Re: [PATCH] H8/300 read{b,w,l} / write{b,w,l} error fix

[Yoshinori Sato <ysato@users.sourceforge.jp>]

At Fri, 12 Nov 2004 09:25:00 -0800,
Joe Perches wrote:
> 
> On Sat, 2004-11-13 at 01:42 +0900, Yoshinori Sato wrote:
> >  #define readb(addr) \
> > -    ({ unsigned char __v = (*(volatile unsigned char *) ((addr) & 0x00ffffff)); __v; })
> > +    ({ unsigned char __v = \
> > +     *(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \
> > +     __v; })
> 
> How about moving #define IO_SPACE_LIMIT up and using that instead?
> 

It is so.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

diff -Nru a/include/asm-h8300/io.h b/include/asm-h8300/io.h
--- a/include/asm-h8300/io.h	2004-11-14 00:21:49 +09:00
+++ b/include/asm-h8300/io.h	2004-11-14 00:21:49 +09:00
@@ -69,16 +69,27 @@
 #endif
 }
 
+#define IO_SPACE_LIMIT 0xffffff
+
 #define readb(addr) \
-    ({ unsigned char __v = (*(volatile unsigned char *) ((addr) & 0x00ffffff)); __v; })
+    ({ unsigned char __v = \
+     *(volatile unsigned char *)((unsigned long)(addr) & IO_SPACE_LIMIT); \
+     __v; })
 #define readw(addr) \
-    ({ unsigned short __v = (*(volatile unsigned short *) ((addr) & 0x00ffffff)); __v; })
+    ({ unsigned short __v = \
+     *(volatile unsigned short *)((unsigned long)(addr) & IO_SPACE_LIMIT); \
+     __v; })
 #define readl(addr) \
-    ({ unsigned int __v = (*(volatile unsigned int *) ((addr) & 0x00ffffff)); __v; })
-
-#define writeb(b,addr) (void)((*(volatile unsigned char *) ((addr) & 0x00ffffff)) = (b))
-#define writew(b,addr) (void)((*(volatile unsigned short *) ((addr) & 0x00ffffff)) = (b))
-#define writel(b,addr) (void)((*(volatile unsigned int *) ((addr) & 0x00ffffff)) = (b))
+    ({ unsigned long __v = \
+     *(volatile unsigned long *)((unsigned long)(addr) & IO_SPACE_LIMIT); \
+     __v; })
+
+#define writeb(b,addr) (void)((*(volatile unsigned char *) \
+                             ((unsigned long)(addr) & IO_SPACE_LIMIT)) = (b))
+#define writew(b,addr) (void)((*(volatile unsigned short *) \
+                             ((unsigned long)(addr) & IO_SPACE_LIMIT)) = (b))
+#define writel(b,addr) (void)((*(volatile unsigned long *) \
+                             ((unsigned long)(addr) & IO_SPACE_LIMIT)) = (b))
 #define readb_relaxed(addr) readb(addr)
 #define readw_relaxed(addr) readw(addr)
 #define readl_relaxed(addr) readl(addr)
@@ -224,9 +235,6 @@
 #define insb(a,b,l) io_insb(a,b,l)
 #define insw(a,b,l) io_insw(a,b,l)
 #define insl(a,b,l) io_insl(a,b,l)
-
-#define IO_SPACE_LIMIT 0xffffff
-
 
 /* Values for nocacheflag and cmode */
 #define IOMAP_FULL_CACHING		0

-- 
Yoshinori Sato
<ysato@users.sourceforge.jp>