powerpc: Add macros to access floating point registers in thread_struct.

We are going to change where the floating point registers are stored
in the thread_struct, so in preparation add some macros to access the
floating point registers.  Update all code to use these new macros.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 7 insertions, 2 deletions

diff --git a/include/asm-powerpc/ppc_asm.h b/include/asm-powerpc/ppc_asm.h
index ef96bfd4ef4c..8f0426f973c9 100644
--- a/include/asm-powerpc/ppc_asm.h
+++ b/include/asm-powerpc/ppc_asm.h
@@ -6,6 +6,7 @@
 
 #include <linux/stringify.h>
 #include <asm/asm-compat.h>
+#include <asm/processor.h>
 
 #ifndef __ASSEMBLY__
 #error __FILE__ should only be used in assembler files
@@ -83,13 +84,13 @@ END_FTR_SECTION_IFCLR(CPU_FTR_PURR);					\
 #define REST_8GPRS(n, base)     REST_4GPRS(n, base); REST_4GPRS(n+4, base)
 #define REST_10GPRS(n, base)    REST_8GPRS(n, base); REST_2GPRS(n+8, base)
 
-#define SAVE_FPR(n, base)       stfd    n,THREAD_FPR0+8*(n)(base)
+#define SAVE_FPR(n, base)       stfd    n,THREAD_FPR0+8*TS_FPRWIDTH*(n)(base)
 #define SAVE_2FPRS(n, base)     SAVE_FPR(n, base); SAVE_FPR(n+1, base)
 #define SAVE_4FPRS(n, base)     SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
 #define SAVE_8FPRS(n, base)     SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
 #define SAVE_16FPRS(n, base)    SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
 #define SAVE_32FPRS(n, base)    SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
-#define REST_FPR(n, base)       lfd     n,THREAD_FPR0+8*(n)(base)
+#define REST_FPR(n, base)       lfd     n,THREAD_FPR0+8*TS_FPRWIDTH*(n)(base)
 #define REST_2FPRS(n, base)     REST_FPR(n, base); REST_FPR(n+1, base)
 #define REST_4FPRS(n, base)     REST_2FPRS(n, base); REST_2FPRS(n+2, base)
 #define REST_8FPRS(n, base)     REST_4FPRS(n, base); REST_4FPRS(n+4, base)
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index a1deed85f31d..a23da6356e06 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -12,6 +12,8 @@
 
 #include <asm/reg.h>
 
+#define TS_FPRWIDTH 1
+
 #ifndef __ASSEMBLY__
 #include <linux/compiler.h>
 #include <asm/ptrace.h>
@@ -140,6 +142,8 @@ typedef struct {
         unsigned long seg;
 } mm_segment_t;
 
+#define TS_FPR(i) fpr[i]
+
 struct thread_struct {
         unsigned long   ksp;            /* Kernel stack pointer */
         unsigned long   ksp_limit;      /* if ksp <= ksp_limit stack overflow */