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| author |   Yinghai Lu <yhlu.kernel@gmail.com> | 2008-08-24 02:01:50 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:53:02 +0200 |
| commit | fa2bd35a8d5c88c03b638c72daf7f38a132d0e8c (patch) | |
| tree | a83e22fef3a1b71df13d5f5232eb3089a429f047 /arch/x86/kernel/apic_64.c | |
| parent | x86: make apic_32/64.c more like (diff) | |
| download | linux-dev-fa2bd35a8d5c88c03b638c72daf7f38a132d0e8c.tar.xz linux-dev-fa2bd35a8d5c88c03b638c72daf7f38a132d0e8c.zip | |
x86: merge APIC_init_uniprocessor
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic_64.c')
| -rw-r--r-- | arch/x86/kernel/apic_64.c | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c index dca6c246e731..16a30c22b07c 100644 --- a/arch/x86/kernel/apic_64.c +++ b/arch/x86/kernel/apic_64.c @@ -1351,6 +1351,7 @@ int apic_version[MAX_APICS]; int __init APIC_init_uniprocessor(void) { +#ifdef CONFIG_X86_64 if (disable_apic) { printk(KERN_INFO "Apic disabled\n"); return -1; @@ -1360,37 +1361,78 @@ int __init APIC_init_uniprocessor(void) printk(KERN_INFO "Apic disabled by BIOS\n"); return -1; } +#else + if (!smp_found_config && !cpu_has_apic) + return -1; + + /* + * Complain if the BIOS pretends there is one. + */ + if (!cpu_has_apic && + APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) { + printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n", + boot_cpu_physical_apicid); + clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); + return -1; + } +#endif + #ifdef HAVE_X2APIC enable_IR_x2apic(); #endif +#ifdef CONFIG_X86_64 setup_apic_routing(); +#endif verify_local_APIC(); - connect_bsp_APIC(); - physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map); +#ifdef CONFIG_X86_64 apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid)); - +#else + /* + * Hack: In case of kdump, after a crash, kernel might be booting + * on a cpu with non-zero lapic id. But boot_cpu_physical_apicid + * might be zero if read from MP tables. Get it from LAPIC. + */ +# ifdef CONFIG_CRASH_DUMP + boot_cpu_physical_apicid = read_apic_id(); +# endif +#endif + physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map); setup_local_APIC(); +#ifdef CONFIG_X86_64 /* * Now enable IO-APICs, actually call clear_IO_APIC * We need clear_IO_APIC before enabling vector on BP */ if (!skip_ioapic_setup && nr_ioapics) enable_IO_APIC(); +#endif +#ifdef CONFIG_X86_IO_APIC if (!smp_found_config || skip_ioapic_setup || !nr_ioapics) +#endif localise_nmi_watchdog(); end_local_APIC_setup(); +#ifdef CONFIG_X86_IO_APIC if (smp_found_config && !skip_ioapic_setup && nr_ioapics) setup_IO_APIC(); +# ifdef CONFIG_X86_64 else nr_ioapics = 0; +# endif +#endif + +#ifdef CONFIG_X86_64 setup_boot_APIC_clock(); check_nmi_watchdog(); +#else + setup_boot_clock(); +#endif + return 0; } |