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[104.57.184.186]) by smtp.gmail.com with ESMTPSA id 64sm8714987oob.12.2021.03.17.12.14.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Mar 2021 12:14:43 -0700 (PDT) Date: Wed, 17 Mar 2021 14:14:41 -0500 From: Bjorn Andersson To: Tzung-Bi Shih Cc: ohad@wizery.com, linux-remoteproc@vger.kernel.org, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, Tinghan Shen Subject: Re: [PATCH] remoteproc/mediatek: set to DEVAPC domain 3 for MT8192 SCP Message-ID: References: <20210317034311.2281708-1-tzungbi@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210317034311.2281708-1-tzungbi@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org On Tue 16 Mar 22:43 CDT 2021, Tzung-Bi Shih wrote: > DEVAPC (device access permission control) is a MPU (memory protection > unit) in MT8192. > > To restrict SCP accesses to a specific memory range, sets SCP to DEVAPC > domain 3. ATF (Arm trusted firmware) should setup memory range for the > domain. > > Signed-off-by: Tinghan Shen As written here Tinghan is the author of the commit, but the author of the patch is Tzung-Bi. Please resolve this. Regards, Bjorn > Signed-off-by: Tzung-Bi Shih > --- > drivers/remoteproc/mtk_common.h | 2 ++ > drivers/remoteproc/mtk_scp.c | 3 +++ > 2 files changed, 5 insertions(+) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index 61901f5efa05..2aa9fdf5e59b 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -51,6 +51,8 @@ > #define MT8192_CORE0_WDT_IRQ 0x10030 > #define MT8192_CORE0_WDT_CFG 0x10034 > > +#define MT8192_SCP_DEVAPC_DOMAIN 0x85080 > + > #define SCP_FW_VER_LEN 32 > #define SCP_SHARE_BUFFER_SIZE 288 > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 9679cc26895e..50bdec5a97e3 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -374,6 +374,9 @@ static int mt8192_scp_before_load(struct mtk_scp *scp) > /* enable MPU for all memory regions */ > writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > > + /* set to DEVAPC (device access permission control) domain 3 */ > + writel(3, scp->reg_base + MT8192_SCP_DEVAPC_DOMAIN); > + > return 0; > } > > -- > 2.31.0.rc2.261.g7f71774620-goog >