projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* defines for inline arch setup functions */ |
| 2 | ||
| 3 | #include <asm/fixmap.h> | |
| 6c79d726 | 4 | #include <asm/i8259.h> |
| 1da177e4 LT |
5 | #include "cobalt.h" |
| 6 | ||
| 7 | static inline void do_timer_interrupt_hook(struct pt_regs *regs) | |
| 8 | { | |
| 9 | /* Clear the interrupt */ | |
| 10 | co_cpu_write(CO_CPU_STAT,co_cpu_read(CO_CPU_STAT) & ~CO_STAT_TIMEINTR); | |
| 11 | ||
| 12 | do_timer(regs); | |
| 13 | #ifndef CONFIG_SMP | |
| db753bdf | 14 | update_process_times(user_mode_vm(regs)); |
| 1da177e4 LT |
15 | #endif |
| 16 | /* | |
| 17 | * In the SMP case we use the local APIC timer interrupt to do the | |
| 18 | * profiling, except when we simulate SMP mode on a uniprocessor | |
| 19 | * system, in that case we have to call the local interrupt handler. | |
| 20 | */ | |
| 21 | #ifndef CONFIG_X86_LOCAL_APIC | |
| 22 | profile_tick(CPU_PROFILING, regs); | |
| 23 | #else | |
| 24 | if (!using_apic_timer) | |
| 25 | smp_local_timer_interrupt(regs); | |
| 26 | #endif | |
| 27 | } | |
| 28 | ||
| 29 | static inline int do_timer_overflow(int count) | |
| 30 | { | |
| 31 | int i; | |
| 32 | ||
| 33 | spin_lock(&i8259A_lock); | |
| 34 | /* | |
| 35 | * This is tricky when I/O APICs are used; | |
| 36 | * see do_timer_interrupt(). | |
| 37 | */ | |
| 38 | i = inb(0x20); | |
| 39 | spin_unlock(&i8259A_lock); | |
| 40 | ||
| 41 | /* assumption about timer being IRQ0 */ | |
| 42 | if (i & 0x01) { | |
| 43 | /* | |
| 44 | * We cannot detect lost timer interrupts ... | |
| 45 | * well, that's why we call them lost, don't we? :) | |
| 46 | * [hmm, on the Pentium and Alpha we can ... sort of] | |
| 47 | */ | |
| 48 | count -= LATCH; | |
| 49 | } else { | |
| 50 | printk("do_slow_gettimeoffset(): hardware timer problem?\n"); | |
| 51 | } | |
| 52 | return count; | |
| 53 | } |