[U-Boot] [RFC PATCH 1/2] ARM: cache: Introduce weak dram_bank_setup function

[R Sricharan]

Introduce a weak version of dram_bank_setup function
to allow a platform specific redefinition.

This is used in the subsequent patch to setup dram region
without 'XN' attribute in order to enable the region
under client permissions.

Signed-off-by: R Sricharan <r.sricharan at ti.com>
Cc: Vincent Stehle <v-stehle at ti.com>
Cc: Tom Rini <trini at ti.com>
---
 arch/arm/include/asm/cache.h |    1 +
 arch/arm/lib/cache-cp15.c    |    7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/cache.h b/arch/arm/include/asm/cache.h
index eef6a5a..93811d2 100644
--- a/arch/arm/include/asm/cache.h
+++ b/arch/arm/include/asm/cache.h
@@ -42,6 +42,7 @@ static inline void invalidate_l2_cache(void)
 void l2_cache_enable(void);
 void l2_cache_disable(void);
 
+void dram_bank_mmu_setup(int bank);
 /*
  * The current upper bound for ARM L1 data cache line sizes is 64 bytes.  We
  * use that value for aligning DMA buffers unless the board config has specified
diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c
index 6edf815..843078e 100644
--- a/arch/arm/lib/cache-cp15.c
+++ b/arch/arm/lib/cache-cp15.c
@@ -23,6 +23,8 @@
 
 #include <common.h>
 #include <asm/system.h>
+#include <asm/cache.h>
+#include <linux/compiler.h>
 
 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
 
@@ -77,7 +79,7 @@ void mmu_set_region_dcache_behaviour(u32 start, int size,
 	mmu_page_table_flush((u32)&page_table[start], (u32)&page_table[end]);
 }
 
-static inline void dram_bank_mmu_setup(int bank)
+void __dram_bank_mmu_setup(int bank)
 {
 	bd_t *bd = gd->bd;
 	int	i;
@@ -94,6 +96,9 @@ static inline void dram_bank_mmu_setup(int bank)
 	}
 }
 
+void dram_bank_mmu_setup(int bank)
+	__attribute__((weak, alias("__dram_bank_mmu_setup")));
+
 /* to activate the MMU we need to set up virtual memory: use 1M areas */
 static inline void mmu_setup(void)
 {
-- 
1.7.9.5