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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 424 | giacomo | 1 | /* defines for inline arch setup functions */ |
| 2 | |||
| 3 | #include <asm/fixmap.h> |
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| 4 | #include "cobalt.h" |
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| 5 | |||
| 6 | static inline void do_timer_interrupt_hook(struct pt_regs *regs) |
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| 7 | { |
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| 8 | /* Clear the interrupt */ |
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| 9 | co_cpu_write(CO_CPU_STAT,co_cpu_read(CO_CPU_STAT) & ~CO_STAT_TIMEINTR); |
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| 10 | |||
| 11 | do_timer(regs); |
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| 12 | /* |
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| 13 | * In the SMP case we use the local APIC timer interrupt to do the |
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| 14 | * profiling, except when we simulate SMP mode on a uniprocessor |
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| 15 | * system, in that case we have to call the local interrupt handler. |
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| 16 | */ |
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| 17 | #ifndef CONFIG_X86_LOCAL_APIC |
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| 18 | x86_do_profile(regs); |
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| 19 | #else |
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| 20 | if (!using_apic_timer) |
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| 21 | smp_local_timer_interrupt(regs); |
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| 22 | #endif |
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| 23 | } |
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| 24 | |||
| 25 | static inline int do_timer_overflow(int count) |
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| 26 | { |
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| 27 | int i; |
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| 28 | |||
| 29 | spin_lock(&i8259A_lock); |
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| 30 | /* |
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| 31 | * This is tricky when I/O APICs are used; |
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| 32 | * see do_timer_interrupt(). |
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| 33 | */ |
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| 34 | i = inb(0x20); |
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| 35 | spin_unlock(&i8259A_lock); |
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| 36 | |||
| 37 | /* assumption about timer being IRQ0 */ |
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| 38 | if (i & 0x01) { |
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| 39 | /* |
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| 40 | * We cannot detect lost timer interrupts ... |
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| 41 | * well, that's why we call them lost, don't we? :) |
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| 42 | * [hmm, on the Pentium and Alpha we can ... sort of] |
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| 43 | */ |
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| 44 | count -= LATCH; |
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| 45 | } else { |
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| 46 | printk("do_slow_gettimeoffset(): hardware timer problem?\n"); |
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| 47 | } |
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| 48 | return count; |
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| 49 | } |