diff options
Diffstat (limited to 'arch/arm/vfp')
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index 86a57aeeda4a..def19f83d812 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -430,7 +430,11 @@ static inline void vfp_pm_init(void) { } * saved one. This function is used by the ptrace mechanism. */ #ifdef CONFIG_SMP -void vfp_sync_state(struct thread_info *thread) +void vfp_sync_hwstate(struct thread_info *thread) +{ +} + +void vfp_flush_hwstate(struct thread_info *thread) { /* * On SMP systems, the VFP state is automatically saved at every @@ -441,7 +445,7 @@ void vfp_sync_state(struct thread_info *thread) thread->vfpstate.hard.cpu = NR_CPUS; } #else -void vfp_sync_state(struct thread_info *thread) +void vfp_sync_hwstate(struct thread_info *thread) { unsigned int cpu = get_cpu(); @@ -457,6 +461,23 @@ void vfp_sync_state(struct thread_info *thread) */ fmxr(FPEXC, fpexc | FPEXC_EN); vfp_save_state(&thread->vfpstate, fpexc | FPEXC_EN); + fmxr(FPEXC, fpexc); + } + + put_cpu(); +} + +void vfp_flush_hwstate(struct thread_info *thread) +{ + unsigned int cpu = get_cpu(); + + /* + * If the thread we're interested in is the current owner of the + * hardware VFP state, then we need to save its state. + */ + if (last_VFP_context[cpu] == &thread->vfpstate) { + u32 fpexc = fmrx(FPEXC); + fmxr(FPEXC, fpexc & ~FPEXC_EN); /* |