sparc64: Abstract away the NMI PIC counter computation.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index e82ae89..494af32 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 @@
"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 @@
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 @@
case hypervisor:
pcr_ops = &n2_pcr_ops;
pcr_enable = PCR_N2_ENABLE;
- picl_shift = 2;
break;
case cheetah: