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 #include <linux/types.h> 14 #include <linux/init.h> 15 #include <linux/pgtable.h> 16 17 #include <asm/numachip/numachip.h> 18 #include <asm/numachip/numachip_csr.h> 19 20 21 #include "local.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(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 u32 numachip1_set_apic_id(unsigned int id) 42 { 43 return (id & 0xff) << 24; 44 } 45 46 static unsigned int numachip2_get_apic_id(unsigned long x) 47 { 48 u64 mcfg; 49 50 rdmsrl(MSR_FAM10H_MMIO_CONF_BASE, mcfg); 51 return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24); 52 } 53 54 static u32 numachip2_set_apic_id(unsigned int id) 55 { 56 return id << 24; 57 } 58 59 static int numachip_apic_id_valid(u32 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 1; 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 void numachip1_apic_icr_write(int apicid, unsigned int val) 76 { 77 write_lcsr(CSR_G3_EXT_IRQ_GEN, (apicid << 16) | val); 78 } 79 80 static void numachip2_apic_icr_write(int apicid, unsigned int val) 81 { 82 numachip2_write32_lcsr(NUMACHIP2_APIC_ICR, (apicid << 12) | val); 83 } 84 85 static int numachip_wakeup_secondary(int phys_apicid, unsigned long start_rip) 86 { 87 numachip_apic_icr_write(phys_apicid, APIC_DM_INIT); 88 numachip_apic_icr_write(phys_apicid, APIC_DM_STARTUP | 89 (start_rip >> 12)); 90 91 return 0; 92 } 93 94 static void numachip_send_IPI_one(int cpu, int vector) 95 { 96 int local_apicid, apicid = per_cpu(x86_cpu_to_apicid, cpu); 97 unsigned int dmode; 98 99 preempt_disable(); 100 local_apicid = __this_cpu_read(x86_cpu_to_apicid); 101 102 /* Send via local APIC where non-local part matches */ 103 if (!((apicid ^ local_apicid) >> NUMACHIP_LAPIC_BITS)) { 104 unsigned long flags; 105 106 local_irq_save(flags); 107 __default_send_IPI_dest_field(apicid, vector, 108 APIC_DEST_PHYSICAL); 109 local_irq_restore(flags); 110 preempt_enable(); 111 return; 112 } 113 preempt_enable(); 114 115 dmode = (vector == NMI_VECTOR) ? APIC_DM_NMI : APIC_DM_FIXED; 116 numachip_apic_icr_write(apicid, dmode | vector); 117 } 118 119 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector) 120 { 121 unsigned int cpu; 122 123 for_each_cpu(cpu, mask) 124 numachip_send_IPI_one(cpu, vector); 125 } 126 127 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask, 128 int vector) 129 { 130 unsigned int this_cpu = smp_processor_id(); 131 unsigned int cpu; 132 133 for_each_cpu(cpu, mask) { 134 if (cpu != this_cpu) 135 numachip_send_IPI_one(cpu, vector); 136 } 137 } 138 139 static void numachip_send_IPI_allbutself(int vector) 140 { 141 unsigned int this_cpu = smp_processor_id(); 142 unsigned int cpu; 143 144 for_each_online_cpu(cpu) { 145 if (cpu != this_cpu) 146 numachip_send_IPI_one(cpu, vector); 147 } 148 } 149 150 static void numachip_send_IPI_all(int vector) 151 { 152 numachip_send_IPI_mask(cpu_online_mask, vector); 153 } 154 155 static void numachip_send_IPI_self(int vector) 156 { 157 apic_write(APIC_SELF_IPI, vector); 158 } 159 160 static int __init numachip1_probe(void) 161 { 162 return apic == &apic_numachip1; 163 } 164 165 static int __init numachip2_probe(void) 166 { 167 return apic == &apic_numachip2; 168 } 169 170 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node) 171 { 172 u64 val; 173 u32 nodes = 1; 174 175 this_cpu_write(cpu_llc_id, node); 176 177 /* Account for nodes per socket in multi-core-module processors */ 178 if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) { 179 rdmsrl(MSR_FAM10H_NODE_ID, val); 180 nodes = ((val >> 3) & 7) + 1; 181 } 182 183 c->phys_proc_id = node / nodes; 184 } 185 186 static int __init numachip_system_init(void) 187 { 188 /* Map the LCSR area and set up the apic_icr_write function */ 189 switch (numachip_system) { 190 case 1: 191 init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE); 192 numachip_apic_icr_write = numachip1_apic_icr_write; 193 break; 194 case 2: 195 init_extra_mapping_uc(NUMACHIP2_LCSR_BASE, NUMACHIP2_LCSR_SIZE); 196 numachip_apic_icr_write = numachip2_apic_icr_write; 197 break; 198 default: 199 return 0; 200 } 201 202 x86_cpuinit.fixup_cpu_id = fixup_cpu_id; 203 x86_init.pci.arch_init = pci_numachip_init; 204 205 return 0; 206 } 207 early_initcall(numachip_system_init); 208 209 static int numachip1_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 210 { 211 if ((strncmp(oem_id, "NUMASC", 6) != 0) || 212 (strncmp(oem_table_id, "NCONNECT", 8) != 0)) 213 return 0; 214 215 numachip_system = 1; 216 217 return 1; 218 } 219 220 static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 221 { 222 if ((strncmp(oem_id, "NUMASC", 6) != 0) || 223 (strncmp(oem_table_id, "NCONECT2", 8) != 0)) 224 return 0; 225 226 numachip_system = 2; 227 228 return 1; 229 } 230 231 /* APIC IPIs are queued */ 232 static void numachip_apic_wait_icr_idle(void) 233 { 234 } 235 236 /* APIC NMI IPIs are queued */ 237 static u32 numachip_safe_apic_wait_icr_idle(void) 238 { 239 return 0; 240 } 241 242 static const struct apic apic_numachip1 __refconst = { 243 .name = "NumaConnect system", 244 .probe = numachip1_probe, 245 .acpi_madt_oem_check = numachip1_acpi_madt_oem_check, 246 .apic_id_valid = numachip_apic_id_valid, 247 .apic_id_registered = numachip_apic_id_registered, 248 249 .delivery_mode = APIC_DELIVERY_MODE_FIXED, 250 .dest_mode_logical = false, 251 252 .disable_esr = 0, 253 254 .check_apicid_used = NULL, 255 .init_apic_ldr = flat_init_apic_ldr, 256 .ioapic_phys_id_map = NULL, 257 .setup_apic_routing = NULL, 258 .cpu_present_to_apicid = default_cpu_present_to_apicid, 259 .apicid_to_cpu_present = NULL, 260 .check_phys_apicid_present = default_check_phys_apicid_present, 261 .phys_pkg_id = numachip_phys_pkg_id, 262 263 .get_apic_id = numachip1_get_apic_id, 264 .set_apic_id = numachip1_set_apic_id, 265 266 .calc_dest_apicid = apic_default_calc_apicid, 267 268 .send_IPI = numachip_send_IPI_one, 269 .send_IPI_mask = numachip_send_IPI_mask, 270 .send_IPI_mask_allbutself = numachip_send_IPI_mask_allbutself, 271 .send_IPI_allbutself = numachip_send_IPI_allbutself, 272 .send_IPI_all = numachip_send_IPI_all, 273 .send_IPI_self = numachip_send_IPI_self, 274 275 .wakeup_secondary_cpu = numachip_wakeup_secondary, 276 .inquire_remote_apic = NULL, /* REMRD not supported */ 277 278 .read = native_apic_mem_read, 279 .write = native_apic_mem_write, 280 .eoi_write = native_apic_mem_write, 281 .icr_read = native_apic_icr_read, 282 .icr_write = native_apic_icr_write, 283 .wait_icr_idle = numachip_apic_wait_icr_idle, 284 .safe_wait_icr_idle = numachip_safe_apic_wait_icr_idle, 285 }; 286 287 apic_driver(apic_numachip1); 288 289 static const struct apic apic_numachip2 __refconst = { 290 .name = "NumaConnect2 system", 291 .probe = numachip2_probe, 292 .acpi_madt_oem_check = numachip2_acpi_madt_oem_check, 293 .apic_id_valid = numachip_apic_id_valid, 294 .apic_id_registered = numachip_apic_id_registered, 295 296 .delivery_mode = APIC_DELIVERY_MODE_FIXED, 297 .dest_mode_logical = false, 298 299 .disable_esr = 0, 300 301 .check_apicid_used = NULL, 302 .init_apic_ldr = flat_init_apic_ldr, 303 .ioapic_phys_id_map = NULL, 304 .setup_apic_routing = NULL, 305 .cpu_present_to_apicid = default_cpu_present_to_apicid, 306 .apicid_to_cpu_present = NULL, 307 .check_phys_apicid_present = default_check_phys_apicid_present, 308 .phys_pkg_id = numachip_phys_pkg_id, 309 310 .get_apic_id = numachip2_get_apic_id, 311 .set_apic_id = numachip2_set_apic_id, 312 313 .calc_dest_apicid = apic_default_calc_apicid, 314 315 .send_IPI = numachip_send_IPI_one, 316 .send_IPI_mask = numachip_send_IPI_mask, 317 .send_IPI_mask_allbutself = numachip_send_IPI_mask_allbutself, 318 .send_IPI_allbutself = numachip_send_IPI_allbutself, 319 .send_IPI_all = numachip_send_IPI_all, 320 .send_IPI_self = numachip_send_IPI_self, 321 322 .wakeup_secondary_cpu = numachip_wakeup_secondary, 323 .inquire_remote_apic = NULL, /* REMRD not supported */ 324 325 .read = native_apic_mem_read, 326 .write = native_apic_mem_write, 327 .eoi_write = native_apic_mem_write, 328 .icr_read = native_apic_icr_read, 329 .icr_write = native_apic_icr_write, 330 .wait_icr_idle = numachip_apic_wait_icr_idle, 331 .safe_wait_icr_idle = numachip_safe_apic_wait_icr_idle, 332 }; 333 334 apic_driver(apic_numachip2); 335