diff options
Diffstat (limited to 'linux-2.4-xen-sparse/arch/xen/kernel/setup.c')
| -rw-r--r-- | linux-2.4-xen-sparse/arch/xen/kernel/setup.c | 1213 |
1 files changed, 0 insertions, 1213 deletions
diff --git a/linux-2.4-xen-sparse/arch/xen/kernel/setup.c b/linux-2.4-xen-sparse/arch/xen/kernel/setup.c deleted file mode 100644 index 230e0bb66a..0000000000 --- a/linux-2.4-xen-sparse/arch/xen/kernel/setup.c +++ /dev/null @@ -1,1213 +0,0 @@ -/* - * linux/arch/i386/kernel/setup.c - * - * Copyright (C) 1995 Linus Torvalds - */ - -/* - * This file handles the architecture-dependent parts of initialization - */ - -#define __KERNEL_SYSCALLS__ -static int errno; -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/user.h> -#include <linux/a.out.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/config.h> -#include <linux/init.h> -#include <linux/apm_bios.h> -#ifdef CONFIG_BLK_DEV_RAM -#include <linux/blk.h> -#endif -#include <linux/highmem.h> -#include <linux/bootmem.h> -#include <linux/seq_file.h> -#include <linux/reboot.h> -#include <asm/processor.h> -#include <linux/console.h> -#include <linux/module.h> -#include <asm/mtrr.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/io.h> -#include <asm/smp.h> -#include <asm/msr.h> -#include <asm/desc.h> -#include <asm/dma.h> -#include <asm/mpspec.h> -#include <asm/mmu_context.h> -#include <asm/ctrl_if.h> -#include <asm/hypervisor.h> -#include <asm-xen/xen-public/physdev.h> -#include <linux/netdevice.h> -#include <linux/rtnetlink.h> -#include <linux/tqueue.h> -#include <net/pkt_sched.h> /* dev_(de)activate */ - -/* - * Point at the empty zero page to start with. We map the real shared_info - * page as soon as fixmap is up and running. - */ -shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page; - -unsigned int *phys_to_machine_mapping, *pfn_to_mfn_frame_list; - -/* - * Machine setup.. - */ - -char ignore_irq13; /* set if exception 16 works */ -struct cpuinfo_x86 boot_cpu_data = { 0, 0, 0, 0, -1, 1, 0, 0, -1 }; - -unsigned long mmu_cr4_features; - -unsigned char * vgacon_mmap; - -/* - * Bus types .. - */ -#ifdef CONFIG_EISA -int EISA_bus; -#endif -int MCA_bus; - -/* for MCA, but anyone else can use it if they want */ -unsigned int machine_id; -unsigned int machine_submodel_id; -unsigned int BIOS_revision; -unsigned int mca_pentium_flag; - -/* For PCI or other memory-mapped resources */ -unsigned long pci_mem_start = 0x10000000; - -/* - * Setup options - */ -struct drive_info_struct { char dummy[32]; } drive_info; -struct screen_info screen_info; -struct apm_info apm_info; -struct sys_desc_table_struct { - unsigned short length; - unsigned char table[0]; -}; - -unsigned char aux_device_present; - -extern int root_mountflags; -extern char _text, _etext, _edata, _end; - -extern int blk_nohighio; - -int enable_acpi_smp_table; - -/* Raw start-of-day parameters from the hypervisor. */ -union xen_start_info_union xen_start_info_union; - -#define COMMAND_LINE_SIZE MAX_GUEST_CMDLINE -static char command_line[COMMAND_LINE_SIZE]; -char saved_command_line[COMMAND_LINE_SIZE]; - -/* parse_mem_cmdline() - * returns the value of the mem= boot param converted to pages or 0 - */ -static int __init parse_mem_cmdline (char ** cmdline_p) -{ - char c = ' ', *to = command_line, *from = saved_command_line; - int len = 0; - unsigned long long bytes; - int mem_param = 0; - - /* Save unparsed command line copy for /proc/cmdline */ - memcpy(saved_command_line, xen_start_info.cmd_line, COMMAND_LINE_SIZE); - saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; - - for (;;) { - /* - * "mem=nopentium" disables the 4MB page tables. - * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM - * to <mem>, overriding the bios size. - * "mem=XXX[KkmM]@XXX[KkmM]" defines a memory region from - * <start> to <start>+<mem>, overriding the bios size. - */ - if (c == ' ' && !memcmp(from, "mem=", 4)) { - if (to != command_line) - to--; - if (!memcmp(from+4, "nopentium", 9)) { - from += 9+4; - } else