[U-Boot] [PATCH v3 06/26] move UL() macro from armv8/mmu.h into common.h
Andre Przywara
andre.przywara at arm.com
Mon Dec 19 02:49:56 CET 2016
The UL() macro is pretty useful in sharing constants between assembly
and C files while still being able to specify a type for C.
Move the macro from an armv8 specific header into a common header file
to be able to use it by arm code (for instance) as well.
Signed-off-by: Andre Przywara <andre.przywara at arm.com>
Reviewed-by: Alexander Graf <agraf at suse.de>
---
arch/arm/include/asm/armv8/mmu.h | 8 --------
include/common.h | 13 ++++++++++++-
2 files changed, 12 insertions(+), 9 deletions(-)
diff --git a/arch/arm/include/asm/armv8/mmu.h b/arch/arm/include/asm/armv8/mmu.h
index aa0f3c4..e9b4cdb 100644
--- a/arch/arm/include/asm/armv8/mmu.h
+++ b/arch/arm/include/asm/armv8/mmu.h
@@ -8,14 +8,6 @@
#ifndef _ASM_ARMV8_MMU_H_
#define _ASM_ARMV8_MMU_H_
-#ifdef __ASSEMBLY__
-#define _AC(X, Y) X
-#else
-#define _AC(X, Y) (X##Y)
-#endif
-
-#define UL(x) _AC(x, UL)
-
/***************************************************************/
/*
* The following definitions are related each other, shoud be
diff --git a/include/common.h b/include/common.h
index a8d833b..ee0436b 100644
--- a/include/common.h
+++ b/include/common.h
@@ -15,6 +15,9 @@ typedef volatile unsigned long vu_long;
typedef volatile unsigned short vu_short;
typedef volatile unsigned char vu_char;
+/* Allow sharing constants with type modifiers between C and assembly. */
+#define _AC(X, Y) (X##Y)
+
#include <config.h>
#include <errno.h>
#include <asm-offsets.h>
@@ -936,7 +939,12 @@ int cpu_disable(int nr);
int cpu_release(int nr, int argc, char * const argv[]);
#endif
-#endif /* __ASSEMBLY__ */
+#else /* __ASSEMBLY__ */
+
+/* Drop a C type modifier (like in 3UL) for constants used in assembly. */
+#define _AC(X, Y) X
+
+#endif /* __ASSEMBLY__ */
#ifdef CONFIG_PPC
/*
@@ -948,6 +956,9 @@ int cpu_release(int nr, int argc, char * const argv[]);
/* Put only stuff here that the assembler can digest */
+/* Declare an unsigned long constant digestable both by C and an assembler. */
+#define UL(x) _AC(x, UL)
+
#ifdef CONFIG_POST
#define CONFIG_HAS_POST
#ifndef CONFIG_POST_ALT_LIST
--
2.8.2
More information about the U-Boot
mailing list