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authorWu, Josh <Josh.wu@atmel.com>2015-07-27 11:40:16 +0800
committerTom Rini <trini@konsulko.com>2015-08-12 20:47:47 -0400
commit387871a10edc777a5d94bfdbd6b86e493991826e (patch)
tree7461973b0510ef8f0ca6eb3df08fdb350edee0c3
parent4dbe4b168bd3b315930bf65bb6c95eac10170026 (diff)
ARM: cache: add an empty stub function for invalidate/flush dcache
Since some driver like ohci, lcd used dcache functions. But some ARM cpu don't implement the invalidate_dcache_range()/flush_dcache_range() functions. To avoid compiling errors this patch adds an weak empty stub function for all ARM cpu in arch/arm/lib/cache.c. And ARM cpu still can implemnt its own cache functions on the cpu folder. Signed-off-by: Josh Wu <josh.wu@atmel.com> Reviewed-by: York Sun <yorksun@freescale.com>
-rw-r--r--arch/arm/cpu/arm11/cpu.c8
-rw-r--r--arch/arm/cpu/arm926ejs/cache.c8
-rw-r--r--arch/arm/cpu/armv7/cache_v7.c8
-rw-r--r--arch/arm/cpu/armv8/cache_v8.c8
-rw-r--r--arch/arm/lib/cache.c9
5 files changed, 9 insertions, 32 deletions
diff --git a/arch/arm/cpu/arm11/cpu.c b/arch/arm/cpu/arm11/cpu.c
index 5d4b3c2a02b..06dee0fc1b9 100644
--- a/arch/arm/cpu/arm11/cpu.c
+++ b/arch/arm/cpu/arm11/cpu.c
@@ -124,14 +124,6 @@ void flush_dcache_all(void)
{
}
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
void flush_cache(unsigned long start, unsigned long size)
{
}
diff --git a/arch/arm/cpu/arm926ejs/cache.c b/arch/arm/cpu/arm926ejs/cache.c
index 8d7873c9af3..99d1a139b0d 100644
--- a/arch/arm/cpu/arm926ejs/cache.c
+++ b/arch/arm/cpu/arm926ejs/cache.c
@@ -83,14 +83,6 @@ void flush_dcache_all(void)
{
}
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
void flush_cache(unsigned long start, unsigned long size)
{
}
diff --git a/arch/arm/cpu/armv7/cache_v7.c b/arch/arm/cpu/armv7/cache_v7.c
index e8ee875981f..4f0e4062a2d 100644
--- a/arch/arm/cpu/armv7/cache_v7.c
+++ b/arch/arm/cpu/armv7/cache_v7.c
@@ -304,14 +304,6 @@ void flush_dcache_all(void)
{
}
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
void arm_init_before_mmu(void)
{
}
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
index c22f7b6a51e..cd160c4b633 100644
--- a/arch/arm/cpu/armv8/cache_v8.c
+++ b/arch/arm/cpu/armv8/cache_v8.c
@@ -180,14 +180,6 @@ void flush_dcache_all(void)
{
}
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
-
void dcache_enable(void)
{
}
diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c
index 74cfde637c1..bc48f53f4c5 100644
--- a/arch/arm/lib/cache.c
+++ b/arch/arm/lib/cache.c
@@ -53,6 +53,15 @@ __weak void enable_caches(void)
puts("WARNING: Caches not enabled\n");
}
+__weak void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+ /* An empty stub, real implementation should be in platform code */
+}
+__weak void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+ /* An empty stub, real implementation should be in platform code */
+}
+
#ifdef CONFIG_SYS_NONCACHED_MEMORY
/*
* Reserve one MMU section worth of address space below the malloc() area that