2 * Architecture-specific setup.
4 * Copyright (C) 1998-2001, 2003-2004 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Stephane Eranian <eranian@hpl.hp.com>
7 * Copyright (C) 2000, 2004 Intel Corp
8 * Rohit Seth <rohit.seth@intel.com>
9 * Suresh Siddha <suresh.b.siddha@intel.com>
10 * Gordon Jin <gordon.jin@intel.com>
11 * Copyright (C) 1999 VA Linux Systems
12 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
14 * 12/26/04 S.Siddha, G.Jin, R.Seth
15 * Add multi-threading and multi-core detection
16 * 11/12/01 D.Mosberger Convert get_cpuinfo() to seq_file based show_cpuinfo().
17 * 04/04/00 D.Mosberger renamed cpu_initialized to cpu_online_map
18 * 03/31/00 R.Seth cpu_initialized and current->processor fixes
19 * 02/04/00 D.Mosberger some more get_cpuinfo fixes...
20 * 02/01/00 R.Seth fixed get_cpuinfo for SMP
21 * 01/07/99 S.Eranian added the support for command line argument
22 * 06/24/99 W.Drummond added boot_cpu_data.
23 * 05/28/05 Z. Menyhart Dynamic stride size for "flush_icache_range()"
25 #include <linux/module.h>
26 #include <linux/init.h>
28 #include <linux/acpi.h>
29 #include <linux/bootmem.h>
30 #include <linux/console.h>
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <linux/reboot.h>
34 #include <linux/sched.h>
35 #include <linux/seq_file.h>
36 #include <linux/string.h>
37 #include <linux/threads.h>
38 #include <linux/screen_info.h>
39 #include <linux/dmi.h>
40 #include <linux/serial.h>
41 #include <linux/serial_core.h>
42 #include <linux/efi.h>
43 #include <linux/initrd.h>
45 #include <linux/cpufreq.h>
46 #include <linux/kexec.h>
47 #include <linux/crash_dump.h>
50 #include <asm/machvec.h>
52 #include <asm/meminit.h>
54 #include <asm/patch.h>
55 #include <asm/pgtable.h>
56 #include <asm/processor.h>
58 #include <asm/sections.h>
59 #include <asm/setup.h>
61 #include <asm/system.h>
62 #include <asm/unistd.h>
63 #include <asm/hpsim.h>
65 #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
66 # error "struct cpuinfo_ia64 too big!"
70 unsigned long __per_cpu_offset[NR_CPUS];
71 EXPORT_SYMBOL(__per_cpu_offset);
74 extern void ia64_setup_printk_clock(void);
76 DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info);
77 DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
78 unsigned long ia64_cycles_per_usec;
79 struct ia64_boot_param *ia64_boot_param;
80 struct screen_info screen_info;
81 unsigned long vga_console_iobase;
82 unsigned long vga_console_membase;
84 static struct resource data_resource = {
85 .name = "Kernel data",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
89 static struct resource code_resource = {
90 .name = "Kernel code",
91 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
94 static struct resource bss_resource = {
96 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
98 extern char _text[], _end[], _etext[], _edata[], _bss[];
100 unsigned long ia64_max_cacheline_size;
102 int dma_get_cache_alignment(void)
104 return ia64_max_cacheline_size;
106 EXPORT_SYMBOL(dma_get_cache_alignment);
108 unsigned long ia64_iobase; /* virtual address for I/O accesses */
109 EXPORT_SYMBOL(ia64_iobase);
110 struct io_space io_space[MAX_IO_SPACES];
111 EXPORT_SYMBOL(io_space);
112 unsigned int num_io_spaces;
115 * "flush_icache_range()" needs to know what processor dependent stride size to use
116 * when it makes i-cache(s) coherent with d-caches.
