aboutsummaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorSuresh Siddha <suresh.b.siddha@intel.com>2008-07-10 11:16:58 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-12 08:45:06 +0200
commit6e1cb38a2aef7680975e71f23de187859ee8b158 (patch)
tree4044df869c6314dcdac700f3fdd3cc256cc9d3a7 /include
parent75c46fa61bc5b4ccd20a168ff325c58771248fcd (diff)
x64, x2apic/intr-remap: add x2apic support, including enabling interrupt-remapping
x2apic support. Interrupt-remapping must be enabled before enabling x2apic, this is needed to ensure that IO interrupts continue to work properly after the cpu mode is changed to x2apic(which uses 32bit extended physical/cluster apic id). On systems where apicid's are > 255, BIOS can handover the control to OS in x2apic mode. Or if the OS handover was in legacy xapic mode, check if it is capable of x2apic mode. And if we succeed in enabling Interrupt-remapping, then we can enable x2apic mode in the CPU. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: akpm@linux-foundation.org Cc: arjan@linux.intel.com Cc: andi@firstfloor.org Cc: ebiederm@xmission.com Cc: jbarnes@virtuousgeek.org Cc: steiner@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/apic.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86/apic.h b/include/asm-x86/apic.h
index aa746704a5c..129752dd252 100644
--- a/include/asm-x86/apic.h
+++ b/include/asm-x86/apic.h
@@ -100,6 +100,11 @@ extern void apic_wait_icr_idle(void);
extern u32 safe_apic_wait_icr_idle(void);
extern void apic_icr_write(u32 low, u32 id);
#else
+extern int x2apic, x2apic_preenabled;
+extern void check_x2apic(void);
+extern void enable_x2apic(void);
+extern void enable_IR_x2apic(void);
+extern void x2apic_icr_write(u32 low, u32 id);
struct apic_ops {
u32 (*read)(u32 reg);