From 387871a10edc777a5d94bfdbd6b86e493991826e Mon Sep 17 00:00:00 2001 From: "Wu, Josh" Date: Mon, 27 Jul 2015 11:40:16 +0800 Subject: 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 Reviewed-by: York Sun --- arch/arm/lib/cache.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/arm/lib') 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 -- cgit v1.2.3