diff options
| author |   Paul Mackerras <paulus@samba.org> | 2005-10-27 22:44:39 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-10-27 22:44:39 +1000 |
| commit | 6316222ea050d469c3155881d9dee2c7671d9fef (patch) | |
| tree | 2a075cbdab11e10efc868a31e378dffae90f06da /arch/powerpc/kernel/fpu.S | |
| parent | powerpc: 32-bit CHRP SMP fixes (diff) | |
| download | linux-dev-6316222ea050d469c3155881d9dee2c7671d9fef.tar.xz linux-dev-6316222ea050d469c3155881d9dee2c7671d9fef.zip | |
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.S | 8 |
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 */ |