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 static void __init setup_cmdline(char **cmdline_p) 44 { 45 extern unsigned int boot_args[]; 46 char *p; 47 48 *cmdline_p = command_line; 49 50 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ 51 if (boot_args[0] < 64) 52 return; /* return if called from hpux boot loader */ 53 54 /* Collect stuff passed in from the boot loader */ 55 strscpy(boot_command_line, (char *)__va(boot_args[1]), 56 COMMAND_LINE_SIZE); 57 58 /* autodetect console type (if not done by palo yet) */ 59 p = boot_command_line; 60 if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) { 61 strlcat(p, " console=", COMMAND_LINE_SIZE); 62 if (PAGE0->mem_cons.cl_class == CL_DUPLEX) 63 strlcat(p, "ttyS0", COMMAND_LINE_SIZE); 64 else 65 strlcat(p, "tty0", COMMAND_LINE_SIZE); 66 } 67 68 /* default to use early console */ 69 if (!strstr(p, "earlycon")) 70 strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE); 71 72 #ifdef CONFIG_BLK_DEV_INITRD 73 /* did palo pass us a ramdisk? */ 74 if (boot_args[2] != 0) { 75 initrd_start = (unsigned long)__va(boot_args[2]); 76 initrd_end = (unsigned long)__va(boot_args[3]); 77 } 78 #endif 79 80 strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 81 } 82 83 #ifdef CONFIG_PA11 84 static void __init dma_ops_init(void) 85 { 86 switch (boot_cpu_data.cpu_type) { 87 case pcx: 88 /* 89 * We've got way too many dependencies on 1.1 semantics 90 * to support 1.0 boxes at this point. 91 */ 92 panic( "PA-RISC Linux currently only supports machines that conform to\n" 93 "the PA-RISC 1.1 or 2.0 architecture specification.\n"); 94 95 case pcxl2: 96 pa7300lc_init(); 97 break; 98 default: 99 break; 100 } 101 } 102 #endif 103 104 void __init setup_arch(char **cmdline_p) 105 { 106 #ifdef CONFIG_64BIT 107 extern int parisc_narrow_firmware; 108 #endif 109 unwind_init(); 110 111 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */ 112 113 #ifdef CONFIG_64BIT 114 printk(KERN_INFO "The 64-bit Kernel has started...\n"); 115 #else 116 printk(KERN_INFO "The 32-bit Kernel has started...\n"); 117 #endif 118 119 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ", 120 (int)(PAGE_SIZE / 1024)); 121 #ifdef CONFIG_HUGETLB_PAGE 122 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size", 123 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20)); 124 #else 125 printk(KERN_CONT "disabled"); 126 #endif 127 printk(KERN_CONT ".\n"); 128 129 /* 130 * Check if initial kernel page mappings are sufficient. 131 * panic early if not, else we may access kernel functions 132 * and variables which can't be reached. 133 */ 134 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) 135 panic("KERNEL_INITIAL_ORDER too small!"); 136 137 #ifdef CONFIG_64BIT 138 if(parisc_narrow_firmware) { 139 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n"); 140 } 141 #endif 142 setup_pdc(); 143 setup_cmdline(cmdline_p); 144 collect_boot_cpu_data(); 145 do_memory_inventory(); /* probe for physical memory */ 146 parisc_cache_init(); 147 paging_init(); 148 149 #ifdef CONFIG_CHASSIS_LCD_LED 150 /* initialize the LCD/LED after boot_cpu_data is available ! */ 151 led_init(); /* LCD/LED initialization */ 152 #endif 153 154 #ifdef CONFIG_PA11 155 dma_ops_init(); 156 #endif 157 158 clear_sched_clock_stable(); 159 } 160 161 /* 162 * Display CPU info for all CPUs. 163 */ 164 static void * 165 c_start (struct seq_file *m, loff_t *pos) 166 { 167 /* Looks like the caller will call repeatedly until we return 168 * 0, signaling EOF perhaps. This could be used to sequence 169 * through CPUs for example. Since we print all cpu info in our 170 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 171 * we only allow for one "position". */ 172 return ((long)*pos < 1) ? (void *)1 : NULL; 173 } 174 175 static void * 176 c_next (struct seq_file *m, void *v, loff_t *pos) 177 { 178 ++*pos; 179 return c_start(m, pos); 180 } 181 182 static void 183 c_stop (struct seq_file *m, void *v) 184 { 185 } 186 187 const struct seq_operations cpuinfo_op = { 188 .start = c_start, 189 .next = c_next, 190 .stop = c_stop, 191 .show = show_cpuinfo 192 }; 193 194 static struct resource central_bus = { 195 .name = "Central