ARM: ARMv7-M: Allow the building of new kernel port

This patch modifies the required Kconfig and Makefile files to allow the
building of kernel for Cortex-M3.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Jonathan Austin <jonathan.austin@arm.com>
Tested-by: Jonathan Austin <jonathan.austin@arm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

2 files changed, 22 insertions, 1 deletions

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index cb812a13e299..cce78b070825 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -397,6 +397,15 @@ config CPU_V7
         select CPU_PABRT_V7
         select CPU_TLB_V7 if MMU
 
+# ARMv7M
+config CPU_V7M
+        bool
+        select CPU_32v7M
+        select CPU_ABRT_NOMMU
+        select CPU_CACHE_NOP
+        select CPU_PABRT_LEGACY
+        select CPU_THUMBONLY
+
 config CPU_THUMBONLY
         bool
         # There are no CPUs available with MMU that don't implement an ARM ISA:
@@ -441,6 +450,9 @@ config CPU_32v6K
 config CPU_32v7
         bool
 
+config CPU_32v7M
+        bool
+
 # The abort model
 config CPU_ABRT_NOMMU
         bool
@@ -494,6 +506,9 @@ config CPU_CACHE_V6
 config CPU_CACHE_V7
         bool
 
+config CPU_CACHE_NOP
+        bool
+
 config CPU_CACHE_VIVT
         bool
 
@@ -616,7 +631,11 @@ config ARCH_DMA_ADDR_T_64BIT
 
 config ARM_THUMB
         bool "Support Thumb user binaries" if !CPU_THUMBONLY
-        depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || CPU_V7 || CPU_FEROCEON
+        depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || \
+                CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || \
+                CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
+                CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || \
+                CPU_V7 || CPU_FEROCEON || CPU_V7M
         default y
         help
           Say Y if you want to include kernel support for running user space
diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index 4e333fa2756f..317b57559340 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_CPU_CACHE_V4WB)	+= cache-v4wb.o
 obj-$(CONFIG_CPU_CACHE_V6)      += cache-v6.o
 obj-$(CONFIG_CPU_CACHE_V7)      += cache-v7.o
 obj-$(CONFIG_CPU_CACHE_FA)      += cache-fa.o
+obj-$(CONFIG_CPU_CACHE_NOP)     += cache-nop.o
 
 AFLAGS_cache-v6.o       :=-Wa,-march=armv6
 AFLAGS_cache-v7.o       :=-Wa,-march=armv7-a
@@ -88,6 +89,7 @@ obj-$(CONFIG_CPU_FEROCEON)	+= proc-feroceon.o
 obj-$(CONFIG_CPU_V6)            += proc-v6.o
 obj-$(CONFIG_CPU_V6K)           += proc-v6.o
 obj-$(CONFIG_CPU_V7)            += proc-v7.o
+obj-$(CONFIG_CPU_V7M)           += proc-v7m.o
 
 AFLAGS_proc-v6.o        :=-Wa,-march=armv6
 AFLAGS_proc-v7.o        :=-Wa,-march=armv7-a