118 #define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes by 32 bytes */
119 unsigned long ia64_i_cache_stride_shift = ~0;
122 * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This
123 * mask specifies a mask of address bits that must be 0 in order for two buffers to be
124 * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start
125 * address of the second buffer must be aligned to (merge_mask+1) in order to be
126 * mergeable). By default, we assume there is no I/O MMU which can merge physically
127 * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu
130 unsigned long ia64_max_iommu_merge_mask = ~0UL;
131 EXPORT_SYMBOL(ia64_max_iommu_merge_mask);
134 * We use a special marker for the end of memory and it uses the extra (+1) slot
136 struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
137 int num_rsvd_regions __initdata;
141 * Filter incoming memory segments based on the primitive map created from the boot
142 * parameters. Segments contained in the map are removed from the memory ranges. A
143 * caller-specified function is called with the memory ranges that remain after filtering.
144 * This routine does not assume the incoming segments are sorted.
147 filter_rsvd_memory (unsigned long start, unsigned long end, void *arg)
149 unsigned long range_start, range_end, prev_start;
150 void (*func)(unsigned long, unsigned long, int);
154 if (start == PAGE_OFFSET) {
155 printk(KERN_WARNING "warning: skipping physical page 0\n");
157 if (start >= end) return 0;
161 * lowest possible address(walker uses virtual)
163 prev_start = PAGE_OFFSET;
166 for (i = 0; i < num_rsvd_regions; ++i) {
167 range_start = max(start, prev_start);
168 range_end = min(end, rsvd_region[i].start);
170 if (range_start < range_end)
171 call_pernode_memory(__pa(range_start), range_end - range_start, func);
173 /* nothing more available in this segment */
174 if (range_end == end) return 0;
176 prev_start = rsvd_region[i].end;
178 /* end of memory marker allows full processing inside loop body */
183 sort_regions (struct rsvd_region *rsvd_region, int max)
187 /* simple bubble sorting */
189 for (j = 0; j < max; ++j) {
190 if (rsvd_region[j].start > rsvd_region[j+1].start) {
191 struct rsvd_region tmp;
192 tmp = rsvd_region[j];
193 rsvd_region[j] = rsvd_region[j + 1];
194 rsvd_region[j + 1] = tmp;
201 * Request address space for all standard resources
203 static int __init register_memory(void)
205 code_resource.start = ia64_tpa(_text);
206 code_resource.end = ia64_tpa(_etext) - 1;
207 data_resource.start = ia64_tpa(_etext);
208 data_resource.end = ia64_tpa(_edata) - 1;
209 bss_resource.start = ia64_tpa(_bss);
210 bss_resource.end = ia64_tpa(_end) - 1;
211 efi_initialize_iomem_resources(&code_resource, &data_resource,
217 __initcall(register_memory);
221 static void __init setup_crashkernel(unsigned long total, int *n)
223 unsigned long long base = 0, size = 0;
226 ret = parse_crashkernel(boot_command_line, total,
228 if (ret == 0 && size > 0) {
230 sort_regions(rsvd_region, *n);
231 base = kdump_find_rsvd_region(size,
235 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
236 "for crashkernel (System RAM: %ldMB)\n",
237 (unsigned long)(size >> 20),
238 (unsigned long)(base >> 20),
239 (unsigned long)(total >> 20));
240 rsvd_region[*n].start =
241 (unsigned long)__va(base);
242 rsvd_region[*n].end =
243 (unsigned long)__va(base + size);
245 crashk_res.start = base;
246 crashk_res.end = base + size - 1;
249 efi_memmap_res.start = ia64_boot_param->efi_memmap;
250 efi_memmap_res.end = efi_memmap_res.start +
251 ia64_boot_param->efi_memmap_size;
252 boot_param_res.start = __pa(ia64_boot_param);
253 boot_param_res.end = boot_param_res.start +
254 sizeof(*ia64_boot_param);
257 static inline void __init setup_crashkernel(unsigned long total, int *n)
262 * reserve_memory - setup reserved memory areas
264 * Setup the reserved memory areas set aside for the boot parameters,
265 * initrd, etc. There are currently %IA64_MAX_RSVD_REGIONS defined,
266 * see include/asm-ia64/meminit.h if you need to define more.