Bus", 196 .start = F_EXTEND(0xfff80000), 197 .end = F_EXTEND(0xfffaffff), 198 .flags = IORESOURCE_MEM, 199 }; 200 201 static struct resource local_broadcast = { 202 .name = "Local Broadcast", 203 .start = F_EXTEND(0xfffb0000), 204 .end = F_EXTEND(0xfffdffff), 205 .flags = IORESOURCE_MEM, 206 }; 207 208 static struct resource global_broadcast = { 209 .name = "Global Broadcast", 210 .start = F_EXTEND(0xfffe0000), 211 .end = F_EXTEND(0xffffffff), 212 .flags = IORESOURCE_MEM, 213 }; 214 215 static int __init parisc_init_resources(void) 216 { 217 int result; 218 219 result = request_resource(&iomem_resource, ¢ral_bus); 220 if (result < 0) { 221 printk(KERN_ERR 222 "%s: failed to claim %s address space!\n", 223 __FILE__, central_bus.name); 224 return result; 225 } 226 227 result = request_resource(&iomem_resource, &local_broadcast); 228 if (result < 0) { 229 printk(KERN_ERR 230 "%s: failed to claim %s address space!\n", 231 __FILE__, local_broadcast.name); 232 return result; 233 } 234 235 result = request_resource(&iomem_resource, &global_broadcast); 236 if (result < 0) { 237 printk(KERN_ERR 238 "%s: failed to claim %s address space!\n", 239 __FILE__, global_broadcast.name); 240 return result; 241 } 242 243 return 0; 244 } 245 246 static int __init parisc_init(void) 247 { 248 u32 osid = (OS_ID_LINUX << 16); 249 250 parisc_init_resources(); 251 do_device_inventory(); /* probe for hardware */ 252 253 parisc_pdc_chassis_init(); 254 255 /* set up a new led state on systems shipped LED State panel */ 256 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 257 258 /* tell PDC we're Linux. Nevermind failure. */ 259 pdc_stable_write(0x40, &osid, sizeof(osid)); 260 261 /* start with known state */ 262 flush_cache_all_local(); 263 flush_tlb_all_local(NULL); 264 265 processor_init(); 266 #ifdef CONFIG_SMP 267 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 268 num_online_cpus(), num_present_cpus(), 269 #else 270 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 271 #endif 272 boot_cpu_data.cpu_name, 273 boot_cpu_data.cpu_hz / 1000000, 274 boot_cpu_data.cpu_hz % 1000000 ); 275 276 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP) 277 /* Don't serialize TLB flushes if we run on one CPU only. */ 278 if (num_online_cpus() == 1) 279 pa_serialize_tlb_flushes = 0; 280 #endif 281 282 apply_alternatives_all(); 283 parisc_setup_cache_timing(); 284 285 /* These are in a non-obvious order, will fix when we have an iotree */ 286 #if defined(CONFIG_IOSAPIC) 287 iosapic_init(); 288 #endif 289 #if defined(CONFIG_IOMMU_SBA) 290 sba_init(); 291 #endif 292 #if defined(CONFIG_PCI_LBA) 293 lba_init(); 294 #endif 295 296 /* CCIO before any potential subdevices */ 297 #if defined(CONFIG_IOMMU_CCIO) 298 ccio_init(); 299 #endif 300 301 /* 302 * Need to register Asp & Wax before the EISA adapters for the IRQ 303 * regions. EISA must come before PCI to be sure it gets IRQ region 304 * 0. 305 */ 306 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 307 gsc_init(); 308 #endif 309 #ifdef CONFIG_EISA 310 parisc_eisa_init(); 311 #endif 312 313 #if defined(CONFIG_HPPB) 314 hppb_init(); 315 #endif 316 317 #if defined(CONFIG_GSC_DINO) 318 dino_init(); 319 #endif 320 321 #ifdef CONFIG_CHASSIS_LCD_LED 322 register_led_regions(); /* register LED port info in procfs */ 323 #endif 324 325 return 0; 326 } 327 arch_initcall(parisc_init); 328 329 void __init start_parisc(void) 330 { 331 int ret, cpunum; 332 struct pdc_coproc_cfg coproc_cfg; 333 334 /* check QEMU/SeaBIOS marker in PAGE0 */ 335 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0); 336 337 cpunum = smp_processor_id(); 338 339 init_cpu_topology(); 340 341 set_firmware_width_unlocked(); 342 343 ret = pdc_coproc_cfg_unlocked(&coproc_cfg); 344 if (ret >= 0 && coproc_cfg.ccr_functional) { 345 mtctl(coproc_cfg.ccr_functional, 10); 346 347 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 348 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 349 350 asm volatile ("fstd %fr0,8(%sp)"); 351 } else { 352 panic("must have an fpu to boot linux"); 353 } 354 355 early_trap_init(); /* initialize checksum of fault_vector */ 356 357 start_kernel(); 358 // not reached 359 } 360