1 files changed, 52 insertions, 0 deletions

diff --git a/include/asm-i386/mach-visws/do_timer.h b/include/asm-i386/mach-visws/do_timer.h
new file mode 100644
index 000000000000..33acd50fd9a8
--- /dev/null
+++ b/include/asm-i386/mach-visws/do_timer.h
@@ -0,0 +1,52 @@
+/* defines for inline arch setup functions */
+
+#include <asm/fixmap.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;
+}