diff options
Diffstat (limited to 'cpu/mpc83xx/start.S')
| -rw-r--r-- | cpu/mpc83xx/start.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/cpu/mpc83xx/start.S b/cpu/mpc83xx/start.S index 75ad36cb3d..e452bfbc5e 100644 --- a/cpu/mpc83xx/start.S +++ b/cpu/mpc83xx/start.S @@ -483,6 +483,17 @@ init_e300_core: /* time t 10 */ 1: #endif /* CONFIG_WATCHDOG */ +#if defined(CONFIG_MASK_AER_AO) + /* Write the Arbiter Event Enable to mask Address Only traps. */ + /* This prevents the dcbz instruction from being trapped when */ + /* HID0_ABE Address Broadcast Enable is set and the MEMORY */ + /* COHERENCY bit is set in the WIMG bits, which is often */ + /* needed for PCI operation. */ + lwz r4, 0x0808(r3) + rlwinm r0, r4, 0, ~AER_AO + stw r0, 0x0808(r3) +#endif /* CONFIG_MASK_AER_AO */ + /* Initialize the Hardware Implementation-dependent Registers */ /* HID0 also contains cache control */ /*------------------------------------------------------*/ |
