diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2009-02-20 18:22:41 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2009-02-20 18:30:42 +0100 |
| commit | e983361aed49e29625712aadfb0fae36cb670a12 (patch) | |
| tree | ce9a584cc7c6a47b669014d6c41f3c61dd16b105 /board | |
| parent | b48ad93f8ebb98f499c17163f1a20517f33d9d11 (diff) | |
| download | barebox-e983361aed49e29625712aadfb0fae36cb670a12.tar.gz barebox-e983361aed49e29625712aadfb0fae36cb670a12.tar.xz | |
pcm043: add some startup code from Eboot
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'board')
| -rw-r--r-- | board/pcm043/lowlevel_init.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/board/pcm043/lowlevel_init.S b/board/pcm043/lowlevel_init.S index b176432dc0..6f64ecfbb0 100644 --- a/board/pcm043/lowlevel_init.S +++ b/board/pcm043/lowlevel_init.S @@ -63,6 +63,7 @@ board_init_lowlevel: mrc 15, 0, r0, c1, c0, 1 orr r0, r0, #7 +// orr r0, r0, #(1 << 31) /* disable hit under miss (Errata 364296) */ mcr 15, 0, r0, c1, c0, 1 orr r1, r1, #(1<<11) /* Flow prediction (Z) */ @@ -74,6 +75,14 @@ board_init_lowlevel: mov r0, #0 mcr 15, 0, r0, c15, c2, 4 + /* + * Branch predicition is now enabled. Flush the BTAC to ensure a valid + * starting point. Don't flush BTAC while it is disabled to avoid + * ARM1136 erratum 408023. + */ + mov r0, #0 + mcr p15, 0, r0, c7, c5, 6 /* flush entire BTAC */ + mov r0, #0 mcr 15, 0, r0, c7, c7, 0 /* invalidate I cache and D cache */ mcr 15, 0, r0, c8, c7, 0 /* invalidate TLBs */ |