[RFC PATCH 17/17] ARM: kernel: save/restore build infrastructure

[Lorenzo Pieralisi]

This patch adds the required Kconfig and Makefile entries to
enable and compile common idle code for ARM kernel.

Common idle code depends on CPU_PM platform notifiers to trigger
save/restore of kernel subsystems like PMU, VFP, GIC.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
---
 arch/arm/Kconfig         |   11 +++++++++++
 arch/arm/kernel/Makefile |    4 ++++
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 356f266..5b670bd 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1992,6 +1992,17 @@ config VFP
 
 	  Say N if your target does not have VFP hardware.
 
+config CONTEXT_SR
+	bool "Save/Restore code support for CPU/Cluster Power Management"
+	depends on CPU_V7 && CPU_PM
+	help
+	  Say Y to include Save/Restore code in the kernel. This provides
+	  generic infrastructure to put the code in dormant/shutdown mode
+	  and save/restore the required system state inclusive of L2 cache
+	  logic.
+
+	  Say N if your target does not have Power Management hardware.
+
 config VFPv3
 	bool
 	depends on VFP
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 8b42d58..ac931f1 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -49,6 +49,10 @@ obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o
 obj-$(CONFIG_SWP_EMULATE)	+= swp_emulate.o
 CFLAGS_swp_emulate.o		:= -Wa,-march=armv7-a
 obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
+obj-$(CONFIG_CONTEXT_SR)	+=	lb_lock.o sr_api.o sr_mapping.o \
+					sr_entry.o  sr_arch.o  sr_context.o \
+					sr_platform.o sr_power.o reset_v7.o \
+					sr_v7_helpers.o
 
 obj-$(CONFIG_CRUNCH)		+= crunch.o crunch-bits.o
 AFLAGS_crunch-bits.o		:= -Wa,-mcpu=ep9312
-- 
1.7.4.4