1a88b5ba8SSam Ravnborg /* 2a88b5ba8SSam Ravnborg * Procedures for creating, accessing and interpreting the device tree. 3a88b5ba8SSam Ravnborg * 4a88b5ba8SSam Ravnborg * Paul Mackerras August 1996. 5a88b5ba8SSam Ravnborg * Copyright (C) 1996-2005 Paul Mackerras. 6a88b5ba8SSam Ravnborg * 7a88b5ba8SSam Ravnborg * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. 8a88b5ba8SSam Ravnborg * {engebret|bergner}@us.ibm.com 9a88b5ba8SSam Ravnborg * 10a88b5ba8SSam Ravnborg * Adapted for sparc64 by David S. Miller davem@davemloft.net 11a88b5ba8SSam Ravnborg * 12a88b5ba8SSam Ravnborg * This program is free software; you can redistribute it and/or 13a88b5ba8SSam Ravnborg * modify it under the terms of the GNU General Public License 14a88b5ba8SSam Ravnborg * as published by the Free Software Foundation; either version 15a88b5ba8SSam Ravnborg * 2 of the License, or (at your option) any later version. 16a88b5ba8SSam Ravnborg */ 17a88b5ba8SSam Ravnborg 18a88b5ba8SSam Ravnborg #include <linux/kernel.h> 19a88b5ba8SSam Ravnborg #include <linux/types.h> 20a88b5ba8SSam Ravnborg #include <linux/string.h> 21a88b5ba8SSam Ravnborg #include <linux/mm.h> 2295f72d1eSYinghai Lu #include <linux/memblock.h> 23035ebefcSAndres Salomon #include <linux/of.h> 24a88b5ba8SSam Ravnborg 25a88b5ba8SSam Ravnborg #include <asm/prom.h> 26a88b5ba8SSam Ravnborg #include <asm/oplib.h> 27a88b5ba8SSam Ravnborg #include <asm/irq.h> 28a88b5ba8SSam Ravnborg #include <asm/asi.h> 29a88b5ba8SSam Ravnborg #include <asm/upa.h> 30a88b5ba8SSam Ravnborg #include <asm/smp.h> 31a88b5ba8SSam Ravnborg 32657f201dSDavid S. Miller #include "prom.h" 33a88b5ba8SSam Ravnborg 34efeac2f8SDavid S. Miller void * __init prom_early_alloc(unsigned long size) 35a88b5ba8SSam Ravnborg { 3695f72d1eSYinghai Lu unsigned long paddr = memblock_alloc(size, SMP_CACHE_BYTES); 37a88b5ba8SSam Ravnborg void *ret; 38a88b5ba8SSam Ravnborg 39a88b5ba8SSam Ravnborg if (!paddr) { 405da444aaSAkinobu Mita prom_printf("prom_early_alloc(%lu) failed\n", size); 41a88b5ba8SSam Ravnborg prom_halt(); 42a88b5ba8SSam Ravnborg } 43a88b5ba8SSam Ravnborg 44a88b5ba8SSam Ravnborg ret = __va(paddr); 45a88b5ba8SSam Ravnborg memset(ret, 0, size); 46a88b5ba8SSam Ravnborg prom_early_allocated += size; 47a88b5ba8SSam Ravnborg 48a88b5ba8SSam Ravnborg return ret; 49a88b5ba8SSam Ravnborg } 50a88b5ba8SSam Ravnborg 51a88b5ba8SSam Ravnborg /* The following routines deal with the black magic of fully naming a 52a88b5ba8SSam Ravnborg * node. 53a88b5ba8SSam Ravnborg * 54a88b5ba8SSam Ravnborg * Certain well known named nodes are just the simple name string. 55a88b5ba8SSam Ravnborg * 56a88b5ba8SSam Ravnborg * Actual devices have an address specifier appended to the base name 57a88b5ba8SSam Ravnborg * string, like this "foo@addr". The "addr" can be in any number of 58a88b5ba8SSam Ravnborg * formats, and the platform plus the type of the node determine the 59a88b5ba8SSam Ravnborg * format and how it is constructed. 60a88b5ba8SSam Ravnborg * 61a88b5ba8SSam Ravnborg * For children of the ROOT node, the naming convention is fixed and 62a88b5ba8SSam Ravnborg * determined by whether this is a sun4u or sun4v system. 63a88b5ba8SSam Ravnborg * 64a88b5ba8SSam Ravnborg * For children of other nodes, it is bus type specific. So 65a88b5ba8SSam Ravnborg * we walk up the tree until we discover a "device_type" property 66a88b5ba8SSam Ravnborg * we recognize and we go from there. 