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/init.h> 15 16 #include <asm/numachip/numachip.h> 17 #include <asm/numachip/numachip_csr.h> 18 #include <asm/ipi.h> 19 #include <asm/apic_flat_64.h> 20 #include <asm/pgtable.h> 21 #include <asm/pci_x86.h> 22 23 u8 numachip_system __read_mostly; 24 static const struct apic apic_numachip1; 25 static const struct apic apic_numachip2; 26 static void (*numachip_apic_icr_write)(int apicid, unsigned int val) __read_mostly; 27 28 static unsigned int numachip1_get_apic_id(unsigned long x) 29 { 30 unsigned long value; 31 unsigned int id = (x >> 24) & 0xff; 32 33 if (static_cpu_has_safe(X86_FEATURE_NODEID_MSR)) { 34 rdmsrl(MSR_FAM10H_NODE_ID, value); 35 id |= (value << 2) & 0xff00; 36 } 37 38 return id; 39 } 40 41 static unsigned long numachip1_set_apic_id(unsigned int id) 42 { 43 unsigned long x; 44 45 x = ((id & 0xffU) << 24); 46 return x; 47 } 48 49 static unsigned int numachip2_get_apic_id(unsigned long x) 50 { 51 u64 mcfg; 52 53 rdmsrl(MSR_FAM10H_MMIO_CONF_BASE, mcfg); 54 return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24); 55 } 56 57 static unsigned long numachip2_set_apic_id(unsigned int id) 58 { 59 return id << 24; 60 } 61 62 static int numachip_apic_id_valid(int apicid) 63 { 64 /* Trust what bootloader passes in MADT */ 65 return 1; 66 } 67 68 static int numachip_apic_id_registered(void) 69 { 70 return 1; 71 } 72 73 static int numachip_phys_pkg_id(int initial_apic_id, int index_msb) 74 { 75 return initial_apic_id >> index_msb; 76 } 77 78 static void numachip1_apic_icr_write(int apicid, unsigned int val) 79 { 80 write_lcsr(CSR_G3_EXT_IRQ_GEN, (apicid << 16) | val); 81 } 82 83 static void numachip2_apic_icr_write(int apicid, unsigned int val) 84 { 85 numachip2_write32_lcsr(NUMACHIP2_APIC_ICR, (apicid << 12) | val); 86 } 87 88 static int numachip_wakeup_secondary(int phys_apicid, unsigned long start_rip) 89 { 90 numachip_apic_icr_write(phys_apicid, APIC_DM_INIT); 91 numachip_apic_icr_write(phys_apicid, APIC_DM_STARTUP | 92 (start_rip >> 12)); 93 94 return 0; 95 } 96 97 static void numachip_send_IPI_one(int cpu, int vector) 98 { 99 int local_apicid, apicid = per_cpu(x86_cpu_to_apicid, cpu); 100 unsigned int dmode; 101 102 preempt_disable(); 103 local_apicid = __this_cpu_read(x86_cpu_to_apicid); 104 105 /* Send via local APIC where non-local part matches */ 106 if (!((apicid ^ local_apicid) >> NUMACHIP_LAPIC_BITS)) { 107 unsigned long flags; 108 109 local_irq_save(flags); 110 __default_send_IPI_dest_field(apicid, vector, 111 APIC_DEST_PHYSICAL); 112 local_irq_restore(flags); 113 preempt_enable(); 114 return; 115 } 116 preempt_enable(); 117 118 dmode = (vector == NMI_VECTOR) ? APIC_DM_NMI : APIC_DM_FIXED; 119 numachip_apic_icr_write(apicid, dmode | vector); 120 } 121 122 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector) 123 { 124 unsigned int cpu; 125 126 for_each_cpu(cpu, mask) 127 numachip_send_IPI_one(cpu, vector); 128 } 129 130 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask, 131 int vector) 132 { 133 unsigned int this_cpu = smp_processor_id(); 134 unsigned int cpu; 135 136 for_each_cpu(cpu, mask) { 137 if (cpu != this_cpu) 138 numachip_send_IPI_one(cpu, vector); 139 } 140 } 141 142 static void numachip_send_IPI_allbutself(int vector) 143 { 144 unsigned int this_cpu = smp_processor_id(); 145 unsigned int cpu; 146 147 for_each_online_cpu(cpu) { 148 if (cpu != this_cpu) 149 numachip_send_IPI_one(cpu, vector); 150 } 151 } 152 153 static void numachip_send_IPI_all(int vector) 154 { 155 numachip_send_IPI_mask(cpu_online_mask, vector); 156 } 157 158 static void numachip_send_IPI_self(int vector) 159 { 160 apic_write(APIC_SELF_IPI, vector); 161 } 162 163 static int __init numachip1_probe(void) 164 { 165 return apic == &apic_numachip1; 166 } 167 168 static int __init numachip2_probe(void) 169 { 170 return apic == &apic_numachip2; 171 } 172 173 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node) 174 { 175 u64 val; 176 u32 nodes = 1; 177 178 this_cpu_write(cpu_llc_id, node); 179 180 /* Account for nodes per socket in multi-core-module processors */ 181 if (static_cpu_has_safe(X86_FEATURE_NODEID_MSR)) { 182 rdmsrl(MSR_FAM10H_NODE_ID, val); 183 nodes = ((val >> 3) & 7) + 1; 184 } 185 186 c->phys_proc_id = node / nodes; 187 } 188 189 static int __init numachip_system_init(void) 190 { 191 /* Map the LCSR area and set up the apic_icr_write function */ 192 switch (numachip_system) { 193 case 1: 194 init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE); 195 numachip_apic_icr_write = numachip1_apic_icr_write; 196 break; 197 case 2: 