ia64/xen-unstable

annotate xen/arch/x86/setup.c @ 3914:9a7751095472

bitkeeper revision 1.1236.1.14 (421db08d6LIbanwxXMIaE6u0X5DIbQ)

Move Emacs mode lines to end of files, out of the way.
Signed-off-by: Keir Fraser <keir.fraser@cl.cam.ac.uk>
author kaf24@scramble.cl.cam.ac.uk
date Thu Feb 24 10:46:37 2005 +0000 (2005-02-24)
parents 09ef8bf5a916
children a5931595eca4 3c5d6f364349
rev   line source
kaf24@1452 1
kaf24@1452 2 #include <xen/config.h>
kaf24@1452 3 #include <xen/init.h>
kaf24@1452 4 #include <xen/lib.h>
kaf24@1452 5 #include <xen/sched.h>
kaf24@1452 6 #include <xen/pci.h>
kaf24@1452 7 #include <xen/serial.h>
kaf24@1506 8 #include <xen/softirq.h>
kaf24@1452 9 #include <xen/acpi.h>
kaf24@3338 10 #include <xen/console.h>
kaf24@3338 11 #include <xen/trace.h>
kaf24@3338 12 #include <xen/multiboot.h>
kaf24@1452 13 #include <asm/bitops.h>
kaf24@1452 14 #include <asm/smp.h>
kaf24@1452 15 #include <asm/processor.h>
kaf24@1452 16 #include <asm/mpspec.h>
kaf24@1452 17 #include <asm/apic.h>
kaf24@1452 18 #include <asm/desc.h>
kaf24@1452 19 #include <asm/domain_page.h>
kaf24@3338 20 #include <asm/shadow.h>
kaf24@3344 21 #include <asm/e820.h>
kaf24@3338 22
kaf24@3338 23 /* opt_dom0_mem: Kilobytes of memory allocated to domain 0. */
kaf24@3338 24 static unsigned int opt_dom0_mem = 16000;
kaf24@3338 25 integer_param("dom0_mem", opt_dom0_mem);
kaf24@3338 26
kaf24@3338 27 /*
kaf24@3338 28 * opt_xenheap_megabytes: Size of Xen heap in megabytes, excluding the
kaf24@3338 29 * pfn_info table and allocation bitmap.
kaf24@3338 30 */
kaf24@3338 31 static unsigned int opt_xenheap_megabytes = XENHEAP_DEFAULT_MB;
kaf24@3354 32 #if defined(__x86_64__)
kaf24@3338 33 integer_param("xenheap_megabytes", opt_xenheap_megabytes);
kaf24@3354 34 #endif
kaf24@1452 35
kaf24@3334 36 /* opt_noht: If true, Hyperthreading is ignored. */
kaf24@3334 37 int opt_noht = 0;
kaf24@3334 38 boolean_param("noht", opt_noht);
kaf24@3334 39
kaf24@3334 40 /* opt_noacpi: If true, ACPI tables are not parsed. */
kaf24@3334 41 static int opt_noacpi = 0;
kaf24@3334 42 boolean_param("noacpi", opt_noacpi);
kaf24@3334 43
kaf24@3334 44 /* opt_nosmp: If true, secondary processors are ignored. */
kaf24@3334 45 static int opt_nosmp = 0;
kaf24@3334 46 boolean_param("nosmp", opt_nosmp);
kaf24@3334 47
kaf24@3334 48 /* opt_ignorebiostables: If true, ACPI and MP tables are ignored. */
kaf24@3334 49 /* NB. This flag implies 'nosmp' and 'noacpi'. */
kaf24@3334 50 static int opt_ignorebiostables = 0;
kaf24@3334 51 boolean_param("ignorebiostables", opt_ignorebiostables);
kaf24@3334 52
kaf24@3334 53 /* opt_watchdog: If true, run a watchdog NMI on each processor. */
kaf24@3334 54 static int opt_watchdog = 0;
kaf24@3334 55 boolean_param("watchdog", opt_watchdog);
kaf24@3334 56
kaf24@3594 57 int early_boot = 1;
kaf24@3594 58
kaf24@3338 59 unsigned long xenheap_phys_end;
kaf24@3338 60
kaf24@2298 61 extern void arch_init_memory(void);
kaf24@1589 62 extern void init_IRQ(void);
kaf24@1589 63 extern void trap_init(void);
kaf24@1589 64 extern void time_init(void);
kaf24@1589 65 extern void ac_timer_init(void);
kaf24@1589 66 extern void initialize_keytable();
kaf24@1589 67 extern int do_timer_lists_from_pit;
kaf24@1589 68
kaf24@3774 69 char ignore_irq13; /* set if exception 16 works */
kaf24@1480 70 struct cpuinfo_x86 boot_cpu_data = { 0, 0, 0, 0, -1 };
kaf24@1452 71