67a88b5ba8SSam Ravnborg * 68a88b5ba8SSam Ravnborg * As an example, the boot device on my workstation has a full path: 69a88b5ba8SSam Ravnborg * 70a88b5ba8SSam Ravnborg * /pci@1e,600000/ide@d/disk@0,0:c 71a88b5ba8SSam Ravnborg */ 72a88b5ba8SSam Ravnborg static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf) 73a88b5ba8SSam Ravnborg { 74a88b5ba8SSam Ravnborg struct linux_prom64_registers *regs; 75a88b5ba8SSam Ravnborg struct property *rprop; 76a88b5ba8SSam Ravnborg u32 high_bits, low_bits, type; 77a88b5ba8SSam Ravnborg 78a88b5ba8SSam Ravnborg rprop = of_find_property(dp, "reg", NULL); 79a88b5ba8SSam Ravnborg if (!rprop) 80a88b5ba8SSam Ravnborg return; 81a88b5ba8SSam Ravnborg 82a88b5ba8SSam Ravnborg regs = rprop->value; 83035ebefcSAndres Salomon if (!of_node_is_root(dp->parent)) { 84a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 85a88b5ba8SSam Ravnborg dp->name, 86a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr >> 32UL), 87a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr & 0xffffffffUL)); 88a88b5ba8SSam Ravnborg return; 89a88b5ba8SSam Ravnborg } 90a88b5ba8SSam Ravnborg 91a88b5ba8SSam Ravnborg type = regs->phys_addr >> 60UL; 92a88b5ba8SSam Ravnborg high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL; 93a88b5ba8SSam Ravnborg low_bits = (regs->phys_addr & 0xffffffffUL); 94a88b5ba8SSam Ravnborg 95a88b5ba8SSam Ravnborg if (type == 0 || type == 8) { 96a88b5ba8SSam Ravnborg const char *prefix = (type == 0) ? "m" : "i"; 97a88b5ba8SSam Ravnborg 98a88b5ba8SSam Ravnborg if (low_bits) 99a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%s%x,%x", 100a88b5ba8SSam Ravnborg dp->name, prefix, 101a88b5ba8SSam Ravnborg high_bits, low_bits); 102a88b5ba8SSam Ravnborg else 103a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%s%x", 104a88b5ba8SSam Ravnborg dp->name, 105a88b5ba8SSam Ravnborg prefix, 106a88b5ba8SSam Ravnborg high_bits); 107a88b5ba8SSam Ravnborg } else if (type == 12) { 108a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x", 109a88b5ba8SSam Ravnborg dp->name, high_bits); 110a88b5ba8SSam Ravnborg } 111a88b5ba8SSam Ravnborg } 112a88b5ba8SSam Ravnborg 113a88b5ba8SSam Ravnborg static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf) 114a88b5ba8SSam Ravnborg { 115a88b5ba8SSam Ravnborg struct linux_prom64_registers *regs; 116a88b5ba8SSam Ravnborg struct property *prop; 117a88b5ba8SSam Ravnborg 118a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 119a88b5ba8SSam Ravnborg if (!prop) 120a88b5ba8SSam Ravnborg return; 121a88b5ba8SSam Ravnborg 122a88b5ba8SSam Ravnborg regs = prop->value; 123035ebefcSAndres Salomon if (!of_node_is_root(dp->parent)) { 124a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 125a88b5ba8SSam Ravnborg dp->name, 126a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr >> 32UL), 127a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr & 0xffffffffUL)); 128a88b5ba8SSam Ravnborg return; 129a88b5ba8SSam Ravnborg } 130a88b5ba8SSam Ravnborg 131a88b5ba8SSam Ravnborg prop = of_find_property(dp, "upa-portid", NULL); 132a88b5ba8SSam Ravnborg if (!prop) 133a88b5ba8SSam Ravnborg prop = of_find_property(dp, "portid", NULL); 134a88b5ba8SSam Ravnborg if (prop) { 135a88b5ba8SSam Ravnborg unsigned long mask = 0xffffffffUL; 136a88b5ba8SSam Ravnborg 137a88b5ba8SSam Ravnborg if (tlb_type >= cheetah) 138a88b5ba8SSam Ravnborg mask = 0x7fffff; 139a88b5ba8SSam Ravnborg 140a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 141a88b5ba8SSam Ravnborg dp->name, 142a88b5ba8SSam Ravnborg *(u32 *)prop->value, 143a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr & mask)); 144a88b5ba8SSam Ravnborg } 145a88b5ba8SSam Ravnborg } 146a88b5ba8SSam Ravnborg 147a88b5ba8SSam Ravnborg /* "name@slot,offset" */ 148a88b5ba8SSam Ravnborg static void __init sbus_path_component(struct device_node *dp, char *tmp_buf) 149a88b5ba8SSam Ravnborg { 150a88b5ba8SSam Ravnborg struct linux_prom_registers *regs; 151a88b5ba8SSam Ravnborg struct property *prop; 152a88b5ba8SSam Ravnborg 153a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 154a88b5ba8SSam Ravnborg if (!prop) 155a88b5ba8SSam Ravnborg