From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: Clement Leger <cleger@kalray.eu>,
Sascha Hauer <s.hauer@pengutronix.de>,
barebox@lists.infradead.org
Subject: Re: [PATCH 3/4] kvx: add D-cache inval and I-cache sync
Date: Wed, 24 Jun 2020 08:12:33 +0200 [thread overview]
Message-ID: <4a15f2e0-b818-a228-4084-e35171a856de@pengutronix.de> (raw)
In-Reply-To: <20200623193506.13716-4-cleger@kalray.eu>
On 6/23/20 9:35 PM, Clement Leger wrote:
> 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. Moreover add a D-cache invalidation
> routine to cleanup cache before booting.
>
> Signed-off-by: Clement Leger <cleger@kalray.eu>
> ---
> arch/kvx/include/asm/cache.h | 24 ++++++++++++++++++++++++
> 1 file changed, 24 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..efda37ebd
> --- /dev/null
> +++ b/arch/kvx/include/asm/cache.h
> @@ -0,0 +1,24 @@
> +/* 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();
> +}
ARCH=arm calls this sync_caches_for_execution. Using the same name
sounds like a good idea IMHO.
> +
> +static inline void dcache_inval(void)
> +{
> + __builtin_kvx_fence();
> + __builtin_kvx_dinval();
> +}
> +
> +#endif /* __KVX_CACHE_H */
>
--
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next prev parent reply other threads:[~2020-06-24 6:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 19:35 [PATCH 0/4] kvx: add elf bootm support Clement Leger
2020-06-23 19:35 ` [PATCH 1/4] common: bootm: allow letting IH_ARCH undefined Clement Leger
2020-06-23 19:35 ` [PATCH 2/4] common: Kconfig: remove MIPS dependency Clement Leger
2020-06-24 6:06 ` Ahmad Fatoum
2020-06-23 19:35 ` [PATCH 3/4] kvx: add D-cache inval and I-cache sync Clement Leger
2020-06-24 6:12 ` Ahmad Fatoum [this message]
2020-06-23 19:35 ` [PATCH 4/4] kvx: add support for elf loading using bootm Clement Leger
2020-06-24 6:17 ` Ahmad Fatoum
2020-06-24 7:15 ` Clément Leger
2020-06-29 8:15 ` Ahmad Fatoum
2020-06-29 8:23 ` Clément Leger
2020-06-29 8:29 ` Ahmad Fatoum
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