kaf24@1670 72 #if defined(__x86_64__)
kaf24@1670 73 unsigned long mmu_cr4_features = X86_CR4_PSE | X86_CR4_PGE | X86_CR4_PAE;
kaf24@1670 74 #else
kaf24@1452 75 unsigned long mmu_cr4_features = X86_CR4_PSE | X86_CR4_PGE;
kaf24@1670 76 #endif
kaf24@1452 77 EXPORT_SYMBOL(mmu_cr4_features);
kaf24@1452 78
kaf24@1452 79 unsigned long wait_init_idle;
kaf24@1452 80
cl349@2919 81 struct exec_domain *idle_task[NR_CPUS] = { &idle0_exec_domain };
kaf24@1452 82
kaf24@3774 83 #ifdef CONFIG_ACPI_INTERPRETER
kaf24@1452 84 int acpi_disabled = 0;
kaf24@1452 85 #else
kaf24@1452 86 int acpi_disabled = 1;
kaf24@1452 87 #endif
kaf24@1452 88 EXPORT_SYMBOL(acpi_disabled);
kaf24@1452 89
kaf24@1452 90 int phys_proc_id[NR_CPUS];
kaf24@1452 91 int logical_proc_id[NR_CPUS];
kaf24@1452 92
kaf24@3623 93 /* Standard macro to see if a specific flag is changeable. */
kaf24@3623 94 static inline int flag_is_changeable_p(unsigned long flag)
kaf24@1452 95 {
kaf24@3623 96 unsigned long f1, f2;
kaf24@1452 97
kaf24@3623 98 asm("pushf\n\t"
kaf24@3623 99 "pushf\n\t"
kaf24@3623 100 "pop %0\n\t"
kaf24@3623 101 "mov %0,%1\n\t"
kaf24@3623 102 "xor %2,%0\n\t"
kaf24@3623 103 "push %0\n\t"
kaf24@3623 104 "popf\n\t"
kaf24@3623 105 "pushf\n\t"
kaf24@3623 106 "pop %0\n\t"
kaf24@3623 107 "popf\n\t"
kaf24@1452 108 : "=&r" (f1), "=&r" (f2)
kaf24@1452 109 : "ir" (flag));
kaf24@1452 110
kaf24@1452 111 return ((f1^f2) & flag) != 0;
kaf24@1452 112 }
kaf24@1452 113
kaf24@1452 114 /* Probe for the CPUID instruction */
kaf24@1452 115 static int __init have_cpuid_p(void)
kaf24@1452 116 {
kaf24@1452 117 return flag_is_changeable_p(X86_EFLAGS_ID);
kaf24@1452 118 }
kaf24@1452 119
kaf24@1452 120 void __init get_cpu_vendor(struct cpuinfo_x86 *c)
kaf24@1452 121 {
kaf24@1452 122 char *v = c->x86_vendor_id;
kaf24@1452 123
kaf24@1452 124 if (!strcmp(v, "GenuineIntel"))
kaf24@1452 125 c->x86_vendor = X86_VENDOR_INTEL;
kaf24@1452 126 else if (!strcmp(v, "AuthenticAMD"))
kaf24@1452 127 c->x86_vendor = X86_VENDOR_AMD;
kaf24@1452 128 else if (!strcmp(v, "CyrixInstead"))
kaf24@1452 129 c->x86_vendor = X86_VENDOR_CYRIX;
kaf24@1452 130 else if (!strcmp(v, "UMC UMC UMC "))
kaf24@1452 131 c->x86_vendor = X86_VENDOR_UMC;
kaf24@1452 132 else if (!strcmp(v, "CentaurHauls"))
kaf24@1452 133 c->x86_vendor = X86_VENDOR_CENTAUR;
kaf24@1452 134 else if (!strcmp(v, "NexGenDriven"))
kaf24@1452 135 c->x86_vendor = X86_VENDOR_NEXGEN;
kaf24@1452 136 else if (!strcmp(v, "RiseRiseRise"))
kaf24@1452 137 c->x86_vendor = X86_VENDOR_RISE;
kaf24@1452 138 else if (!strcmp(v, "GenuineTMx86") ||
kaf24@1452 139 !strcmp(v, "TransmetaCPU"))
kaf24@1452 140 c->x86_vendor = X86_VENDOR_TRANSMETA;
kaf24@1452 141 else
kaf24@1452 142 c->x86_vendor = X86_VENDOR_UNKNOWN;
kaf24@1452 143 }
kaf24@1452 144
kaf24@1452 145 static void __init init_intel(struct cpuinfo_x86 *c)
kaf24@1452 146 {
kaf24@1452 147 /* SEP CPUID bug: Pentium Pro reports SEP but doesn't have it */
kaf24@1452 148 if ( c->x86 == 6 && c->x86_model < 3 && c->x86_mask < 3 )
kaf24@1452 149 clear_bit(X86_FEATURE_SEP, &c->x86_capability);
kaf24@1452 150
kaf24@1452 151 #ifdef CONFIG_SMP
kaf24@1452 152 if ( test_bit(X86_FEATURE_HT, &c->x86_capability) )
kaf24@1452 153 {
kaf24@1452 154 u32 eax, ebx, ecx, edx;
kaf24@1452 155 int initial_apic_id, siblings, cpu = smp_processor_id();
kaf24@1452 156
kaf24@1452 157 cpuid(1, &eax, &ebx, &ecx, &edx);
