path: root/include/linux/irqchip/arm-gic.h
diff options
authorNicolas Pitre <nicolas.pitre@linaro.org>2012-04-12 01:40:31 -0400
committerNicolas Pitre <nicolas.pitre@linaro.org>2013-06-19 16:43:43 -0400
commitd844e2c88cee59c8cc403dc7e6be8096e304ebfa (patch)
tree05f941e3ed8fcec8fc3980537821f15685e208f5 /include/linux/irqchip/arm-gic.h
parent7d132055814ef17a6c7b69f342244c410a5e000f (diff)
ARM: gic: add CPU migration support
This is required by the big.LITTLE switcher code. The gic_migrate_target() changes the CPU interface mapping for the current CPU to redirect SGIs to the specified interface, and it also updates the target CPU for each interrupts to that CPU interface if they were targeting the current interface. Finally, pending SGIs for the current CPU are forwarded to the new interface. Because Linux does not use it, the SGI source information for the forwarded SGIs is not preserved. Neither is the source information for the SGIs sent by the current CPU to other CPUs adjusted to match the new CPU interface mapping. The required registers are banked so only the target CPU could do it. Signed-off-by: Nicolas Pitre <nico@linaro.org>
Diffstat (limited to 'include/linux/irqchip/arm-gic.h')
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index 3e203eb23cc..40bfcac9594 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -31,6 +31,8 @@
#define GIC_DIST_TARGET 0x800
#define GIC_DIST_CONFIG 0xc00
#define GIC_DIST_SOFTINT 0xf00
#define GICH_HCR 0x0
#define GICH_VTR 0x4
@@ -73,6 +75,8 @@ static inline void gic_init(unsigned int nr, int start,
gic_init_bases(nr, start, dist, cpu, 0, NULL);
+void gic_migrate_target(unsigned int new_cpu_id);
#endif /* __ASSEMBLY */