return; 156a88b5ba8SSam Ravnborg 157a88b5ba8SSam Ravnborg regs = prop->value; 158a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 159a88b5ba8SSam Ravnborg dp->name, 160a88b5ba8SSam Ravnborg regs->which_io, 161a88b5ba8SSam Ravnborg regs->phys_addr); 162a88b5ba8SSam Ravnborg } 163a88b5ba8SSam Ravnborg 164a88b5ba8SSam Ravnborg /* "name@devnum[,func]" */ 165a88b5ba8SSam Ravnborg static void __init pci_path_component(struct device_node *dp, char *tmp_buf) 166a88b5ba8SSam Ravnborg { 167a88b5ba8SSam Ravnborg struct linux_prom_pci_registers *regs; 168a88b5ba8SSam Ravnborg struct property *prop; 169a88b5ba8SSam Ravnborg unsigned int devfn; 170a88b5ba8SSam Ravnborg 171a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 172a88b5ba8SSam Ravnborg if (!prop) 173a88b5ba8SSam Ravnborg return; 174a88b5ba8SSam Ravnborg 175a88b5ba8SSam Ravnborg regs = prop->value; 176a88b5ba8SSam Ravnborg devfn = (regs->phys_hi >> 8) & 0xff; 177a88b5ba8SSam Ravnborg if (devfn & 0x07) { 178a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 179a88b5ba8SSam Ravnborg dp->name, 180a88b5ba8SSam Ravnborg devfn >> 3, 181a88b5ba8SSam Ravnborg devfn & 0x07); 182a88b5ba8SSam Ravnborg } else { 183a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x", 184a88b5ba8SSam Ravnborg dp->name, 185a88b5ba8SSam Ravnborg devfn >> 3); 186a88b5ba8SSam Ravnborg } 187a88b5ba8SSam Ravnborg } 188a88b5ba8SSam Ravnborg 189a88b5ba8SSam Ravnborg /* "name@UPA_PORTID,offset" */ 190a88b5ba8SSam Ravnborg static void __init upa_path_component(struct device_node *dp, char *tmp_buf) 191a88b5ba8SSam Ravnborg { 192a88b5ba8SSam Ravnborg struct linux_prom64_registers *regs; 193a88b5ba8SSam Ravnborg struct property *prop; 194a88b5ba8SSam Ravnborg 195a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 196a88b5ba8SSam Ravnborg if (!prop) 197a88b5ba8SSam Ravnborg return; 198a88b5ba8SSam Ravnborg 199a88b5ba8SSam Ravnborg regs = prop->value; 200a88b5ba8SSam Ravnborg 201a88b5ba8SSam Ravnborg prop = of_find_property(dp, "upa-portid", NULL); 202a88b5ba8SSam Ravnborg if (!prop) 203a88b5ba8SSam Ravnborg return; 204a88b5ba8SSam Ravnborg 205a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 206a88b5ba8SSam Ravnborg dp->name, 207a88b5ba8SSam Ravnborg *(u32 *) prop->value, 208a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr & 0xffffffffUL)); 209a88b5ba8SSam Ravnborg } 210a88b5ba8SSam Ravnborg 211a88b5ba8SSam Ravnborg /* "name@reg" */ 212a88b5ba8SSam Ravnborg static void __init vdev_path_component(struct device_node *dp, char *tmp_buf) 213a88b5ba8SSam Ravnborg { 214a88b5ba8SSam Ravnborg struct property *prop; 215a88b5ba8SSam Ravnborg u32 *regs; 216a88b5ba8SSam Ravnborg 217a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 218a88b5ba8SSam Ravnborg if (!prop) 219a88b5ba8SSam Ravnborg return; 220a88b5ba8SSam Ravnborg 221a88b5ba8SSam Ravnborg regs = prop->value; 222a88b5ba8SSam Ravnborg 223a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x", dp->name, *regs); 224a88b5ba8SSam Ravnborg } 225a88b5ba8SSam Ravnborg 226a88b5ba8SSam Ravnborg /* "name@addrhi,addrlo" */ 227a88b5ba8SSam Ravnborg static void __init ebus_path_component(struct device_node *dp, char *tmp_buf) 228a88b5ba8SSam Ravnborg { 229a88b5ba8SSam Ravnborg struct linux_prom64_registers *regs; 230a88b5ba8SSam Ravnborg struct property *prop; 231a88b5ba8SSam Ravnborg 232a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 233a88b5ba8SSam Ravnborg if (!prop) 234a88b5ba8SSam Ravnborg return; 235a88b5ba8SSam Ravnborg 236a88b5ba8SSam Ravnborg regs = prop->value; 237a88b5ba8SSam Ravnborg 238a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 239a88b5ba8SSam Ravnborg dp->name, 240a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr >> 32UL), 241a88b5ba8SSam Ravnborg (unsigned