cl349@2703 158 ht_per_core = siblings = (ebx & 0xff0000) >> 16;
cl349@2703 159
cl349@2703 160 if ( opt_noht )
cl349@2703 161 clear_bit(X86_FEATURE_HT, &c->x86_capability[0]);
cl349@2703 162
kaf24@1452 163 if ( siblings <= 1 )
kaf24@1452 164 {
kaf24@1452 165 printk(KERN_INFO "CPU#%d: Hyper-Threading is disabled\n", cpu);
kaf24@1452 166 }
kaf24@1452 167 else if ( siblings > 2 )
kaf24@1452 168 {
kaf24@1452 169 panic("We don't support more than two logical CPUs per package!");
kaf24@1452 170 }
kaf24@1452 171 else
kaf24@1452 172 {
kaf24@1452 173 initial_apic_id = ebx >> 24 & 0xff;
kaf24@1452 174 phys_proc_id[cpu] = initial_apic_id >> 1;
kaf24@1452 175 logical_proc_id[cpu] = initial_apic_id & 1;
kaf24@1452 176 printk(KERN_INFO "CPU#%d: Physical ID: %d, Logical ID: %d\n",
kaf24@1452 177 cpu, phys_proc_id[cpu], logical_proc_id[cpu]);
kaf24@1452 178 }
kaf24@1452 179 }
kaf24@1452 180 #endif
iap10@3290 181
iap10@3290 182 #ifdef CONFIG_VMX
iap10@3290 183 start_vmx();
iap10@3290 184 #endif
iap10@3290 185
kaf24@1452 186 }
kaf24@1452 187
kaf24@1452 188 static void __init init_amd(struct cpuinfo_x86 *c)
kaf24@1452 189 {
kaf24@1452 190 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
kaf24@1452 191 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
kaf24@1452 192 clear_bit(0*32+31, &c->x86_capability);
kaf24@1452 193
kaf24@1452 194 switch(c->x86)
kaf24@1452 195 {
kaf24@1452 196 case 5:
kaf24@1452 197 panic("AMD K6 is not supported.\n");
kaf24@1452 198 case 6: /* An Athlon/Duron. We can trust the BIOS probably */
kaf24@1452 199 break;
kaf24@1452 200 }
kaf24@1452 201 }
kaf24@1452 202
kaf24@1452 203 /*
kaf24@1452 204 * This does the hard work of actually picking apart the CPU stuff...
kaf24@1452 205 */
kaf24@1452 206 void __init identify_cpu(struct cpuinfo_x86 *c)
kaf24@1452 207 {
kaf24@1452 208 int junk, i, cpu = smp_processor_id();
kaf24@1452 209 u32 xlvl, tfms;
kaf24@1452 210
kaf24@1452 211 phys_proc_id[cpu] = cpu;
kaf24@1452 212 logical_proc_id[cpu] = 0;
kaf24@1452 213
kaf24@1452 214 c->x86_vendor = X86_VENDOR_UNKNOWN;
kaf24@1452 215 c->cpuid_level = -1; /* CPUID not detected */
kaf24@1452 216 c->x86_model = c->x86_mask = 0; /* So far unknown... */
kaf24@1452 217 c->x86_vendor_id[0] = '\0'; /* Unset */
kaf24@1452 218 memset(&c->x86_capability, 0, sizeof c->x86_capability);
kaf24@1452 219
kaf24@1452 220 if ( !have_cpuid_p() )
kaf24@1452 221 panic("Ancient processors not supported\n");
kaf24@1452 222
kaf24@1452 223 /* Get vendor name */
kaf24@1452 224 cpuid(0x00000000, &c->cpuid_level,
kaf24@1452 225 (int *)&c->x86_vendor_id[0],
kaf24@1452 226 (int *)&c->x86_vendor_id[8],
kaf24@1452 227 (int *)&c->x86_vendor_id[4]);
kaf24@1452 228
kaf24@1452 229 get_cpu_vendor(c);
kaf24@1452 230
kaf24@1452 231 if ( c->cpuid_level == 0 )
kaf24@1452 232 panic("Decrepit CPUID not supported\n");
kaf24@1452 233
kaf24@1452 234 cpuid(0x00000001, &tfms, &junk, &junk,
kaf24@1452 235 &c->x86_capability[0]);
kaf24@1452 236 c->x86 = (tfms >> 8) & 15;
kaf24@1452 237 c->x86_model = (tfms >> 4) & 15;
kaf24@1452 238 c->x86_mask = tfms & 15;
kaf24@1452 239
kaf24@1452 240 /* AMD-defined flags: level 0x80000001 */
kaf24@1452 241 xlvl = cpuid_eax(0x80000000);
kaf24@1452 242 if ( (xlvl & 0xffff0000) == 0x80000000 ) {
kaf24@1452 243 if ( xlvl >= 0x80000001 )
kaf24@1452 244 c->x86_capability[1] = cpuid_edx(0x80000001);
kaf24@1452 245 }
kaf24@1452 246
