tee: optee: sync cache on pre-reloc OP-TEE invocation
This change ensures both U-Boot and OP-TEE see the same content
from shared memory when OP-TEE is invoked prior U-Boot relocation.
This change is required since U-Boot may execute with data cache off
while OP-TEE always enables cache on memory shared with U-Boot.
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/drivers/tee/tee-uclass.c b/drivers/tee/tee-uclass.c
index cb1b28e..52412a4 100644
--- a/drivers/tee/tee-uclass.c
+++ b/drivers/tee/tee-uclass.c
@@ -1,15 +1,17 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * Copyright (c) 2018 Linaro Limited
+ * Copyright (c) 2018-2020 Linaro Limited
*/
#define LOG_CATEGORY UCLASS_TEE
#include <common.h>
+#include <cpu_func.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <tee.h>
+#include <asm/cache.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
@@ -235,3 +237,18 @@
d[7] = s->time_hi_and_version;
memcpy(d + 8, s->clock_seq_and_node, sizeof(s->clock_seq_and_node));
}
+
+void tee_flush_all_shm_dcache(struct udevice *dev)
+{
+ struct tee_uclass_priv *priv = dev_get_uclass_priv(dev);
+ struct tee_shm *s;
+
+ list_for_each_entry(s, &priv->list_shm, link) {
+ ulong start = rounddown((ulong)s->addr,
+ CONFIG_SYS_CACHELINE_SIZE);
+ ulong end = roundup((ulong)s->addr + s->size,
+ CONFIG_SYS_CACHELINE_SIZE);
+
+ flush_dcache_range(start, end);
+ }
+}