sh: Fix cached/uncaced address calculation in 29bit mode
Nobuhiro Iwamatsu [Fri, 4 Nov 2011 13:13:50 +0000 (22:13 +0900)]
commit dfd3b596fbbfa48b8e7966ef996d587157554b69 upstream.

In the case of 29bit mode, CAC/UNCAC_ADDR does not return a right address.
This revises this problem by using P1SEGADDR and P2SEGADDR in 29bit mode.

Reported-by: Yutaro Ebihara <ebiharaml@si-linux.co.jp>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

arch/sh/include/asm/page.h

index 822d608..abcc4dc 100644 (file)
@@ -141,8 +141,13 @@ typedef struct page *pgtable_t;
 #endif /* !__ASSEMBLY__ */
 
 #ifdef CONFIG_UNCACHED_MAPPING
+#if defined(CONFIG_29BIT)
+#define UNCAC_ADDR(addr)       P2SEGADDR(addr)
+#define CAC_ADDR(addr)         P1SEGADDR(addr)
+#else
 #define UNCAC_ADDR(addr)       ((addr) - PAGE_OFFSET + uncached_start)
 #define CAC_ADDR(addr)         ((addr) - uncached_start + PAGE_OFFSET)
+#endif
 #else
 #define UNCAC_ADDR(addr)       ((addr))
 #define CAC_ADDR(addr)         ((addr))