kaf24@1452 247 /* Transmeta-defined flags: level 0x80860001 */
kaf24@1452 248 xlvl = cpuid_eax(0x80860000);
kaf24@1452 249 if ( (xlvl & 0xffff0000) == 0x80860000 ) {
kaf24@1452 250 if ( xlvl >= 0x80860001 )
kaf24@1452 251 c->x86_capability[2] = cpuid_edx(0x80860001);
kaf24@1452 252 }
kaf24@1452 253
kaf24@1452 254 printk("CPU%d: Before vendor init, caps: %08x %08x %08x, vendor = %d\n",
kaf24@1452 255 smp_processor_id(),
kaf24@1452 256 c->x86_capability[0],
kaf24@1452 257 c->x86_capability[1],
kaf24@1452 258 c->x86_capability[2],
kaf24@1452 259 c->x86_vendor);
kaf24@1452 260
kaf24@1452 261 switch ( c->x86_vendor ) {
kaf24@1452 262 case X86_VENDOR_INTEL:
kaf24@1452 263 init_intel(c);
kaf24@1452 264 break;
kaf24@1452 265 case X86_VENDOR_AMD:
kaf24@1452 266 init_amd(c);
kaf24@1452 267 break;
kaf24@1452 268 case X86_VENDOR_UNKNOWN: /* Connectix Virtual PC reports this */
kaf24@1452 269 break;
kaf24@1452 270 case X86_VENDOR_CENTAUR:
kaf24@1452 271 break;
kaf24@1452 272 default:
kaf24@1452 273 printk("Unknown CPU identifier (%d): continuing anyway, "
kaf24@1452 274 "but might fail.\n", c->x86_vendor);
kaf24@1452 275 }
kaf24@1452 276
kaf24@1452 277 printk("CPU caps: %08x %08x %08x %08x\n",
kaf24@1452 278 c->x86_capability[0],
kaf24@1452 279 c->x86_capability[1],
kaf24@1452 280 c->x86_capability[2],
kaf24@1452 281 c->x86_capability[3]);
kaf24@1452 282
kaf24@1452 283 /*
kaf24@1452 284 * On SMP, boot_cpu_data holds the common feature set between
kaf24@1452 285 * all CPUs; so make sure that we indicate which features are
kaf24@1452 286 * common between the CPUs. The first time this routine gets
kaf24@1452 287 * executed, c == &boot_cpu_data.
kaf24@1452 288 */
kaf24@1452 289 if ( c != &boot_cpu_data ) {
kaf24@1452 290 /* AND the already accumulated flags with these */
kaf24@1452 291 for ( i = 0 ; i < NCAPINTS ; i++ )
kaf24@1452 292 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
kaf24@1452 293 }
kaf24@1452 294 }
kaf24@1452 295
kaf24@1452 296
kaf24@1452 297 unsigned long cpu_initialized;
kaf24@1452 298 void __init cpu_init(void)
kaf24@1452 299 {
kaf24@1452 300 int nr = smp_processor_id();
kaf24@3623 301 struct tss_struct *t = &init_tss[nr];
kaf24@1452 302
kaf24@1452 303 if ( test_and_set_bit(nr, &cpu_initialized) )
kaf24@1452 304 panic("CPU#%d already initialized!!!\n", nr);
kaf24@1452 305 printk("Initializing CPU#%d\n", nr);
kaf24@1452 306
kaf24@1452 307 SET_GDT_ENTRIES(current, DEFAULT_GDT_ENTRIES);
kaf24@1452 308 SET_GDT_ADDRESS(current, DEFAULT_GDT_ADDRESS);
kaf24@3677 309 __asm__ __volatile__ ( "lgdt %0" : "=m" (*current->arch.gdt) );
kaf24@3695 310
kaf24@1452 311 /* No nested task. */
kaf24@3623 312 __asm__ __volatile__ ( "pushf ; andw $0xbfff,(%"__OP"sp) ; popf" );
kaf24@1452 313
kaf24@1452 314 /* Ensure FPU gets initialised for each domain. */
kaf24@1452 315 stts();
kaf24@1452 316
kaf24@1452 317 /* Set up and load the per-CPU TSS and LDT. */
kaf24@3623 318 t->bitmap = IOBMP_INVALID_OFFSET;
kaf24@3623 319 memset(t->io_bitmap, ~0, sizeof(t->io_bitmap));
kaf24@3623 320 #if defined(__i386__)
kaf24@1452 321 t->ss0 = __HYPERVISOR_DS;
kaf24@3761 322 t->esp0 = get_stack_bottom();
kaf24@3623 323 #elif defined(__x86_64__)
kaf24@3761 324 t->rsp0 = get_stack_bottom();
kaf24@3623 325 #endif
kaf24@1452 326 set_tss_desc(nr,t);
kaf24@1452 327 load_TR(nr);
kaf24@3623 328 __asm__ __volatile__ ( "lldt %%ax" : : "a" (0) );
