arch/x86/kernel/bigsmp_32.c

   1 /*
   2  * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
   3  *
   4  * Drives the local APIC in "clustered mode".
   5  */
   6 #include <linux/threads.h>
   7 #include <linux/cpumask.h>
   8 #include <linux/kernel.h>
   9 #include <linux/init.h>
  10 #include <linux/dmi.h>
  11 #include <linux/smp.h>
  12
  13 #include <asm/apicdef.h>
  14 #include <asm/fixmap.h>
  15 #include <asm/mpspec.h>
  16 #include <asm/apic.h>
  17 #include <asm/ipi.h>
  18
  19 static inline unsigned bigsmp_get_apic_id(unsigned long x)
  20 {
  21         return (x >> 24) & 0xFF;
  22 }
  23
  24 static inline int bigsmp_apic_id_registered(void)
  25 {
  26         return 1;
  27 }
  28
  29 static inline const cpumask_t *bigsmp_target_cpus(void)
  30 {
  31 #ifdef CONFIG_SMP
  32         return &cpu_online_map;
  33 #else
  34         return &cpumask_of_cpu(0);
  35 #endif
  36 }
  37
  38 static inline unsigned long
  39 bigsmp_check_apicid_used(physid_mask_t bitmap, int apicid)
  40 {
  41         return 0;
  42 }
  43
  44 static inline unsigned long bigsmp_check_apicid_present(int bit)
  45 {
  46         return 1;
  47 }
  48
  49 static inline unsigned long calculate_ldr(int cpu)
  50 {
  51         unsigned long val, id;
  52
  53         val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
  54         id = per_cpu(x86_bios_cpu_apicid, cpu);
  55         val |= SET_APIC_LOGICAL_ID(id);
  56
  57         return val;
  58 }
  59
  60 /*
  61  * Set up the logical destination ID.
  62  *
  63  * Intel recommends to set DFR, LDR and TPR before enabling
  64  * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
  65  * document number 292116).  So here it goes...
  66  */
  67 static inline void bigsmp_init_apic_ldr(void)
  68 {
  69         unsigned long val;
  70         int cpu = smp_processor_id();
  71
  72         apic_write(APIC_DFR, APIC_DFR_FLAT);
  73         val = calculate_ldr(cpu);
  74         apic_write(APIC_LDR, val);
  75 }
  76
  77 static inline void bigsmp_setup_apic_routing(void)
  78 {
  79         printk(KERN_INFO
  80                 "Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
  81                 nr_ioapics);
  82 }
  83
  84 static inline int bigsmp_apicid_to_node(int logical_apicid)
  85 {
  86         return apicid_2_node[hard_smp_processor_id()];
  87 }
  88
  89 static inline int bigsmp_cpu_present_to_apicid(int mps_cpu)
  90 {
  91         if (mps_cpu < nr_cpu_ids)
  92                 return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
  93
  94         return BAD_APICID;
  95 }
  96
  97 static inline physid_mask_t bigsmp_apicid_to_cpu_present(int phys_apicid)
  98 {
  99         return physid_mask_of_physid(phys_apicid);
 100 }
 101
 102 /* Mapping from cpu number to logical apicid */
 103 static inline int bigsmp_cpu_to_logical_apicid(int cpu)
 104 {
 105         if (cpu >= nr_cpu_ids)
 106                 return BAD_APICID;
 107         return cpu_physical_id(cpu);
 108 }
 109
 110 static inline physid_mask_t bigsmp_ioapic_phys_id_map(physid_mask_t phys_map)
 111 {
 112         /* For clustered we don't have a good way to do this yet - hack */
 113         return physids_promote(0xFFL);
 114 }
 115
 116 static inline void bigsmp_setup_portio_remap(void)
 117 {
 118 }
 119
 120 static inline int bigsmp_check_phys_apicid_present(int boot_cpu_physical_apicid)
 121 {
 122         return 1;
 123 }
 124
 125 /* As we are using single CPU as destination, pick only one CPU here */
 126 static inline unsigned int bigsmp_cpu_mask_to_apicid(const cpumask_t *cpumask)
 127 {
 128         return bigsmp_cpu_to_logical_apicid(first_cpu(*cpumask));
 129 }
 130
 131 static inline unsigned int
 132 bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 133                               const struct cpumask *andmask)
 134 {
 135         int cpu;
 136
 137         /*
 138          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 139          * May as well be the first.