269 reserve_memory (void)
272 unsigned long total_memory;
275 * none of the entries in this table overlap
277 rsvd_region[n].start = (unsigned long) ia64_boot_param;
278 rsvd_region[n].end = rsvd_region[n].start + sizeof(*ia64_boot_param);
281 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->efi_memmap);
282 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->efi_memmap_size;
285 rsvd_region[n].start = (unsigned long) __va(ia64_boot_param->command_line);
286 rsvd_region[n].end = (rsvd_region[n].start
287 + strlen(__va(ia64_boot_param->command_line)) + 1);
290 rsvd_region[n].start = (unsigned long) ia64_imva((void *)KERNEL_START);
291 rsvd_region[n].end = (unsigned long) ia64_imva(_end);
294 #ifdef CONFIG_BLK_DEV_INITRD
295 if (ia64_boot_param->initrd_start) {
296 rsvd_region[n].start = (unsigned long)__va(ia64_boot_param->initrd_start);
297 rsvd_region[n].end = rsvd_region[n].start + ia64_boot_param->initrd_size;
302 #ifdef CONFIG_PROC_VMCORE
303 if (reserve_elfcorehdr(&rsvd_region[n].start,
304 &rsvd_region[n].end) == 0)
308 total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
311 setup_crashkernel(total_memory, &n);
313 /* end of memory marker */
314 rsvd_region[n].start = ~0UL;
315 rsvd_region[n].end = ~0UL;
318 num_rsvd_regions = n;
319 BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
321 sort_regions(rsvd_region, num_rsvd_regions);
326 * find_initrd - get initrd parameters from the boot parameter structure
328 * Grab the initrd start and end from the boot parameter struct given us by
334 #ifdef CONFIG_BLK_DEV_INITRD
335 if (ia64_boot_param->initrd_start) {
336 initrd_start = (unsigned long)__va(ia64_boot_param->initrd_start);
337 initrd_end = initrd_start+ia64_boot_param->initrd_size;
339 printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
340 initrd_start, ia64_boot_param->initrd_size);
348 unsigned long phys_iobase;
351 * Set `iobase' based on the EFI memory map or, failing that, the
352 * value firmware left in ar.k0.
354 * Note that in ia32 mode, IN/OUT instructions use ar.k0 to compute
355 * the port's virtual address, so ia32_load_state() loads it with a
356 * user virtual address. But in ia64 mode, glibc uses the
357 * *physical* address in ar.k0 to mmap the appropriate area from
358 * /dev/mem, and the inX()/outX() interfaces use MMIO. In both
359 * cases, user-mode can only use the legacy 0-64K I/O port space.
361 * ar.k0 is not involved in kernel I/O port accesses, which can use
362 * any of the I/O port spaces and are done via MMIO using the
363 * virtual mmio_base from the appropriate io_space[].
365 phys_iobase = efi_get_iobase();
367 phys_iobase = ia64_get_kr(IA64_KR_IO_BASE);
368 printk(KERN_INFO "No I/O port range found in EFI memory map, "
369 "falling back to AR.KR0 (0x%lx)\n", phys_iobase);
371 ia64_iobase = (unsigned long) ioremap(phys_iobase, 0);
372 ia64_set_kr(IA64_KR_IO_BASE, __pa(ia64_iobase));
374 /* setup legacy IO port space */
375 io_space[0].mmio_base = ia64_iobase;
376 io_space[0].sparse = 1;
381 * early_console_setup - setup debugging console
383 * Consoles started here require little enough setup that we can start using
384 * them very early in the boot process, either right after the machine
385 * vector initialization, or even before if the drivers can detect their hw.
387 * Returns non-zero if a console couldn't be setup.
