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 #include <asm/pgtable.h>
  32
  33 static int numachip_system __read_mostly;
  34
  35 static const struct apic apic_numachip;
  36
  37 static unsigned int get_apic_id(unsigned long x)
  38 {
  39         unsigned long value;
  40         unsigned int id = (x >> 24) & 0xff;
  41
  42         if (static_cpu_has_safe(X86_FEATURE_NODEID_MSR)) {
  43                 rdmsrl(MSR_FAM10H_NODE_ID, value);
  44                 id |= (value << 2) & 0xff00;
  45         }
  46
  47         return id;
  48 }
  49
  50 static unsigned long set_apic_id(unsigned int id)
  51 {
  52         unsigned long x;
  53
  54         x = ((id & 0xffU) << 24);
  55         return x;
  56 }
  57
  58 static unsigned int read_xapic_id(void)
  59 {
  60         return get_apic_id(apic_read(APIC_ID));
  61 }
  62
  63 static int numachip_apic_id_valid(int apicid)
  64 {
  65         /* Trust what bootloader passes in MADT */
  66         return 1;
  67 }
  68
  69 static int numachip_apic_id_registered(void)
  70 {
  71         return physid_isset(read_xapic_id(), phys_cpu_present_map);
  72 }
  73
  74 static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
  75 {
  76         return initial_apic_id >> index_msb;
  77 }
  78
  79 static int numachip_wakeup_secondary(int phys_apicid, unsigned long start_rip)
  80 {
  81         union numachip_csr_g3_ext_irq_gen int_gen;
  82
  83         int_gen.s._destination_apic_id = phys_apicid;
  84         int_gen.s._vector = 0;
  85         int_gen.s._msgtype = APIC_DM_INIT >> 8;
  86         int_gen.s._index = 0;
  87
  88         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
  89
  90         int_gen.s._msgtype = APIC_DM_STARTUP >> 8;
  91         int_gen.s._vector = start_rip >> 12;
  92
  93         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
  94
  95         atomic_set(&init_deasserted, 1);
  96         return 0;
  97 }
  98
  99 static void numachip_send_IPI_one(int cpu, int vector)
 100 {
 101         union numachip_csr_g3_ext_irq_gen int_gen;
 102         int apicid = per_cpu(x86_cpu_to_apicid, cpu);
 103
 104         int_gen.s._destination_apic_id = apicid;
 105         int_gen.s._vector = vector;
 106         int_gen.s._msgtype = (vector == NMI_VECTOR ? APIC_DM_NMI : APIC_DM_FIXED) >> 8;
 107         int_gen.s._index = 0;
 108
 109         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
 110 }
 111
 112 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
 113 {
 114         unsigned int cpu;
 115
 116         for_each_cpu(cpu, mask)
 117                 numachip_send_IPI_one(cpu, vector);
 118 }
 119
 120 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
 121                                                 int vector)
 122 {
 123         unsigned int this_cpu = smp_processor_id();
 124         unsigned int cpu;
 125
 126         for_each_cpu(cpu, mask) {
 127                 if (cpu != this_cpu)
 128                         numachip_send_IPI_one(cpu, vector);
 129         }
 130 }
 131
 132 static void numachip_send_IPI_allbutself(int vector)
 133 {
 134         unsigned int this_cpu = smp_processor_id();
 135         unsigned int cpu;
 136
 137         for_each_online_cpu(cpu) {
 138                 if (cpu != this_cpu)
 139                         numachip_send_IPI_one(cpu, vector);
 140         }
 141 }
 142
 143 static void numachip_send_IPI_all(int vector)
 144 {
 145         numachip_send_IPI_mask(cpu_online_mask, vector);
 146 }
 147
 148 static void numachip_send_IPI_self(int vector)
 149 {
 150         apic_write(APIC_SELF_IPI, vector);
 151 }
 152
 153 static int __init numachip_probe(void)
 154 {
 155         return apic == &apic_numachip;
 156 }
 157
 158 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
 159 {
 160         u64 val;
 161         u32 nodes = 1;
 162
 163         this_cpu_write(cpu_llc_id, node);
 164
 165         /* Account for nodes per socket in multi-core-module processors */
 166         if (static_cpu_has_safe(X86_FEATURE_NODEID_MSR)) {
 167                 rdmsrl(MSR_FAM10H_NODE_ID, val);
 168                 nodes = ((val >> 3) & 7) + 1;
 169         }
 170
 171         c->phys_proc_id = node / nodes;
 172 }
 173
 174 static int __init numachip_system_init(void)
 175 {
 176         if (!numachip_system)
 177                 return 0;
 178
 179         init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
 180         init_extra_mapping_uc(NUMACHIP_GCSR_BASE, NUMACHIP_GCSR_SIZE);
 181
 182         x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
 183         x86_init.pci.arch_init = pci_numachip_init;
 184
 185         return 0;
 186 }
 187 early_initcall(numachip_system_init);
 188
 189 static int numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 190 {
 191         if (!strncmp(oem_id, "NUMASC", 6)) {
 192                 numachip_system = 1;
 193                 return 1;
 194         }
 195
 196         return 0;
 197 }
 198
 199 static const struct apic apic_numachip __refconst = {
 200
 201         .name                           = "NumaConnect system",
 202         .probe                          = numachip_probe,
 203         .acpi_madt_oem_check            = numachip_acpi_madt_oem_check,
 204         .apic_id_valid                  = numachip_apic_id_valid,
 205         .apic_id_registered             = numachip_apic_id_registered,
 206
 207         .irq_delivery_mode              = dest_Fixed,
 208         .irq_dest_mode                  = 0, /* physical */
 209
 210         .target_cpus                    = online_target_cpus,
 211         .disable_esr                    = 0,
 212         .dest_logical                   = 0,
 213         .check_apicid_used              = NULL,
 214
 215         .vector_allocation_domain       = default_vector_allocation_domain,
 216         .init_apic_ldr                  = flat_init_apic_ldr,
 217
 218         .ioapic_phys_id_map             = NULL,
 219         .setup_apic_routing             = NULL,
 220         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 221         .apicid_to_cpu_present          = NULL,
 222         .check_phys_apicid_present      = default_check_phys_apicid_present,
 223         .phys_pkg_id                    = numachip_phys_pkg_id,
 224
 225         .get_apic_id                    = get_apic_id,
 226         .set_apic_id                    = set_apic_id,
 227         .apic_id_mask                   = 0xffU << 24,
 228
 229         .cpu_mask_to_apicid_and         = default_cpu_mask_to_apicid_and,
 230
 231         .send_IPI_mask                  = numachip_send_IPI_mask,
 232         .send_IPI_mask_allbutself       = numachip_send_IPI_mask_allbutself,
 233         .send_IPI_allbutself            = numachip_send_IPI_allbutself,
 234         .send_IPI_all                   = numachip_send_IPI_all,
 235         .send_IPI_self                  = numachip_send_IPI_self,
 236
 237         .wakeup_secondary_cpu           = numachip_wakeup_secondary,
 238         .wait_for_init_deassert         = false,
 239         .inquire_remote_apic            = NULL, /* REMRD not supported */
 240
 241         .read                           = native_apic_mem_read,
 242         .write                          = native_apic_mem_write,
 243         .eoi_write                      = native_apic_mem_write,
 244         .icr_read                       = native_apic_icr_read,
 245         .icr_write                      = native_apic_icr_write,
 246         .wait_icr_idle                  = native_apic_wait_icr_idle,
 247         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
 248 };
 249 apic_driver(apic_numachip);
 250