[U-Boot] [PATCH v3 3/4] api: FreeBSD: flush cache before starting

[Emmanuel Vadot]

From: Warner Losh <imp at freebsd.org>

FreeBSD loader(8) just loaded code to some random location that may
contain stale icache entries.
FreeBSD Kernel needs the icache and dcache flushed.
Before running either one of them, flush the icache and dcache.

Signed-off-by: Emmanuel Vadot <manu at bidouilliste.com>
---
 api/api.c  | 5 +++++
 cmd/boot.c | 4 ++++
 cmd/elf.c  | 5 +++++
 3 files changed, 14 insertions(+)

diff --git a/api/api.c b/api/api.c
index c368511704..88b5df77c0 100644
--- a/api/api.c
+++ b/api/api.c
@@ -290,6 +290,11 @@ static int API_dev_close(va_list ap)
 	if (!err)
 		di->state = DEV_STA_CLOSED;
 
+	if (dcache_status())
+		flush_dcache_all();
+	if (icache_status())
+		invalidate_icache_all();
+
 	return err;
 }
 
diff --git a/cmd/boot.c b/cmd/boot.c
index 72f2cf362d..b66ae67fcb 100644
--- a/cmd/boot.c
+++ b/cmd/boot.c
@@ -19,6 +19,10 @@ __attribute__((weak))
 unsigned long do_go_exec(ulong (*entry)(int, char * const []), int argc,
 				 char * const argv[])
 {
+	if (dcache_status())
+		flush_dcache_all();
+	if (icache_status())
+		invalidate_icache_all();
 	return entry (argc, argv);
 }
 
diff --git a/cmd/elf.c b/cmd/elf.c
index e4c6535111..e98a798203 100644
--- a/cmd/elf.c
+++ b/cmd/elf.c
@@ -109,6 +109,11 @@ static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
 {
 	unsigned long ret;
 
+	if (dcache_status())
+		flush_dcache_all();
+	if (icache_status())
+		invalidate_icache_all();
+
 	/*
 	 * pass address parameter as argv[0] (aka command name),
 	 * and all remaining args
-- 
2.11.0