389 static inline int __init
390 early_console_setup (char *cmdline)
394 #ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
396 extern int sn_serial_console_early_setup(void);
397 if (!sn_serial_console_early_setup())
401 #ifdef CONFIG_EFI_PCDP
402 if (!efi_setup_pcdp_console(cmdline))
405 if (!simcons_register())
408 return (earlycons) ? 0 : -1;
412 mark_bsp_online (void)
415 /* If we register an early console, allow CPU 0 to printk */
416 cpu_set(smp_processor_id(), cpu_online_map);
422 check_for_logical_procs (void)
424 pal_logical_to_physical_t info;
427 status = ia64_pal_logical_to_phys(0, &info);
429 printk(KERN_INFO "No logical to physical processor mapping "
434 printk(KERN_ERR "ia64_pal_logical_to_phys failed with %ld\n",
439 * Total number of siblings that BSP has. Though not all of them
440 * may have booted successfully. The correct number of siblings
441 * booted is in info.overview_num_log.
443 smp_num_siblings = info.overview_tpc;
444 smp_num_cpucores = info.overview_cpp;
448 static __initdata int nomca;
449 static __init int setup_nomca(char *s)
454 early_param("nomca", setup_nomca);
456 #ifdef CONFIG_PROC_VMCORE
457 /* elfcorehdr= specifies the location of elf core header
458 * stored by the crashed kernel.
460 static int __init parse_elfcorehdr(char *arg)
465 elfcorehdr_addr = memparse(arg, &arg);
468 early_param("elfcorehdr", parse_elfcorehdr);
470 int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
472 unsigned long length;
474 /* We get the address using the kernel command line,
475 * but the size is extracted from the EFI tables.
476 * Both address and size are required for reservation
480 if (elfcorehdr_addr >= ELFCORE_ADDR_MAX)
483 if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
484 elfcorehdr_addr = ELFCORE_ADDR_MAX;
488 *start = (unsigned long)__va(elfcorehdr_addr);
489 *end = *start + length;
493 #endif /* CONFIG_PROC_VMCORE */
496 setup_arch (char **cmdline_p)
500 ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
502 *cmdline_p = __va(ia64_boot_param->command_line);
503 strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
508 #ifdef CONFIG_IA64_GENERIC
509 /* machvec needs to be parsed from the command line
510 * before parse_early_param() is called to ensure
511 * that ia64_mv is initialised before any command line
512 * settings may cause console setup to occur
514 machvec_init_from_cmdline(*cmdline_p);
519 if (early_console_setup(*cmdline_p) == 0)
523 /* Initialize the ACPI boot-time table parser */
525 # ifdef CONFIG_ACPI_NUMA
530 smp_build_cpu_map(); /* happens, e.g., with the Ski simulator */
532 #endif /* CONFIG_APCI_BOOT */
536 /* process SAL system table: */
537 ia64_sal_init(__va(efi.sal_systab));
539 ia64_setup_printk_clock();
542 cpu_physical_id(0) = hard_smp_processor_id();
543 check_for_logical_procs();
544 if (smp_num_cpucores > 1)
546 "cpu package is Multi-Core capable: number of cores=%d\n",
548 if (smp_num_siblings > 1)
550 "cpu package is Multi-Threading capable: number of siblings=%d\n",
554 cpu_init(); /* initialize the bootstrap CPU */
555 mmu_context_init(); /* initialize context_id bitmap */
557 check_sal_cache_flush();
565 # if defined(CONFIG_DUMMY_CONSOLE)
566 conswitchp = &dummy_con;
568 # if defined(CONFIG_VGA_CONSOLE)
570 * Non-legacy systems may route legacy VGA MMIO range to system
571 * memory. vga_con probes the MMIO hole, so memory looks like
572 * a VGA device to it. The EFI memory map can tell us if it's
573 * memory so we can avoid this problem.
575 if (efi_mem_type(0xA0000) != EFI_CONVENTIONAL_MEMORY)
576 conswitchp = &vga_con;
581 /* enable IA-64 Machine Check Abort Handling unless disabled */
585 platform_setup(cmdline_p);
590 * Display cpu info for all CPUs.
