1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Initial setup-routines for HP 9000 based hardware. 4 * 5 * Copyright (C) 1991, 1992, 1995 Linus Torvalds 6 * Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de> 7 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) 8 * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> 9 * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> 10 * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> 11 * 12 * Initial PA-RISC Version: 04-23-1999 by Helge Deller 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/initrd.h> 17 #include <linux/init.h> 18 #include <linux/console.h> 19 #include <linux/seq_file.h> 20 #define PCI_DEBUG 21 #include <linux/pci.h> 22 #undef PCI_DEBUG 23 #include <linux/proc_fs.h> 24 #include <linux/export.h> 25 #include <linux/sched.h> 26 #include <linux/sched/clock.h> 27 #include <linux/start_kernel.h> 28 29 #include <asm/cacheflush.h> 30 #include <asm/processor.h> 31 #include <asm/sections.h> 32 #include <asm/pdc.h> 33 #include <asm/led.h> 34 #include <asm/machdep.h> /* for pa7300lc_init() proto */ 35 #include <asm/pdc_chassis.h> 36 #include <asm/io.h> 37 #include <asm/setup.h> 38 #include <asm/unwind.h> 39 #include <asm/smp.h> 40 41 static char __initdata command_line[COMMAND_LINE_SIZE]; 42 43 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */ 44 struct proc_dir_entry * proc_runway_root __read_mostly = NULL; 45 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; 46 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; 47 48 void __init setup_cmdline(char **cmdline_p) 49 { 50 extern unsigned int boot_args[]; 51 char *p; 52 53 /* Collect stuff passed in from the boot loader */ 54 55 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ 56 if (boot_args[0] < 64) { 57 /* called from hpux boot loader */ 58 boot_command_line[0] = '\0'; 59 } else { 60 strscpy(boot_command_line, (char *)__va(boot_args[1]), 61 COMMAND_LINE_SIZE); 62 63 /* autodetect console type (if not done by palo yet) */ 64 p = boot_command_line; 65 if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) { 66 strlcat(p, " console=", COMMAND_LINE_SIZE); 67 if (PAGE0->mem_cons.cl_class == CL_DUPLEX) 68 strlcat(p, "ttyS0", COMMAND_LINE_SIZE); 69 else 70 strlcat(p, "tty0", COMMAND_LINE_SIZE); 71 } 72 73 /* default to use early console */ 74 if (!strstr(p, "earlycon")) 75 strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE); 76 77 #ifdef CONFIG_BLK_DEV_INITRD 78 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */ 79 { 80 initrd_start = (unsigned long)__va(boot_args[2]); 81 initrd_end = (unsigned long)__va(boot_args[3]); 82 } 83 #endif 84 } 85 86 strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 87 *cmdline_p = command_line; 88 } 89 90 #ifdef CONFIG_PA11 91 void __init dma_ops_init(void) 92 { 93 switch (boot_cpu_data.cpu_type) { 94 case pcx: 95 /* 96 * We've got way too many dependencies on 1.1 semantics 97 * to support 1.0 boxes at this point. 98 */ 99 panic( "PA-RISC Linux currently only supports machines that conform to\n" 100 "the PA-RISC 1.1 or 2.0 architecture specification.\n"); 101 102 case pcxl2: 103 pa7300lc_init(); 104 break; 105 default: 106 break; 107 } 108 } 109 #endif 110 111 extern void collect_boot_cpu_data(void); 112 113 void __init setup_arch(char **cmdline_p) 114 { 115 #ifdef CONFIG_64BIT 116 extern int parisc_narrow_firmware; 117 #endif 118 unwind_init(); 119 120 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */ 121 122 #ifdef CONFIG_64BIT 123 printk(KERN_INFO "The 64-bit Kernel has started...\n"); 124 #else 125 printk(KERN_INFO "The 32-bit Kernel has started...\n"); 126 #endif 127 128 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ", 129 (int)(PAGE_SIZE / 1024)); 130 #ifdef CONFIG_HUGETLB_PAGE 131 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size", 132 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20)); 133 #else 134 printk(KERN_CONT "disabled"); 135 #endif 136 printk(KERN_CONT ".