cpu_mcf52x2_cache.patch - Setup CACR, bit 5 set to 0 per Freescale chip errata (MCF5282DE, Rev. 6, 5/2009)

Signed-off-by: David Wu davidwu@arcturusnetworks.com Signed-off-by: Michael Durrant mdurrant@arcturusnetworks.com --- cpu/mcf52x2/cpu_init.c | 6 ++++-- cpu/mcf52x2/start.S | 5 ++++- 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/cpu/mcf52x2/cpu_init.c b/cpu/mcf52x2/cpu_init.c index 5b06930..60b55ce 100644 --- a/cpu/mcf52x2/cpu_init.c +++ b/cpu/mcf52x2/cpu_init.c @@ -609,8 +609,10 @@ void cpu_init_f(void)

#endif /* CONFIG_MONITOR_IS_IN_RAM */

- /* defer enabling cache until boot (see do_go) */ - /* icache_enable(); */ +#if defined(CONFIG_SYS_ENABLE_ICACHE) + /* enable instruction cache now */ + icache_enable(); +#endif }

/* diff --git a/cpu/mcf52x2/start.S b/cpu/mcf52x2/start.S index 0dd4de5..5540c95 100644 --- a/cpu/mcf52x2/start.S +++ b/cpu/mcf52x2/start.S @@ -417,7 +417,10 @@ icache_enable: movec %d0, %ACR0 /* Enable cache */ move.l #0xff00c000, %d0 /* Setup cache mask */ movec %d0, %ACR1 /* Enable cache */ - move.l #0x80400100, %d0 /* Setup cache mask, data cache disabel*/ + move.l #0x80400000, %d0 /* Setup cache mask, data cache disabled, + bit 5 set to 0 per chip errata + (MCF5282DE, Rev. 6, 5/2009) + */ movec %d0, %CACR /* Enable cache */ moveq #1, %d0 icache_state_access_1: -- 1.4.3.4