593 show_cpuinfo (struct seq_file *m, void *v)
596 # define lpj c->loops_per_jiffy
597 # define cpunum c->cpu
599 # define lpj loops_per_jiffy
604 const char *feature_name;
606 { 1UL << 0, "branchlong" },
607 { 1UL << 1, "spontaneous deferral"},
608 { 1UL << 2, "16-byte atomic ops" }
610 char features[128], *cp, *sep;
611 struct cpuinfo_ia64 *c = v;
613 unsigned long proc_freq;
618 /* build the feature string: */
619 memcpy(features, "standard", 9);
621 size = sizeof(features);
623 for (i = 0; i < ARRAY_SIZE(feature_bits) && size > 1; ++i) {
624 if (mask & feature_bits[i].mask) {
625 cp += snprintf(cp, size, "%s%s", sep,
626 feature_bits[i].feature_name),
628 mask &= ~feature_bits[i].mask;
629 size = sizeof(features) - (cp - features);
632 if (mask && size > 1) {
633 /* print unknown features as a hex value */
634 snprintf(cp, size, "%s0x%lx", sep, mask);
637 proc_freq = cpufreq_quick_get(cpunum);
639 proc_freq = c->proc_freq / 1000;
653 "cpu MHz : %lu.%03lu\n"
654 "itc MHz : %lu.%06lu\n"
655 "BogoMIPS : %lu.%02lu\n",
656 cpunum, c->vendor, c->family, c->model,
657 c->model_name, c->revision, c->archrev,
658 features, c->ppn, c->number,
659 proc_freq / 1000, proc_freq % 1000,
660 c->itc_freq / 1000000, c->itc_freq % 1000000,
661 lpj*HZ/500000, (lpj*HZ/5000) % 100);
663 seq_printf(m, "siblings : %u\n", cpus_weight(cpu_core_map[cpunum]));
664 if (c->threads_per_core > 1 || c->cores_per_socket > 1)
669 c->socket_id, c->core_id, c->thread_id);
677 c_start (struct seq_file *m, loff_t *pos)
680 while (*pos < NR_CPUS && !cpu_isset(*pos, cpu_online_map))
683 return *pos < NR_CPUS ? cpu_data(*pos) : NULL;
687 c_next (struct seq_file *m, void *v, loff_t *pos)
690 return c_start(m, pos);
694 c_stop (struct seq_file *m, void *v)
698 struct seq_operations cpuinfo_op = {
706 static char brandname[MAX_BRANDS][128];
708 static char * __cpuinit
709 get_model_name(__u8 family, __u8 model)
715 memcpy(brand, "Unknown", 8);
716 if (ia64_pal_get_brand_info(brand)) {
718 memcpy(brand, "Merced", 7);
719 else if (family == 0x1f) switch (model) {
720 case 0: memcpy(brand, "McKinley", 9); break;
721 case 1: memcpy(brand, "Madison", 8); break;
722 case 2: memcpy(brand, "Madison up to 9M cache", 23); break;
725 for (i = 0; i < MAX_BRANDS; i++)
726 if (strcmp(brandname[i], brand) == 0)
728 for (i = 0; i < MAX_BRANDS; i++)
729 if (brandname[i][0] == '\0')
730 return strcpy(brandname[i], brand);
733 "%s: Table overflow. Some processor model information will be missing\n",
738 static void __cpuinit
739 identify_cpu (struct cpuinfo_ia64 *c)
742 unsigned long bits[5];
748 u64 ppn; /* processor serial number */
752 unsigned revision : 8;
755 unsigned archrev : 8;
756 unsigned reserved : 24;
762 pal_vm_info_1_u_t vm1;
763 pal_vm_info_2_u_t vm2;
765 unsigned long impl_va_msb = 50, phys_addr_size = 44; /* Itanium defaults */
767 for (i = 0; i < 5; ++i)
768 cpuid.bits[i] = ia64_get_cpuid(i);
770 memcpy(c->vendor, cpuid.field.vendor, 16);
772 c->cpu = smp_processor_id();
774 /* below default values will be overwritten by identify_siblings()
775 * for Multi-Threading/Multi-Core capable CPUs
777 c->threads_per_core = c->cores_per_socket = c->num_log = 1;
780 identify_siblings(c);
782 c->ppn = cpuid.field.ppn;
783 c->number = cpuid.field.number;
784 c->revision = cpuid.field.revision;
785 c->model = cpuid.field.model;
786 c->family = cpuid.field.family;
787 c->archrev = cpuid.field.archrev;
788 c->features = cpuid.field.features;
789 c->model_name = get_model_name(c->family, c->model);
791 status = ia64_pal_vm_summary(&vm1, &vm2);
792 if (status == PAL_STATUS_SUCCESS) {
793 impl_va_msb = vm2.pal_vm_info_2_s.impl_va_msb;
794 phys_addr_size = vm1.pal_vm_info_1_s.phys_add_size;
796 c->unimpl_va_mask = ~((7L<<61) | ((1L << (impl_va_msb + 1)) - 1));
797 c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
801 setup_per_cpu_areas (void)
803 /* start_kernel() requires this... */
804 #ifdef CONFIG_ACPI_HOTPLUG_CPU
805 prefill_possible_map();
810 * Calculate the max. cache line size.