if (!memcmp(from+4, "exactmap", 8)) { - from += 8+4; - } else { - bytes = memparse(from+4, &from); - mem_param = bytes>>PAGE_SHIFT; - if (*from == '@') - (void)memparse(from+1, &from); - } - } - - c = *(from++); - if (!c) - break; - if (COMMAND_LINE_SIZE <= ++len) - break; - *(to++) = c; - } - *to = '\0'; - *cmdline_p = command_line; - - return mem_param; -} - -/* - * Every exception-fixup table is sorted (i.e., kernel main table, and every - * module table. Some elements may be out of order if they reference text.init, - * for example. - */ -static void sort_exception_table(struct exception_table_entry *start, - struct exception_table_entry *end) -{ - struct exception_table_entry *p, *q, tmp; - - for ( p = start; p < end; p++ ) - { - for ( q = p-1; q > start; q-- ) - if ( p->insn > q->insn ) - break; - if ( ++q != p ) - { - tmp = *p; - memmove(q+1, q, (p-q)*sizeof(*p)); - *q = tmp; - } - } -} - -int xen_module_init(struct module *mod) -{ - sort_exception_table(mod->ex_table_start, mod->ex_table_end); - return 0; -} - -void __init setup_arch(char **cmdline_p) -{ - int i,j; - unsigned long bootmap_size, start_pfn, lmax_low_pfn; - int mem_param; /* user specified memory size in pages */ - int boot_pfn; /* low pages available for bootmem */ - physdev_op_t op; - - extern void hypervisor_callback(void); - extern void failsafe_callback(void); - - extern unsigned long cpu0_pte_quicklist[]; - extern unsigned long cpu0_pgd_quicklist[]; - - extern const struct exception_table_entry __start___ex_table[]; - extern const struct exception_table_entry __stop___ex_table[]; - - extern char _stext; - - /* Force a quick death if the kernel panics. */ - extern int panic_timeout; - if ( panic_timeout == 0 ) - panic_timeout = 1; - - /* Ensure that the kernel exception-fixup table is sorted. */ - sort_exception_table(__start___ex_table, __stop___ex_table); - -#ifndef CONFIG_HIGHIO - blk_nohighio = 1; -#endif - - HYPERVISOR_vm_assist( - VMASST_CMD_enable, VMASST_TYPE_4gb_segments); - HYPERVISOR_vm_assist( - VMASST_CMD_enable, VMASST_TYPE_writable_pagetables); - - HYPERVISOR_set_callbacks( - __KERNEL_CS, (unsigned long)hypervisor_callback, - __KERNEL_CS, (unsigned long)failsafe_callback); - - boot_cpu_data.pgd_quick = cpu0_pgd_quicklist; - boot_cpu_data.pte_quick = cpu0_pte_quicklist; - - /* This must be initialized to UNNAMED_MAJOR for ipconfig to work - properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd. */ - ROOT_DEV = MKDEV(UNNAMED_MAJOR,0); - memset(&drive_info, 0, sizeof(drive_info)); - memset(&screen_info, 0, sizeof(screen_info)); - - /* This is drawn from a dump from vgacon:startup in standard Linux. */ - screen_info.orig_video_mode = 3; - screen_info.orig_video_isVGA = 1; - screen_info.orig_video_lines = 25; - screen_info.orig_video_cols = 80; - screen_info.orig_video_ega_bx = 3; - screen_info.orig_video_points = 16; - - memset(&apm_info.bios, 0, sizeof(apm_info.bios)); - aux_device_present = 0; -#ifdef CONFIG_BLK_DEV_RAM - rd_image_start = 0; - rd_prompt = 0; - rd_doload = 0; -#endif - - root_mountflags &= ~MS_RDONLY; - init_mm.start_code = (unsigned long) &_text; - init_mm.end_code = (unsigned long) &_etext; - init_mm.end_data = (unsigned long) &_edata; - init_mm.brk = (unsigned long) &_end; - - /* The mem= kernel command line param overrides the detected amount - * of memory. For xenolinux, if this override is larger than detected - * memory, then boot using only detected memory and make provisions to - * use all of the override value. The hypervisor can give this - * domain more memory later on and it will be added to the free - * lists at that time. See claim_new_pages() in - * arch/xen/drivers/balloon/balloon.c - */ - mem_param = parse_mem_cmdline(cmdline_p); - if (mem_param < xen_start_info.nr_pages) - mem_param = xen_start_info.nr_pages; - -#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) -#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) -#define PFN_PHYS(x) ((x) << PAGE_SHIFT) - -/* - * 128MB for vmalloc(), iomap(), kmap(), and fixaddr mappings. - */ -#define VMALLOC_RESERVE (unsigned long)(128 << 20) -#define MAXMEM (unsigned long)(HYPERVISOR_VIRT_START-PAGE_OFFSET-VMALLOC_RESERVE) -#define MAXMEM_PFN PFN_DOWN(MAXMEM) -#define MAX_NONPAE_PFN (1 << 20) - - /* - * Determine low and high memory ranges: - */ - lmax_low_pfn = max_pfn = mem_param; - if (lmax_low_pfn > MAXMEM_PFN) { - lmax_low_pfn = MAXMEM_PFN; -#ifndef CONFIG_HIGHMEM - /* Maximum memory usable is what is directly addressable */ - printk(KERN_WARNING "Warning only %ldMB will be used.