diff options
Diffstat (limited to 'arch/cris/arch-v32/kernel/cache.c')
| -rw-r--r-- | arch/cris/arch-v32/kernel/cache.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/cris/arch-v32/kernel/cache.c b/arch/cris/arch-v32/kernel/cache.c new file mode 100644 index 000000000000..80da7b88a72b --- /dev/null +++ b/arch/cris/arch-v32/kernel/cache.c @@ -0,0 +1,33 @@ +#include <linux/module.h> +#include <asm/io.h> +#include <asm/arch/cache.h> +#include <asm/arch/hwregs/dma.h> + +/* This file is used to workaround a cache bug, Guinness TR 106. */ + +inline void flush_dma_descr(struct dma_descr_data *descr, int flush_buf) +{ + /* Flush descriptor to make sure we get correct in_eop and after. */ + asm volatile ("ftagd [%0]" :: "r" (descr)); + /* Flush buffer pointed out by descriptor. */ + if (flush_buf) + cris_flush_cache_range(phys_to_virt((unsigned)descr->buf), + (unsigned)(descr->after - descr->buf)); +} +EXPORT_SYMBOL(flush_dma_descr); + +void flush_dma_list(struct dma_descr_data *descr) +{ + while (1) { + flush_dma_descr(descr, 1); + if (descr->eol) + break; + descr = phys_to_virt((unsigned)descr->next); + } +} +EXPORT_SYMBOL(flush_dma_list); + +/* From cacheflush.S */ +EXPORT_SYMBOL(cris_flush_cache); +/* From cacheflush.S */ +EXPORT_SYMBOL(cris_flush_cache_range); |