812 * In addition, the minimum of the i-cache stride sizes is calculated for
813 * "flush_icache_range()".
815 static void __cpuinit
816 get_max_cacheline_size (void)
818 unsigned long line_size, max = 1;
819 u64 l, levels, unique_caches;
820 pal_cache_config_info_t cci;
823 status = ia64_pal_cache_summary(&levels, &unique_caches);
825 printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
826 __FUNCTION__, status);
827 max = SMP_CACHE_BYTES;
828 /* Safest setup for "flush_icache_range()" */
829 ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
833 for (l = 0; l < levels; ++l) {
834 status = ia64_pal_cache_config_info(l, /* cache_type (data_or_unified)= */ 2,
838 "%s: ia64_pal_cache_config_info(l=%lu, 2) failed (status=%ld)\n",
839 __FUNCTION__, l, status);
840 max = SMP_CACHE_BYTES;
841 /* The safest setup for "flush_icache_range()" */
842 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
843 cci.pcci_unified = 1;
845 line_size = 1 << cci.pcci_line_size;
848 if (!cci.pcci_unified) {
849 status = ia64_pal_cache_config_info(l,
850 /* cache_type (instruction)= */ 1,
854 "%s: ia64_pal_cache_config_info(l=%lu, 1) failed (status=%ld)\n",
855 __FUNCTION__, l, status);
856 /* The safest setup for "flush_icache_range()" */
857 cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
860 if (cci.pcci_stride < ia64_i_cache_stride_shift)
861 ia64_i_cache_stride_shift = cci.pcci_stride;
864 if (max > ia64_max_cacheline_size)
865 ia64_max_cacheline_size = max;
869 * cpu_init() initializes state that is per-CPU. This function acts
870 * as a 'CPU state barrier', nothing should get across.
875 extern void __cpuinit ia64_mmu_init (void *);
876 static unsigned long max_num_phys_stacked = IA64_NUM_PHYS_STACK_REG;
877 unsigned long num_phys_stacked;
878 pal_vm_info_2_u_t vmi;
879 unsigned int max_ctx;
880 struct cpuinfo_ia64 *cpu_info;
883 cpu_data = per_cpu_init();
886 * insert boot cpu into sibling and core mapes
887 * (must be done after per_cpu area is setup)
889 if (smp_processor_id() == 0) {
890 cpu_set(0, per_cpu(cpu_sibling_map, 0));
891 cpu_set(0, cpu_core_map[0]);
896 * We set ar.k3 so that assembly code in MCA handler can compute
897 * physical addresses of per cpu variables with a simple:
898 * phys = ar.k3 + &per_cpu_var
900 ia64_set_kr(IA64_KR_PER_CPU_DATA,
901 ia64_tpa(cpu_data) - (long) __per_cpu_start);
903 get_max_cacheline_size();
906 * We can't pass "local_cpu_data" to identify_cpu() because we haven't called
907 * ia64_mmu_init() yet. And we can't call ia64_mmu_init() first because it
908 * depends on the data returned by identify_cpu(). We break the dependency by
909 * accessing cpu_data() through the canonical per-CPU address.