int) (regs->phys_addr & 0xffffffffUL)); 242a88b5ba8SSam Ravnborg } 243a88b5ba8SSam Ravnborg 244a88b5ba8SSam Ravnborg /* "name@bus,addr" */ 245a88b5ba8SSam Ravnborg static void __init i2c_path_component(struct device_node *dp, char *tmp_buf) 246a88b5ba8SSam Ravnborg { 247a88b5ba8SSam Ravnborg struct property *prop; 248a88b5ba8SSam Ravnborg u32 *regs; 249a88b5ba8SSam Ravnborg 250a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 251a88b5ba8SSam Ravnborg if (!prop) 252a88b5ba8SSam Ravnborg return; 253a88b5ba8SSam Ravnborg 254a88b5ba8SSam Ravnborg regs = prop->value; 255a88b5ba8SSam Ravnborg 256a88b5ba8SSam Ravnborg /* This actually isn't right... should look at the #address-cells 257a88b5ba8SSam Ravnborg * property of the i2c bus node etc. etc. 258a88b5ba8SSam Ravnborg */ 259a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 260a88b5ba8SSam Ravnborg dp->name, regs[0], regs[1]); 261a88b5ba8SSam Ravnborg } 262a88b5ba8SSam Ravnborg 263a88b5ba8SSam Ravnborg /* "name@reg0[,reg1]" */ 264a88b5ba8SSam Ravnborg static void __init usb_path_component(struct device_node *dp, char *tmp_buf) 265a88b5ba8SSam Ravnborg { 266a88b5ba8SSam Ravnborg struct property *prop; 267a88b5ba8SSam Ravnborg u32 *regs; 268a88b5ba8SSam Ravnborg 269a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 270a88b5ba8SSam Ravnborg if (!prop) 271a88b5ba8SSam Ravnborg return; 272a88b5ba8SSam Ravnborg 273a88b5ba8SSam Ravnborg regs = prop->value; 274a88b5ba8SSam Ravnborg 275a88b5ba8SSam Ravnborg if (prop->length == sizeof(u32) || regs[1] == 1) { 276a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x", 277a88b5ba8SSam Ravnborg dp->name, regs[0]); 278a88b5ba8SSam Ravnborg } else { 279a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%x,%x", 280a88b5ba8SSam Ravnborg dp->name, regs[0], regs[1]); 281a88b5ba8SSam Ravnborg } 282a88b5ba8SSam Ravnborg } 283a88b5ba8SSam Ravnborg 284a88b5ba8SSam Ravnborg /* "name@reg0reg1[,reg2reg3]" */ 285a88b5ba8SSam Ravnborg static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf) 286a88b5ba8SSam Ravnborg { 287a88b5ba8SSam Ravnborg struct property *prop; 288a88b5ba8SSam Ravnborg u32 *regs; 289a88b5ba8SSam Ravnborg 290a88b5ba8SSam Ravnborg prop = of_find_property(dp, "reg", NULL); 291a88b5ba8SSam Ravnborg if (!prop) 292a88b5ba8SSam Ravnborg return; 293a88b5ba8SSam Ravnborg 294a88b5ba8SSam Ravnborg regs = prop->value; 295a88b5ba8SSam Ravnborg 296a88b5ba8SSam Ravnborg if (regs[2] || regs[3]) { 297a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%08x%08x,%04x%08x", 298a88b5ba8SSam Ravnborg dp->name, regs[0], regs[1], regs[2], regs[3]); 299a88b5ba8SSam Ravnborg } else { 300a88b5ba8SSam Ravnborg sprintf(tmp_buf, "%s@%08x%08x", 301a88b5ba8SSam Ravnborg dp->name, regs[0], regs[1]); 302a88b5ba8SSam Ravnborg } 303a88b5ba8SSam Ravnborg } 304a88b5ba8SSam Ravnborg 305a88b5ba8SSam Ravnborg static void __init __build_path_component(struct device_node *dp, char *tmp_buf) 306a88b5ba8SSam Ravnborg { 307a88b5ba8SSam Ravnborg struct device_node *parent = dp->parent; 308a88b5ba8SSam Ravnborg 309a88b5ba8SSam Ravnborg if (parent != NULL) { 310a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "pci") || 311a88b5ba8SSam Ravnborg !strcmp(parent->type, "pciex")) { 312a88b5ba8SSam Ravnborg pci_path_component(dp, tmp_buf); 313a88b5ba8SSam Ravnborg return; 314a88b5ba8SSam Ravnborg } 315a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "sbus")) { 316a88b5ba8SSam Ravnborg sbus_path_component(dp, tmp_buf); 317a88b5ba8SSam Ravnborg return; 318a88b5ba8SSam Ravnborg } 319a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "upa")) { 320a88b5ba8SSam Ravnborg upa_path_component(dp, tmp_buf); 321a88b5ba8SSam Ravnborg return; 322a88b5ba8SSam Ravnborg } 323a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "ebus")) { 