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 __read_mostly;
  36
  37 static unsigned int get_apic_id(unsigned long x)
  38 {
  39         unsigned long value;
  40         unsigned int id;
  41
  42         rdmsrl(MSR_FAM10H_NODE_ID, value);
  43         id = ((x >> 24) & 0xffU) | ((value << 2) & 0x3f00U);
  44
  45         return id;
  46 }
  47
  48 static unsigned long set_apic_id(unsigned int id)
  49 {
  50         unsigned long x;
  51
  52         x = ((id & 0xffU) << 24);
  53         return x;
  54 }
  55
  56 static unsigned int read_xapic_id(void)
  57 {
  58         return get_apic_id(apic_read(APIC_ID));
  59 }
  60
  61 static int numachip_apic_id_valid(int apicid)
  62 {
  63         /* Trust what bootloader passes in MADT */
  64         return 1;
  65 }
  66
  67 static int numachip_apic_id_registered(void)
  68 {
  69         return physid_isset(read_xapic_id(), phys_cpu_present_map);
  70 }
  71
  72 static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
  73 {
  74         return initial_apic_id >> index_msb;
  75 }
  76
  77 static int numachip_wakeup_secondary(int phys_apicid, unsigned long start_rip)
  78 {
  79         union numachip_csr_g3_ext_irq_gen int_gen;
  80
  81         int_gen.s._destination_apic_id = phys_apicid;
  82         int_gen.s._vector = 0;
  83         int_gen.s._msgtype = APIC_DM_INIT >> 8;
  84         int_gen.s._index = 0;
  85
  86         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
  87
  88         int_gen.s._msgtype = APIC_DM_STARTUP >> 8;
  89         int_gen.s._vector = start_rip >> 12;
  90
  91         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
  92
  93         atomic_set(&init_deasserted, 1);
  94         return 0;
  95 }
  96
  97 static void numachip_send_IPI_one(int cpu, int vector)
  98 {
  99         union numachip_csr_g3_ext_irq_gen int_gen;
 100         int apicid = per_cpu(x86_cpu_to_apicid, cpu);
 101
 102         int_gen.s._destination_apic_id = apicid;
 103         int_gen.s._vector = vector;
 104         int_gen.s._msgtype = (vector == NMI_VECTOR ? APIC_DM_NMI : APIC_DM_FIXED) >> 8;
 105         int_gen.s._index = 0;
 106
 107         write_lcsr(CSR_G3_EXT_IRQ_GEN, int_gen.v);
 108 }
 109
 110 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
 111 {
 112         unsigned int cpu;
 113
 114         for_each_cpu(cpu, mask)
 115                 numachip_send_IPI_one(cpu, vector);
 116 }
 117
 118 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
 119                                                 int vector)
 120 {
 121         unsigned int this_cpu = smp_processor_id();
 122         unsigned int cpu;
 123
 124         for_each_cpu(cpu, mask) {
 125                 if (cpu != this_cpu)
 126                         numachip_send_IPI_one(cpu, vector);
 127         }
 128 }
 129
 130 static void numachip_send_IPI_allbutself(int vector)
 131 {
 132         unsigned int this_cpu = smp_processor_id();
 133         unsigned int cpu;
 134
 135         for_each_online_cpu(cpu) {
 136                 if (cpu != this_cpu)
 137                         numachip_send_IPI_one(cpu, vector);
 138         }
 139 }
 140
 141 static void numachip_send_IPI_all(int vector)
 142 {
 143         numachip_send_IPI_mask(cpu_online_mask, vector);
 144 }
 145
 146 static void numachip_send_IPI_self(int vector)
 147 {
 148         __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
 149 }
 150
 151 static int __init numachip_probe(void)
 152 {
 153         return apic == &apic_numachip;
 154 }
 155
 156 static void __init map_csrs(void)
 157 {
 158         printk(KERN_INFO "NumaChip: Mapping local CSR space (%016llx - %016llx)\n",
 159                 NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_BASE + NUMACHIP_LCSR_SIZE - 1);
 160         init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
 161
 162         printk(KERN_INFO "NumaChip: Mapping global CSR space (%016llx - %016llx)\n",
 163                 NUMACHIP_GCSR_BASE, NUMACHIP_GCSR_BASE + NUMACHIP_GCSR_SIZE - 1);
 164         init_extra_mapping_uc(NUMACHIP_GCSR_BASE, NUMACHIP_GCSR_SIZE);
 165 }
 166
 167 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
