1 files changed, 61 insertions, 0 deletions

diff --git a/arch/x86/include/asm/smpboot_hooks.h b/arch/x86/include/asm/smpboot_hooks.h
new file mode 100644
index 000000000000..1def60114906
--- /dev/null
+++ b/arch/x86/include/asm/smpboot_hooks.h
@@ -0,0 +1,61 @@
+/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
+ * which needs to alter them. */
+
+static inline void smpboot_clear_io_apic_irqs(void)
+{
+#ifdef CONFIG_X86_IO_APIC
+        io_apic_irqs = 0;
+#endif
+}
+
+static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
+{
+        CMOS_WRITE(0xa, 0xf);
+        local_flush_tlb();
+        pr_debug("1.\n");
+        *((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_high)) =
+                                                                 start_eip >> 4;
+        pr_debug("2.\n");
+        *((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_low)) =
+                                                         start_eip & 0xf;
+        pr_debug("3.\n");
+}
+
+static inline void smpboot_restore_warm_reset_vector(void)
+{
+        /*
+         * Install writable page 0 entry to set BIOS data area.
+         */
+        local_flush_tlb();
+
+        /*
+         * Paranoid:  Set warm reset code and vector here back
+         * to default values.
+         */
+        CMOS_WRITE(0, 0xf);
+
+        *((volatile long *)phys_to_virt(apic->trampoline_phys_low)) = 0;
+}
+
+static inline void __init smpboot_setup_io_apic(void)
+{
+#ifdef CONFIG_X86_IO_APIC
+        /*
+         * Here we can be sure that there is an IO-APIC in the system. Let's
+         * go and set it up:
+         */
+        if (!skip_ioapic_setup && nr_ioapics)
+                setup_IO_APIC();
+        else {
+                nr_ioapics = 0;
+                localise_nmi_watchdog();
+        }
+#endif
+}
+
+static inline void smpboot_clear_io_apic(void)
+{
+#ifdef CONFIG_X86_IO_APIC
+        nr_ioapics = 0;
+#endif
+}