kaf24@1452 329
kaf24@1452 330 /* Clear all 6 debug registers. */
kaf24@3623 331 #define CD(register) __asm__ ( "mov %0,%%db" #register : : "r" (0UL) );
kaf24@1452 332 CD(0); CD(1); CD(2); CD(3); /* no db4 and db5 */; CD(6); CD(7);
kaf24@1452 333 #undef CD
kaf24@1452 334
kaf24@1452 335 /* Install correct page table. */
kaf24@3677 336 write_ptbase(current);
kaf24@1452 337
kaf24@1452 338 init_idle_task();
kaf24@1452 339 }
kaf24@1452 340
kaf24@1452 341 static void __init do_initcalls(void)
kaf24@1452 342 {
kaf24@1452 343 initcall_t *call;
kaf24@1452 344 for ( call = &__initcall_start; call < &__initcall_end; call++ )
kaf24@1452 345 (*call)();
kaf24@1452 346 }
kaf24@1452 347
kaf24@1452 348 unsigned long pci_mem_start = 0x10000000;
kaf24@1452 349
kaf24@3338 350 static void __init start_of_day(void)
kaf24@1452 351 {
kaf24@1452 352 unsigned long low_mem_size;
kaf24@1452 353
kaf24@1452 354 #ifdef MEMORY_GUARD
kaf24@1452 355 /* Unmap the first page of CPU0's stack. */
kaf24@1452 356 extern unsigned long cpu0_stack[];
kaf24@3686 357 memguard_guard_stack(cpu0_stack);
kaf24@1452 358 #endif
kaf24@1452 359
kaf24@1505 360 open_softirq(NEW_TLBFLUSH_CLOCK_PERIOD_SOFTIRQ, new_tlbflush_clock_period);
kaf24@1452 361
kaf24@1452 362 if ( opt_watchdog )
kaf24@1452 363 nmi_watchdog = NMI_LOCAL_APIC;
kaf24@1452 364
kaf24@3120 365 sort_exception_tables();
kaf24@3120 366
kaf24@3272 367 arch_do_createdomain(current);
kaf24@3272 368
kaf24@1452 369 /* Tell the PCI layer not to allocate too close to the RAM area.. */
kaf24@1452 370 low_mem_size = ((max_page << PAGE_SHIFT) + 0xfffff) & ~0xfffff;
kaf24@1452 371 if ( low_mem_size > pci_mem_start ) pci_mem_start = low_mem_size;
kaf24@1452 372
kaf24@1452 373 identify_cpu(&boot_cpu_data); /* get CPU type info */
kaf24@1452 374 if ( cpu_has_fxsr ) set_in_cr4(X86_CR4_OSFXSR);
kaf24@1452 375 if ( cpu_has_xmm ) set_in_cr4(X86_CR4_OSXMMEXCPT);
kaf24@1452 376 #ifdef CONFIG_SMP
kaf24@1452 377 if ( opt_ignorebiostables )
kaf24@1452 378 {
kaf24@1452 379 opt_nosmp = 1; /* No SMP without configuration */
kaf24@1452 380 opt_noacpi = 1; /* ACPI will just confuse matters also */
kaf24@1452 381 }
kaf24@1452 382 else
kaf24@1452 383 {
kaf24@1452 384 find_smp_config();
kaf24@1452 385 smp_alloc_memory(); /* trampoline which other CPUs jump at */
kaf24@1452 386 }
kaf24@1452 387 #endif
kaf24@1452 388 paging_init(); /* not much here now, but sets up fixmap */
kaf24@1452 389 if ( !opt_noacpi )
kaf24@1452 390 acpi_boot_init();
kaf24@1452 391 #ifdef CONFIG_SMP
kaf24@1452 392 if ( smp_found_config )
kaf24@1452 393 get_smp_config();
kaf24@1452 394 #endif
kaf24@1452 395 scheduler_init();
kaf24@1497 396 init_IRQ(); /* installs simple interrupt wrappers. Starts HZ clock. */
kaf24@1452 397 trap_init();
kaf24@1452 398 time_init(); /* installs software handler for HZ clock. */
kaf24@1452 399 init_apic_mappings(); /* make APICs addressable in our pagetables. */
kaf24@1452 400
kaf24@2298 401 arch_init_memory();
kaf24@2298 402
kaf24@1452 403 #ifndef CONFIG_SMP
kaf24@1452 404 APIC_init_uniprocessor();
kaf24@1452 405 #else
kaf24@1452 406 if ( opt_nosmp )
kaf24@3774 407 APIC_init_uniprocessor();
kaf24@1452 408 else
kaf24@1452 409 smp_boot_cpus();
kaf24@1452 410 /*
kaf24@1452 411 * Does loads of stuff, including kicking the local
kaf24@1452 412 * APIC, and the IO APIC after other CPUs are booted.
