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| author | David S. Miller <davem@davemloft.net> | 2012-08-17 10:26:01 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-19 10:26:18 +0400 |
| commit | 73a6b0538c131d489fe7a2581deddb72faca496b (patch) | |
| tree | 3d74b564d96900134d168eff200f802970fb7d70 /arch/sparc/kernel | |
| parent | 09d053c797f4a559af0647e4283b9b9ec0682d10 (diff) | |
| download | linux-73a6b0538c131d489fe7a2581deddb72faca496b.tar.xz | |
sparc64: Abstract away the NMI PIC counter computation.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/nmi.c | 6 | ||||
| -rw-r--r-- | arch/sparc/kernel/pcr.c | 18 |
2 files changed, 19 insertions, 5 deletions
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index ef22b9bacf1d..4c45158d4c88 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -125,7 +125,7 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs) __this_cpu_write(alert_counter, 0); } if (__get_cpu_var(wd_enabled)) { - pcr_ops->write_pic(0, picl_value(nmi_hz)); + pcr_ops->write_pic(0, pcr_ops->nmi_picl_value(nmi_hz)); pcr_ops->write_pcr(0, pcr_enable); } @@ -223,7 +223,7 @@ void start_nmi_watchdog(void *unused) atomic_inc(&nmi_active); pcr_ops->write_pcr(0, PCR_PIC_PRIV); - pcr_ops->write_pic(0, picl_value(nmi_hz)); + pcr_ops->write_pic(0, pcr_ops->nmi_picl_value(nmi_hz)); pcr_ops->write_pcr(0, pcr_enable); } @@ -234,7 +234,7 @@ static void nmi_adjust_hz_one(void *unused) return; pcr_ops->write_pcr(0, PCR_PIC_PRIV); - pcr_ops->write_pic(0, picl_value(nmi_hz)); + pcr_ops->write_pic(0, pcr_ops->nmi_picl_value(nmi_hz)); pcr_ops->write_pcr(0, pcr_enable); } diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c index e82ae89666f0..494af3227f3b 100644 --- a/arch/sparc/kernel/pcr.c +++ b/arch/sparc/kernel/pcr.c @@ -27,7 +27,6 @@ (0xff << PCR_N2_MASK1_SHIFT)) u64 pcr_enable; -unsigned int picl_shift; /* Performance counter interrupts run unmasked at PIL level 15. * Therefore we can't do things like wakeups and other work @@ -98,11 +97,19 @@ static void direct_pic_write(unsigned long reg_num, u64 val) "rd %%pic, %%g0" : : "r" (val)); } +static u64 direct_picl_value(unsigned int nmi_hz) +{ + u32 delta = local_cpu_data().clock_tick / nmi_hz; + + return ((u64)((0 - delta) & 0xffffffff)) << 32; +} + static const struct pcr_ops direct_pcr_ops = { .read_pcr = direct_pcr_read, .write_pcr = direct_pcr_write, .read_pic = direct_pic_read, .write_pic = direct_pic_write, + .nmi_picl_value = direct_picl_value, }; static void n2_pcr_write(unsigned long reg_num, u64 val) @@ -118,11 +125,19 @@ static void n2_pcr_write(unsigned long reg_num, u64 val) direct_pcr_write(reg_num, val); } +static u64 n2_picl_value(unsigned int nmi_hz) +{ + u32 delta = local_cpu_data().clock_tick / (nmi_hz << 2); + + return ((u64)((0 - delta) & 0xffffffff)) << 32; +} + static const struct pcr_ops n2_pcr_ops = { .read_pcr = direct_pcr_read, .write_pcr = n2_pcr_write, .read_pic = direct_pic_read, .write_pic = direct_pic_write, + .nmi_picl_value = n2_picl_value, }; static unsigned long perf_hsvc_group; @@ -180,7 +195,6 @@ int __init pcr_arch_init(void) case hypervisor: pcr_ops = &n2_pcr_ops; pcr_enable = PCR_N2_ENABLE; - picl_shift = 2; break; case cheetah: |