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@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