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