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

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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 <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
This commit is contained in:
Michael Neuling 2008-06-26 17:07:48 +10:00 • committed by Paul Mackerras
commit 9c75a31c35
8 changed files with 58 additions and 43 deletions
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5
include/asm-powerpc/ppc_asm.h
View file

@ -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)

4
include/asm-powerpc/processor.h
View file

@ -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 */