From 387871a10edc777a5d94bfdbd6b86e493991826e Mon Sep 17 00:00:00 2001 From: "Wu, Josh" Date: Mon, 27 Jul 2015 11:40:16 +0800 Subject: [PATCH] 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/cpu/arm11/cpu.c | 8 -------- arch/arm/cpu/arm926ejs/cache.c | 8 -------- arch/arm/cpu/armv7/cache_v7.c | 8 -------- arch/arm/cpu/armv8/cache_v8.c | 8 -------- arch/arm/lib/cache.c | 9 +++++++++ 5 files changed, 9 insertions(+), 32 deletions(-) diff --git a/arch/arm/cpu/arm11/cpu.c b/arch/arm/cpu/arm11/cpu.c index 5d4b3c2a02..06dee0fc1b 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 8d7873c9af..99d1a139b0 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 e8ee875981..4f0e4062a2 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 c22f7b6a51..cd160c4b63 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 74cfde637c..bc48f53f4c 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 -- 2.39.5