\n", - MAXMEM>>20); - if (max_pfn > MAX_NONPAE_PFN) - printk(KERN_WARNING "Use a PAE enabled kernel.\n"); - else - printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); - max_pfn = lmax_low_pfn; -#else /* !CONFIG_HIGHMEM */ -#ifndef CONFIG_X86_PAE - if (max_pfn > MAX_NONPAE_PFN) { - max_pfn = MAX_NONPAE_PFN; - printk(KERN_WARNING "Warning only 4GB will be used.\n"); - printk(KERN_WARNING "Use a PAE enabled kernel.\n"); - } -#endif /* !CONFIG_X86_PAE */ -#endif /* !CONFIG_HIGHMEM */ - } - -#ifdef CONFIG_HIGHMEM - highstart_pfn = highend_pfn = max_pfn; - if (max_pfn > MAXMEM_PFN) { - highstart_pfn = MAXMEM_PFN; - printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", - pages_to_mb(highend_pfn - highstart_pfn)); - } -#endif - - phys_to_machine_mapping = (unsigned int *)xen_start_info.mfn_list; - cur_pgd = init_mm.pgd = (pgd_t *)xen_start_info.pt_base; - - start_pfn = (__pa(xen_start_info.pt_base) >> PAGE_SHIFT) + - xen_start_info.nr_pt_frames; - - /* - * Initialize the boot-time allocator, and free up all RAM. Then reserve - * space for OS image, initrd, phys->machine table, bootstrap page table, - * and the bootmem bitmap. - * NB. There is definitely enough room for the bootmem bitmap in the - * bootstrap page table. We are guaranteed to get >=512kB unused 'padding' - * for our own use after all bootstrap elements - * (see asm-xen/xen-public/xen.h). - */ - boot_pfn = min((int)xen_start_info.nr_pages,lmax_low_pfn); - bootmap_size = init_bootmem(start_pfn,boot_pfn); - free_bootmem(0, PFN_PHYS(boot_pfn)); - reserve_bootmem(__pa(&_stext), - PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE-1 - - __pa(&_stext)); - - /* init_bootmem() set the global max_low_pfn to boot_pfn. Now max_low_pfn - * can be set to the override value. - */ - max_low_pfn = lmax_low_pfn; - -#ifdef CONFIG_BLK_DEV_INITRD - if ( xen_start_info.mod_start != 0 ) - { - if ( (__pa(xen_start_info.mod_start) + xen_start_info.mod_len) <= - (max_low_pfn << PAGE_SHIFT) ) - { - initrd_start = xen_start_info.mod_start; - initrd_end = initrd_start + xen_start_info.mod_len; - initrd_below_start_ok = 1; - } - else - { - printk(KERN_ERR "initrd extends beyond end of memory " - "(0x%08lx > 0x%08lx)\ndisabling initrd\n", - __pa(xen_start_info.mod_start) + xen_start_info.mod_len, - max_low_pfn << PAGE_SHIFT); - initrd_start = 0; - } - } -#endif - - paging_init(); - - /* Make sure we have a correctly sized P->M table. */ - if ( max_pfn != xen_start_info.nr_pages ) - { - phys_to_machine_mapping = alloc_bootmem_low_pages( - max_pfn * sizeof(unsigned long)); - if ( max_pfn > xen_start_info.nr_pages ) - { - memset(phys_to_machine_mapping, ~0, - max_pfn * sizeof(unsigned long)); - memcpy(phys_to_machine_mapping, - (unsigned long *)xen_start_info.mfn_list, - xen_start_info.nr_pages * sizeof(unsigned long)); - } - else - { - memcpy(phys_to_machine_mapping, - (unsigned long *)xen_start_info.mfn_list, - max_pfn * sizeof(unsigned long)); - if (HYPERVISOR_dom_mem_op( - MEMOP_decrease_reservation, - (unsigned long *)xen_start_info.mfn_list + max_pfn, - xen_start_info.nr_pages - max_pfn, 0) != - (xen_start_info.nr_pages - max_pfn)) - BUG(); - } - free_bootmem(__pa(xen_start_info.mfn_list), - PFN_PHYS(PFN_UP(xen_start_info.nr_pages * - sizeof(unsigned long)))); - } - - pfn_to_mfn_frame_list = alloc_bootmem_low_pages(PAGE_SIZE); - for ( i=0, j=0; i < max_pfn; i+=(PAGE_SIZE/sizeof(unsigned long)), j++ ) - { - pfn_to_mfn_frame_list[j] = - virt_to_machine(&phys_to_machine_mapping[i]) >> PAGE_SHIFT; - } - HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list = - virt_to_machine(pfn_to_mfn_frame_list) >> PAGE_SHIFT; - - op.cmd = PHYSDEVOP_SET_IOPL; - op.u.set_iopl.iopl = current->thread.io_pl = 1; - HYPERVISOR_physdev_op(&op); - - if (xen_start_info.flags & SIF_INITDOMAIN ) - { - if( !