kaf24@1452 413 * Each IRQ is preferably handled by IO-APIC, but
kaf24@1452 414 * fall thru to 8259A if we have to (but slower).
kaf24@1452 415 */
kaf24@1452 416 #endif
kaf24@1452 417
kaf24@1452 418 __sti();
kaf24@1452 419
kaf24@1505 420 initialize_keytable(); /* call back handling for key codes */
kaf24@1452 421
kaf24@1452 422 serial_init_stage2();
kaf24@1452 423
kaf24@1452 424 if ( !cpu_has_apic )
kaf24@1452 425 {
kaf24@1452 426 do_timer_lists_from_pit = 1;
kaf24@1452 427 if ( smp_num_cpus != 1 )
kaf24@1452 428 panic("We need local APICs on SMP machines!");
kaf24@1452 429 }
kaf24@1452 430
kaf24@1452 431 ac_timer_init(); /* init accurate timers */
kaf24@1452 432 init_xen_time(); /* initialise the time */
kaf24@1452 433 schedulers_start(); /* start scheduler for each CPU */
kaf24@1452 434
kaf24@1452 435 check_nmi_watchdog();
kaf24@1452 436
kaf24@1452 437 #ifdef CONFIG_PCI
kaf24@1452 438 pci_init();
kaf24@1452 439 #endif
kaf24@1452 440 do_initcalls();
kaf24@1452 441
kaf24@1452 442 #ifdef CONFIG_SMP
kaf24@1452 443 wait_init_idle = cpu_online_map;
kaf24@1452 444 clear_bit(smp_processor_id(), &wait_init_idle);
kaf24@1452 445 smp_threads_ready = 1;
kaf24@1452 446 smp_commence(); /* Tell other CPUs that state of the world is stable. */
kaf24@2344 447 while ( wait_init_idle != 0 )
kaf24@1452 448 {
kaf24@1452 449 cpu_relax();
kaf24@1452 450 barrier();
kaf24@1452 451 }
kaf24@1452 452 #endif
kaf24@1452 453
kaf24@1452 454 watchdog_on = 1;
kaf24@3630 455 #ifdef __x86_64__ /* x86_32 uses low mappings when building DOM0. */
kaf24@3630 456 zap_low_mappings();
kaf24@3630 457 #endif
kaf24@1452 458 }
kaf24@3338 459
kaf24@3338 460 void __init __start_xen(multiboot_info_t *mbi)
kaf24@3338 461 {
kaf24@3338 462 unsigned char *cmdline;
kaf24@3338 463 module_t *mod = (module_t *)__va(mbi->mods_addr);
kaf24@3338 464 void *heap_start;
kaf24@3354 465 unsigned long firsthole_start, nr_pages;
kaf24@3338 466 unsigned long dom0_memory_start, dom0_memory_end;
kaf24@3338 467 unsigned long initial_images_start, initial_images_end;
kaf24@3344 468 struct e820entry e820_raw[E820MAX];
kaf24@3354 469 int i, e820_raw_nr = 0, bytes = 0;
kaf24@3338 470
kaf24@3338 471 /* Parse the command-line options. */
kaf24@3344 472 if ( (mbi->flags & MBI_CMDLINE) && (mbi->cmdline != 0) )
kaf24@3344 473 cmdline_parse(__va(mbi->cmdline));
kaf24@3338 474
kaf24@3338 475 /* Must do this early -- e.g., spinlocks rely on get_current(). */
kaf24@3340 476 set_current(&idle0_exec_domain);
kaf24@3338 477
kaf24@3338 478 /* We initialise the serial devices very early so we can get debugging. */
kaf24@3338 479 serial_init_stage1();
kaf24@3338 480
kaf24@3338 481 init_console();
kaf24@3338 482
kaf24@3344 483 /* Check that we have at least one Multiboot module. */
kaf24@3344 484 if ( !(mbi->flags & MBI_MODULES) || (mbi->mods_count == 0) )
kaf24@3338 485 {
kaf24@3344 486 printk("FATAL ERROR: Require at least one Multiboot module.\n");
kaf24@3338 487 for ( ; ; ) ;
kaf24@3338 488 }
kaf24@3338 489
kaf24@3338 490 xenheap_phys_end = opt_xenheap_megabytes << 20;
kaf24@3338 491
kaf24@3344 492 if ( mbi->flags & MBI_MEMMAP )