198 init_extra_mapping_uc(NUMACHIP2_LCSR_BASE, NUMACHIP2_LCSR_SIZE); 199 numachip_apic_icr_write = numachip2_apic_icr_write; 200 break; 201 default: 202 return 0; 203 } 204 205 x86_cpuinit.fixup_cpu_id = fixup_cpu_id; 206 x86_init.pci.arch_init = pci_numachip_init; 207 208 return 0; 209 } 210 early_initcall(numachip_system_init); 211 212 static int numachip1_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 213 { 214 if ((strncmp(oem_id, "NUMASC", 6) != 0) || 215 (strncmp(oem_table_id, "NCONNECT", 8) != 0)) 216 return 0; 217 218 numachip_system = 1; 219 220 return 1; 221 } 222 223 static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 224 { 225 if ((strncmp(oem_id, "NUMASC", 6) != 0) || 226 (strncmp(oem_table_id, "NCONECT2", 8) != 0)) 227 return 0; 228 229 numachip_system = 2; 230 231 return 1; 232 } 233 234 /* APIC IPIs are queued */ 235 static void numachip_apic_wait_icr_idle(void) 236 { 237 } 238 239 /* APIC NMI IPIs are queued */ 240 static u32 numachip_safe_apic_wait_icr_idle(void) 241 { 242 return 0; 243 } 244 245 static const struct apic apic_numachip1 __refconst = { 246 .name = "NumaConnect system", 247 .probe = numachip1_probe, 248 .acpi_madt_oem_check = numachip1_acpi_madt_oem_check, 249 .apic_id_valid = numachip_apic_id_valid, 250 .apic_id_registered = numachip_apic_id_registered, 251 252 .irq_delivery_mode = dest_Fixed, 253 .irq_dest_mode = 0, /* physical */ 254 255 .target_cpus = online_target_cpus, 256 .disable_esr = 0, 257 .dest_logical = 0, 258 .check_apicid_used = NULL, 259 260 .vector_allocation_domain = default_vector_allocation_domain, 261 .init_apic_ldr = flat_init_apic_ldr, 262 263 .ioapic_phys_id_map = NULL, 264 .setup_apic_routing = NULL, 265 .cpu_present_to_apicid = default_cpu_present_to_apicid, 266 .apicid_to_cpu_present = NULL, 267 .check_phys_apicid_present = default_check_phys_apicid_present, 268 .phys_pkg_id = numachip_phys_pkg_id, 269 270 .get_apic_id = numachip1_get_apic_id, 271 .set_apic_id = numachip1_set_apic_id, 272 .apic_id_mask = 0xffU << 24, 273 274 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, 275 276 .send_IPI_mask = numachip_send_IPI_mask, 277 .send_IPI_mask_allbutself = numachip_send_IPI_mask_allbutself, 278 .send_IPI_allbutself = numachip_send_IPI_allbutself, 279 .send_IPI_all = numachip_send_IPI_all, 280 .send_IPI_self = numachip_send_IPI_self, 281 282 .wakeup_secondary_cpu = numachip_wakeup_secondary, 283 .inquire_remote_apic = NULL, /* REMRD not supported */ 284 285 .read = native_apic_mem_read, 286 .write = native_apic_mem_write, 287 .eoi_write = native_apic_mem_write, 288 .icr_read = native_apic_icr_read, 289 .icr_write = native_apic_icr_write, 290 .wait_icr_idle = numachip_apic_wait_icr_idle, 291 .safe_wait_icr_idle = numachip_safe_apic_wait_icr_idle, 292 }; 293 294 apic_driver(apic_numachip1); 295 296 static const struct apic apic_numachip2 __refconst = { 297 .name = "NumaConnect2 system", 298 .probe = numachip2_probe, 299 .acpi_madt_oem_check = numachip2_acpi_madt_oem_check, 300 .apic_id_valid = numachip_apic_id_valid, 301 .apic_id_registered = numachip_apic_id_registered, 302 303 .irq_delivery_mode = dest_Fixed, 304 .irq_dest_mode = 0, /* physical */ 305 306 .target_cpus = online_target_cpus, 307 .disable_esr = 0, 308 .dest_logical = 0, 309 .check_apicid_used = NULL, 310 311 .vector_allocation_domain = default_vector_allocation_domain, 312 .init_apic_ldr = flat_init_apic_ldr, 313 314 .ioapic_phys_id_map = NULL, 315 .setup_apic_routing = NULL, 316 .cpu_present_to_apicid = default_cpu_present_to_apicid, 317 .apicid_to_cpu_present = NULL, 318 .check_phys_apicid_present = default_check_phys_apicid_present, 319 .phys_pkg_id = numachip_phys_pkg_id, 320 321 .get_apic_id = numachip2_get_apic_id, 322 .set_apic_id = numachip2_set_apic_id, 323 .apic_id_mask = 0xffU << 24, 324 325 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, 326 327 .send_IPI_mask = numachip_send_IPI_mask, 328 .send_IPI_mask_allbutself = numachip_send_IPI_mask_allbutself, 329 .send_IPI_allbutself = numachip_send_IPI_allbutself, 330 .send_IPI_all = numachip_send_IPI_all, 331 .send_IPI_self = numachip_send_IPI_self, 332 333 .wakeup_secondary_cpu = numachip_wakeup_secondary, 334 .inquire_remote_apic = NULL, /* REMRD not supported */ 335 336 .read = native_apic_mem_read, 337 .write = native_apic_mem_write, 338 .eoi_write = native_apic_mem_write, 339 .icr_read = native_apic_icr_read, 340 .icr_write = native_apic_icr_write, 341 .wait_icr_idle = numachip_apic_wait_icr_idle, 342 .safe_wait_icr_idle = numachip_safe_apic_wait_icr_idle, 343 }; 344 345 apic_driver(apic_numachip2); 346