1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* defines for inline arch setup functions */
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#include <asm/fixmap.h>
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#include "cobalt.h"
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static inline void do_timer_interrupt_hook(struct pt_regs *regs)
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{
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/* Clear the interrupt */
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co_cpu_write(CO_CPU_STAT,co_cpu_read(CO_CPU_STAT) & ~CO_STAT_TIMEINTR);
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do_timer(regs);
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#ifndef CONFIG_SMP
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update_process_times(user_mode(regs));
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#endif
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/*
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* In the SMP case we use the local APIC timer interrupt to do the
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* profiling, except when we simulate SMP mode on a uniprocessor
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* system, in that case we have to call the local interrupt handler.
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*/
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#ifndef CONFIG_X86_LOCAL_APIC
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profile_tick(CPU_PROFILING, regs);
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#else
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if (!using_apic_timer)
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smp_local_timer_interrupt(regs);
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#endif
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}
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static inline int do_timer_overflow(int count)
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{
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int i;
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spin_lock(&i8259A_lock);
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/*
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* This is tricky when I/O APICs are used;
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* see do_timer_interrupt().
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*/
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i = inb(0x20);
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spin_unlock(&i8259A_lock);
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/* assumption about timer being IRQ0 */
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if (i & 0x01) {
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/*
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* We cannot detect lost timer interrupts ...
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* well, that's why we call them lost, don't we? :)
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* [hmm, on the Pentium and Alpha we can ... sort of]
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*/
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count -= LATCH;
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} else {
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printk("do_slow_gettimeoffset(): hardware timer problem?\n");
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}
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return count;
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}
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