- Remove 'struct vmmeter' from 'struct pcpu', leaving only global vmmeter

  in place.  To do per-cpu stats, convert all fields that previously were
  maintained in the vmmeters that sit in pcpus to counter(9).
- Since some vmmeter stats may be touched at very early stages of boot,
  before we have set up UMA and we can do counter_u64_alloc(), provide an
  early counter mechanism:
  o Leave one spare uint64_t in struct pcpu, named pc_early_dummy_counter.
  o Point counter(9) fields of vmmeter to pcpu[0].pc_early_dummy_counter,
    so that at early stages of boot, before counters are allocated we already
    point to a counter that can be safely written to.
  o For sparc64 that required a whole dummy pcpu[MAXCPU] array.

Further related changes:
- Don't include vmmeter.h into pcpu.h.
- vm.stats.vm.v_swappgsout and vm.stats.vm.v_swappgsin changed to 64-bit,
  to match kernel representation.
- struct vmmeter hidden under _KERNEL, and only vmstat(1) is an exclusion.

This is based on benno@'s 4-year old patch:
https://lists.freebsd.org/pipermail/freebsd-arch/2013-July/014471.html

Reviewed by:	kib, gallatin, marius, lidl
Differential Revision:	https://reviews.freebsd.org/D10156

1 files changed, 4 insertions, 8 deletions

diff --git a/sys/sparc64/sparc64/exception.S b/sys/sparc64/sparc64/exception.S
index 8a1160ba80aa..dc5a7a0001e5 100644
--- a/sys/sparc64/sparc64/exception.S
+++ b/sys/sparc64/sparc64/exception.S
@@ -2476,9 +2476,8 @@ ENTRY(tl0_intr)
 	inc	%l1
 	stx	%l1, [%l0]
 
-	lduw	[PCPU(CNT) + V_INTR], %l0
-	inc	%l0
-	stw	%l0, [PCPU(CNT) + V_INTR]
+	call	counter_intr_inc
+	 nop
 
 	ba,a	%xcc, tl0_ret
 	 nop
@@ -2989,11 +2988,8 @@ ENTRY(tl1_intr)
 	add	%l5, %l4, %l4
 	ldx	[%l4], %l5
 	inc	%l5
-	stx	%l5, [%l4]
-
-	lduw	[PCPU(CNT) + V_INTR], %l4
-	inc	%l4
-	stw	%l4, [PCPU(CNT) + V_INTR]
+	call	counter_intr_inc
+	 stx	%l5, [%l4]
 
 	ldx	[%sp + SPOFF + CCFSZ + TF_Y], %l4