  49                 m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
  50                 m->mpc_apicid,
  51                 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
  52                 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
  53                 m->mpc_apicver);
  54
  55         if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
  56                 boot_cpu_physical_apicid = m->mpc_apicid;
  57                 boot_cpu_logical_apicid = logical_apicid;
  58         }
  59
  60         ver = m->mpc_apicver;
  61         if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
  62                 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
  63                         m->mpc_apicid, MAX_APICS);
  64                 return;
  65         }
  66
  67         apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
  68         physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
  69         /*
  70          * Validate version
  71          */
  72         if (ver == 0x0) {
  73                 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
  74                         "fixing up to 0x10. (tell your hw vendor)\n",
  75                         m->mpc_apicid);
  76                 ver = 0x10;
  77         }
  78         apic_version[m->mpc_apicid] = ver;
  79 }
  80
  81 void __init find_smp_config(void)
  82 {
  83         struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
  84         unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
  85
  86         if (ncpus > CO_CPU_MAX) {
  87                 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
  88                         ncpus, mp);
  89
  90                 ncpus = CO_CPU_MAX;
  91         }
  92
  93         if (ncpus > maxcpus)
  94                 ncpus = maxcpus;
  95
  96         smp_found_config = 1;
  97         while (ncpus--)
  98                 MP_processor_info(mp++);
  99
 100         mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
 101 }
 102
 103 void __init get_smp_config (void)
 104 {
 105 }