324a88b5ba8SSam Ravnborg ebus_path_component(dp, tmp_buf); 325a88b5ba8SSam Ravnborg return; 326a88b5ba8SSam Ravnborg } 327a88b5ba8SSam Ravnborg if (!strcmp(parent->name, "usb") || 328a88b5ba8SSam Ravnborg !strcmp(parent->name, "hub")) { 329a88b5ba8SSam Ravnborg usb_path_component(dp, tmp_buf); 330a88b5ba8SSam Ravnborg return; 331a88b5ba8SSam Ravnborg } 332a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "i2c")) { 333a88b5ba8SSam Ravnborg i2c_path_component(dp, tmp_buf); 334a88b5ba8SSam Ravnborg return; 335a88b5ba8SSam Ravnborg } 336a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "firewire")) { 337a88b5ba8SSam Ravnborg ieee1394_path_component(dp, tmp_buf); 338a88b5ba8SSam Ravnborg return; 339a88b5ba8SSam Ravnborg } 340a88b5ba8SSam Ravnborg if (!strcmp(parent->type, "virtual-devices")) { 341a88b5ba8SSam Ravnborg vdev_path_component(dp, tmp_buf); 342a88b5ba8SSam Ravnborg return; 343a88b5ba8SSam Ravnborg } 344a88b5ba8SSam Ravnborg /* "isa" is handled with platform naming */ 345a88b5ba8SSam Ravnborg } 346a88b5ba8SSam Ravnborg 347a88b5ba8SSam Ravnborg /* Use platform naming convention. */ 348a88b5ba8SSam Ravnborg if (tlb_type == hypervisor) { 349a88b5ba8SSam Ravnborg sun4v_path_component(dp, tmp_buf); 350a88b5ba8SSam Ravnborg return; 351a88b5ba8SSam Ravnborg } else { 352a88b5ba8SSam Ravnborg sun4u_path_component(dp, tmp_buf); 353a88b5ba8SSam Ravnborg } 354a88b5ba8SSam Ravnborg } 355a88b5ba8SSam Ravnborg 3566524036aSDavid S. Miller char * __init build_path_component(struct device_node *dp) 357a88b5ba8SSam Ravnborg { 358a88b5ba8SSam Ravnborg char tmp_buf[64], *n; 359a88b5ba8SSam Ravnborg 360a88b5ba8SSam Ravnborg tmp_buf[0] = '\0'; 361a88b5ba8SSam Ravnborg __build_path_component(dp, tmp_buf); 362a88b5ba8SSam Ravnborg if (tmp_buf[0] == '\0') 363a88b5ba8SSam Ravnborg strcpy(tmp_buf, dp->name); 364a88b5ba8SSam Ravnborg 365a88b5ba8SSam Ravnborg n = prom_early_alloc(strlen(tmp_buf) + 1); 366a88b5ba8SSam Ravnborg strcpy(n, tmp_buf); 367a88b5ba8SSam Ravnborg 368a88b5ba8SSam Ravnborg return n; 369a88b5ba8SSam Ravnborg } 370a88b5ba8SSam Ravnborg 371a88b5ba8SSam Ravnborg static const char *get_mid_prop(void) 372a88b5ba8SSam Ravnborg { 373a88b5ba8SSam Ravnborg return (tlb_type == spitfire ? "upa-portid" : "portid"); 374a88b5ba8SSam Ravnborg } 375a88b5ba8SSam Ravnborg 376d1cb9d1aSDavid Miller bool arch_find_n_match_cpu_physical_id(struct device_node *cpun, 377d1cb9d1aSDavid Miller int cpu, unsigned int *thread) 378d1cb9d1aSDavid Miller { 379d1cb9d1aSDavid Miller const char *mid_prop = get_mid_prop(); 380d1cb9d1aSDavid Miller int this_cpu_id; 381d1cb9d1aSDavid Miller 382d1cb9d1aSDavid Miller /* On hypervisor based platforms we interrogate the 'reg' 383d1cb9d1aSDavid Miller * property. On everything else we look for a 'upa-portis', 384d1cb9d1aSDavid Miller * 'portid', or 'cpuid' property. 385d1cb9d1aSDavid Miller */ 386d1cb9d1aSDavid Miller 387d1cb9d1aSDavid Miller if (tlb_type == hypervisor) { 388d1cb9d1aSDavid Miller struct property *prop = of_find_property(cpun, "reg", NULL); 389d1cb9d1aSDavid Miller u32 *regs; 390d1cb9d1aSDavid Miller 391d1cb9d1aSDavid Miller if (!prop) { 392d1cb9d1aSDavid Miller pr_warn("CPU node missing reg property\n"); 393d1cb9d1aSDavid Miller return false; 394d1cb9d1aSDavid Miller } 395d1cb9d1aSDavid Miller regs = prop->value; 396d1cb9d1aSDavid Miller this_cpu_id = regs[0] & 0x0fffffff; 397d1cb9d1aSDavid Miller } else { 398d1cb9d1aSDavid Miller this_cpu_id = of_getintprop_default(cpun, mid_prop, -1); 399d1cb9d1aSDavid Miller 400d1cb9d1aSDavid Miller if (this_cpu_id < 0) { 401d1cb9d1aSDavid Miller mid_prop = "cpuid"; 402d1cb9d1aSDavid Miller this_cpu_id = of_getintprop_default(cpun, mid_prop, -1); 403d1cb9d1aSDavid Miller } 404d1cb9d1aSDavid Miller if (this_cpu_id < 0) { 405d1cb9d1aSDavid Miller pr_warn("CPU node missing cpu ID property\n"); 406d1cb9d1aSDavid Miller return false; 407d1cb9d1aSDavid Miller } 408d1cb9d1aSDavid Miller } 409d1cb9d1aSDavid Miller if (this_cpu_id == cpu) { 410d1cb9d1aSDavid Miller if (thread) { 411d1cb9d1aSDavid Miller int proc_id = cpu_data(cpu).proc_id; 412d1cb9d1aSDavid Miller 413d1cb9d1aSDavid Miller /* On sparc64, the cpu thread information is obtained 414d1cb9d1aSDavid Miller * either from OBP or the machine description. We've 415d1cb9d1aSDavid Miller * actually probed this information already long before 416d1cb9d1aSDavid Miller * this interface gets called so instead of interrogating 417d1cb9d1aSDavid Miller * both the OF node and the MDESC again, just use what 418d1cb9d1aSDavid Miller * we discovered already. 419d1cb9d1aSDavid Miller */ 420d1cb9d1aSDavid Miller if (proc_id < 0) 421d1cb9d1aSDavid Miller proc_id = 0; 422d1cb9d1aSDavid Miller *thread = proc_id; 423d1cb9d1aSDavid Miller } 424d1cb9d1aSDavid Miller return true; 425d1cb9d1aSDavid Miller } 426d1cb9d1aSDavid Miller return false; 427d1cb9d1aSDavid Miller } 428d1cb9d1aSDavid Miller 4299bab5414SDavid S. Miller static void *of_iterate_over_cpus(void *(*func)(struct device_node *, int, int), int arg) 430a88b5ba8SSam Ravnborg { 431a88b5ba8SSam Ravnborg struct device_node *dp; 43223dc758eSDavid S. Miller const char *mid_prop; 433a88b5ba8SSam Ravnborg 43423dc758eSDavid S. Miller mid_prop = get_mid_prop(); 435a88b5ba8SSam Ravnborg for_each_node_by_type(dp, "cpu") { 436a88b5ba8SSam Ravnborg int cpuid = of_getintprop_default(dp, mid_prop, -1); 437a88b5ba8SSam Ravnborg const char *this_mid_prop = mid_prop; 4389bab5414SDavid S. Miller void *ret; 439a88b5ba8SSam Ravnborg 440a88b5ba8SSam Ravnborg if (cpuid < 0) { 441a88b5ba8SSam Ravnborg this_mid_prop = "cpuid"; 442a88b5ba8SSam Ravnborg cpuid = of_getintprop_default(dp, this_mid_prop, -1); 4439bab5414SDavid S. Miller } 4449bab5414SDavid S. Miller if (cpuid < 0) { 4459bab5414SDavid S. Miller prom_printf("OF: Serious problem, cpu lacks " 4469bab5414SDavid S. Miller "%s property", this_mid_prop); 4479bab5414SDavid S. Miller prom_halt(); 4489bab5414SDavid S. Miller } 4499bab5414SDavid S. Miller #ifdef CONFIG_SMP 4509bab5414SDavid S. Miller if (cpuid >= NR_CPUS) { 4519bab5414SDavid S. Miller printk(KERN_WARNING "Ignoring CPU %d which is " 4529bab5414SDavid S. Miller ">= NR_CPUS (%d)\n", 4539bab5414SDavid S. Miller cpuid, NR_CPUS); 4549bab5414SDavid S. Miller continue; 4559bab5414SDavid S. Miller } 4569bab5414SDavid S. Miller #endif 4579bab5414SDavid S. Miller ret = func(dp, cpuid, arg); 4589bab5414SDavid S. Miller if (ret) 4599bab5414SDavid S. Miller return ret; 4609bab5414SDavid S. Miller } 4619bab5414SDavid S. Miller return NULL; 4629bab5414SDavid S. Miller } 4639bab5414SDavid S. Miller 4649bab5414SDavid S. Miller static void *check_cpu_node(struct device_node *dp, int cpuid, int id) 4659bab5414SDavid S. Miller { 4669bab5414SDavid S. Miller if (id == cpuid) 4679bab5414SDavid S. Miller return dp; 4689bab5414SDavid S. Miller return NULL; 4699bab5414SDavid S. Miller } 4709bab5414SDavid S. Miller 4719bab5414SDavid S. Miller struct device_node *of_find_node_by_cpuid(int cpuid) 4729bab5414SDavid S. Miller { 4739bab5414SDavid S. Miller return of_iterate_over_cpus(check_cpu_node, cpuid); 4749bab5414SDavid S. Miller } 4759bab5414SDavid S. Miller 4769bab5414SDavid S. Miller static void *record_one_cpu(struct device_node *dp, int cpuid, int arg) 4779bab5414SDavid S. Miller { 4789bab5414SDavid S. Miller ncpus_probed++; 4799bab5414SDavid S. Miller #ifdef CONFIG_SMP 4809bab5414SDavid S. Miller set_cpu_present(cpuid, true); 4819bab5414SDavid S. Miller set_cpu_possible(cpuid, true); 4829bab5414SDavid S. Miller #endif 