ARC: Implement a function to sync and cleanup caches

Implement specialized function to clenup caches (and therefore
sync instruction and data caches) which can be used for cleanup before linux
launch or to sync caches during U-Boot self-relocation.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index fe75409..2269183 100644 (file)
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -31,6 +31,7 @@
 
 void cache_init(void);
 void flush_n_invalidate_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 4d4acff..f1ab344 100644 (file)
--- 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;
@@ -40,8 +41,7 @@ void arch_lmb_reserve(struct lmb *lmb)
 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 a5aae3d..5d7583d 100644 (file)
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -591,3 +591,26 @@ void flush_dcache_all(void)
        if (is_isa_arcv2() && !slc_data_bypass())
                __slc_entire_op(OP_FLUSH);
 }
+
+/*
+ * This is function to cleanup all caches (and therefore sync I/D caches) which
+ * can be used for cleanup before linux launch or to sync caches during
+ * relocation.
+ */
+void sync_n_cleanup_cache_all(void)
+{
+       __dc_entire_op(OP_FLUSH_N_INV);
+
+       /*
+        * If SL$ is bypassed for data it is used only for instructions,
+        * and we shouldn't flush it. So invalidate it instead of flush_n_inv.
+        */
+       if (is_isa_arcv2()) {
+               if (slc_data_bypass())
+                       __slc_entire_op(OP_INV);
+               else
+                       __slc_entire_op(OP_FLUSH_N_INV);
+       }
+
+       __ic_entire_invalidate();
+}

diff --git a/arch/arc/lib/init_helpers.c b/arch/arc/lib/init_helpers.c
index dbc8d68..435fe96 100644 (file)
--- a/arch/arc/lib/init_helpers.c
+++ b/arch/arc/lib/init_helpers.c
@@ -4,14 +4,14 @@
  * SPDX-License-Identifier:    GPL-2.0+
  */
 
+#include <asm/cache.h>
 #include <common.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
 int init_cache_f_r(void)
 {
-#ifndef CONFIG_SYS_DCACHE_OFF
-       flush_dcache_all();
-#endif
+       sync_n_cleanup_cache_all();
+
        return 0;
 }