diff options
Diffstat (limited to 'arch/openrisc/kernel/head.S')
| -rw-r--r-- | arch/openrisc/kernel/head.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/openrisc/kernel/head.S b/arch/openrisc/kernel/head.S index 4d878d13b860..3f1e9d168710 100644 --- a/arch/openrisc/kernel/head.S +++ b/arch/openrisc/kernel/head.S @@ -459,6 +459,15 @@ _start: l.ori r3,r0,0x1 l.mtspr r0,r3,SPR_SR + /* + * Start the TTCR as early as possible, so that the RNG can make use of + * measurements of boot time from the earliest opportunity. Especially + * important is that the TTCR does not return zero by the time we reach + * rand_initialize(). + */ + l.movhi r3,hi(SPR_TTMR_CR) + l.mtspr r0,r3,SPR_TTMR + CLEAR_GPR(r1) CLEAR_GPR(r2) CLEAR_GPR(r3) |