| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* defines for inline arch setup functions */ |
| 2 | |
| 3 | #include <asm/fixmap.h> |
| 4 | #include "cobalt.h" |
| 5 | |
| 6 | static inline void do_timer_interrupt_hook(struct pt_regs *regs) |
| 7 | { |
| 8 | /* Clear the interrupt */ |
| 9 | co_cpu_write(CO_CPU_STAT,co_cpu_read(CO_CPU_STAT) & ~CO_STAT_TIMEINTR); |
| 10 | |
| 11 | do_timer(regs); |
| 12 | #ifndef CONFIG_SMP |
| 13 | update_process_times(user_mode(regs)); |
| 14 | #endif |
| 15 | /* |
| 16 | * In the SMP case we use the local APIC timer interrupt to do the |
| 17 | * profiling, except when we simulate SMP mode on a uniprocessor |
| 18 | * system, in that case we have to call the local interrupt handler. |
| 19 | */ |
| 20 | #ifndef CONFIG_X86_LOCAL_APIC |
| 21 | profile_tick(CPU_PROFILING, regs); |
| 22 | #else |
| 23 | if (!using_apic_timer) |
| 24 | smp_local_timer_interrupt(regs); |
| 25 | #endif |
| 26 | } |
| 27 | |
| 28 | static inline int do_timer_overflow(int count) |
| 29 | { |
| 30 | int i; |
| 31 | |
| 32 | spin_lock(&i8259A_lock); |
| 33 | /* |
| 34 | * This is tricky when I/O APICs are used; |
| 35 | * see do_timer_interrupt(). |
| 36 | */ |
| 37 | i = inb(0x20); |
| 38 | spin_unlock(&i8259A_lock); |
| 39 | |
| 40 | /* assumption about timer being IRQ0 */ |
| 41 | if (i & 0x01) { |
| 42 | /* |
| 43 | * We cannot detect lost timer interrupts ... |
| 44 | * well, that's why we call them lost, don't we? :) |
| 45 | * [hmm, on the Pentium and Alpha we can ... sort of] |
| 46 | */ |
| 47 | count -= LATCH; |
| 48 | } else { |
| 49 | printk("do_slow_gettimeoffset(): hardware timer problem?\n"); |
| 50 | } |
| 51 | return count; |
| 52 | } |