svn commit: r365723 - head/sys/powerpc/powerpc

[Brandon Bergren]

Author: bdragon
Date: Mon Sep 14 15:20:37 2020
New Revision: 365723
URL: https://svnweb.freebsd.org/changeset/base/365723

Log:
  [PowerPC] Make cpu frequency detection endian-independent
  
  On ibm,extended-clock-frequency, ensure we be64toh() the value.
  
  On clock-frequency, remove the right-shifting hack (which was needed due to
  reading a 32 bit value into a 64 bit variable) and switch to OF_getencprop()
  for reading (which will handle endian conversion internally.)
  
  Reviewed by:	jhibbits (in irc)
  Sponsored by:	Tag1 Consulting, Inc.

Modified:
  head/sys/powerpc/powerpc/cpu.c

Modified: head/sys/powerpc/powerpc/cpu.c
==============================================================================
--- head/sys/powerpc/powerpc/cpu.c	Mon Sep 14 14:53:09 2020	(r365722)
+++ head/sys/powerpc/powerpc/cpu.c	Mon Sep 14 15:20:37 2020	(r365723)
@@ -72,6 +72,7 @@
 #include <sys/sysctl.h>
 #include <sys/sched.h>
 #include <sys/smp.h>
+#include <sys/endian.h>
 
 #include <machine/bus.h>
 #include <machine/cpu.h>
@@ -358,6 +359,7 @@ cpu_est_clockrate(int cpu_id, uint64_t *cps)
 	uint16_t	vers;
 	register_t	msr;
 	phandle_t	cpu, dev, root;
+	uint32_t	freq32;
 	int		res  = 0;
 	char		buf[8];
 
@@ -428,10 +430,11 @@ cpu_est_clockrate(int cpu_id, uint64_t *cps)
 				return (ENOENT);
 			if (OF_getprop(cpu, "ibm,extended-clock-frequency",
 			    cps, sizeof(*cps)) >= 0) {
+				*cps = be64toh(*cps);
 				return (0);
-			} else if (OF_getprop(cpu, "clock-frequency", cps, 
-			    sizeof(cell_t)) >= 0) {
-				*cps >>= 32;
+			} else if (OF_getencprop(cpu, "clock-frequency",
+			    &freq32, sizeof(freq32)) >= 0) {
+				*cps = freq32;
 				return (0);
 			} else {
 				return (ENOENT);