svn commit: r205004 - user/jmallett/octeon/sys/mips/cavium

[Juli Mallett]

Author: jmallett
Date: Thu Mar 11 08:30:05 2010
New Revision: 205004
URL: http://svn.freebsd.org/changeset/base/205004

Log:
  I would've expected the Octeon to have a double-counting timer as the code
  suggests, but at least on my CAM-0100 this seems to not be the case.  Pass 0
  to mips_timer_init_params for double_count instead of 1 -- now timings on my
  system match wall clock.
  
  The tick code really should be updated for 64-bit counter reads on the CPUs
  that support them -- I wonder if the t_delta wrongness is due to inaccuracy
  from the hand-rolled counter wrapping.

Modified:
  user/jmallett/octeon/sys/mips/cavium/octeon_machdep.c

Modified: user/jmallett/octeon/sys/mips/cavium/octeon_machdep.c
==============================================================================
--- user/jmallett/octeon/sys/mips/cavium/octeon_machdep.c	Thu Mar 11 08:03:56 2010	(r205003)
+++ user/jmallett/octeon/sys/mips/cavium/octeon_machdep.c	Thu Mar 11 08:30:05 2010	(r205004)
@@ -760,7 +760,7 @@ platform_start(__register_t a0, __regist
 		kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
 #endif
 	platform_counter_freq = octeon_get_clock_rate();
-	mips_timer_init_params(platform_counter_freq, 1);
+	mips_timer_init_params(platform_counter_freq, 0);
 }
 
 /* impSTART: This stuff should move back into the Cavium SDK */