\n"); 137 138 /* 139 * Check if initial kernel page mappings are sufficient. 140 * panic early if not, else we may access kernel functions 141 * and variables which can't be reached. 142 */ 143 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) 144 panic("KERNEL_INITIAL_ORDER too small!"); 145 146 #ifdef CONFIG_64BIT 147 if(parisc_narrow_firmware) { 148 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n"); 149 } 150 #endif 151 setup_pdc(); 152 setup_cmdline(cmdline_p); 153 collect_boot_cpu_data(); 154 do_memory_inventory(); /* probe for physical memory */ 155 parisc_cache_init(); 156 paging_init(); 157 158 #ifdef CONFIG_CHASSIS_LCD_LED 159 /* initialize the LCD/LED after boot_cpu_data is available ! */ 160 led_init(); /* LCD/LED initialization */ 161 #endif 162 163 #ifdef CONFIG_PA11 164 dma_ops_init(); 165 #endif 166 167 clear_sched_clock_stable(); 168 } 169 170 /* 171 * Display CPU info for all CPUs. 172 * for parisc this is in processor.c 173 */ 174 extern int show_cpuinfo (struct seq_file *m, void *v); 175 176 static void * 177 c_start (struct seq_file *m, loff_t *pos) 178 { 179 /* Looks like the caller will call repeatedly until we return 180 * 0, signaling EOF perhaps. This could be used to sequence 181 * through CPUs for example. Since we print all cpu info in our 182 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 183 * we only allow for one "position". */ 184 return ((long)*pos < 1) ? (void *)1 : NULL; 185 } 186 187 static void * 188 c_next (struct seq_file *m, void *v, loff_t *pos) 189 { 190 ++*pos; 191 return c_start(m, pos); 192 } 193 194 static void 195 c_stop (struct seq_file *m, void *v) 196 { 197 } 198 199 const struct seq_operations cpuinfo_op = { 200 .start = c_start, 201 .next = c_next, 202 .stop = c_stop, 203 .show = show_cpuinfo 204 }; 205 206 static void __init parisc_proc_mkdir(void) 207 { 208 /* 209 ** Can't call proc_mkdir() until after proc_root_init() has been 210 ** called by start_kernel(). In other words, this code can't 211 ** live in arch/.../setup.c because start_parisc() calls 212 ** start_kernel(). 213 */ 214 switch (boot_cpu_data.cpu_type) { 215 case pcxl: 216 case pcxl2: 217 if (NULL == proc_gsc_root) 218 { 219 proc_gsc_root = proc_mkdir("bus/gsc", NULL); 220 } 221 break; 222 case pcxt_: 223 case pcxu: 224 case pcxu_: 225 case pcxw: 226 case pcxw_: 227 case pcxw2: 228 if (NULL == proc_runway_root) 229 { 230 proc_runway_root = proc_mkdir("bus/runway", NULL); 231 } 232 break; 233 case mako: 234 case mako2: 235 if (NULL == proc_mckinley_root) 236 { 237 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 238 } 239 break; 240 default: 241 /* FIXME: this was added to prevent the compiler 242 * complaining about missing pcx, pcxs and pcxt 243 * I'm assuming they have neither gsc nor runway */ 244 break; 245 } 246 } 247 248 static struct resource central_bus = { 249 .name = "Central Bus", 250 .start = F_EXTEND(0xfff80000), 251 .end = F_EXTEND(0xfffaffff), 252 .flags = IORESOURCE_MEM, 253 }; 254 255 static struct resource local_broadcast = { 256 .name = "Local Broadcast", 257 .start = F_EXTEND(0xfffb0000), 258 .end = F_EXTEND(0xfffdffff), 259 .flags = IORESOURCE_MEM, 260 }; 261 262 static struct resource global_broadcast = { 263 .name = "Global Broadcast", 264 .start = F_EXTEND(0xfffe0000), 265 .end = F_EXTEND(0xffffffff), 266 .flags = IORESOURCE_MEM, 267 }; 268 269 static int __init parisc_init_resources(void) 270 { 271 int result; 272 273 result = request_resource(&iomem_resource, ¢ral_bus); 274 if (result < 0) { 275 printk(KERN_ERR 276 "%s: failed to claim %s address space!