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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2017-08-08 13:58:50 +0200 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-08-10 23:32:09 +1000 |
| commit | 72e4b2cdf07b4c43115f058ed74d694eab5d6454 (patch) | |
| tree | bce21f1e76f78f8843732cdc1c2988f5931891ec /arch/powerpc/kernel/vdso32 | |
| parent | powerpc/8xx: Move mpc8xx_pic.c from sysdev to platform/8xx (diff) | |
| download | linux-dev-72e4b2cdf07b4c43115f058ed74d694eab5d6454.tar.xz linux-dev-72e4b2cdf07b4c43115f058ed74d694eab5d6454.zip | |
powerpc/time: refactor MFTB() to limit number of ifdefs
The 8xx cannot access the TBL and TBU registers using mfspr/mtspr
It must be accessed using mftb/mftbu
Due to this, there is a number of places with #ifdef CONFIG_8xx
This patch defines new macros MFTBL(x) and MFTBU(x) on the same model
as MFTB(x) and tries to make use of them as much as possible.
In arch/powerpc/include/asm/timex.h, we also remove the ifdef
for the asm() operands as the compiler doesn't mind unused operands
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/vdso32')
| -rw-r--r-- | arch/powerpc/kernel/vdso32/gettimeofday.S | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S index 6b2b69616e77..769c2624e0a6 100644 --- a/arch/powerpc/kernel/vdso32/gettimeofday.S +++ b/arch/powerpc/kernel/vdso32/gettimeofday.S @@ -232,15 +232,9 @@ __do_get_tspec: lwz r6,(CFG_TB_ORIG_STAMP+4)(r9) /* Get a stable TB value */ -#ifdef CONFIG_8xx -2: mftbu r3 - mftbl r4 - mftbu r0 -#else -2: mfspr r3, SPRN_TBRU - mfspr r4, SPRN_TBRL - mfspr r0, SPRN_TBRU -#endif +2: MFTBU(r3) + MFTBL(r4) + MFTBU(r0) cmplw cr0,r3,r0 bne- 2b |