 168 {
 169
 170         if (c->phys_proc_id != node) {
 171                 c->phys_proc_id = node;
 172                 per_cpu(cpu_llc_id, smp_processor_id()) = node;
 173         }
 174 }
 175
 176 static int __init numachip_system_init(void)
 177 {
 178         unsigned int val;
 179
 180         if (!numachip_system)
 181                 return 0;
 182
 183         x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
 184         x86_init.pci.arch_init = pci_numachip_init;
 185
 186         map_csrs();
 187
 188         val = read_lcsr(CSR_G0_NODE_IDS);
 189         printk(KERN_INFO "NumaChip: Local NodeID = %08x\n", val);
 190
 191         return 0;
 192 }
 193 early_initcall(numachip_system_init);
 194
 195 static int numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 196 {
 197         if (!strncmp(oem_id, "NUMASC", 6)) {
 198                 numachip_system = 1;
 199                 return 1;
 200         }
 201
 202         return 0;
 203 }
 204
 205 static const struct apic apic_numachip __refconst = {
 206
 207         .name                           = "NumaConnect system",
 208         .probe                          = numachip_probe,
 209         .acpi_madt_oem_check            = numachip_acpi_madt_oem_check,
 210         .apic_id_valid                  = numachip_apic_id_valid,
 211         .apic_id_registered             = numachip_apic_id_registered,
 212
 213         .irq_delivery_mode              = dest_Fixed,
 214         .irq_dest_mode                  = 0, /* physical */
 215
 216         .target_cpus                    = online_target_cpus,
 217         .disable_esr                    = 0,
 218         .dest_logical                   = 0,
 219         .check_apicid_used              = NULL,
 220         .check_apicid_present           = NULL,
 221
 222         .vector_allocation_domain       = default_vector_allocation_domain,
 223         .init_apic_ldr                  = flat_init_apic_ldr,
 224
 225         .ioapic_phys_id_map             = NULL,
 226         .setup_apic_routing             = NULL,
 227         .multi_timer_check              = NULL,
 228         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 229         .apicid_to_cpu_present          = NULL,
 230         .setup_portio_remap             = NULL,
 231         .check_phys_apicid_present      = default_check_phys_apicid_present,
 232         .enable_apic_mode               = NULL,
 233         .phys_pkg_id                    = numachip_phys_pkg_id,
 234         .mps_oem_check                  = NULL,
 235
 236         .get_apic_id                    = get_apic_id,
 237         .set_apic_id                    = set_apic_id,
 238         .apic_id_mask                   = 0xffU << 24,
 239
 240         .cpu_mask_to_apicid_and         = default_cpu_mask_to_apicid_and,
 241
 242         .send_IPI_mask                  = numachip_send_IPI_mask,
 243         .send_IPI_mask_allbutself       = numachip_send_IPI_mask_allbutself,
 244         .send_IPI_allbutself            = numachip_send_IPI_allbutself,
 245         .send_IPI_all                   = numachip_send_IPI_all,
 246         .send_IPI_self                  = numachip_send_IPI_self,
 247
 248         .wakeup_secondary_cpu           = numachip_wakeup_secondary,
 249         .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 250         .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 251         .wait_for_init_deassert         = NULL,
 252         .smp_callin_clear_local_apic    = NULL,
 253         .inquire_remote_apic            = NULL, /* REMRD not supported */
 254
 255         .read                           = native_apic_mem_read,
 256         .write                          = native_apic_mem_write,
 257         .eoi_write                      = native_apic_mem_write,
 258         .icr_read                       = native_apic_icr_read,
 259         .icr_write                      = native_apic_icr_write,
 260         .wait_icr_idle                  = native_apic_wait_icr_idle,
 261         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
 262 };
 263 apic_driver(apic_numachip);
 264