From: Alessandro Rubini Date: Tue, 26 Jan 2010 17:16:19 +0100 Subject: [U-Boot] [PATCH RFC 1/2] flush cache for arm926 Message-ID: <20100126161619.GA20972@morgana.gnudd.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de This simple adds the cache flush for arm926. Most likely the same works for other families, like arm920t, but I didn't check as this is currently just an RFC. Signed-off-by: Alessandro Rubini --- lib_arm/cache.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/lib_arm/cache.c b/lib_arm/cache.c index 61ee9d3..b36fd24 100644 --- a/lib_arm/cache.c +++ b/lib_arm/cache.c @@ -32,5 +32,11 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2) arm1136_cache_flush(); #endif +#ifdef CONFIG_ARM926EJS + /* test and clean, page 2-23 of arm926ejs manual */ + asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory"); + /* disable write buffer as well (page 2-22) */ + asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); +#endif return; } -- 1.6.0.2