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