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Diffstat (limited to 'include/asm-x86/mach-default/smpboot_hooks.h')
-rw-r--r--include/asm-x86/mach-default/smpboot_hooks.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/asm-x86/mach-default/smpboot_hooks.h b/include/asm-x86/mach-default/smpboot_hooks.h
new file mode 100644
index 000000000000..7f45f6311059
--- /dev/null
+++ b/include/asm-x86/mach-default/smpboot_hooks.h
@@ -0,0 +1,44 @@
+/* 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)
+{
+ io_apic_irqs = 0;
+}
+
+static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
+{
+ CMOS_WRITE(0xa, 0xf);
+ local_flush_tlb();
+ Dprintk("1.\n");
+ *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4;
+ Dprintk("2.\n");
+ *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
+ Dprintk("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(0x467)) = 0;
+}
+
+static inline void smpboot_setup_io_apic(void)
+{
+ /*
+ * 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();
+}