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authorPaul Mackerras <paulus@samba.org>2005-10-27 22:44:39 +1000
committerPaul Mackerras <paulus@samba.org>2005-10-27 22:44:39 +1000
commit6316222ea050d469c3155881d9dee2c7671d9fef (patch)
tree2a075cbdab11e10efc868a31e378dffae90f06da /arch/powerpc/kernel/fpu.S
parent80579e1f4a6b5f5dec92faa6c3e0645961c99091 (diff)
powerpc: Introduce toreal/fromreal assembly macros
On 32-bit platforms, these convert from kernel virtual addresses to real (physical addresses), like tophys/tovirt but they use the same register for the source and destination. On 64-bit platforms, they do nothing because the hardware ignores the top two bits of the address in real mode. These new macros are used in fpu.S now. Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/fpu.S')
-rw-r--r--arch/powerpc/kernel/fpu.S8
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S
index 51fd78da25b7..4d6001fa1cf2 100644
--- a/arch/powerpc/kernel/fpu.S
+++ b/arch/powerpc/kernel/fpu.S
@@ -40,17 +40,17 @@ _GLOBAL(load_up_fpu)
*/
#ifndef CONFIG_SMP
LOADBASE(r3, last_task_used_math)
- tophys(r3,r3)
+ toreal(r3)
LDL r4,OFF(last_task_used_math)(r3)
CMPI 0,r4,0
beq 1f
- tophys(r4,r4)
+ toreal(r4)
addi r4,r4,THREAD /* want last_task_used_math->thread */
SAVE_32FPRS(0, r4)
mffs fr0
stfd fr0,THREAD_FPSCR(r4)
LDL r5,PT_REGS(r4)
- tophys(r5,r5)
+ toreal(r5)
LDL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
li r10,MSR_FP|MSR_FE0|MSR_FE1
andc r4,r4,r10 /* disable FP for previous task */
@@ -76,7 +76,7 @@ _GLOBAL(load_up_fpu)
REST_32FPRS(0, r5)
#ifndef CONFIG_SMP
subi r4,r5,THREAD
- tovirt(r4,r4)
+ fromreal(r4)
STL r4,OFF(last_task_used_math)(r3)
#endif /* CONFIG_SMP */
/* restore registers and return */