[MIPS] MT: Improved multithreading support.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/gdb-low.S b/arch/mips/kernel/gdb-low.S
index 235ad9f..10f28fb 100644
--- a/arch/mips/kernel/gdb-low.S
+++ b/arch/mips/kernel/gdb-low.S
@@ -283,11 +283,33 @@
*/
3:
+#ifdef CONFIG_MIPS_MT_SMTC
+ /* Read-modify write of Status must be atomic */
+ mfc0 t2, CP0_TCSTATUS
+ ori t1, t2, TCSTATUS_IXMT
+ mtc0 t1, CP0_TCSTATUS
+ andi t2, t2, TCSTATUS_IXMT
+ ehb
+ DMT 9 # dmt t1
+ jal mips_ihb
+ nop
+#endif /* CONFIG_MIPS_MT_SMTC */
mfc0 t0, CP0_STATUS
ori t0, 0x1f
xori t0, 0x1f
mtc0 t0, CP0_STATUS
-
+#ifdef CONFIG_MIPS_MT_SMTC
+ andi t1, t1, VPECONTROL_TE
+ beqz t1, 9f
+ nop
+ EMT # emt
+9:
+ mfc0 t1, CP0_TCSTATUS
+ xori t1, t1, TCSTATUS_IXMT
+ or t1, t1, t2
+ mtc0 t1, CP0_TCSTATUS
+ ehb
+#endif /* CONFIG_MIPS_MT_SMTC */
LONG_L v0, GDB_FR_STATUS(sp)
LONG_L v1, GDB_FR_EPC(sp)
mtc0 v0, CP0_STATUS