From: Clement Leger <cleger@kalray.eu>
To: Sascha Hauer <s.hauer@pengutronix.de>, barebox@lists.infradead.org
Cc: Clement Leger <cleger@kalray.eu>, Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v2 3/4] kvx: add I-cache and D-cache synchronisation
Date: Sun, 28 Jun 2020 17:51:07 +0200 [thread overview]
Message-ID: <20200628155108.29083-4-cleger@kalray.eu> (raw)
In-Reply-To: <20200628155108.29083-1-cleger@kalray.eu>
Before booting, we must make sure the I-cache is synchronized with the
D-cache to execute loaded instructions. In order to do that, add a
function which execute a fence to ensure every memory accesses have
been committed out of processor pipeline to memory and then invalidate
I-cache to reload from memory.
Signed-off-by: Clement Leger <cleger@kalray.eu>
---
arch/kvx/include/asm/cache.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
create mode 100644 arch/kvx/include/asm/cache.h
diff --git a/arch/kvx/include/asm/cache.h b/arch/kvx/include/asm/cache.h
new file mode 100644
index 000000000..a3314d157
--- /dev/null
+++ b/arch/kvx/include/asm/cache.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2019 Kalray Inc.
+ */
+
+#ifndef __KVX_CACHE_H
+#define __KVX_CACHE_H
+
+#include <linux/types.h>
+
+static inline void sync_dcache_icache(void)
+{
+ __builtin_kvx_fence();
+ __builtin_kvx_iinval();
+ __builtin_kvx_barrier();
+}
+
+#endif /* __KVX_CACHE_H */
--
2.17.1
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next prev parent reply other threads:[~2020-06-28 15:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-28 15:51 [PATCH v2 0/4] kvx: add elf bootm support Clement Leger
2020-06-28 15:51 ` [PATCH v2 1/4] common: bootm: allow building using undefined IH_ARCH Clement Leger
2020-06-28 15:51 ` [PATCH v2 2/4] common: Kconfig: remove MIPS dependency Clement Leger
2020-06-29 8:16 ` Ahmad Fatoum
2020-06-28 15:51 ` Clement Leger [this message]
2020-06-28 15:51 ` [PATCH v2 4/4] kvx: add support for elf loading using bootm Clement Leger
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