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| author | Alexey Brodkin <abrodkin@synopsys.com> | 2017-11-17 16:02:17 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2017-11-24 19:38:23 +0300 |
| commit | f2a226780fa0e4055bec636b8108bf7e80951174 (patch) | |
| tree | 3993a46a82b2b94350a438e6bae0bd717761433a /arch | |
| parent | d764a20f2bcab2e76bce0751ed125b0c32f9d82f (diff) | |
| download | u-boot-f2a226780fa0e4055bec636b8108bf7e80951174.tar.gz u-boot-f2a226780fa0e4055bec636b8108bf7e80951174.tar.bz2 u-boot-f2a226780fa0e4055bec636b8108bf7e80951174.zip | |
arc: cache: Add required NOPs after invalidation of instruction cache
As per ARC HS databook (see chapter 5.3.3.2) it is required to add
3 NOPs after each write to IC_IVIC which we do from now on.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Eugeniy Paltsev <paltsev@synopsys.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arc/lib/cache.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c index cbae27e9fc..d8741fe959 100644 --- a/arch/arc/lib/cache.c +++ b/arch/arc/lib/cache.c @@ -278,6 +278,13 @@ void invalidate_icache_all(void) /* Any write to IC_IVIC register triggers invalidation of entire I$ */ if (icache_status()) { write_aux_reg(ARC_AUX_IC_IVIC, 1); + /* + * As per ARC HS databook (see chapter 5.3.3.2) + * it is required to add 3 NOPs after each write to IC_IVIC. + */ + __builtin_arc_nop(); + __builtin_arc_nop(); + __builtin_arc_nop(); read_aux_reg(ARC_AUX_IC_CTRL); /* blocks */ } } |