[U-Boot] [PATCH 2/4] MIPS: Fix _ACAST32_ for pointers on MIPS64

[Paul Burton]

When building for MIPS64 and providing a pointer to _ACAST32_,
optionally via CPHYSADDR or one of the CKSEGxADDR macros, the cast
directly to a 32 bit int leads to compilation warnings such as the
following:

  In file included from ./arch/mips/include/asm/io.h:17:0,
                   from drivers/net/pcnet.c:14:
  drivers/net/pcnet.c: In function ‘pcnet_virt_to_mem’:
  ./arch/mips/include/asm/addrspace.h:39:29: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   #define _ACAST32_  (_ATYPE_)(_ATYPE32_) /* widen if necessary */
                               ^
  ./arch/mips/include/asm/addrspace.h:51:25: note: in expansion of macro ‘_ACAST32_’
   #define CPHYSADDR(a)  ((_ACAST32_(a)) & 0x1fffffff)
                           ^
  ./arch/mips/include/asm/addrspace.h:71:25: note: in expansion of macro ‘CPHYSADDR’
   #define CKSEG0ADDR(a)  (CPHYSADDR(a) | CKSEG0)
                           ^
  drivers/net/pcnet.c:144:23: note: in expansion of macro ‘CKSEG0ADDR’
     virt_addr = (void *)CKSEG0ADDR(addr);
                         ^

Fix this by first casting provided values to a pointer-width integer,
then truncating to a 32 bit int & widening back to pointer-width.

Signed-off-by: Paul Burton <paul.burton at imgtec.com>
---

 arch/mips/include/asm/addrspace.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/addrspace.h b/arch/mips/include/asm/addrspace.h
index 0994e96..fe497b5 100644
--- a/arch/mips/include/asm/addrspace.h
+++ b/arch/mips/include/asm/addrspace.h
@@ -36,8 +36,8 @@
 #define _ACAST32_
 #define _ACAST64_
 #else
-#define _ACAST32_		(_ATYPE_)(_ATYPE32_)	/* widen if necessary */
-#define _ACAST64_		(_ATYPE64_)		/* do _not_ narrow */
+#define _ACAST32_	(_ATYPE_)(_ATYPE32_)(_ATYPE_)	/* widen if necessary */
+#define _ACAST64_	(_ATYPE64_)		/* do _not_ narrow */
 #endif
 
 /*
-- 
2.8.2