arch/x86/kernel/apic/apic_numachip.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Numascale NumaConnect-Specific APIC Code
   7  *
   8  * Copyright (C) 2011 Numascale AS. All rights reserved.
   9  *
  10  * Send feedback to <support@numascale.com>
  11  *
  12  */
  13
  14 #include <linux/errno.h>
  15 #include <linux/threads.h>
  16 #include <linux/cpumask.h>
  17 #include <linux/string.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/ctype.h>
  21 #include <linux/init.h>
  22 #include <linux/hardirq.h>
  23 #include <linux/delay.h>
  24
  25 #include <asm/numachip/numachip.h>
  26 #include <asm/numachip/numachip_csr.h>
  27 #include <asm/smp.h>
  28 #include <asm/apic.h>
  29 #include <asm/ipi.h>
  30 #include <asm/apic_flat_64.h>
  31
  32 static int numachip_system __read_mostly;
  33
  34 static const struct apic apic_numachip __read_mostly;
  35
  36 static unsigned int get_apic_id(unsigned long x)
  37 {
  38         unsigned long value;
  39         unsigned int id;
  40
  41         rdmsrl(MSR_FAM10H_NODE_ID, value);
  42         id = ((x >> 24) & 0xffU) | ((value << 2) & 0x3f00U);
  43
  44         return id;
  45 }
  46
  47 static unsigned long set_apic_id(unsigned int id)
  48 {
  49         unsigned long x;
  50
  51         x = ((id & 0xffU) << 24);
  52         return x;
  53 }
  54
  55 static unsigned int read_xapic_id(void)
  56 {
  57         return get_apic_id(apic_read(APIC_ID));
  58 }
  59
  60 static int numachip_apic_id_valid(int apicid)
  61 {
  62         /* Trust what bootloader passes in MADT */
  63         return 1;
  64 }
  65
  66 static int numachip_apic_id_registered(void)
  67 {
  68         return physid_isset(read_xapic_id(), phys_cpu_present_map);
  69 }
  70
  71 static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
  72 {
  73         return initial_apic_id >> index_msb;
  74 }
  75
  76 static int __cpuinit numachip_wakeup_secondary(int phys_apicid, unsigned long start_rip)
  77 {
  78         union numachip_csr_g3_ext_irq_gen int_gen;
  79
  80         int_gen.s._destination_apic_id = phys_apicid;
  81         int_gen.s._vector = 0;
  82         int_gen.s._msgtype = APIC_DM_INIT >> 8;
  83         int_gen.s._index = 0;
  84
  85         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
  86
  87         int_gen.s._msgtype = APIC_DM_STARTUP >> 8;
  88         int_gen.s._vector = start_rip >> 12;
  89
  90         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
  91
  92         atomic_set(&init_deasserted, 1);
  93         return 0;
  94 }
  95
  96 static void numachip_send_IPI_one(int cpu, int vector)
  97 {
  98         union numachip_csr_g3_ext_irq_gen int_gen;
  99         int apicid = per_cpu(x86_cpu_to_apicid, cpu);
 100
 101         int_gen.s._destination_apic_id = apicid;
 102         int_gen.s._vector = vector;
 103         int_gen.s._msgtype = (vector == NMI_VECTOR ? APIC_DM_NMI : APIC_DM_FIXED) >> 8;
 104         int_gen.s._index = 0;
 105
 106         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
 107 }
 108
 109 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
 110 {
 111         unsigned int cpu;
 112
 113         for_each_cpu(cpu, mask)
 114                 numachip_send_IPI_one(cpu, vector);
 115 }
 116
 117 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
 118                                                 int vector)
 119 {
 120         unsigned int this_cpu = smp_processor_id();
 121         unsigned int cpu;
 122
 123         for_each_cpu(cpu, mask) {
 124                 if (cpu != this_cpu)
 125                         numachip_send_IPI_one(cpu, vector);
 126         }
 127 }
 128
 129 static void numachip_send_IPI_allbutself(int vector)
 130 {
 131         unsigned int this_cpu = smp_processor_id();
 132         unsigned int cpu;
 133
 134         for_each_online_cpu(cpu) {
 135                 if (cpu != this_cpu)
 136                         numachip_send_IPI_one(cpu, vector);
 137         }
 138 }
 139
 140 static void numachip_send_IPI_all(int vector)
 141 {
 142         numachip_send_IPI_mask(cpu_online_mask, vector);
 143 }
 144
 145 static void numachip_send_IPI_self(int vector)
 146 {
 147         __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
 148 }
 149
 150 static int __init numachip_probe(void)
 151 {
 152         return apic == &apic_numachip;
 153 }
 154
 155 static void __init map_csrs(void)
 156 {
 157         printk(KERN_INFO "NumaChip: Mapping local CSR space (%016llx - %016llx)\n",
 158                 NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_BASE + NUMACHIP_LCSR_SIZE - 1);