\n", 277 __FILE__, central_bus.name); 278 return result; 279 } 280 281 result = request_resource(&iomem_resource, &local_broadcast); 282 if (result < 0) { 283 printk(KERN_ERR 284 "%s: failed to claim %s address space!\n", 285 __FILE__, local_broadcast.name); 286 return result; 287 } 288 289 result = request_resource(&iomem_resource, &global_broadcast); 290 if (result < 0) { 291 printk(KERN_ERR 292 "%s: failed to claim %s address space!\n", 293 __FILE__, global_broadcast.name); 294 return result; 295 } 296 297 return 0; 298 } 299 300 extern void gsc_init(void); 301 extern void processor_init(void); 302 extern void ccio_init(void); 303 extern void hppb_init(void); 304 extern void dino_init(void); 305 extern void iosapic_init(void); 306 extern void lba_init(void); 307 extern void sba_init(void); 308 extern void eisa_init(void); 309 310 static int __init parisc_init(void) 311 { 312 u32 osid = (OS_ID_LINUX << 16); 313 314 parisc_proc_mkdir(); 315 parisc_init_resources(); 316 do_device_inventory(); /* probe for hardware */ 317 318 parisc_pdc_chassis_init(); 319 320 /* set up a new led state on systems shipped LED State panel */ 321 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 322 323 /* tell PDC we're Linux. Nevermind failure. */ 324 pdc_stable_write(0x40, &osid, sizeof(osid)); 325 326 /* start with known state */ 327 flush_cache_all_local(); 328 flush_tlb_all_local(NULL); 329 330 processor_init(); 331 #ifdef CONFIG_SMP 332 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 333 num_online_cpus(), num_present_cpus(), 334 #else 335 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 336 #endif 337 boot_cpu_data.cpu_name, 338 boot_cpu_data.cpu_hz / 1000000, 339 boot_cpu_data.cpu_hz % 1000000 ); 340 341 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP) 342 /* Don't serialize TLB flushes if we run on one CPU only. */ 343 if (num_online_cpus() == 1) 344 pa_serialize_tlb_flushes = 0; 345 #endif 346 347 apply_alternatives_all(); 348 parisc_setup_cache_timing(); 349 350 /* These are in a non-obvious order, will fix when we have an iotree */ 351 #if defined(CONFIG_IOSAPIC) 352 iosapic_init(); 353 #endif 354 #if defined(CONFIG_IOMMU_SBA) 355 sba_init(); 356 #endif 357 #if defined(CONFIG_PCI_LBA) 358 lba_init(); 359 #endif 360 361 /* CCIO before any potential subdevices */ 362 #if defined(CONFIG_IOMMU_CCIO) 363 ccio_init(); 364 #endif 365 366 /* 367 * Need to register Asp & Wax before the EISA adapters for the IRQ 368 * regions. EISA must come before PCI to be sure it gets IRQ region 369 * 0. 370 */ 371 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 372 gsc_init(); 373 #endif 374 #ifdef CONFIG_EISA 375 eisa_init(); 376 #endif 377 378 #if defined(CONFIG_HPPB) 379 hppb_init(); 380 #endif 381 382 #if defined(CONFIG_GSC_DINO) 383 dino_init(); 384 #endif 385 386 #ifdef CONFIG_CHASSIS_LCD_LED 387 register_led_regions(); /* register LED port info in procfs */ 388 #endif 389 390 return 0; 391 } 392 arch_initcall(parisc_init); 393 394 void __init start_parisc(void) 395 { 396 extern void early_trap_init(void); 397 398 int ret, cpunum; 399 struct pdc_coproc_cfg coproc_cfg; 400 401 /* check QEMU/SeaBIOS marker in PAGE0 */ 402 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0); 403 404 cpunum = smp_processor_id(); 405 406 init_cpu_topology(); 407 408 set_firmware_width_unlocked(); 409 410 ret = pdc_coproc_cfg_unlocked(&coproc_cfg); 411 if (ret >= 0 && coproc_cfg.ccr_functional) { 412 mtctl(coproc_cfg.ccr_functional, 10); 413 414 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 415 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 416 417 asm volatile ("fstd %fr0,8(%sp)"); 418 } else { 419 panic("must have an fpu to boot linux"); 420 } 421 422 early_trap_init(); /* initialize checksum of fault_vector */ 423 424 start_kernel(); 425 // not reached 426 } 427