[OpenBIOS] [commit] r1057 - trunk/openbios-devel/arch/sparc32
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svn at openbios.org
Sat May 12 13:43:57 CEST 2012
Author: blueswirl
Date: Sat May 12 13:43:57 2012
New Revision: 1057
URL: http://tracker.coreboot.org/trac/openbios/changeset/1057
Log:
Sparc32: avoid problems with SMP table
Check CPU ID if we're running on boot CPU. If so,
don't use SMP table information since it may contain
uninitialized or garbage values.
Signed-off-by: Blue Swirl <blauwirbel at gmail.com>
Modified:
trunk/openbios-devel/arch/sparc32/entry.S
Modified: trunk/openbios-devel/arch/sparc32/entry.S
==============================================================================
--- trunk/openbios-devel/arch/sparc32/entry.S Sat Apr 28 15:35:06 2012 (r1056)
+++ trunk/openbios-devel/arch/sparc32/entry.S Sat May 12 13:43:57 2012 (r1057)
@@ -126,12 +126,23 @@
set 0x2000, %g3
sub %g1, %g3, %g6
+ ! Check if this is the boot CPU and skip SMP table check if yes
+ ! XXX: not all CPUs should have MXCC
+ set 0x1c00f00, %g2
+ ldda [%g2] ASI_CONTROL, %g2
+ srl %g3, 24, %g7
+ sub %g7, 8, %g7
+ tst %g7
+ bz skip_table
+ nop
+
! Calculate SMP table location
set 0x1f0c, %g2
add %g6, %g2, %g2 ! valid?
lda [%g2] ASI_M_BYPASS, %g7
sta %g0, [%g2] ASI_M_BYPASS
+skip_table:
! Get machine ID from configuration device
mov FW_CFG_MACHINE_ID, %g2
sub %g5, 2, %g5
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