 140          */
 141         for_each_cpu_and(cpu, cpumask, andmask) {
 142                 if (cpumask_test_cpu(cpu, cpu_online_mask))
 143                         break;
 144         }
 145         if (cpu < nr_cpu_ids)
 146                 return bigsmp_cpu_to_logical_apicid(cpu);
 147
 148         return BAD_APICID;
 149 }
 150
 151 static inline int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
 152 {
 153         return cpuid_apic >> index_msb;
 154 }
 155
 156 static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
 157 {
 158         default_send_IPI_mask_sequence_phys(mask, vector);
 159 }
 160
 161 static inline void bigsmp_send_IPI_allbutself(int vector)
 162 {
 163         default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
 164 }
 165
 166 static inline void bigsmp_send_IPI_all(int vector)
 167 {
 168         bigsmp_send_IPI_mask(cpu_online_mask, vector);
 169 }
 170
 171 static int dmi_bigsmp; /* can be set by dmi scanners */
 172
 173 static int hp_ht_bigsmp(const struct dmi_system_id *d)
 174 {
 175         printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
 176         dmi_bigsmp = 1;
 177
 178         return 0;
 179 }
 180
 181
 182 static const struct dmi_system_id bigsmp_dmi_table[] = {
 183         { hp_ht_bigsmp, "HP ProLiant DL760 G2",
 184                 {       DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 185                         DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
 186                 }
 187         },
 188
 189         { hp_ht_bigsmp, "HP ProLiant DL740",
 190                 {       DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 191                         DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
 192                 }
 193         },
 194         { } /* NULL entry stops DMI scanning */
 195 };
 196
 197 static void bigsmp_vector_allocation_domain(int cpu, cpumask_t *retmask)
 198 {
 199         cpus_clear(*retmask);
 200         cpu_set(cpu, *retmask);
 201 }
 202
 203 static int probe_bigsmp(void)
 204 {
 205         if (def_to_bigsmp)
 206                 dmi_bigsmp = 1;
 207         else
 208                 dmi_check_system(bigsmp_dmi_table);
 209
 210         return dmi_bigsmp;
 211 }
 212
 213 struct apic apic_bigsmp = {
 214
 215         .name                           = "bigsmp",
 216         .probe                          = probe_bigsmp,
 217         .acpi_madt_oem_check            = NULL,
 218         .apic_id_registered             = bigsmp_apic_id_registered,
 219
 220         .irq_delivery_mode              = dest_Fixed,
 221         /* phys delivery to target CPU: */
 222         .irq_dest_mode                  = 0,
 223
 224         .target_cpus                    = bigsmp_target_cpus,
 225         .disable_esr                    = 1,
 226         .dest_logical                   = 0,
 227         .check_apicid_used              = bigsmp_check_apicid_used,
 228         .check_apicid_present           = bigsmp_check_apicid_present,
 229
 230         .vector_allocation_domain       = bigsmp_vector_allocation_domain,
 231         .init_apic_ldr                  = bigsmp_init_apic_ldr,
 232
 233         .ioapic_phys_id_map             = bigsmp_ioapic_phys_id_map,
 234         .setup_apic_routing             = bigsmp_setup_apic_routing,
 235         .multi_timer_check              = NULL,
 236         .apicid_to_node                 = bigsmp_apicid_to_node,
 237         .cpu_to_logical_apicid          = bigsmp_cpu_to_logical_apicid,
 238         .cpu_present_to_apicid          = bigsmp_cpu_present_to_apicid,
 239         .apicid_to_cpu_present          = bigsmp_apicid_to_cpu_present,
 240         .setup_portio_remap             = NULL,
 241         .check_phys_apicid_present      = bigsmp_check_phys_apicid_present,
 242         .enable_apic_mode               = NULL,
 243         .phys_pkg_id                    = bigsmp_phys_pkg_id,
 244         .mps_oem_check                  = NULL,
 245
 246         .get_apic_id                    = bigsmp_get_apic_id,
 247         .set_apic_id                    = NULL,
 248         .apic_id_mask                   = 0xFF << 24,
 249
 250         .cpu_mask_to_apicid             = bigsmp_cpu_mask_to_apicid,
 251         .cpu_mask_to_apicid_and         = bigsmp_cpu_mask_to_apicid_and,
 252
 253         .send_IPI_mask                  = bigsmp_send_IPI_mask,
 254         .send_IPI_mask_allbutself       = NULL,
 255         .send_IPI_allbutself            = bigsmp_send_IPI_allbutself,
 256         .send_IPI_all                   = bigsmp_send_IPI_all,
 257         .send_IPI_self                  = default_send_IPI_self,
 258
 259         .wakeup_cpu                     = NULL,
 260         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 261         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 262
 263         .wait_for_init_deassert         = default_wait_for_init_deassert,
 264
 265         .smp_callin_clear_local_apic    = NULL,
 266         .inquire_remote_apic            = default_inquire_remote_apic,
 267
 268         .read                           = native_apic_mem_read,
 269         .write                          = native_apic_mem_write,
 270         .icr_read                       = native_apic_icr_read,
 271         .icr_write                      = native_apic_icr_write,
 272         .wait_icr_idle                  = native_apic_wait_icr_idle,
 273         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
 274 };