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/* defines for inline arch setup functions */ #include <asm/fixmap.h> #include <asm/i8259.h> #include "cobalt.h" static inline void do_timer_interrupt_hook(struct pt_regs *regs) { /* Clear the interrupt */ co_cpu_write(CO_CPU_STAT,co_cpu_read(CO_CPU_STAT) & ~CO_STAT_TIMEINTR); do_timer(regs); #ifndef CONFIG_SMP update_process_times(user_mode(regs)); #endif /* * In the SMP case we use the local APIC timer interrupt to do the * profiling, except when we simulate SMP mode on a uniprocessor * system, in that case we have to call the local interrupt handler. */ #ifndef CONFIG_X86_LOCAL_APIC profile_tick(CPU_PROFILING, regs); #else if (!using_apic_timer) smp_local_timer_interrupt(regs); #endif } static inline int do_timer_overflow(int count) { int i; spin_lock(&i8259A_lock); /* * This is tricky when I/O APICs are used; * see do_timer_interrupt(). */ i = inb(0x20); spin_unlock(&i8259A_lock); /* assumption about timer being IRQ0 */ if (i & 0x01) { /* * We cannot detect lost timer interrupts ... * well, that's why we call them lost, don't we? :) * [hmm, on the Pentium and Alpha we can ... sort of] */ count -= LATCH; } else { printk("do_slow_gettimeoffset(): hardware timer problem?\n"); } return count; }