Merge branch 'linus' into core/futexes

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/x86/include/asm/numaq/wakecpu.h b/arch/x86/include/asm/numaq/wakecpu.h
new file mode 100644
index 000000000000..c577bda5b1c5
--- /dev/null
+++ b/arch/x86/include/asm/numaq/wakecpu.h
@@ -0,0 +1,43 @@
+#ifndef __ASM_NUMAQ_WAKECPU_H
+#define __ASM_NUMAQ_WAKECPU_H
+
+/* This file copes with machines that wakeup secondary CPUs by NMIs */
+
+#define WAKE_SECONDARY_VIA_NMI
+
+#define TRAMPOLINE_LOW phys_to_virt(0x8)
+#define TRAMPOLINE_HIGH phys_to_virt(0xa)
+
+#define boot_cpu_apicid boot_cpu_logical_apicid
+
+/* We don't do anything here because we use NMI's to boot instead */
+static inline void wait_for_init_deassert(atomic_t *deassert)
+{
+}
+
+/*
+ * Because we use NMIs rather than the INIT-STARTUP sequence to
+ * bootstrap the CPUs, the APIC may be in a weird state. Kick it.
+ */
+static inline void smp_callin_clear_local_apic(void)
+{
+	clear_local_APIC();
+}
+
+static inline void store_NMI_vector(unsigned short *high, unsigned short *low)
+{
+	printk("Storing NMI vector\n");
+	*high = *((volatile unsigned short *) TRAMPOLINE_HIGH);
+	*low = *((volatile unsigned short *) TRAMPOLINE_LOW);
+}
+
+static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
+{
+	printk("Restoring NMI vector\n");
+	*((volatile unsigned short *) TRAMPOLINE_HIGH) = *high;
+	*((volatile unsigned short *) TRAMPOLINE_LOW) = *low;
+}
+
+#define inquire_remote_apic(apicid) {}
+
+#endif /* __ASM_NUMAQ_WAKECPU_H */