1/* 2 * Maple (970 eval board) setup code 3 * 4 * (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org), 5 * IBM Corp. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 */ 13 14#undef DEBUG 15 16#include <linux/init.h> 17#include <linux/errno.h> 18#include <linux/sched.h> 19#include <linux/kernel.h> 20#include <linux/mm.h> 21#include <linux/stddef.h> 22#include <linux/unistd.h> 23#include <linux/ptrace.h> 24#include <linux/user.h> 25#include <linux/tty.h> 26#include <linux/string.h> 27#include <linux/delay.h> 28#include <linux/ioport.h> 29#include <linux/major.h> 30#include <linux/initrd.h> 31#include <linux/vt_kern.h> 32#include <linux/console.h> 33#include <linux/pci.h> 34#include <linux/adb.h> 35#include <linux/cuda.h> 36#include <linux/pmu.h> 37#include <linux/irq.h> 38#include <linux/seq_file.h> 39#include <linux/root_dev.h> 40#include <linux/serial.h> 41#include <linux/smp.h> 42#include <linux/bitops.h> 43#include <linux/of_device.h> 44#include <linux/memblock.h> 45 46#include <asm/processor.h> 47#include <asm/sections.h> 48#include <asm/prom.h> 49#include <asm/system.h> 50#include <asm/pgtable.h> 51#include <asm/io.h> 52#include <asm/pci-bridge.h> 53#include <asm/iommu.h> 54#include <asm/machdep.h> 55#include <asm/dma.h> 56#include <asm/cputable.h> 57#include <asm/time.h> 58#include <asm/mpic.h> 59#include <asm/rtas.h> 60#include <asm/udbg.h> 61#include <asm/nvram.h> 62 63#include "maple.h" 64 65#ifdef DEBUG 66#define DBG(fmt...) udbg_printf(fmt) 67#else 68#define DBG(fmt...) 69#endif 70 71static unsigned long maple_find_nvram_base(void) 72{ 73 struct device_node *rtcs; 74 unsigned long result = 0; 75 76 /* find NVRAM device */ 77 rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111"); 78 if (rtcs) { 79 struct resource r; 80 if (of_address_to_resource(rtcs, 0, &r)) { 81 printk(KERN_EMERG "Maple: Unable to translate NVRAM" 82 " address\n"); 83 goto bail; 84 } 85 if (!(r.flags & IORESOURCE_IO)) { 86 printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n"); 87 goto bail; 88 } 89 result = r.start; 90 } else 91 printk(KERN_EMERG "Maple: Unable to find NVRAM\n"); 92 bail: 93 of_node_put(rtcs); 94 return result; 95} 96 97static void maple_restart(char *cmd) 98{ 99 unsigned int maple_nvram_base; 100 const unsigned int *maple_nvram_offset, *maple_nvram_command; 101 struct device_node *sp; 102 103 maple_nvram_base = maple_find_nvram_base(); 104 if (maple_nvram_base == 0) 105 goto fail; 106 107 /* find service processor device */ 108 sp = of_find_node_by_name(NULL, "service-processor"); 109 if (!sp) { 110 printk(KERN_EMERG "Maple: Unable to find Service Processor\n"); 111 goto fail; 112 } 113 maple_nvram_offset = of_get_property(sp, "restart-addr", NULL); 114 maple_nvram_command = of_get_property(sp, "restart-value", NULL); 115 of_node_put(sp); 116 117 /* send command */ 118 outb_p(*maple_nvram_command, maple_nvram_base + *maple_nvram_offset); 119 for (;;) ; 120 fail: 121 printk(KERN_EMERG "Maple: Manual Restart Required\n"); 122} 123 124static void maple_power_off(void) 125{ 126 unsigned int maple_nvram_base; 127 const unsigned int *maple_nvram_offset, *maple_nvram_command; 128 struct device_node *sp; 129 130 maple_nvram_base = maple_find_nvram_base(); 131 if (maple_nvram_base == 0) 132 goto fail; 133 134 /* find service processor device */ 135 sp = of_find_node_by_name(NULL, "service-processor"); 136 if (!sp) { 137 printk(KERN_EMERG "Maple: Unable to find Service Processor\n"); 138 goto fail; 139 } 140 maple_nvram_offset = of_get_property(sp, "power-off-addr", NULL); 141 maple_nvram_command = of_get_property(sp, "power-off-value", NULL); 142 of_node_put(sp); 143 144 /* send command */ 145 outb_p(*maple_nvram_command, maple_nvram_base + *maple_nvram_offset); 146 for (;;) ; 147 fail: 148 printk(KERN_EMERG "Maple: Manual Power-Down Required\n"); 149} 150 151static void maple_halt(void) 152{ 153 maple_power_off(); 154} 155 156#ifdef CONFIG_SMP 157struct smp_ops_t maple_smp_ops = { 158 .probe = smp_mpic_probe, 159 .message_pass = smp_mpic_message_pass, 160 .kick_cpu = smp_generic_kick_cpu, 161 .setup_cpu = smp_mpic_setup_cpu, 162 .give_timebase = smp_generic_give_timebase, 163 .take_timebase = smp_generic_take_timebase, 164}; 165#endif /* CONFIG_SMP */ 166 167static void __init maple_use_rtas_reboot_and_halt_if_present(void) 168{ 169 if (rtas_service_present("system-reboot") && 170 rtas_service_present("power-off")) { 171 ppc_md.restart = rtas_restart; 172 ppc_md.power_off = rtas_power_off; 173 ppc_md.halt = rtas_halt; 174 } 175} 176 177void __init maple_setup_arch(void) 178{ 179 /* init to some ~sane value until calibrate_delay() runs */ 180 loops_per_jiffy = 50000000; 181 182 /* Setup SMP callback */ 183#ifdef CONFIG_SMP 184 smp_ops = &maple_smp_ops; 185#endif 186 /* Lookup PCI hosts */ 187 maple_pci_init(); 188 189#ifdef CONFIG_DUMMY_CONSOLE 190 conswitchp = &dummy_con; 191#endif 192 maple_use_rtas_reboot_and_halt_if_present(); 193 194 printk(KERN_DEBUG "Using native/NAP idle loop\n"); 195 196 mmio_nvram_init(); 197} 198 199/* 200 * Early initialization. 201 */ 202static void __init maple_init_early(void) 203{ 204 DBG(" -> maple_init_early\n"); 205 206 iommu_init_early_dart(); 207 208 DBG(" <- maple_init_early\n"); 209} 210 211/* 212 * This is almost identical to pSeries and CHRP. We need to make that 213 * code generic at one point, with appropriate bits in the device-tree to 214 * identify the presence of an HT APIC 215 */ 216static void __init maple_init_IRQ(void) 217{ 218 struct device_node *root, *np, *mpic_node = NULL; 219 const unsigned int *opprop; 220 unsigned long openpic_addr = 0; 221 int naddr, n, i, opplen, has_isus = 0; 222 struct mpic *mpic; 223 unsigned int flags = MPIC_PRIMARY; 224 225 /* Locate MPIC in the device-tree. Note that there is a bug 226 * in Maple device-tree where the type of the controller is 227 * open-pic and not interrupt-controller 228 */ 229 230 for_each_node_by_type(np, "interrupt-controller") 231 if (of_device_is_compatible(np, "open-pic")) { 232 mpic_node = np; 233 break; 234 } 235 if (mpic_node == NULL) 236 for_each_node_by_type(np, "open-pic") { 237 mpic_node = np; 238 break; 239 } 240 if (mpic_node == NULL) { 241 printk(KERN_ERR 242 "Failed to locate the MPIC interrupt controller\n"); 243 return; 244 } 245 246 /* Find address list in /platform-open-pic */ 247 root = of_find_node_by_path("/"); 248 naddr = of_n_addr_cells(root); 249 opprop = of_get_property(root, "platform-open-pic", &opplen); 250 if (opprop != 0) { 251 openpic_addr = of_read_number(opprop, naddr); 252 has_isus = (opplen > naddr); 253 printk(KERN_DEBUG "OpenPIC addr: %lx, has ISUs: %d\n", 254 openpic_addr, has_isus); 255 } 256 257 BUG_ON(openpic_addr == 0); 258 259 /* Check for a big endian MPIC */ 260 if (of_get_property(np, "big-endian", NULL) != NULL) 261 flags |= MPIC_BIG_ENDIAN; 262 263 flags |= MPIC_U3_HT_IRQS | MPIC_WANTS_RESET; 264 /* All U3/U4 are big-endian, older SLOF firmware doesn't encode this */ 265 flags |= MPIC_BIG_ENDIAN; 266 267 /* Setup the openpic driver. More device-tree junks, we hard code no 268 * ISUs for now. I'll have to revisit some stuffs with the folks doing 269 * the firmware for those 270 */ 271 mpic = mpic_alloc(mpic_node, openpic_addr, flags, 272 /*has_isus ? 