[PATCH v3 2/3] ARM: cache: Allow SPL to build cache-pl310.c

[Philip Oberfichtner]

Introduce the new Kconfig symbol CONFIG_SPL_SYS_L2_PL310 to allow the
SPL to build cache-pl310.c.

Before this commit, the SPL could enable the PL310 L2 cache [1], but the
cache maintenance functions from cache-pl310.c were only useable for
non-SPL builds.

After enabling the cache one must be able to flush it, too. Thus this
commit allows cache-pl310.c to be included in the SPL build.

[1] See for example arch/arm/mach-imx/cache.c: v7_outer_cache_enable()

Signed-off-by: Philip Oberfichtner <pro at denx.de>
---

Changes in v3:
        - Introduce CONFIG_SPL_SYS_L2_PL310

 arch/arm/Kconfig      | 5 +++++
 arch/arm/lib/Makefile | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dde06bdd96..0bc03c921a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -493,6 +493,11 @@ config SYS_L2_PL310
 	help
 	  Enable support for ARM PL310 L2 cache controller in U-Boot
 
+config SPL_SYS_L2_PL310
+	bool "ARM PL310 L2 cache controller in SPL"
+	help
+	  Enable support for ARM PL310 L2 cache controller in SPL
+
 config SYS_L2CACHE_OFF
 	bool "L2cache off"
 	help
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index c603fe61bc..d137b4bf0f 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -33,7 +33,6 @@ obj-$(CONFIG_OF_LIBFDT) += bootm-fdt.o
 obj-$(CONFIG_CMD_BOOTI) += bootm.o image.o
 obj-$(CONFIG_CMD_BOOTM) += bootm.o
 obj-$(CONFIG_CMD_BOOTZ) += bootm.o zimage.o
-obj-$(CONFIG_SYS_L2_PL310) += cache-pl310.o
 else
 obj-$(CONFIG_$(SPL_TPL_)FRAMEWORK) += spl.o
 obj-$(CONFIG_SPL_FRAMEWORK) += zimage.o
@@ -46,6 +45,7 @@ else
 obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMSET) += memset.o
 obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMCPY) += memcpy.o
 endif
+obj-$(CONFIG_$(SPL_TPL_)SYS_L2_PL310) += cache-pl310.o
 obj-$(CONFIG_$(SPL_TPL_)SEMIHOSTING) += semihosting.o
 
 ifneq ($(filter y,$(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) $(CONFIG_SAVE_PREV_BL_FDT_ADDR)),)
-- 
2.37.1