4839bab5414SDavid S. Miller return NULL; 4849bab5414SDavid S. Miller } 4859bab5414SDavid S. Miller 4869bab5414SDavid S. Miller void __init of_populate_present_mask(void) 4879bab5414SDavid S. Miller { 4889bab5414SDavid S. Miller if (tlb_type == hypervisor) 4899bab5414SDavid S. Miller return; 4909bab5414SDavid S. Miller 4919bab5414SDavid S. Miller ncpus_probed = 0; 4929bab5414SDavid S. Miller of_iterate_over_cpus(record_one_cpu, 0); 4939bab5414SDavid S. Miller } 4949bab5414SDavid S. Miller 4959bab5414SDavid S. Miller static void *fill_in_one_cpu(struct device_node *dp, int cpuid, int arg) 4969bab5414SDavid S. Miller { 4979bab5414SDavid S. Miller struct device_node *portid_parent = NULL; 4989bab5414SDavid S. Miller int portid = -1; 4999bab5414SDavid S. Miller 5009bab5414SDavid S. Miller if (of_find_property(dp, "cpuid", NULL)) { 501a88b5ba8SSam Ravnborg int limit = 2; 502a88b5ba8SSam Ravnborg 503a88b5ba8SSam Ravnborg portid_parent = dp; 504a88b5ba8SSam Ravnborg while (limit--) { 505a88b5ba8SSam Ravnborg portid_parent = portid_parent->parent; 506a88b5ba8SSam Ravnborg if (!portid_parent) 507a88b5ba8SSam Ravnborg break; 508a88b5ba8SSam Ravnborg portid = of_getintprop_default(portid_parent, 509a88b5ba8SSam Ravnborg "portid", -1); 510a88b5ba8SSam Ravnborg if (portid >= 0) 511a88b5ba8SSam Ravnborg break; 512a88b5ba8SSam Ravnborg } 513a88b5ba8SSam Ravnborg } 514a88b5ba8SSam Ravnborg 5159bab5414SDavid S. Miller #ifndef CONFIG_SMP 516a88b5ba8SSam Ravnborg /* On uniprocessor we only want the values for the 517a88b5ba8SSam Ravnborg * real physical cpu the kernel booted onto, however 518a88b5ba8SSam Ravnborg * cpu_data() only has one entry at index 0. 519a88b5ba8SSam Ravnborg */ 520a88b5ba8SSam Ravnborg if (cpuid != real_hard_smp_processor_id()) 5219bab5414SDavid S. Miller return NULL; 522a88b5ba8SSam Ravnborg cpuid = 0; 523a88b5ba8SSam Ravnborg #endif 524a88b5ba8SSam Ravnborg 525a88b5ba8SSam Ravnborg cpu_data(cpuid).clock_tick = 526a88b5ba8SSam Ravnborg of_getintprop_default(dp, "clock-frequency", 0); 527a88b5ba8SSam Ravnborg 528a88b5ba8SSam Ravnborg if (portid_parent) { 529a88b5ba8SSam Ravnborg cpu_data(cpuid).dcache_size = 530a88b5ba8SSam Ravnborg of_getintprop_default(dp, "l1-dcache-size", 531a88b5ba8SSam Ravnborg 16 * 1024); 532a88b5ba8SSam Ravnborg cpu_data(cpuid).dcache_line_size = 533a88b5ba8SSam Ravnborg of_getintprop_default(dp, "l1-dcache-line-size", 534a88b5ba8SSam Ravnborg 32); 535a88b5ba8SSam Ravnborg cpu_data(cpuid).icache_size = 536a88b5ba8SSam Ravnborg of_getintprop_default(dp, "l1-icache-size", 537a88b5ba8SSam Ravnborg 8 * 1024); 538a88b5ba8SSam Ravnborg cpu_data(cpuid).icache_line_size = 539a88b5ba8SSam Ravnborg of_getintprop_default(dp, "l1-icache-line-size", 540a88b5ba8SSam Ravnborg 32); 541a88b5ba8SSam Ravnborg cpu_data(cpuid).ecache_size = 542a88b5ba8SSam Ravnborg of_getintprop_default(dp, "l2-cache-size", 0); 543a88b5ba8SSam Ravnborg cpu_data(cpuid).ecache_line_size = 544a88b5ba8SSam Ravnborg of_getintprop_default(dp, "l2-cache-line-size", 0); 545a88b5ba8SSam Ravnborg if (!cpu_data(cpuid).ecache_size || 546a88b5ba8SSam Ravnborg !cpu_data(cpuid).ecache_line_size) { 547a88b5ba8SSam Ravnborg cpu_data(cpuid).ecache_size = 548a88b5ba8SSam Ravnborg of_getintprop_default(portid_parent, 549a88b5ba8SSam Ravnborg "l2-cache-size", 550a88b5ba8SSam Ravnborg (4 * 1024 * 1024)); 551a88b5ba8SSam Ravnborg cpu_data(cpuid).ecache_line_size = 552a88b5ba8SSam Ravnborg of_getintprop_default(portid_parent, 553a88b5ba8SSam Ravnborg "l2-cache-line-size", 64); 554a88b5ba8SSam Ravnborg } 555a88b5ba8SSam Ravnborg 556a88b5ba8SSam Ravnborg cpu_data(cpuid).core_id = portid + 1; 557a88b5ba8SSam Ravnborg cpu_data(cpuid).proc_id = portid; 558a88b5ba8SSam Ravnborg #ifdef CONFIG_SMP 559a88b5ba8SSam