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