Implement specialized function to clenup caches (and therefore sync I/D caches) which can be used for cleanup before linux launch instead of flush_dcache_all/invalidate_icache_all pair. It also allow us to safely invalidate L1 D$ and SLC before linux launch.
Signed-off-by: Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com --- arch/arc/include/asm/cache.h | 1 + arch/arc/lib/bootm.c | 4 ++-- arch/arc/lib/cache.c | 10 ++++++++++ 3 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h index 6300676..7f1c247 100644 --- a/arch/arc/include/asm/cache.h +++ b/arch/arc/include/asm/cache.h @@ -32,6 +32,7 @@ void cache_init(void); void flush_n_invalidate_dcache_all(void); void sync_icache_dcache_all(void); +void sync_n_cleanup_cache_all(void);
static const inline int is_ioc_enabled(void) { diff --git a/arch/arc/lib/bootm.c b/arch/arc/lib/bootm.c index 9eef707..c6800cb 100644 --- a/arch/arc/lib/bootm.c +++ b/arch/arc/lib/bootm.c @@ -4,6 +4,7 @@ * SPDX-License-Identifier: GPL-2.0+ */
+#include <asm/cache.h> #include <common.h>
DECLARE_GLOBAL_DATA_PTR; @@ -45,8 +46,7 @@ int arch_fixup_fdt(void *blob) static int cleanup_before_linux(void) { disable_interrupts(); - flush_dcache_all(); - invalidate_icache_all(); + sync_n_cleanup_cache_all();
return 0; } diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c index 76602ae..c706fbd 100644 --- a/arch/arc/lib/cache.c +++ b/arch/arc/lib/cache.c @@ -501,3 +501,13 @@ void sync_icache_dcache_all(void) __dc_entire_op(OP_FLUSH); __ic_entire_invalidate(); } + +void sync_n_cleanup_cache_all(void) +{ + __dc_entire_op(OP_FLUSH_N_INV); + + if (is_isa_arcv2()) + __slc_entire_op(OP_FLUSH_N_INV); + + __ic_entire_invalidate(); +}