(xen_start_info.flags & SIF_PRIVILEGED) ) - panic("Xen granted us console access but not privileged status"); - -#if defined(CONFIG_VT) -#if defined(CONFIG_VGA_CONSOLE) - conswitchp = &vga_con; -#elif defined(CONFIG_DUMMY_CONSOLE) - conswitchp = &dummy_con; -#endif -#endif - } -} - -static int cachesize_override __initdata = -1; -static int __init cachesize_setup(char *str) -{ - get_option (&str, &cachesize_override); - return 1; -} -__setup("cachesize=", cachesize_setup); - -static int __init highio_setup(char *str) -{ - printk("i386: disabling HIGHMEM block I/O\n"); - blk_nohighio = 1; - return 1; -} -__setup("nohighio", highio_setup); - -static int __init get_model_name(struct cpuinfo_x86 *c) -{ - unsigned int *v; - char *p, *q; - - if (cpuid_eax(0x80000000) < 0x80000004) - return 0; - - v = (unsigned int *) c->x86_model_id; - cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]); - cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]); - cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]); - c->x86_model_id[48] = 0; - - /* Intel chips right-justify this string for some dumb reason; - undo that brain damage */ - p = q = &c->x86_model_id[0]; - while ( *p == ' ' ) - p++; - if ( p != q ) { - while ( *p ) - *q++ = *p++; - while ( q <= &c->x86_model_id[48] ) - *q++ = '\0'; /* Zero-pad the rest */ - } - - return 1; -} - - -static void __init display_cacheinfo(struct cpuinfo_x86 *c) -{ - unsigned int n, dummy, ecx, edx, l2size; - - n = cpuid_eax(0x80000000); - - if (n >= 0x80000005) { - cpuid(0x80000005, &dummy, &dummy, &ecx, &edx); - printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n", - edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); - c->x86_cache_size=(ecx>>24)+(edx>>24); - } - - if (n < 0x80000006) /* Some chips just has a large L1. */ - return; - - ecx = cpuid_ecx(0x80000006); - l2size = ecx >> 16; - - /* AMD errata T13 (order #21922) */ - if ((c->x86_vendor == X86_VENDOR_AMD) && (c->x86 == 6)) { - if (c->x86_model == 3 && c->x86_mask == 0) /* Duron Rev A0 */ - l2size = 64; - if (c->x86_model == 4 && - (c->x86_mask==0 || c->x86_mask==1)) /* Tbird rev A1/A2 */ - l2size = 256; - } - - /* Intel PIII Tualatin. This comes in two flavours. - * One has 256kb of cache, the other 512. We have no way - * to determine which, so we use a boottime override - * for the 512kb model, and assume 256 otherwise. - */ - if ((c->x86_vendor == X86_VENDOR_INTEL) && (c->x86 == 6) && - (c->x86_model == 11) && (l2size == 0)) - l2size = 256; - - if (c->x86_vendor == X86_VENDOR_CENTAUR) { - /* VIA C3 CPUs (670-68F) need further shifting. */ - if ((c->x86 == 6) && - ((c->x86_model == 7) || (c->x86_model == 8))) { - l2size >>= 8; - } - - /* VIA also screwed up Nehemiah stepping 1, and made - it return '65KB' instead of '64KB' - - Note, it seems this may only be in engineering samples. */ - if ((c->x86==6) && (c->x86_model==9) && - (c->x86_mask==1) && (l2size==65)) - l2size -= 1; - } - - /* Allow user to override all this if necessary. */ - if (cachesize_override != -1) - l2size = cachesize_override; - - if ( l2size == 0 ) - return; /* Again, no L2 cache is possible */ - - c->x86_cache_size = l2size; - - printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n", - l2size, ecx & 0xFF); -} - -static void __init init_c3(struct cpuinfo_x86 *c) -{ - /* Test for Centaur Extended Feature Flags presence */ - if (cpuid_eax(0xC0000000) >= 0xC0000001) { - /* store Centaur Extended Feature Flags as - * word 5 of the CPU capability bit array - */ - c->x86_capability[5] = cpuid_edx(0xC0000001); - } - - switch (c->x86_model) { - case 9: /* Nehemiah */ - default: - get_model_name(c); - display_cacheinfo(c); - break; - } -} - -static void __init init_centaur(struct cpuinfo_x86 *c) -{ - /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; - 3DNow is IDd by bit 31 in extended CPUID (1*3231) anyway */ - clear_bit(0*32+31, &c->x86_capability); - - switch (c->x86) { - case 6: - init_c3(c); - break; - default: - panic("Unsupported Centaur CPU (%i)\n", c->x86); - } -} - -static int __init init_amd(struct cpuinfo_x86 *c) -{ - int r; - - /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; - 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */ - clear_bit(0*32+31, &c->x86_capability); - - r = get_model_name(c); - - switch(c->x86) - { - case 5: /* We don't like AMD K6 */ - panic("Unsupported AMD processor\n"); - case 6: /* An Athlon/Duron. We can trust the BIOS probably */ - break; - } - - display_cacheinfo(c); - return r; -} - - -static void __init init_intel(struct cpuinfo_x86 *c) -{ - char *p = NULL; - unsigned int l1i = 0, l1d = 0, l2 = 0, l3 = 0; /* Cache sizes */ - - if (c->cpuid_level > 1) { - /* supports eax=2 call */ - int i, j, n; - int regs[4]; - unsigned char *dp = (unsigned char *)regs; - - /* Number of times to iterate */ - n = cpuid_eax(2) & 0xFF; - - for ( i = 0 ; i < n ; i++ ) { - cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]); - - /* If bit 31 is set, this is an unknown format */ - for ( j = 0 ; j < 3 ; j++ ) { - if ( regs[j] < 0 ) regs[j] = 0; - } - - /* Byte 0 is level count, not a descriptor */ - for ( j = 1 ; j < 16 ; j++ ) { - unsigned char des = dp[j]; - unsigned char dl, dh; - unsigned int cs; - - dh = des >> 4; - dl = des & 0x0F; - - /* Black magic... */ - - switch ( dh ) - { - case 0: - switch ( dl ) { - case 6: - /* L1 I cache */ - l1i += 8; - break; - case 8: - /* L1 I cache */ - l1i += 16; - break; - case 10: - /* L1 D cache */ - l1d += 8; - break; - case 12: - /* L1 D cache */ - l1d += 16; - break; - default:; - /* TLB, or unknown */ - } - break; - case 2: - if ( dl ) { - /* L3 cache */ - cs = (dl-1) << 9; - l3 += cs; - } - break; - case 4: - if ( c->x86 > 6 && dl ) { - /* P4 family */ - /* L3 cache */ - cs = 128 << (dl-1); - l3 += cs; - break; - } - /* else same as 8 - fall through */ - case 8: - if ( dl ) { - /* L2 cache */ - cs = 128 << (dl-1); - l2 += cs; - } - break; - case 6: - if (dl > 5) { - /* L1 D cache */ - cs = 8<<(dl-6); - l1d += cs; - } - break; - case 7: - if ( dl >= 8 ) - { - /* L2 cache */ - cs = 64<<(dl-8); - l2 += cs; - } else { - /* L0 I cache, count as L1 */ - cs = dl ? (16 << (dl-1)) : 12; - l1i += cs; - } - break; - default: - /* TLB, or something else we don't know about */ - break; - } - } - } - if ( l1i || l1d ) - printk(KERN_INFO "CPU: L1 I cache: %dK, L1 D cache: %dK\n", - l1i, l1d); - if ( l2 ) - printk(KERN_INFO "CPU: L2 cache: %dK\n", l2); - if ( l3 ) - printk(KERN_INFO "CPU: L3 cache: %dK\n", l3); - - /* - * This assumes the L3 cache is shared; it typically lives in - * the northbridge. The L1 caches are included by the L2 - * cache, and so should not be included for the purpose of - * SMP switching weights. - */ - c->x86_cache_size = l2 ? l2 : (l1i+l1d); - } - - /* SEP CPUID bug: Pentium Pro reports SEP but doesn't have it */ - if ( c->x86 == 6 && c->x86_model < 3 && c->x86_mask < 3 ) - clear_bit(X86_FEATURE_SEP, &c->x86_capability); - - /* Names for the Pentium II/Celeron processors - detectable only by also checking the cache size. - Dixon is NOT a Celeron. */ - if (c->x86 == 6) { - switch (c->x86_model) { - case 5: - if (l2 == 0) - p = "Celeron (Covington)"; - if (l2 == 256) - p = "Mobile Pentium II (Dixon)"; - break; - - case 6: - if (l2 == 128) - p = "Celeron (Mendocino)"; - break; - - case 8: - if (l2 == 128) - p = "Celeron (Coppermine)"; - break; - } - } - - if ( p ) - strcpy(c->x86_model_id, p); -} - -void __init get_cpu_vendor(struct cpuinfo_x86 *c) -{ - char *v = c->x86_vendor_id; - - if (!strcmp(v, "GenuineIntel")) - c->x86_vendor = X86_VENDOR_INTEL; - else if (!strcmp(v, "AuthenticAMD")) - c->x86_vendor = X86_VENDOR_AMD; - else if (!strcmp(v, "CentaurHauls")) - c->x86_vendor = X86_VENDOR_CENTAUR; - else - c->x86_vendor = X86_VENDOR_UNKNOWN; -} - -struct cpu_model_info { - int vendor; - int family; - char *model_names[16]; -}; - -/* Naming convention should be: <Name> [(<Codename>)] */ -/* This table only is used unless init_<vendor>() below doesn't set it; */ -/* in particular, if CPUID levels 0x80000002..4 are supported, this isn't used */ -static struct cpu_model_info cpu_models[] __initdata = { - { X86_VENDOR_INTEL, 6, - { "Pentium Pro A-step", "Pentium Pro", NULL, "Pentium II (Klamath)", - NULL, "Pentium II (Deschutes)", "Mobile Pentium II", - "Pentium III (Katmai)", "Pentium III (Coppermine)", NULL, - "Pentium III (Cascades)", NULL, NULL, NULL, NULL }}, - { X86_VENDOR_AMD, 6, /* Is this this really necessary?? */ - { "Athlon", "Athlon", - "Athlon", NULL, "Athlon", NULL, - NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL }} -}; - -/* Look up CPU names by table lookup. */ -static char __init *table_lookup_model(struct cpuinfo_x86 *c) -{ - struct cpu_model_info *info = cpu_models; - int i; - - if ( c->x86_model >= 16 ) - return NULL; /* Range check */ - - for ( i = 0 ; i < sizeof(cpu_models)/sizeof(struct cpu_model_info) ; i++ ) { - if ( info->vendor == c->x86_vendor && - info->family == c->x86 ) { - return info->model_names[c->x86_model]; - } - info++; - } - return NULL; /* Not found */ -} - - - -/* Standard macro to see if a specific flag is changeable */ -static inline int flag_is_changeable_p(u32 flag) -{ - u32 f1, f2; - - asm("pushfl\n\t" - "pushfl\n\t" - "popl %0\n\t" - "movl %0,%1\n\t" - "xorl %2,%0\n\t" - "pushl %0\n\t" - "popfl\n\t" - "pushfl\n\t" - "popl %0\n\t" - "popfl\n\t" - : "=&r" (f1), "=&r" (f2) - : "ir" (flag)); - - return ((f1^f2) & flag) != 0; -} - - -/* Probe for the CPUID instruction */ -static int __init have_cpuid_p(void) -{ - return flag_is_changeable_p(X86_EFLAGS_ID); -} - - - -#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) -unsigned char eddnr; -struct edd_info edd[EDDMAXNR]; -unsigned int edd_disk80_sig; -/** - * copy_edd() - Copy the BIOS EDD information - * from empty_zero_page into a safe place. - * - */ -static inline void copy_edd(void) -{ - eddnr = EDD_NR; - memcpy(edd, EDD_BUF, sizeof(edd)); - edd_disk80_sig = DISK80_SIGNATURE_BUFFER; -} -#else -static inline void copy_edd(void) {} -#endif - -/* - * This does the hard work of actually picking apart the CPU stuff... - */ -void __init identify_cpu(struct cpuinfo_x86 *c) -{ - int junk, i; - u32 xlvl, tfms; - - c->loops_per_jiffy = loops_per_jiffy; - c->x86_cache_size = -1; - c->x86_vendor = X86_VENDOR_UNKNOWN; - c->cpuid_level = -1; /* CPUID not detected */ - c->x86_model = c->x86_mask = 0; /* So far unknown... */ - c->x86_vendor_id[0] = '\0'; /* Unset */ - c->x86_model_id[0] = '\0'; /* Unset */ - memset(&c->x86_capability, 0, sizeof c->x86_capability); - c->hard_math = 1; - - if ( !have_cpuid_p() ) { - panic("Processor must support CPUID\n"); - } else { - /* CPU does have CPUID */ - - /* Get vendor name */ - cpuid(0x00000000, &c->cpuid_level, - (int *)&c->x86_vendor_id[0], - (int *)&c->x86_vendor_id[8], - (int *)&c->x86_vendor_id[4]); - - get_cpu_vendor(c); - /* Initialize the standard set of capabilities */ - /* Note that the vendor-specific code below might override */ - - /* Intel-defined flags: level 0x00000001 */ - if ( c->cpuid_level >= 0x00000001 ) { - u32 capability, excap; - cpuid(0x00000001, &tfms, &junk, &excap, &capability); - c->x86_capability[0] = capability; - c->x86_capability[4] = excap; - c->x86 = (tfms >> 8) & 15; - c->x86_model = (tfms >> 4) & 15; - if (c->x86 == 0xf) { - c->x86 += (tfms >> 20) & 0xff; - c->x86_model += ((tfms >> 16) & 0xF) << 4; - } - c->x86_mask = tfms & 15; - } else { - /* Have CPUID level 0 only - unheard of */ - c->x86 = 4; - } - - /* AMD-defined flags: level 0x80000001 */ - xlvl = cpuid_eax(0x80000000); - if ( (xlvl & 0xffff0000) == 0x80000000 ) { - if ( xlvl >= 0x80000001 ) - c->x86_capability[1] = cpuid_edx(0x80000001); - if ( xlvl >= 0x80000004 ) - get_model_name(c); /* Default name */ - } - - /* Transmeta-defined flags: level 0x80860001 */ - xlvl = cpuid_eax(0x80860000); - if ( (xlvl & 0xffff0000) == 0x80860000 ) { - if ( xlvl >= 0x80860001 ) - c->x86_capability[2] = cpuid_edx(0x80860001); - } - } - - printk(KERN_DEBUG "CPU: Before vendor init, caps: %08x %08x %08x, vendor = %d\n", - c->x86_capability[0], - c->x86_capability[1], - c->x86_capability[2], - c->x86_vendor); - - /* - * Vendor-specific initialization. In this section we - * canonicalize the feature flags, meaning if there are - * features a certain CPU supports which CPUID doesn't - * tell us, CPUID claiming incorrect flags, or other bugs, - * we handle them here. - * - * At the end of this section, c->x86_capability better - * indicate the features this CPU genuinely supports! - */ - switch ( c->x86_vendor ) { - case X86_VENDOR_AMD: - init_amd(c); - break; - - case X86_VENDOR_INTEL: - init_intel(c); - break; - - case X86_VENDOR_CENTAUR: - init_centaur(c); - break; - - default: - printk("Unsupported CPU vendor (%d) -- please report!\n", - c->x86_vendor); - } - - printk(KERN_DEBUG "CPU: After vendor init, caps: %08x %08x %08x %08x\n", - c->x86_capability[0], - c->x86_capability[1], - c->x86_capability[2], - c->x86_capability[3]); - - - /* If the model name is still unset, do table lookup. */ - if ( !c->x86_model_id[0] ) { - char *p; - p = table_lookup_model(c); - if ( p ) - strcpy(c->x86_model_id, p); - else - /* Last resort... */ - sprintf(c->x86_model_id, "%02x/%02x", - c->x86_vendor, c->x86_model); - } - - /* Now the feature flags better reflect actual CPU features! */ - - printk(KERN_DEBUG "CPU: After generic, caps: %08x %08x %08x %08x\n", - c->x86_capability[0], - c->x86_capability[1], - c->x86_capability[2], - c->x86_capability[3]); - - /* - * On SMP, boot_cpu_data holds the common feature set between - * all CPUs; so make sure that we indicate which features are - * common between the CPUs. The first time this routine gets - * executed, c == &boot_cpu_data. - */ - if ( c != &boot_cpu_data ) { - /* AND the already accumulated flags with these */ - for ( i = 0 ; i < NCAPINTS ; i++ ) - boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; - } - - printk(KERN_DEBUG "CPU: Common caps: %08x %08x %08x %08x\n", - boot_cpu_data.x86_capability[0], - boot_cpu_data.x86_capability[1], - boot_cpu_data.x86_capability[2], - boot_cpu_data.x86_capability[3]); -} - - -/* These need to match <asm/processor.h> */ -static char *cpu_vendor_names[] __initdata = { - "Intel", "Cyrix", "AMD", "UMC", "NexGen", "Centaur", "Rise", "Transmeta" }; - - -void __init print_cpu_info(struct cpuinfo_x86 *c) -{ - char *vendor = NULL; - - if (c->x86_vendor < sizeof(cpu_vendor_names)/sizeof(char *)) - vendor = cpu_vendor_names[c->x86_vendor]; - else if (c->cpuid_level >= 0) - vendor = c->x86_vendor_id; - - if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor))) - printk("%s ", vendor); - - if (!c->x86_model_id[0]) - printk("%d86", c->x86); - else - printk("%s", c->x86_model_id); - - if (c->x86_mask || c->cpuid_level >= 0) - printk(" stepping %02x\n", c->x86_mask); - else - printk("\n"); -} - -/* - * Get CPU information for use by the procfs. - */ -static int show_cpuinfo(struct seq_file *m, void *v) -{ - /* - * These flag bits must match the definitions in <asm/cpufeature.h>. - * NULL means this bit is undefined or reserved; either way it doesn't - * have meaning as far as Linux is concerned. Note that it's important - * to realize there is a difference between this table and CPUID -- if - * applications want to get the raw CPUID data, they should access - * /dev/cpu/<cpu_nr>/cpuid instead. - */ - static char *x86_cap_flags[] = { - /* Intel-defined */ - "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", - "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov", - "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx", - "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe", - - /* AMD-defined */ - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL, - NULL, NULL, NULL, "mp", NULL, NULL, "mmxext", NULL, - NULL, NULL, NULL, NULL, NULL, "lm", "3dnowext", "3dnow", - - /* Transmeta-defined */ - "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - - /* Other (Linux-defined) */ - "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr", - NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - - /* Intel-defined (#2) */ - "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "tm2", - "est", NULL, "cid", NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - - /* VIA/Cyrix/Centaur-defined */ - NULL, NULL, "xstore", NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, - - }; - struct cpuinfo_x86 *c = v; - int i, n = c - cpu_data; - int fpu_exception; - -#ifdef CONFIG_SMP - if (!(cpu_online_map & (1<<n))) - return 0; -#endif - seq_printf(m, "processor\t: %d\n" - "vendor_id\t: %s\n" - "cpu family\t: %d\n" - "model\t\t: %d\n" - "model name\t: %s\n", - n, - c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", - c->x86, - c->x86_model, - c->x86_model_id[0] ? c->x86_model_id : "unknown"); - - if (c->x86_mask || c->cpuid_level >= 0) - seq_printf(m, "stepping\t: %d\n", c->x86_mask); - else - seq_printf(m, "stepping\t: unknown\n"); - - if ( test_bit(X86_FEATURE_TSC, &c->x86_capability) ) { - seq_printf(m, "cpu MHz\t\t: %lu.%03lu\n", - cpu_khz / 1000, (cpu_khz % 1000)); - } - - /* Cache size */ - if (c->x86_cache_size >= 0) - seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); - - /* We use exception 16 if we have hardware math and we've either seen it or the CPU claims it is internal */ - fpu_exception = c->hard_math && (ignore_irq13 || cpu_has_fpu); - seq_printf(m, "fdiv_bug\t: %s\n" - "hlt_bug\t\t: %s\n" - "f00f_bug\t: %s\n" - "coma_bug\t: %s\n" - "fpu\t\t: %s\n" - "fpu_exception\t: %s\n" - "cpuid level\t: %d\n" - "wp\t\t: %s\n" - "flags\t\t:", - c->fdiv_bug ? "yes" : "no", - c->hlt_works_ok ? "no" : "yes", - c->f00f_bug ? "yes" : "no", - c->coma_bug ? "yes" : "no", - c->hard_math ? "yes" : "no", - fpu_exception ? "yes" : "no", - c->cpuid_level, - c->wp_works_ok ? "yes" : "no"); - - for ( i = 0 ; i < 32*NCAPINTS ; i++ ) - if ( test_bit(i, &c->x86_capability) && - x86_cap_flags[i] != NULL ) - seq_printf(m, " %s", x86_cap_flags[i]); - - seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n", - c->loops_per_jiffy/(500000/HZ), - (c->loops_per_jiffy/(5000/HZ)) % 100); - return 0; -} - -static void *c_start(struct seq_file *m, loff_t *pos) -{ - return *pos < NR_CPUS ? cpu_data + *pos : NULL; -} -static void *c_next(struct seq_file *m, void *v, loff_t *pos) -{ - ++*pos; - return c_start(m, pos); -} -static void c_stop(struct seq_file *m, void *v) -{ -} -struct seq_operations cpuinfo_op = { - start: c_start, - next: c_next, - stop: c_stop, - show: show_cpuinfo, -}; - -unsigned long cpu_initialized __initdata = 0; - -/* - * cpu_init() initializes state that is per-CPU. Some data is already - * initialized (naturally) in the bootstrap process, such as the GDT - * and IDT. We reload them nevertheless, this function acts as a - * 'CPU state barrier', nothing should get across. - */ -void __init cpu_init (void) -{ - int nr = smp_processor_id(); - - if (test_and_set_bit(nr, &cpu_initialized)) { - printk(KERN_WARNING "CPU#%d already initialized!\n", nr); - for (;;) __sti(); - } - printk(KERN_INFO "Initializing CPU#%d\n", nr); - - /* - * set up and load the per-CPU TSS and LDT - */ - atomic_inc(&init_mm.mm_count); - current->active_mm = &init_mm; - if(current->mm) - BUG(); - enter_lazy_tlb(&init_mm, current, nr); - - HYPERVISOR_stack_switch(__KERNEL_DS, current->thread.esp0); - - load_LDT(&init_mm.context); - - /* Force FPU initialization. */ - current->flags &= ~PF_USEDFPU; - current->used_math = 0; - stts(); -} |