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 clear_sched_clock_stable(); 155 } 156 157 /* 158 * Display CPU info for all CPUs. 159 * for parisc this is in processor.c 160 */ 161 extern int show_cpuinfo (struct seq_file *m, void *v); 162 163 static void * 164 c_start (struct seq_file *m, loff_t *pos) 165 { 166 /* Looks like the caller will call repeatedly until we return 167 * 0, signaling EOF perhaps. This could be used to sequence 168 * through CPUs for example. Since we print all cpu info in our 169 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 170 * we only allow for one "position". */ 171 return ((long)*pos < 1) ? (void *)1 : NULL; 172 } 173 174 static void * 175 c_next (struct seq_file *m, void *v, loff_t *pos) 176 { 177 ++*pos; 178 return c_start(m, pos); 179 } 180 181 static void 182 c_stop (struct seq_file *m, void *v) 183 { 184 } 185 186 const struct seq_operations cpuinfo_op = { 187 .start = c_start, 188 .next = c_next, 189 .stop = c_stop, 190 .show = show_cpuinfo 191 }; 192 193 static void __init parisc_proc_mkdir(void) 194 { 195 /* 196 ** Can't call proc_mkdir() until after proc_root_init() has been 197 ** called by start_kernel(). In other words, this code can't 198 ** live in arch/.../setup.c because start_parisc() calls 199 ** start_kernel(). 200 */ 201 switch (boot_cpu_data.cpu_type) { 202 case pcxl: 203 case pcxl2: 204 if (NULL == proc_gsc_root) 205 { 206 proc_gsc_root = proc_mkdir("bus/gsc", NULL); 207 } 208 break; 209 case pcxt_: 210 case pcxu: 211 case pcxu_: 212 case pcxw: 213 case pcxw_: 214 case pcxw2: 215 if (NULL == proc_runway_root) 216 { 217 proc_runway_root = proc_mkdir("bus/runway", NULL); 218 } 219 break; 220 case mako: 221 case mako2: 222 if (NULL == proc_mckinley_root) 223 { 224 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 225 } 226 break; 227 default: 228 /* FIXME: this was added to prevent the compiler 229 * complaining about missing pcx, pcxs and pcxt 230 * I'm assuming they have neither gsc nor runway */ 231 break; 232 } 233 } 234 235 static struct resource central_bus = { 236 .name = "Central Bus", 237 .start = F_EXTEND(0xfff80000), 238 .end = F_EXTEND(0xfffaffff), 239 .flags = IORESOURCE_MEM, 240 }; 241 242 static struct resource local_broadcast = { 243 .name = "Local Broadcast", 244 .start = F_EXTEND(0xfffb0000), 245 .end = F_EXTEND(0xfffdffff), 246 .flags = IORESOURCE_MEM, 247 }; 248 249 static struct resource global_broadcast = { 250 .name = "Global Broadcast", 251 .start = F_EXTEND(0xfffe0000), 252 .end = F_EXTEND(0xffffffff), 253 .flags = IORESOURCE_MEM, 254 }; 255 256 static int __init parisc_init_resources(void) 257 { 258 int result; 259 260 result = request_resource(&iomem_resource, ¢ral_bus); 261 if (result < 0) { 262 printk(KERN_ERR 263 "%s: failed to claim %s address space!\n", 264 __FILE__, central_bus.name); 265 return result; 266 } 267 268 result = request_resource(&iomem_resource, &local_broadcast); 269 if (result < 0) { 270 printk(KERN_ERR 271 "%s: failed to claim %s address space!\n", 272 __FILE__, local_broadcast.name); 273 return result; 274 } 275 276 result = request_resource(&iomem_resource, &global_broadcast); 277 if (result < 0) { 278 printk(KERN_ERR 279 "%s: failed to claim %s address space!\n", 280 __FILE__, global_broadcast.name); 281 return result; 282 } 283 284 return 0; 285 } 286 287 extern void gsc_init(void); 288 extern void processor_init(void); 289 extern void ccio_init(void); 290 extern void hppb_init(void); 291 extern void dino_init(void); 292 extern void iosapic_init(void); 293 extern void lba_init(void); 294 extern void sba_init(void); 295 extern void eisa_init(void); 296 297 static int __init parisc_init(void) 298 { 299 u32 osid = (OS_ID_LINUX << 16); 300 301 parisc_proc_mkdir(); 302 parisc_init_resources(); 303 do_device_inventory(); /* probe for hardware */ 304 305 parisc_pdc_chassis_init(); 306 307 /* set up a new led state on systems shipped LED State panel */ 308 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 309 310 /* tell PDC we're Linux. Nevermind failure. */ 311 pdc_stable_write(0x40, &osid, sizeof(osid)); 312 313 /* start with known state */ 314 flush_cache_all_local(); 315 flush_tlb_all_local(NULL); 316 317 processor_init(); 318 #ifdef CONFIG_SMP 319 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 320 num_online_cpus(), num_present_cpus(), 321 #else 322 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 323 #endif 324 boot_cpu_data.cpu_name, 325 boot_cpu_data.cpu_hz / 1000000, 326 boot_cpu_data.cpu_hz % 1000000 ); 327 328 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP) 329 /* Don't serialize TLB flushes if we run on one CPU only. */ 330 if (num_online_cpus() == 1) 331 pa_serialize_tlb_flushes = 0; 332 #endif 333 334 apply_alternatives_all(); 335 parisc_setup_cache_timing(); 336 337 /* These are in a non-obvious order, will fix when we have an iotree */ 338 #if defined(CONFIG_IOSAPIC) 339 iosapic_init(); 340 #endif 341 #if defined(CONFIG_IOMMU_SBA) 342 sba_init(); 343 #endif 344 #if defined(CONFIG_PCI_LBA) 345 lba_init(); 346 #endif 347 348 /* CCIO before any potential subdevices */ 349 #if defined(CONFIG_IOMMU_CCIO) 350 ccio_init(); 351 #endif 352 353 /* 354 * Need to register Asp & Wax before the EISA adapters for the IRQ 355 * regions. EISA must come before PCI to be sure it gets IRQ region 356 * 0. 357 */ 358 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 359 gsc_init(); 360 #endif 361 #ifdef CONFIG_EISA 362 eisa_init(); 363 #endif 364 365 #if defined(CONFIG_HPPB) 366 hppb_init(); 367 #endif 368 369 #if defined(CONFIG_GSC_DINO) 370 dino_init(); 371 #endif 372 373 #ifdef CONFIG_CHASSIS_LCD_LED 374 register_led_regions(); /* register LED port info in procfs */ 375 #endif 376 377 return 0; 378 } 379 arch_initcall(parisc_init); 380 381 void __init start_parisc(void) 382 { 383 extern void early_trap_init(void); 384 385 int ret, cpunum; 386 struct pdc_coproc_cfg coproc_cfg; 387 388 /* check QEMU/SeaBIOS marker in PAGE0 */ 389 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0); 390 391 cpunum = smp_processor_id(); 392 393 init_cpu_topology(); 394 395 set_firmware_width_unlocked(); 396 397 ret = pdc_coproc_cfg_unlocked(&coproc_cfg); 398 if (ret >= 0 && coproc_cfg.ccr_functional) { 399 mtctl(coproc_cfg.ccr_functional, 10); 400 401 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 402 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 403 404 asm volatile ("fstd %fr0,8(%sp)"); 405 } else { 406 panic("must have an fpu to boot linux"); 407 } 408 409 early_trap_init(); /* initialize checksum of fault_vector */ 410 411 start_kernel(); 412 // not reached 413 } 414