arch/x86/mach-generic/es7000.c

   1 /*
   2  * APIC driver for the Unisys ES7000 chipset.
   3  */
   4 #define APIC_DEFINITION 1
   5 #include <linux/threads.h>
   6 #include <linux/cpumask.h>
   7 #include <asm/mpspec.h>
   8 #include <asm/genapic.h>
   9 #include <asm/fixmap.h>
  10 #include <asm/apicdef.h>
  11 #include <linux/kernel.h>
  12 #include <linux/string.h>
  13 #include <linux/init.h>
  14 #include <asm/es7000/apicdef.h>
  15 #include <linux/smp.h>
  16 #include <asm/es7000/apic.h>
  17 #include <asm/es7000/ipi.h>
  18 #include <asm/es7000/mpparse.h>
  19 #include <asm/mach-default/mach_wakecpu.h>
  20
  21 void __init es7000_update_genapic_to_cluster(void)
  22 {
  23         genapic->target_cpus = target_cpus_cluster;
  24         genapic->int_delivery_mode = INT_DELIVERY_MODE_CLUSTER;
  25         genapic->int_dest_mode = INT_DEST_MODE_CLUSTER;
  26         genapic->no_balance_irq = NO_BALANCE_IRQ_CLUSTER;
  27
  28         genapic->init_apic_ldr = init_apic_ldr_cluster;
  29
  30         genapic->cpu_mask_to_apicid = cpu_mask_to_apicid_cluster;
  31 }
  32
  33 static int probe_es7000(void)
  34 {
  35         /* probed later in mptable/ACPI hooks */
  36         return 0;
  37 }
  38
  39 extern void es7000_sw_apic(void);
  40 static void __init enable_apic_mode(void)
  41 {
  42         es7000_sw_apic();
  43         return;
  44 }
  45
  46 static __init int
  47 mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
  48 {
  49         if (mpc->oemptr) {
  50                 struct mpc_oemtable *oem_table =
  51                         (struct mpc_oemtable *)mpc->oemptr;
  52                 if (!strncmp(oem, "UNISYS", 6))
  53                         return parse_unisys_oem((char *)oem_table);
  54         }
  55         return 0;
  56 }
  57
  58 #ifdef CONFIG_ACPI
  59 /* Hook from generic ACPI tables.c */
  60 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  61 {
  62         unsigned long oem_addr = 0;
  63         int check_dsdt;
  64         int ret = 0;
  65
  66         /* check dsdt at first to avoid clear fix_map for oem_addr */
  67         check_dsdt = es7000_check_dsdt();
  68
  69         if (!find_unisys_acpi_oem_table(&oem_addr)) {
  70                 if (check_dsdt)
  71                         ret = parse_unisys_oem((char *)oem_addr);
  72                 else {
  73                         setup_unisys();
  74                         ret = 1;
  75                 }
  76                 /*
  77                  * we need to unmap it
  78                  */
  79                 unmap_unisys_acpi_oem_table(oem_addr);
  80         }
  81         return ret;
  82 }
  83 #else
  84 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  85 {
  86         return 0;
  87 }
  88 #endif
  89
  90 static void vector_allocation_domain(int cpu, cpumask_t *retmask)
  91 {
  92         /* Careful. Some cpus do not strictly honor the set of cpus
  93          * specified in the interrupt destination when using lowest
  94          * priority interrupt delivery mode.
  95          *
  96          * In particular there was a hyperthreading cpu observed to
  97          * deliver interrupts to the wrong hyperthread when only one
  98          * hyperthread was specified in the interrupt desitination.
  99          */
 100         *retmask = (cpumask_t){ { [0] = APIC_ALL_CPUS, } };
 101 }
 102
 103 struct genapic __initdata_refok apic_es7000 = APIC_INIT("es7000", probe_es7000);