Merge git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa

[linux-2.6-omap-h63xx.git] / include / asm-powerpc / ppc_asm.h

diff --git a/include/asm-powerpc/ppc_asm.h b/include/asm-powerpc/ppc_asm.h
index c27baa0563feaa4020b330a29b480f2748aac9e2..ab8688d39024763ca01cd626035330015a06fab8 100644 (file)
--- a/include/asm-powerpc/ppc_asm.h
+++ b/include/asm-powerpc/ppc_asm.h
@@ -94,6 +94,7 @@
 #define RFDI           .long 0x4c00004e        /* rfdi instruction */
 #define RFMCI          .long 0x4c00004c        /* rfmci instruction */
 
+#ifdef __KERNEL__
 #ifdef CONFIG_PPC64
 
 #define XGLUE(a,b) a##b
@@ -155,52 +156,56 @@ n:
 #endif
 
 /* 
- * LOADADDR( rn, name )
- *   loads the address of 'name' into 'rn'
+ * LOAD_REG_IMMEDIATE(rn, expr)
+ *   Loads the value of the constant expression 'expr' into register 'rn'
+ *   using immediate instructions only.  Use this when it's important not
+ *   to reference other data (i.e. on ppc64 when the TOC pointer is not
+ *   valid).
  *
- * LOADBASE( rn, name )
- *   loads the address (possibly without the low 16 bits) of 'name' into 'rn'
- *   suitable for base+disp addressing
+ * LOAD_REG_ADDR(rn, name)
+ *   Loads the address of label 'name' into register 'rn'.  Use this when
+ *   you don't particularly need immediate instructions only, but you need
+ *   the whole address in one register (e.g. it's a structure address and
+ *   you want to access various offsets within it).  On ppc32 this is
+ *   identical to LOAD_REG_IMMEDIATE.
+ *
+ * LOAD_REG_ADDRBASE(rn, name)
+ * ADDROFF(name)
+ *   LOAD_REG_ADDRBASE loads part of the address of label 'name' into
+ *   register 'rn'.  ADDROFF(name) returns the remainder of the address as
+ *   a constant expression.  ADDROFF(name) is a signed expression < 16 bits
+ *   in size, so is suitable for use directly as an offset in load and store
+ *   instructions.  Use this when loading/storing a single word or less as:
+ *      LOAD_REG_ADDRBASE(rX, name)
+ *      ld     rY,ADDROFF(name)(rX)
  */
 #ifdef __powerpc64__
-#define LOADADDR(rn,name) \
-       lis     rn,name##@highest;      \
-       ori     rn,rn,name##@higher;    \
-       rldicr  rn,rn,32,31;            \
-       oris    rn,rn,name##@h;         \
-       ori     rn,rn,name##@l
-
-#define LOADBASE(rn,name)              \
-       ld      rn,name@got(r2)
-
-#define OFF(name)      0
-
-#define SET_REG_TO_CONST(reg, value)                   \
-       lis     reg,(((value)>>48)&0xFFFF);             \
-       ori     reg,reg,(((value)>>32)&0xFFFF);         \
-       rldicr  reg,reg,32,31;                          \
-       oris    reg,reg,(((value)>>16)&0xFFFF);         \
-       ori     reg,reg,((value)&0xFFFF);
-
-#define SET_REG_TO_LABEL(reg, label)                   \
-       lis     reg,(label)@highest;                    \
-       ori     reg,reg,(label)@higher;                 \
-       rldicr  reg,reg,32,31;                          \
-       oris    reg,reg,(label)@h;                      \
-       ori     reg,reg,(label)@l;
+#define LOAD_REG_IMMEDIATE(reg,expr)           \
+       lis     (reg),(expr)@highest;           \
+       ori     (reg),(reg),(expr)@higher;      \
+       rldicr  (reg),(reg),32,31;              \
+       oris    (reg),(reg),(expr)@h;           \
+       ori     (reg),(reg),(expr)@l;
+
+#define LOAD_REG_ADDR(reg,name)                        \
+       ld      (reg),name@got(r2)
+
+#define LOAD_REG_ADDRBASE(reg,name)    LOAD_REG_ADDR(reg,name)
+#define ADDROFF(name)                  0
 
 /* offsets for stack frame layout */
 #define LRSAVE 16
 
 #else /* 32-bit */
-#define LOADADDR(rn,name) \
-       lis     rn,name@ha;     \
-       addi    rn,rn,name@l
 
-#define LOADBASE(rn,name)      \
-       lis     rn,name@ha
+#define LOAD_REG_IMMEDIATE(reg,expr)           \
+       lis     (reg),(expr)@ha;                \
+       addi    (reg),(reg),(expr)@l;
 
-#define OFF(name)      name@l
+#define LOAD_REG_ADDR(reg,name)                LOAD_REG_IMMEDIATE(reg, name)
+
+#define LOAD_REG_ADDRBASE(reg, name)   lis     (reg),name@ha
+#define ADDROFF(name)                  name@l
 
 /* offsets for stack frame layout */
 #define LRSAVE 4
@@ -325,6 +330,8 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
 #define CLR_TOP32(r)
 #endif
 
+#endif /* __KERNEL__ */
+
 /* The boring bits... */
 
 /* Condition Register Bit Fields */