16 :*/ 0, 0, " MPIC "); 273 BUG_ON(mpic == NULL); 274 275 /* Add ISUs */ 276 opplen /= sizeof(u32); 277 for (n = 0, i = naddr; i < opplen; i += naddr, n++) { 278 unsigned long isuaddr = of_read_number(opprop + i, naddr); 279 mpic_assign_isu(mpic, n, isuaddr); 280 } 281 282 /* All ISUs are setup, complete initialization */ 283 mpic_init(mpic); 284 ppc_md.get_irq = mpic_get_irq; 285 of_node_put(mpic_node); 286 of_node_put(root); 287} 288 289static void __init maple_progress(char *s, unsigned short hex) 290{ 291 printk("*** %04x : %s\n", hex, s ? s : ""); 292} 293 294 295/* 296 * Called very early, MMU is off, device-tree isn't unflattened 297 */ 298static int __init maple_probe(void) 299{ 300 unsigned long root = of_get_flat_dt_root(); 301 302 if (!of_flat_dt_is_compatible(root, "Momentum,Maple") && 303 !of_flat_dt_is_compatible(root, "Momentum,Apache")) 304 return 0; 305 /* 306 * On U3, the DART (iommu) must be allocated now since it 307 * has an impact on htab_initialize (due to the large page it 308 * occupies having to be broken up so the DART itself is not 309 * part of the cacheable linar mapping 310 */ 311 alloc_dart_table(); 312 313 hpte_init_native(); 314 315 return 1; 316} 317 318define_machine(maple) { 319 .name = "Maple", 320 .probe = maple_probe, 321 .setup_arch = maple_setup_arch, 322 .init_early = maple_init_early, 323 .init_IRQ = maple_init_IRQ, 324 .pci_irq_fixup = maple_pci_irq_fixup, 325 .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq, 326 .restart = maple_restart, 327 .power_off = maple_power_off, 328 .halt = maple_halt, 329 .get_boot_time = maple_get_boot_time, 330 .set_rtc_time = maple_set_rtc_time, 331 .get_rtc_time = maple_get_rtc_time, 332 .calibrate_decr = generic_calibrate_decr, 333 .progress = maple_progress, 334 .power_save = power4_idle, 335}; 336 337#ifdef CONFIG_EDAC 338/* 339 * Register a platform device for CPC925 memory controller on 340 * Motorola ATCA-6101 blade. 341 */ 342#define MAPLE_CPC925_MODEL "Motorola,ATCA-6101" 343static int __init maple_cpc925_edac_setup(void) 344{ 345 struct platform_device *pdev; 346 struct device_node *np = NULL; 347 struct resource r; 348 const unsigned char *model; 349 int ret; 350 351 np = of_find_node_by_path("/"); 352 if (!np) { 353 printk(KERN_ERR "%s: Unable to get root node\n", __func__); 354 return -ENODEV; 355 } 356 357 model = (const unsigned char *)of_get_property(np, "model", NULL); 358 if (!model) { 359 printk(KERN_ERR "%s: Unabel to get model info\n", __func__); 360 return -ENODEV; 361 } 362 363 ret = strcmp(model, MAPLE_CPC925_MODEL); 364 of_node_put(np); 365 366 if (ret != 0) 367 return 0; 368 369 np = of_find_node_by_type(NULL, "memory-controller"); 370 if (!np) { 371 printk(KERN_ERR "%s: Unable to find memory-controller node\n", 372 __func__); 373 return -ENODEV; 374 } 375 376 ret = of_address_to_resource(np, 0, &r); 377 of_node_put(np); 378 379 if (ret < 0) { 380 printk(KERN_ERR "%s: Unable to get memory-controller reg\n", 381 __func__); 382 return -ENODEV; 383 } 384 385 pdev = platform_device_register_simple("cpc925_edac", 0, &r, 1); 386 if (IS_ERR(pdev)) 387 return PTR_ERR(pdev); 388 389 printk(KERN_INFO "%s: CPC925 platform device created\n", __func__); 390 391 return 0; 392} 393machine_device_initcall(maple, maple_cpc925_edac_setup); 394#endif 395