kaf24@3344 493 {
kaf24@3344 494 while ( bytes < mbi->mmap_length )
kaf24@3344 495 {
kaf24@3344 496 memory_map_t *map = __va(mbi->mmap_addr + bytes);
kaf24@3344 497 e820_raw[e820_raw_nr].addr =
kaf24@3344 498 ((u64)map->base_addr_high << 32) | (u64)map->base_addr_low;
kaf24@3344 499 e820_raw[e820_raw_nr].size =
kaf24@3344 500 ((u64)map->length_high << 32) | (u64)map->length_low;
kaf24@3344 501 e820_raw[e820_raw_nr].type =
kaf24@3346 502 (map->type > E820_SHARED_PAGE) ? E820_RESERVED : map->type;
kaf24@3344 503 e820_raw_nr++;
kaf24@3344 504 bytes += map->size + 4;
kaf24@3344 505 }
kaf24@3344 506 }
kaf24@3344 507 else if ( mbi->flags & MBI_MEMLIMITS )
kaf24@3344 508 {
kaf24@3344 509 e820_raw[0].addr = 0;
kaf24@3344 510 e820_raw[0].size = mbi->mem_lower << 10;
kaf24@3344 511 e820_raw[0].type = E820_RAM;
kaf24@3354 512 e820_raw[1].addr = 0x100000;
kaf24@3354 513 e820_raw[1].size = mbi->mem_upper << 10;
kaf24@3354 514 e820_raw[1].type = E820_RAM;
kaf24@3344 515 e820_raw_nr = 2;
kaf24@3344 516 }
kaf24@3344 517 else
kaf24@3344 518 {
kaf24@3344 519 printk("FATAL ERROR: Bootloader provided no memory information.\n");
kaf24@3344 520 for ( ; ; ) ;
kaf24@3344 521 }
kaf24@3344 522
kaf24@3354 523 max_page = init_e820(e820_raw, e820_raw_nr);
kaf24@3338 524
kaf24@3354 525 /* Find the first high-memory RAM hole. */
kaf24@3354 526 for ( i = 0; i < e820.nr_map; i++ )
kaf24@3354 527 if ( (e820.map[i].type == E820_RAM) &&
kaf24@3354 528 (e820.map[i].addr >= 0x100000) )
kaf24@3354 529 break;
kaf24@3354 530 firsthole_start = e820.map[i].addr + e820.map[i].size;
kaf24@3338 531
kaf24@3354 532 /* Relocate the Multiboot modules. */
kaf24@3354 533 initial_images_start = xenheap_phys_end;
kaf24@3338 534 initial_images_end = initial_images_start +
kaf24@3338 535 (mod[mbi->mods_count-1].mod_end - mod[0].mod_start);
kaf24@3354 536 if ( initial_images_end > firsthole_start )
kaf24@3338 537 {
kaf24@3338 538 printk("Not enough memory to stash the DOM0 kernel image.\n");
kaf24@3338 539 for ( ; ; ) ;
kaf24@3338 540 }
kaf24@3354 541 #if defined(__i386__)
kaf24@3338 542 memmove((void *)initial_images_start, /* use low mapping */
kaf24@3338 543 (void *)mod[0].mod_start, /* use low mapping */
kaf24@3338 544 mod[mbi->mods_count-1].mod_end - mod[0].mod_start);
kaf24@3338 545 #elif defined(__x86_64__)
kaf24@3338 546 memmove(__va(initial_images_start),
kaf24@3338 547 __va(mod[0].mod_start),
kaf24@3338 548 mod[mbi->mods_count-1].mod_end - mod[0].mod_start);
kaf24@3338 549 #endif
kaf24@3338 550
kaf24@3354 551 /* Initialise boot-time allocator with all RAM situated after modules. */
kaf24@3354 552 heap_start = memguard_init(&_end);
kaf24@3354 553 heap_start = __va(init_boot_allocator(__pa(heap_start)));
kaf24@3354 554 nr_pages = 0;
kaf24@3354 555 for ( i = 0; i < e820.nr_map; i++ )
kaf24@3354 556 {
kaf24@3354 557 if ( e820.map[i].type != E820_RAM )
kaf24@3354 558 continue;
kaf24@3354 559 nr_pages += e820.map[i].size >> PAGE_SHIFT;
kaf24@3354 560 if ( (e820.map[i].addr + e820.map[i].size) >= initial_images_end )
kaf24@3354 561 init_boot_pages((e820.map[i].addr < initial_images_end) ?
