diff options
Diffstat (limited to 'arch/parisc/kernel/cache.c')
| -rw-r--r-- | arch/parisc/kernel/cache.c | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index f46a07a79218..a065349aee37 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -27,6 +27,7 @@ #include <asm/page.h> #include <asm/pgalloc.h> #include <asm/processor.h> +#include <asm/sections.h> int split_tlb; int dcache_stride; @@ -207,6 +208,9 @@ parisc_cache_init(void) /* "New and Improved" version from Jim Hull * (1 << (cc_block-1)) * (cc_line << (4 + cnf.cc_shift)) + * The following CAFL_STRIDE is an optimized version, see + * http://lists.parisc-linux.org/pipermail/parisc-linux/2004-June/023625.html + * http://lists.parisc-linux.org/pipermail/parisc-linux/2004-June/023671.html */ #define CAFL_STRIDE(cnf) (cnf.cc_line << (3 + cnf.cc_block + cnf.cc_shift)) dcache_stride = CAFL_STRIDE(cache_info.dc_conf); @@ -266,7 +270,6 @@ void flush_dcache_page(struct page *page) unsigned long offset; unsigned long addr; pgoff_t pgoff; - pte_t *pte; unsigned long pfn = page_to_pfn(page); @@ -297,21 +300,16 @@ void flush_dcache_page(struct page *page) * taking a page fault if the pte doesn't exist. * This is just for speed. If the page translation * isn't there, there's no point exciting the - * nadtlb handler into a nullification frenzy */ - - - if(!(pte = translation_exists(mpnt, addr))) - continue; - - /* make sure we really have this page: the private + * nadtlb handler into a nullification frenzy. + * + * Make sure we really have this page: the private * mappings may cover this area but have COW'd this - * particular page */ - if(pte_pfn(*pte) != pfn) - continue; - - __flush_cache_page(mpnt, addr); - - break; + * particular page. + */ + if (translation_exists(mpnt, addr, pfn)) { + __flush_cache_page(mpnt, addr); + break; + } } flush_dcache_mmap_unlock(mapping); } @@ -339,17 +337,15 @@ int parisc_cache_flush_threshold = FLUSH_THRESHOLD; void parisc_setup_cache_timing(void) { unsigned long rangetime, alltime; - extern char _text; /* start of kernel code, defined by linker */ - extern char _end; /* end of BSS, defined by linker */ unsigned long size; alltime = mfctl(16); flush_data_cache(); alltime = mfctl(16) - alltime; - size = (unsigned long)(&_end - _text); + size = (unsigned long)(_end - _text); rangetime = mfctl(16); - flush_kernel_dcache_range((unsigned long)&_text, size); + flush_kernel_dcache_range((unsigned long)_text, size); rangetime = mfctl(16) - rangetime; printk(KERN_DEBUG "Whole cache flush %lu cycles, flushing %lu bytes %lu cycles\n", |