1 /* 2 * Copyright (C) 2006-2007 PA Semi, Inc 3 * 4 * Authors: Kip Walker, PA Semi 5 * Olof Johansson, PA Semi 6 * 7 * Maintained by: Olof Johansson <olof@lixom.net> 8 * 9 * Based on arch/powerpc/platforms/maple/setup.c 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25 #include <linux/errno.h> 26 #include <linux/kernel.h> 27 #include <linux/delay.h> 28 #include <linux/console.h> 29 #include <linux/pci.h> 30 #include <linux/of_platform.h> 31 #include <linux/gfp.h> 32 33 #include <asm/prom.h> 34 #include <asm/system.h> 35 #include <asm/iommu.h> 36 #include <asm/machdep.h> 37 #include <asm/mpic.h> 38 #include <asm/smp.h> 39 #include <asm/time.h> 40 #include <asm/mmu.h> 41 42 #include <pcmcia/ss.h> 43 #include <pcmcia/cistpl.h> 44 #include <pcmcia/ds.h> 45 46 #include "pasemi.h" 47 48 /* SDC reset register, must be pre-mapped at reset time */ 49 static void __iomem *reset_reg; 50 51 /* Various error status registers, must be pre-mapped at MCE time */ 52 53 #define MAX_MCE_REGS 32 54 struct mce_regs { 55 char *name; 56 void __iomem *addr; 57 }; 58 59 static struct mce_regs mce_regs[MAX_MCE_REGS]; 60 static int num_mce_regs; 61 static int nmi_virq = NO_IRQ; 62 63 64 static void pas_restart(char *cmd) 65 { 66 /* Need to put others cpu in hold loop so they're not sleeping */ 67 smp_send_stop(); 68 udelay(10000); 69 printk("Restarting...\n"); 70 while (1) 71 out_le32(reset_reg, 0x6000000); 72 } 73 74 #ifdef CONFIG_SMP 75 static arch_spinlock_t timebase_lock; 76 static unsigned long timebase; 77 78 static void __devinit pas_give_timebase(void) 79 { 80 unsigned long flags; 81 82 local_irq_save(flags); 83 hard_irq_disable(); 84 arch_spin_lock(&timebase_lock); 85 mtspr(SPRN_TBCTL, TBCTL_FREEZE); 86 isync(); 87 timebase = get_tb(); 88 arch_spin_unlock(&timebase_lock); 89 90 while (timebase) 91 barrier(); 92 mtspr(SPRN_TBCTL, TBCTL_RESTART); 93 local_irq_restore(flags); 94 } 95 96 static void __devinit pas_take_timebase(void) 97 { 98 while (!timebase) 99 smp_rmb(); 100 101 arch_spin_lock(&timebase_lock); 102 set_tb(timebase >> 32, timebase & 0xffffffff); 103 timebase = 0; 104 arch_spin_unlock(&timebase_lock); 105 } 106 107 struct smp_ops_t pas_smp_ops = { 108 .probe = smp_mpic_probe, 109 .message_pass = smp_mpic_message_pass, 110 .kick_cpu = smp_generic_kick_cpu, 111 .setup_cpu = smp_mpic_setup_cpu, 112 .give_timebase = pas_give_timebase, 113 .take_timebase = pas_take_timebase, 114 }; 115 #endif /* CONFIG_SMP */ 116 117 void __init pas_setup_arch(void) 118 { 119 #ifdef CONFIG_SMP 120 /* Setup SMP callback */ 121 smp_ops = &pas_smp_ops; 122 #endif 123 /* Lookup PCI hosts */ 124 pas_pci_init(); 125 126 #ifdef CONFIG_DUMMY_CONSOLE 127 conswitchp = &dummy_con; 128 #endif 129 130 /* Remap SDC register for doing reset */ 131 /* XXXOJN This should maybe come out of the device tree */ 132 reset_reg = ioremap(0xfc101100, 4); 133 } 134 135 static int __init pas_setup_mce_regs(void) 136 { 137 struct pci_dev *dev; 138 int reg; 139 140 /* Remap various SoC status registers for use by the MCE handler */ 141 142 reg = 0; 143 144 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL); 145 while (dev && reg < MAX_MCE_REGS) { 146 mce_regs[reg].name = kasprintf(GFP_KERNEL, 147 "mc%d_mcdebug_errsta", reg); 148 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730); 149 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev); 150 reg++; 151 } 152 153 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); 154 if (dev && reg+4 < MAX_MCE_REGS) { 155 mce_regs[reg].name = "iobdbg_IntStatus1"; 156 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438); 157 reg++; 158 mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg"; 159 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454); 160 reg++; 161 mce_regs[reg].name = "iobiom_IntStatus"; 162 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10); 