kaf24@3354 562 initial_images_end : e820.map[i].addr,
kaf24@3354 563 e820.map[i].addr + e820.map[i].size);
kaf24@3354 564 }
kaf24@3354 565
kaf24@3354 566 printk("System RAM: %luMB (%lukB)\n",
kaf24@3354 567 nr_pages >> (20 - PAGE_SHIFT),
kaf24@3354 568 nr_pages << (PAGE_SHIFT - 10));
kaf24@3354 569
kaf24@3354 570 /* Allocate an aligned chunk of RAM for DOM0. */
kaf24@3354 571 dom0_memory_start = alloc_boot_pages(opt_dom0_mem << 10, 4UL << 20);
kaf24@3354 572 dom0_memory_end = dom0_memory_start + (opt_dom0_mem << 10);
kaf24@3354 573 if ( dom0_memory_start == 0 )
kaf24@3338 574 {
kaf24@3338 575 printk("Not enough memory for DOM0 memory reservation.\n");
kaf24@3338 576 for ( ; ; ) ;
kaf24@3338 577 }
kaf24@3338 578
kaf24@3354 579 init_frametable();
kaf24@3338 580
kaf24@3354 581 end_boot_allocator();
kaf24@3354 582
kaf24@3338 583 init_xenheap_pages(__pa(heap_start), xenheap_phys_end);
kaf24@3354 584 printk("Xen heap: %luMB (%lukB)\n",
kaf24@3354 585 (xenheap_phys_end-__pa(heap_start)) >> 20,
kaf24@3354 586 (xenheap_phys_end-__pa(heap_start)) >> 10);
kaf24@3338 587
kaf24@3594 588 early_boot = 0;
kaf24@3594 589
kaf24@3338 590 start_of_day();
kaf24@3338 591
kaf24@3338 592 grant_table_init();
kaf24@3338 593
kaf24@3338 594 shadow_mode_init();
kaf24@3338 595
kaf24@3338 596 /* Create initial domain 0. */
kaf24@3338 597 dom0 = do_createdomain(0, 0);
kaf24@3338 598 if ( dom0 == NULL )
kaf24@3338 599 panic("Error creating domain 0\n");
kaf24@3338 600
kaf24@3340 601 set_bit(DF_PRIVILEGED, &dom0->d_flags);
kaf24@3338 602
kaf24@3338 603 /* Grab the DOM0 command line. Skip past the image name. */
kaf24@3338 604 cmdline = (unsigned char *)(mod[0].string ? __va(mod[0].string) : NULL);
kaf24@3338 605 if ( cmdline != NULL )
kaf24@3338 606 {
kaf24@3338 607 while ( *cmdline == ' ' ) cmdline++;
kaf24@3338 608 if ( (cmdline = strchr(cmdline, ' ')) != NULL )
kaf24@3338 609 while ( *cmdline == ' ' ) cmdline++;
kaf24@3338 610 }
kaf24@3338 611
kaf24@3338 612 /*
kaf24@3338 613 * We're going to setup domain0 using the module(s) that we stashed safely
kaf24@3338 614 * above our heap. The second module, if present, is an initrd ramdisk.
kaf24@3338 615 */
kaf24@3338 616 if ( construct_dom0(dom0, dom0_memory_start, dom0_memory_end,
kaf24@3635 617 initial_images_start,
kaf24@3338 618 mod[0].mod_end-mod[0].mod_start,
kaf24@3338 619 (mbi->mods_count == 1) ? 0 :
kaf24@3635 620 initial_images_start +
kaf24@3338 621 (mod[1].mod_start-mod[0].mod_start),
kaf24@3338 622 (mbi->mods_count == 1) ? 0 :
kaf24@3338 623 mod[mbi->mods_count-1].mod_end - mod[1].mod_start,
kaf24@3338 624 cmdline) != 0)
kaf24@3338 625 panic("Could not set up DOM0 guest OS\n");
kaf24@3338 626
kaf24@3338 627 /* The stash space for the initial kernel image can now be freed up. */
kaf24@3354 628 init_domheap_pages(initial_images_start, initial_images_end);
kaf24@3338 629
kaf24@3338 630 scrub_heap_pages();
kaf24@3338 631
kaf24@3338 632 init_trace_bufs();
kaf24@3338 633
kaf24@3338 634 /* Give up the VGA console if DOM0 is configured to grab it. */
kaf24@3338 635 console_endboot(cmdline && strstr(cmdline, "tty0"));
kaf24@3338 636
kaf24@3340 637 domain_unpause_by_systemcontroller(current->domain);
kaf24@3338 638 domain_unpause_by_systemcontroller(dom0);
kaf24@3338 639 startup_cpu_idle_loop();
kaf24@3338 640 }
kaf24@3914 641
kaf24@3914 642 /*
kaf24@3914 643 * Local variables:
kaf24@3914 644 * mode: C
kaf24@3914 645 * c-set-style: "BSD"
kaf24@3914 646 * c-basic-offset: 4
kaf24@3914 647 * tab-width: 4
kaf24@3914 648 * indent-tabs-mode: nil
kaf24@3914 649 */