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-rw-r--r--arch/mips/netlogic/common/reset.S20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/mips/netlogic/common/reset.S b/arch/mips/netlogic/common/reset.S
index 701c4bcb9e47..e3e518974e0b 100644
--- a/arch/mips/netlogic/common/reset.S
+++ b/arch/mips/netlogic/common/reset.S
@@ -235,6 +235,26 @@ EXPORT(nlm_boot_siblings)
mfc0 v0, CP0_EBASE, 1
andi v0, 0x3ff /* v0 <- node/core */
+ /*
+ * Errata: to avoid potential live lock, setup IFU_BRUB_RESERVE
+ * when running 4 threads per core
+ */
+ andi v1, v0, 0x3 /* v1 <- thread id */
+ bnez v1, 2f
+ nop
+
+ /* thread 0 of each core. */
+ li t0, CKSEG1ADDR(RESET_DATA_PHYS)
+ lw t1, BOOT_THREAD_MODE(t0) /* t1 <- thread mode */
+ subu t1, 0x3 /* 4-thread per core mode? */
+ bnez t1, 2f
+ nop
+
+ li t0, IFU_BRUB_RESERVE
+ li t1, 0x55
+ mtcr t1, t0
+ _ehb
+2:
beqz v0, 4f /* boot cpu (cpuid == 0)? */
nop