163 reg++; 164 mce_regs[reg].name = "iobiom_IntDbgReg"; 165 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c); 166 reg++; 167 } 168 169 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL); 170 if (dev && reg+2 < MAX_MCE_REGS) { 171 mce_regs[reg].name = "l2csts_IntStatus"; 172 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200); 173 reg++; 174 mce_regs[reg].name = "l2csts_Cnt"; 175 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214); 176 reg++; 177 } 178 179 num_mce_regs = reg; 180 181 return 0; 182 } 183 machine_device_initcall(pasemi, pas_setup_mce_regs); 184 185 static __init void pas_init_IRQ(void) 186 { 187 struct device_node *np; 188 struct device_node *root, *mpic_node; 189 unsigned long openpic_addr; 190 const unsigned int *opprop; 191 int naddr, opplen; 192 int mpic_flags; 193 const unsigned int *nmiprop; 194 struct mpic *mpic; 195 196 mpic_node = NULL; 197 198 for_each_node_by_type(np, "interrupt-controller") 199 if (of_device_is_compatible(np, "open-pic")) { 200 mpic_node = np; 201 break; 202 } 203 if (!mpic_node) 204 for_each_node_by_type(np, "open-pic") { 205 mpic_node = np; 206 break; 207 } 208 if (!mpic_node) { 209 printk(KERN_ERR 210 "Failed to locate the MPIC interrupt controller\n"); 211 return; 212 } 213 214 /* Find address list in /platform-open-pic */ 215 root = of_find_node_by_path("/"); 216 naddr = of_n_addr_cells(root); 217 opprop = of_get_property(root, "platform-open-pic", &opplen); 218 if (!opprop) { 219 printk(KERN_ERR "No platform-open-pic property.\n"); 220 of_node_put(root); 221 return; 222 } 223 openpic_addr = of_read_number(opprop, naddr); 224 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); 225 226 mpic_flags = MPIC_PRIMARY | MPIC_LARGE_VECTORS | MPIC_NO_BIAS; 227 228 nmiprop = of_get_property(mpic_node, "nmi-source", NULL); 229 if (nmiprop) 230 mpic_flags |= MPIC_ENABLE_MCK; 231 232 mpic = mpic_alloc(mpic_node, openpic_addr, 233 mpic_flags, 0, 0, "PASEMI-OPIC"); 234 BUG_ON(!mpic); 235 236 mpic_assign_isu(mpic, 0, openpic_addr + 0x10000); 237 mpic_init(mpic); 238 /* The NMI/MCK source needs to be prio 15 */ 239 if (nmiprop) { 240 nmi_virq = irq_create_mapping(NULL, *nmiprop); 241 mpic_irq_set_priority(nmi_virq, 15); 242 set_irq_type(nmi_virq, IRQ_TYPE_EDGE_RISING); 243 mpic_unmask_irq(nmi_virq); 244 } 245 246 of_node_put(mpic_node); 247 of_node_put(root); 248 } 249 250 static void __init pas_progress(char *s, unsigned short hex) 251 { 252 printk("[%04x] : %s\n", hex, s ? s : ""); 253 } 254 255 256 static int pas_machine_check_handler(struct pt_regs *regs) 257 { 258 int cpu = smp_processor_id(); 259 unsigned long srr0, srr1, dsisr; 260 int dump_slb = 0; 261 int i; 262 263 srr0 = regs->nip; 264 srr1 = regs->msr; 265 266 if (nmi_virq != NO_IRQ && mpic_get_mcirq() == nmi_virq) { 267 printk(KERN_ERR "NMI delivered\n"); 268 debugger(regs); 269 mpic_end_irq(nmi_virq); 270 goto out; 271 } 272 273 dsisr = mfspr(SPRN_DSISR); 274 printk(KERN_ERR "Machine Check on CPU %d\n", cpu); 275 printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1); 276 printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar); 277 printk(KERN_ERR "BER 0x%016lx MER 0x%016lx\n", mfspr(SPRN_PA6T_BER), 278 mfspr(SPRN_PA6T_MER)); 279 printk(KERN_ERR "IER 0x%016lx DER 0x%016lx\n", mfspr(SPRN_PA6T_IER), 280 mfspr(SPRN_PA6T_DER)); 281 printk(KERN_ERR "Cause:\n"); 282 283 if (srr1 & 0x200000) 284 printk(KERN_ERR "Signalled by SDC\n"); 285 286 if (srr1 & 0x100000) { 287 printk(KERN_ERR "Load/Store detected error:\n"); 288 if (dsisr & 0x8000) 289 printk(KERN_ERR "D-cache ECC double-bit error or bus error\n"); 290 if (dsisr & 0x4000) 291 printk(KERN_ERR "LSU snoop response error\n"); 292 if (dsisr & 0x2000) { 293 printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n"); 294 dump_slb = 1; 295 } 296 if (dsisr & 0x1000) 297 printk(KERN_ERR "Recoverable Duptags\n"); 298 if (dsisr & 0x800) 299 printk(KERN_ERR "Recoverable D-cache parity error count overflow\n"); 300 if (dsisr & 0x400) 301 printk(KERN_ERR "TLB parity error count overflow\n"); 302 } 303 304 if (srr1 & 0x80000) 305 printk(KERN_ERR "Bus Error\n"); 306 307 if (srr1 & 0x40000) { 308 printk(KERN_ERR "I-side SLB multiple hit\n"); 309 dump_slb = 1; 310 } 311 312 if (srr1 & 0x20000) 313 printk(KERN_ERR "I-cache parity error hit\n"); 314 315 if (num_mce_regs == 0) 316 printk(KERN_ERR "No MCE registers mapped yet, can't dump\n"); 317 else 318 printk(KERN_ERR "SoC debug registers:\n"); 319 320 for (i = 0; i < num_mce_regs; i++) 321 printk(KERN_ERR "%s: 0x%08x\n", mce_regs[i].name, 322 in_le32(mce_regs[i].addr)); 323 324 if (dump_slb) { 325 unsigned long e, v; 326 int i; 327 328 printk(KERN_ERR "slb contents:\n"); 329 for (i = 0; i < mmu_slb_size; i++) { 330 asm volatile("slbmfee %0,%1" : "=r" (e) : "r" (i)); 331 asm volatile("slbmfev %0,%1" : "=r" (v) : "r" (i)); 332 printk(KERN_ERR "%02d %016lx %016lx\n", i, e, v); 333 } 334 } 335 336 out: 337 /* SRR1[62] is from MSR[62] if recoverable, so pass that back */ 338 return !!(srr1 & 0x2); 339 } 340 341 static void __init pas_init_early(void) 342 { 343 iommu_init_early_pasemi(); 344 } 345 346 #ifdef CONFIG_PCMCIA 347 static int pcmcia_notify(struct notifier_block *nb, unsigned long action, 348 void *data) 349 { 350 struct device *dev = data; 351 struct device *parent; 352 struct pcmcia_device *pdev = to_pcmcia_dev(dev); 353 354 /* We are only intereted in device addition */ 355 if (action != BUS_NOTIFY_ADD_DEVICE) 356 return 0; 357 358 parent = pdev->socket->dev.parent; 359 360 /* We know electra_cf devices will always have of_node set, since 361 * electra_cf is an of_platform driver. 362 */ 363 if (!parent->of_node) 364 return 0; 365 366 if (!of_device_is_compatible(parent->of_node, "electra-cf")) 367 return 0; 368 369 /* We use the direct ops for localbus */ 370 dev->archdata.dma_ops = &dma_direct_ops; 371 372 return 0; 373 } 374 375 static struct notifier_block pcmcia_notifier = { 376 .notifier_call = pcmcia_notify, 377 }; 378 379 static inline void pasemi_pcmcia_init(void) 380 { 381 extern struct bus_type pcmcia_bus_type; 382 383 bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier); 384 } 385 386 #else 387 388 static inline void pasemi_pcmcia_init(void) 389 { 390 } 391 392 #endif 393 394 395 static struct of_device_id pasemi_bus_ids[] = { 396 /* Unfortunately needed for legacy firmwares */ 397 { .type = "localbus", }, 398 { .type = "sdc", }, 399 /* These are the proper entries, which newer firmware uses */ 400 { .compatible = "pasemi,localbus", }, 401 { .compatible = "pasemi,sdc", }, 402 {}, 403 }; 404 405 static int __init pasemi_publish_devices(void) 406 { 407 pasemi_pcmcia_init(); 408 409 /* Publish OF platform devices for SDC and other non-PCI devices */ 410 of_platform_bus_probe(NULL, pasemi_bus_ids, NULL); 411 412 return 0; 413 } 414 machine_device_initcall(pasemi, pasemi_publish_devices); 415 416 417 /* 418 * Called very early, MMU is off, device-tree isn't unflattened 419 */ 420 static int __init pas_probe(void) 421 { 422 unsigned long root = of_get_flat_dt_root(); 423 424 if (!of_flat_dt_is_compatible(root, "PA6T-1682M") && 425 !of_flat_dt_is_compatible(root, "pasemi,pwrficient")) 426 return 0; 427 428 hpte_init_native(); 429 430 alloc_iobmap_l2(); 431 432 return 1; 433 } 434 435 define_machine(pasemi) { 436 .name = "PA Semi PWRficient", 437 .probe = pas_probe, 438 .setup_arch = pas_setup_arch, 439 .init_early = pas_init_early, 440 .init_IRQ = pas_init_IRQ, 441 .get_irq = mpic_get_irq, 442 .restart = pas_restart, 443 .get_boot_time = pas_get_boot_time, 444 .calibrate_decr = generic_calibrate_decr, 445 .progress = pas_progress, 446 .machine_check_exception = pas_machine_check_handler, 447 }; 448