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When initialising the CP0 status register during boot on 64-bit MIPS,

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set all three of the kernel, supervisor, and user-mode 64-bit mode
flags.  While FreeBSD does not currently use the supervisor ring (and
hence this is effectively a NOP on most systems), doing this avoids
triggering an exception on 64-bit MIPS CPUs that don't support 32-bit
compatibility mode, and therefore don't allow clearing the SX bit.

Reviewed by:	gonzo
MFC after:	3 days
Sponsored by:	DARPA, SRI International
This commit is contained in:
Robert Watson 2012-02-14 20:34:25 +00:00
parent 3c7c299133
commit 79f9811409
1 changed files with 1 additions and 1 deletions
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2
sys/mips/mips/locore.S
View File

@ -118,7 +118,7 @@ VECTOR(_locore, unknown)
*/
li t1, MIPS_SR_COP_1_BIT
#ifdef __mips_n64
or t1, MIPS_SR_KX | MIPS_SR_UX
or t1, MIPS_SR_KX | MIPS_SR_SX | MIPS_SR_UX
#endif
#endif
/*