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authorThiemo Seufer <ths@networkno.de>2006-11-16 22:13:54 +0000
committerRalf Baechle <ralf@linux-mips.org>2006-11-22 23:34:01 +0000
commiteb4828750852b84703f64747b3bedf6394d629ef (patch)
tree49fbb6d7168132c470499bbffdb4f08e5c071d4e /arch
parent0f9005a6f7a82f4aacbd72f7b92322a8ca1c3f97 (diff)
downloadop-kernel-dev-eb4828750852b84703f64747b3bedf6394d629ef.zip
op-kernel-dev-eb4828750852b84703f64747b3bedf6394d629ef.tar.gz
[MIPS] Hack for SB1 cache issues
Removing flush_icache_page a while ago broke SB1 which was using an empty flush_data_cache_page function. This glues things well enough so a more efficient but also more intrusive solution can be found later. Signed-Off-By: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/mm/c-sb1.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/mips/mm/c-sb1.c b/arch/mips/mm/c-sb1.c
index d0ddb4a..3a8afd4 100644
--- a/arch/mips/mm/c-sb1.c
+++ b/arch/mips/mm/c-sb1.c
@@ -19,6 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/init.h>
+#include <linux/hardirq.h>
#include <asm/asm.h>
#include <asm/bootinfo.h>
@@ -242,6 +243,25 @@ void sb1_flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsign
__attribute__((alias("local_sb1_flush_cache_page")));
#endif
+#ifdef CONFIG_SMP
+static void sb1_flush_cache_data_page_ipi(void *info)
+{
+ unsigned long start = (unsigned long)info;
+
+ __sb1_writeback_inv_dcache_range(start, start + PAGE_SIZE);
+}
+
+static void sb1_flush_cache_data_page(unsigned long addr)
+{
+ if (in_atomic())
+ __sb1_writeback_inv_dcache_range(addr, addr + PAGE_SIZE);
+ else
+ on_each_cpu(sb1_flush_cache_data_page_ipi, (void *) addr, 1, 1);
+}
+#else
+void sb1_flush_cache_data_page(unsigned long)
+ __attribute__((alias("local_sb1_flush_cache_data_page")));
+#endif
/*
* Invalidate all caches on this CPU
@@ -481,7 +501,7 @@ void sb1_cache_init(void)
flush_cache_sigtramp = sb1_flush_cache_sigtramp;
local_flush_data_cache_page = (void *) sb1_nop;
- flush_data_cache_page = (void *) sb1_nop;
+ flush_data_cache_page = sb1_flush_cache_data_page;
/* Full flush */
__flush_cache_all = sb1___flush_cache_all;
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