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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-11-21 09:46:58 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-12-03 13:17:11 +0100 |
| commit | c6d35ad46b423e12c80b2616b5898357dcd0b835 (patch) | |
| tree | 68aa150726c654413bc5cc2a9558c9f821a58b85 | |
| parent | bsp/mpc55xx: Set PPC_EXC_CONFIG_BOOKE_ONLY (diff) | |
| download | rtems-c6d35ad46b423e12c80b2616b5898357dcd0b835.tar.bz2 | |
bsp/mpc55xx: Errata e4396 for e200z7
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start.S | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start.S b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start.S index 77c9d845a6..e8ae3c0db4 100644 --- a/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start.S +++ b/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start.S @@ -170,9 +170,17 @@ _start: ori r3, r3, 0x4000 mtspr HID0, r3 - /* Enable branch prediction */ - LWI r3, FSL_EIS_BUCSR_BBFI | FSL_EIS_BUCSR_BPEN + /* + * Enable branch prediction. + * + * Errata e4396: e200z7: Erroneous Address Fetch + * + * The propose workaround does not work. + */ +#if MPC55XX_CHIP_FAMILY != 567 + LWI r3, FSL_EIS_BUCSR_BBFI | FSL_EIS_BUCSR_BALLOC_ALL | FSL_EIS_BUCSR_BPRED_NOT_TAKEN | FSL_EIS_BUCSR_BPEN mtspr FSL_EIS_BUCSR, r3 +#endif #endif /* MPC55XX_NEEDS_LOW_LEVEL_INIT */ |