Ravnborg sparc64_multi_core = 1; 560a88b5ba8SSam Ravnborg #endif 561a88b5ba8SSam Ravnborg } else { 562a88b5ba8SSam Ravnborg cpu_data(cpuid).dcache_size = 563a88b5ba8SSam Ravnborg of_getintprop_default(dp, "dcache-size", 16 * 1024); 564a88b5ba8SSam Ravnborg cpu_data(cpuid).dcache_line_size = 565a88b5ba8SSam Ravnborg of_getintprop_default(dp, "dcache-line-size", 32); 566a88b5ba8SSam Ravnborg 567a88b5ba8SSam Ravnborg cpu_data(cpuid).icache_size = 568a88b5ba8SSam Ravnborg of_getintprop_default(dp, "icache-size", 16 * 1024); 569a88b5ba8SSam Ravnborg cpu_data(cpuid).icache_line_size = 570a88b5ba8SSam Ravnborg of_getintprop_default(dp, "icache-line-size", 32); 571a88b5ba8SSam Ravnborg 572a88b5ba8SSam Ravnborg cpu_data(cpuid).ecache_size = 573a88b5ba8SSam Ravnborg of_getintprop_default(dp, "ecache-size", 574a88b5ba8SSam Ravnborg (4 * 1024 * 1024)); 575a88b5ba8SSam Ravnborg cpu_data(cpuid).ecache_line_size = 576a88b5ba8SSam Ravnborg of_getintprop_default(dp, "ecache-line-size", 64); 577a88b5ba8SSam Ravnborg 578a88b5ba8SSam Ravnborg cpu_data(cpuid).core_id = 0; 579a88b5ba8SSam Ravnborg cpu_data(cpuid).proc_id = -1; 580a88b5ba8SSam Ravnborg } 581a88b5ba8SSam Ravnborg 5829bab5414SDavid S. Miller return NULL; 583a88b5ba8SSam Ravnborg } 584a88b5ba8SSam Ravnborg 5859bab5414SDavid S. Miller void __init of_fill_in_cpu_data(void) 5869bab5414SDavid S. Miller { 5879bab5414SDavid S. Miller if (tlb_type == hypervisor) 5889bab5414SDavid S. Miller return; 5899bab5414SDavid S. Miller 5909bab5414SDavid S. Miller of_iterate_over_cpus(fill_in_one_cpu, 0); 5919bab5414SDavid S. Miller 592a88b5ba8SSam Ravnborg smp_fill_in_sib_core_maps(); 593a88b5ba8SSam Ravnborg } 594a88b5ba8SSam Ravnborg 59523dc758eSDavid S. Miller void __init of_console_init(void) 596a88b5ba8SSam Ravnborg { 597a88b5ba8SSam Ravnborg char *msg = "OF stdout device is: %s\n"; 598a88b5ba8SSam Ravnborg struct device_node *dp; 599a88b5ba8SSam Ravnborg const char *type; 600a88b5ba8SSam Ravnborg phandle node; 601a88b5ba8SSam Ravnborg 602a88b5ba8SSam Ravnborg of_console_path = prom_early_alloc(256); 603a88b5ba8SSam Ravnborg if (prom_ihandle2path(prom_stdout, of_console_path, 256) < 0) { 604a88b5ba8SSam Ravnborg prom_printf("Cannot obtain path of stdout.\n"); 605a88b5ba8SSam Ravnborg prom_halt(); 606a88b5ba8SSam Ravnborg } 607a88b5ba8SSam Ravnborg of_console_options = strrchr(of_console_path, ':'); 608a88b5ba8SSam Ravnborg if (of_console_options) { 609a88b5ba8SSam Ravnborg of_console_options++; 610a88b5ba8SSam Ravnborg if (*of_console_options == '\0') 611a88b5ba8SSam Ravnborg of_console_options = NULL; 612a88b5ba8SSam Ravnborg } 613a88b5ba8SSam Ravnborg 614a88b5ba8SSam Ravnborg node = prom_inst2pkg(prom_stdout); 615a88b5ba8SSam Ravnborg if (!node) { 616a88b5ba8SSam Ravnborg prom_printf("Cannot resolve stdout node from " 617a88b5ba8SSam Ravnborg "instance %08x.\n", prom_stdout); 618a88b5ba8SSam Ravnborg prom_halt(); 619a88b5ba8SSam Ravnborg } 620a88b5ba8SSam Ravnborg 621a88b5ba8SSam Ravnborg dp = of_find_node_by_phandle(node); 622a88b5ba8SSam Ravnborg type = of_get_property(dp, "device_type", NULL); 623a88b5ba8SSam Ravnborg if (!type) { 624a88b5ba8SSam Ravnborg prom_printf("Console stdout lacks device_type property.\n"); 625a88b5ba8SSam Ravnborg prom_halt(); 626a88b5ba8SSam Ravnborg } 627a88b5ba8SSam Ravnborg 628a88b5ba8SSam Ravnborg if (strcmp(type, "display") && strcmp(type, "serial")) { 629a88b5ba8SSam Ravnborg prom_printf("Console device_type is neither display " 630a88b5ba8SSam Ravnborg "nor serial.\n"); 631a88b5ba8SSam Ravnborg prom_halt(); 632a88b5ba8SSam Ravnborg } 633a88b5ba8SSam Ravnborg 634a88b5ba8SSam Ravnborg of_console_device = dp; 635a88b5ba8SSam Ravnborg 636a88b5ba8SSam Ravnborg printk(msg, of_console_path); 637a88b5ba8SSam Ravnborg } 638