diff options
Diffstat (limited to 'arch/mips/netlogic/common/reset.S')
| -rw-r--r-- | arch/mips/netlogic/common/reset.S | 20 |
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 |