aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/include/asm/smpboot_hooks.h
diff options
context:
space:
mode:
authorSteven Rostedt <srostedt@redhat.com>2009-03-12 21:12:46 -0400
committerSteven Rostedt <srostedt@redhat.com>2009-03-12 21:12:46 -0400
commit51b643b404827d8fde60d7953773a42d46ca87e0 (patch)
treeae71fcbd8b3640b68fc11e1dca620a8ee96bac5f /arch/x86/include/asm/smpboot_hooks.h
parent554f786e284a6ce859d51f62240d615603944c8e (diff)
parent480c93df5b99699390f93a7024c9f60d09da0e96 (diff)
Merge branch 'tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip into trace/tip/tracing/ftrace-merge
Diffstat (limited to 'arch/x86/include/asm/smpboot_hooks.h')
-rw-r--r--arch/x86/include/asm/smpboot_hooks.h61
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 00000000000..1def6011490
--- /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
+}