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/es7000/wakecpu.h>
  20
  21 static int probe_es7000(void)
  22 {
  23         /* probed later in mptable/ACPI hooks */
  24         return 0;
  25 }
  26
  27 extern void es7000_sw_apic(void);
  28 static void __init enable_apic_mode(void)
  29 {
  30         es7000_sw_apic();
  31         return;
  32 }
  33
  34 static __init int mps_oem_check(struct mp_config_table *mpc, char *oem,
  35                 char *productid)
  36 {
  37         if (mpc->mpc_oemptr) {
  38                 struct mp_config_oemtable *oem_table =
  39                         (struct mp_config_oemtable *)mpc->mpc_oemptr;
  40                 if (!strncmp(oem, "UNISYS", 6))
  41                         return parse_unisys_oem((char *)oem_table);
  42         }
  43         return 0;
  44 }
  45
  46 #ifdef CONFIG_ACPI
  47 /* Hook from generic ACPI tables.c */
  48 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  49 {
  50         unsigned long oem_addr = 0;
  51         int check_dsdt;
  52         int ret = 0;
  53
  54         /* check dsdt at first to avoid clear fix_map for oem_addr */
  55         check_dsdt = es7000_check_dsdt();
  56
  57         if (!find_unisys_acpi_oem_table(&oem_addr)) {
  58                 if (check_dsdt)
  59                         ret = parse_unisys_oem((char *)oem_addr);
  60                 else {
  61                         setup_unisys();
  62                         ret = 1;
  63                 }
  64                 /*
  65                  * we need to unmap it
  66                  */
  67                 unmap_unisys_acpi_oem_table(oem_addr);
  68         }
  69         return ret;
  70 }
  71 #else
  72 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  73 {
  74         return 0;
  75 }
  76 #endif
  77
  78 static cpumask_t vector_allocation_domain(int cpu)
  79 {
  80         /* Careful. Some cpus do not strictly honor the set of cpus
  81          * specified in the interrupt destination when using lowest
  82          * priority interrupt delivery mode.
  83          *
  84          * In particular there was a hyperthreading cpu observed to
  85          * deliver interrupts to the wrong hyperthread when only one
  86          * hyperthread was specified in the interrupt desitination.
  87          */
  88         cpumask_t domain = { { [0] = APIC_ALL_CPUS, } };
  89         return domain;
  90 }
  91
  92 struct genapic __initdata_refok apic_es7000 = APIC_INIT("es7000", probe_es7000);