From e0cee3eea7875800451739ae38f99edcf11c133d Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Mon, 4 Aug 2008 20:53:57 +0200 Subject: [MIPS] Fix WARNING: at kernel/smp.c:290 trap_init issues flush_icache_range(), which uses ipi functions to get icache flushing done on all cpus. But this is done before interrupts are enabled and caused WARN_ON messages. This changeset introduces a new local_flush_icache_range() and uses it before interrupts (and additional CPUs) are enabled to avoid this problem. Signed-off-by: Thomas Bogendoerfer Signed-off-by: Ralf Baechle --- arch/mips/mm/c-r3k.c | 1 + arch/mips/mm/c-r4k.c | 18 ++++++++++++------ arch/mips/mm/c-tx39.c | 1 + arch/mips/mm/cache.c | 1 + arch/mips/mm/tlbex.c | 6 +++--- 5 files changed, 18 insertions(+), 9 deletions(-) (limited to 'arch/mips/mm') diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c index 27a5b46..5500c20 100644 --- a/arch/mips/mm/c-r3k.c +++ b/arch/mips/mm/c-r3k.c @@ -320,6 +320,7 @@ void __cpuinit r3k_cache_init(void) flush_cache_range = r3k_flush_cache_range; flush_cache_page = r3k_flush_cache_page; flush_icache_range = r3k_flush_icache_range; + local_flush_icache_range = r3k_flush_icache_range; flush_cache_sigtramp = r3k_flush_cache_sigtramp; local_flush_data_cache_page = local_r3k_flush_data_cache_page; diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 71df339..6e99665 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -543,12 +543,8 @@ struct flush_icache_range_args { unsigned long end; }; -static inline void local_r4k_flush_icache_range(void *args) +static inline void local_r4k_flush_icache_range(unsigned long start, unsigned long end) { - struct flush_icache_range_args *fir_args = args; - unsigned long start = fir_args->start; - unsigned long end = fir_args->end; - if (!cpu_has_ic_fills_f_dc) { if (end - start >= dcache_size) { r4k_blast_dcache(); @@ -564,6 +560,15 @@ static inline void local_r4k_flush_icache_range(void *args) protected_blast_icache_range(start, end); } +static inline void local_r4k_flush_icache_range_ipi(void *args) +{ + struct flush_icache_range_args *fir_args = args; + unsigned long start = fir_args->start; + unsigned long end = fir_args->end; + + local_r4k_flush_icache_range(start, end); +} + static void r4k_flush_icache_range(unsigned long start, unsigned long end) { struct flush_icache_range_args args; @@ -571,7 +576,7 @@ static void r4k_flush_icache_range(unsigned long start, unsigned long end) args.start = start; args.end = end; - r4k_on_each_cpu(local_r4k_flush_icache_range, &args, 1); + r4k_on_each_cpu(local_r4k_flush_icache_range_ipi, &args, 1); instruction_hazard(); } @@ -1375,6 +1380,7 @@ void __cpuinit r4k_cache_init(void) local_flush_data_cache_page = local_r4k_flush_data_cache_page; flush_data_cache_page = r4k_flush_data_cache_page; flush_icache_range = r4k_flush_icache_range; + local_flush_icache_range = local_r4k_flush_icache_range; #if defined(CONFIG_DMA_NONCOHERENT) if (coherentio) { diff --git a/arch/mips/mm/c-tx39.c b/arch/mips/mm/c-tx39.c index a9f7f1f..39c8182 100644 --- a/arch/mips/mm/c-tx39.c +++ b/arch/mips/mm/c-tx39.c @@ -362,6 +362,7 @@ void __cpuinit tx39_cache_init(void) flush_cache_range = (void *) tx39h_flush_icache_all; flush_cache_page = (void *) tx39h_flush_icache_all; flush_icache_range = (void *) tx39h_flush_icache_all; + local_flush_icache_range = (void *) tx39h_flush_icache_all; flush_cache_sigtramp = (void *) tx39h_flush_icache_all; local_flush_data_cache_page = (void *) tx39h_flush_icache_all; diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c index 034e850..1eb7c71 100644 --- a/arch/mips/mm/cache.c +++ b/arch/mips/mm/cache.c @@ -29,6 +29,7 @@ void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start, void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); void (*flush_icache_range)(unsigned long start, unsigned long end); +void (*local_flush_icache_range)(unsigned long start, unsigned long end); void (*__flush_cache_vmap)(void); void (*__flush_cache_vunmap)(void); diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 76da73a..979cf91 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -1273,10 +1273,10 @@ void __cpuinit build_tlb_refill_handler(void) void __cpuinit flush_tlb_handlers(void) { - flush_icache_range((unsigned long)handle_tlbl, + local_flush_icache_range((unsigned long)handle_tlbl, (unsigned long)handle_tlbl + sizeof(handle_tlbl)); - flush_icache_range((unsigned long)handle_tlbs, + local_flush_icache_range((unsigned long)handle_tlbs, (unsigned long)handle_tlbs + sizeof(handle_tlbs)); - flush_icache_range((unsigned long)handle_tlbm, + local_flush_icache_range((unsigned long)handle_tlbm, (unsigned long)handle_tlbm + sizeof(handle_tlbm)); } -- cgit v1.1