911 cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
912 identify_cpu(cpu_info);
914 #ifdef CONFIG_MCKINLEY
916 # define FEATURE_SET 16
917 struct ia64_pal_retval iprv;
919 if (cpu_info->family == 0x1f) {
920 PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
921 if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
922 PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
923 (iprv.v1 | 0x80), FEATURE_SET, 0);
928 /* Clear the stack memory reserved for pt_regs: */
929 memset(task_pt_regs(current), 0, sizeof(struct pt_regs));
931 ia64_set_kr(IA64_KR_FPU_OWNER, 0);
934 * Initialize the page-table base register to a global
935 * directory with all zeroes. This ensure that we can handle
936 * TLB-misses to user address-space even before we created the
937 * first user address-space. This may happen, e.g., due to
938 * aggressive use of lfetch.fault.
940 ia64_set_kr(IA64_KR_PT_BASE, __pa(ia64_imva(empty_zero_page)));
943 * Initialize default control register to defer speculative faults except
944 * for those arising from TLB misses, which are not deferred. The
945 * kernel MUST NOT depend on a particular setting of these bits (in other words,
946 * the kernel must have recovery code for all speculative accesses). Turn on
947 * dcr.lc as per recommendation by the architecture team. Most IA-32 apps
948 * shouldn't be affected by this (moral: keep your ia32 locks aligned and you'll
951 ia64_setreg(_IA64_REG_CR_DCR, ( IA64_DCR_DP | IA64_DCR_DK | IA64_DCR_DX | IA64_DCR_DR
952 | IA64_DCR_DA | IA64_DCR_DD | IA64_DCR_LC));
953 atomic_inc(&init_mm.mm_count);
954 current->active_mm = &init_mm;
958 ia64_mmu_init(ia64_imva(cpu_data));
959 ia64_mca_cpu_init(ia64_imva(cpu_data));
961 #ifdef CONFIG_IA32_SUPPORT
965 /* Clear ITC to eliminate sched_clock() overflows in human time. */
968 /* disable all local interrupt sources: */
969 ia64_set_itv(1 << 16);
970 ia64_set_lrr0(1 << 16);
971 ia64_set_lrr1(1 << 16);
972 ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
973 ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
975 /* clear TPR & XTP to enable all interrupt classes: */
976 ia64_setreg(_IA64_REG_CR_TPR, 0);
978 /* Clear any pending interrupts left by SAL/EFI */
979 while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
986 /* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
987 if (ia64_pal_vm_summary(NULL, &vmi) == 0)
988 max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
990 printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
991 max_ctx = (1U << 15) - 1; /* use architected minimum */
993 while (max_ctx < ia64_ctx.max_ctx) {
994 unsigned int old = ia64_ctx.max_ctx;
995 if (cmpxchg(&ia64_ctx.max_ctx, old, max_ctx) == old)
999 if (ia64_pal_rse_info(&num_phys_stacked, NULL) != 0) {
1000 printk(KERN_WARNING "cpu_init: PAL RSE info failed; assuming 96 physical "
1002 num_phys_stacked = 96;
1004 /* size of physical stacked register partition plus 8 bytes: */
1005 if (num_phys_stacked > max_num_phys_stacked) {
1006 ia64_patch_phys_stack_reg(num_phys_stacked*8 + 8);
1007 max_num_phys_stacked = num_phys_stacked;
1009 platform_cpu_init();
1010 pm_idle = default_idle;
1016 ia64_patch_mckinley_e9((unsigned long) __start___mckinley_e9_bundles,
1017 (unsigned long) __end___mckinley_e9_bundles);
1020 static int __init run_dmi_scan(void)
1025 core_initcall(run_dmi_scan);