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