95492e4646
make the TSC synchronization code more robust, and unify it between x86_64 and i386. The biggest change is the removal of the 'fix up TSCs' code on x86_64 and i386, in some rare cases it was /causing/ time-warps on SMP systems. The new code only checks for TSC asynchronity - and if it can prove a time-warp (if it can observe the TSC going backwards when going from one CPU to another within a critical section), then the TSC clock-source is turned off. The TSC synchronization-checking code also got moved into a separate file. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
#ifndef _ASM_X8664_PROTO_H
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#define _ASM_X8664_PROTO_H 1
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#include <asm/ldt.h>
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/* misc architecture specific prototypes */
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struct cpuinfo_x86;
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struct pt_regs;
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extern void start_kernel(void);
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extern void pda_init(int);
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extern void zap_low_mappings(int cpu);
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extern void early_idt_handler(void);
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extern void mcheck_init(struct cpuinfo_x86 *c);
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#ifdef CONFIG_MTRR
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extern void mtrr_ap_init(void);
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extern void mtrr_bp_init(void);
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#else
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#define mtrr_ap_init() do {} while (0)
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#define mtrr_bp_init() do {} while (0)
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#endif
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extern void init_memory_mapping(unsigned long start, unsigned long end);
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extern void system_call(void);
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extern int kernel_syscall(void);
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extern void syscall_init(void);
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extern void ia32_syscall(void);
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extern void ia32_cstar_target(void);
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extern void ia32_sysenter_target(void);
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extern void config_acpi_tables(void);
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extern void ia32_syscall(void);
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extern int pmtimer_mark_offset(void);
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extern void pmtimer_resume(void);
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extern void pmtimer_wait(unsigned);
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extern unsigned int do_gettimeoffset_pm(void);
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#ifdef CONFIG_X86_PM_TIMER
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extern u32 pmtmr_ioport;
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#else
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#define pmtmr_ioport 0
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#endif
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extern unsigned long long monotonic_base;
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extern int sysctl_vsyscall;
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extern int nohpet;
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extern unsigned long vxtime_hz;
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extern void time_init_gtod(void);
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extern void early_printk(const char *fmt, ...) __attribute__((format(printf,1,2)));
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extern void early_identify_cpu(struct cpuinfo_x86 *c);
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extern int k8_scan_nodes(unsigned long start, unsigned long end);
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extern void numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn);
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extern unsigned long numa_free_all_bootmem(void);
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extern void reserve_bootmem_generic(unsigned long phys, unsigned len);
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extern void load_gs_index(unsigned gs);
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extern void stop_timer_interrupt(void);
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extern void main_timer_handler(void);
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extern unsigned long end_pfn_map;
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extern void show_trace(struct task_struct *, struct pt_regs *, unsigned long * rsp);
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extern void show_registers(struct pt_regs *regs);
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extern void exception_table_check(void);
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extern void acpi_reserve_bootmem(void);
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extern void swap_low_mappings(void);
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extern void __show_regs(struct pt_regs * regs);
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extern void show_regs(struct pt_regs * regs);
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extern void syscall32_cpu_init(void);
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extern void setup_node_bootmem(int nodeid, unsigned long start, unsigned long end);
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extern void early_quirks(void);
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extern void quirk_intel_irqbalance(void);
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extern void check_efer(void);
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extern int unhandled_signal(struct task_struct *tsk, int sig);
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extern void select_idle_routine(const struct cpuinfo_x86 *c);
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extern unsigned long table_start, table_end;
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extern int exception_trace;
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extern unsigned cpu_khz;
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extern void no_iommu_init(void);
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extern int force_iommu, no_iommu;
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extern int iommu_detected;
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#ifdef CONFIG_IOMMU
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extern void gart_iommu_init(void);
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extern void gart_parse_options(char *);
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extern void iommu_hole_init(void);
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extern int fallback_aper_order;
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extern int fallback_aper_force;
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extern int iommu_aperture;
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extern int iommu_aperture_allowed;
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extern int iommu_aperture_disabled;
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extern int fix_aperture;
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#else
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#define iommu_aperture 0
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#define iommu_aperture_allowed 0
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#endif
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extern int reboot_force;
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extern int notsc_setup(char *);
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extern int timer_over_8254;
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extern int gsi_irq_sharing(int gsi);
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extern void smp_local_timer_interrupt(void);
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long do_arch_prctl(struct task_struct *task, int code, unsigned long addr);
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#define round_up(x,y) (((x) + (y) - 1) & ~((y)-1))
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#define round_down(x,y) ((x) & ~((y)-1))
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#endif
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