 159         init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
 160
 161         printk(KERN_INFO "NumaChip: Mapping global CSR space (%016llx - %016llx)\n",
 162                 NUMACHIP_GCSR_BASE, NUMACHIP_GCSR_BASE + NUMACHIP_GCSR_SIZE - 1);
 163         init_extra_mapping_uc(NUMACHIP_GCSR_BASE, NUMACHIP_GCSR_SIZE);
 164 }
 165
 166 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
 167 {
 168
 169         if (c->phys_proc_id != node) {
 170                 c->phys_proc_id = node;
 171                 per_cpu(cpu_llc_id, smp_processor_id()) = node;
 172         }
 173 }
 174
 175 static int __init numachip_system_init(void)
 176 {
 177         unsigned int val;
 178
 179         if (!numachip_system)
 180                 return 0;
 181
 182         x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
 183         x86_init.pci.arch_init = pci_numachip_init;
 184
 185         map_csrs();
 186
 187         val = read_lcsr(CSR_G0_NODE_IDS);
 188         printk(KERN_INFO "NumaChip: Local NodeID = %08x\n", val);
 189
 190         return 0;
 191 }
 192 early_initcall(numachip_system_init);
 193
 194 static int numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 195 {
 196         if (!strncmp(oem_id, "NUMASC", 6)) {
 197                 numachip_system = 1;
 198                 return 1;
 199         }
 200
 201         return 0;
 202 }
 203
 204 static const struct apic apic_numachip __refconst = {
 205
 206         .name                           = "NumaConnect system",
 207         .probe                          = numachip_probe,
 208         .acpi_madt_oem_check            = numachip_acpi_madt_oem_check,
 209         .apic_id_valid                  = numachip_apic_id_valid,
 210         .apic_id_registered             = numachip_apic_id_registered,
 211
 212         .irq_delivery_mode              = dest_Fixed,
 213         .irq_dest_mode                  = 0, /* physical */
 214
 215         .target_cpus                    = online_target_cpus,
 216         .disable_esr                    = 0,
 217         .dest_logical                   = 0,
 218         .check_apicid_used              = NULL,
 219         .check_apicid_present           = NULL,
 220
 221         .vector_allocation_domain       = default_vector_allocation_domain,
 222         .init_apic_ldr                  = flat_init_apic_ldr,
 223
 224         .ioapic_phys_id_map             = NULL,
 225         .setup_apic_routing             = NULL,
 226         .multi_timer_check              = NULL,
 227         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 228         .apicid_to_cpu_present          = NULL,
 229         .setup_portio_remap             = NULL,
 230         .check_phys_apicid_present      = default_check_phys_apicid_present,
 231         .enable_apic_mode               = NULL,
 232         .phys_pkg_id                    = numachip_phys_pkg_id,
 233         .mps_oem_check                  = NULL,
 234
 235         .get_apic_id                    = get_apic_id,
 236         .set_apic_id                    = set_apic_id,
 237         .apic_id_mask                   = 0xffU << 24,
 238
 239         .cpu_mask_to_apicid_and         = default_cpu_mask_to_apicid_and,
 240
 241         .send_IPI_mask                  = numachip_send_IPI_mask,
 242         .send_IPI_mask_allbutself       = numachip_send_IPI_mask_allbutself,
 243         .send_IPI_allbutself            = numachip_send_IPI_allbutself,
 244         .send_IPI_all                   = numachip_send_IPI_all,
 245         .send_IPI_self                  = numachip_send_IPI_self,
 246
 247         .wakeup_secondary_cpu           = numachip_wakeup_secondary,
 248         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 249         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 250         .wait_for_init_deassert         = NULL,
 251         .smp_callin_clear_local_apic    = NULL,
 252         .inquire_remote_apic            = NULL, /* REMRD not supported */
 253
 254         .read                           = native_apic_mem_read,
 255         .write                          = native_apic_mem_write,
 256         .eoi_write                      = native_apic_mem_write,
 257         .icr_read                       = native_apic_icr_read,
 258         .icr_write                      = native_apic_icr_write,
 259         .wait_icr_idle                  = native_apic_wait_icr_idle,
 260         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
 261 };
 262 apic_driver(apic_numachip);
 263