From nobody Thu Nov 14 17:23:39 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 170F0CA0FE1 for ; Fri, 1 Sep 2023 08:10:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348614AbjIAIKN (ORCPT ); Fri, 1 Sep 2023 04:10:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233301AbjIAIKJ (ORCPT ); Fri, 1 Sep 2023 04:10:09 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F061A10F2; Fri, 1 Sep 2023 01:09:59 -0700 (PDT) X-UUID: ee4e1fb8489e11ee8051498923ad61e6-20230901 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=pax37zV2K6BNOW8JSl+2c2yAfQG1Ki2z47LZTtx7S60=; b=dEtfwRyeJ3d+ym9mON4JynmmEoTgzLtYVLlNYZKK/GGxdm/foBMQ69KoArAZwZ0cxYvq6wDPysYAOsD0771pkFekXBhFoGEXhyJ5b0mkOI7khpCrqhhXOZ2sjBX9kp5rXHnAz6NY3wOm2nVXcL+6bRPpSSNUMaFEtKSNnsH8XCo=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.31,REQID:90db0517-c96a-45e8-b7bc-cc8b7769c431,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:0ad78a4,CLOUDID:0af90020-33fd-4aaa-bb43-d3fd68d9d5ae,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO, DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: ee4e1fb8489e11ee8051498923ad61e6-20230901 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 964298345; Fri, 01 Sep 2023 16:09:53 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 1 Sep 2023 16:09:53 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 1 Sep 2023 16:09:53 +0800 From: Tinghan Shen To: Bjorn Andersson , Mathieu Poirier , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , "Tinghan Shen" CC: , , , , , Subject: [PATCH v17 10/14] remoteproc: mediatek: Setup MT8195 SCP core 1 SRAM offset Date: Fri, 1 Sep 2023 16:09:31 +0800 Message-ID: <20230901080935.14571-11-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230901080935.14571-1-tinghan.shen@mediatek.com> References: <20230901080935.14571-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Because MT8195 SCP core 0 and core 1 both boot from head of SRAM and have the same viewpoint of SRAM, SCP has a "core 1 SRAM offset" configuration to control the access destination of SCP core 1 to boot core 1 from different SRAM location. The "core 1 SRAM offset" configuration is composed by a range and an offset. It works like a simple memory mapped mechanism. When SCP core 1 accesses a SRAM address located in the range, the SCP bus adds the configured offset to the address to shift the physical destination address on SCP SRAM. This shifting is transparent to the software running on SCP core 1. Signed-off-by: Tinghan Shen Reviewed-by: AngeloGioacchino Del Regno --- drivers/remoteproc/mtk_common.h | 7 +++++++ drivers/remoteproc/mtk_scp.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_commo= n.h index fea05bbba9aa..3d6b53b9f374 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -65,6 +65,13 @@ #define MT8195_CORE1_MEM_ATT_PREDEF 0x20008 #define MT8195_CORE1_WDT_CFG 0x20034 =20 +#define MT8195_SEC_CTRL 0x85000 +#define MT8195_CORE_OFFSET_ENABLE_D BIT(13) +#define MT8195_CORE_OFFSET_ENABLE_I BIT(12) +#define MT8195_L2TCM_OFFSET_RANGE_0_LOW 0x850b0 +#define MT8195_L2TCM_OFFSET_RANGE_0_HIGH 0x850b4 +#define MT8195_L2TCM_OFFSET 0x850d0 + #define SCP_FW_VER_LEN 32 #define SCP_SHARE_BUFFER_SIZE 288 =20 diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 59d9182a8d1e..db5b15f5f8c1 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -495,6 +495,10 @@ static int mt8195_scp_before_load(struct mtk_scp *scp) =20 static int mt8195_scp_c1_before_load(struct mtk_scp *scp) { + u32 sec_ctrl; + struct mtk_scp *scp_c0; + struct mtk_scp_of_cluster *scp_cluster =3D scp->cluster; + scp->data->scp_reset_assert(scp); =20 mt8195_scp_l2tcm_on(scp); @@ -504,6 +508,30 @@ static int mt8195_scp_c1_before_load(struct mtk_scp *s= cp) /* enable MPU for all memory regions */ writel(0xff, scp->cluster->reg_base + MT8195_CORE1_MEM_ATT_PREDEF); =20 + /* + * The L2TCM_OFFSET_RANGE and L2TCM_OFFSET shift the destination address + * on SRAM when SCP core 1 accesses SRAM. + * + * This configuration solves booting the SCP core 0 and core 1 from + * different SRAM address because core 0 and core 1 both boot from + * the head of SRAM by default. this must be configured before boot SCP c= ore 1. + * + * The value of L2TCM_OFFSET_RANGE is from the viewpoint of SCP core 1. + * When SCP core 1 issues address within the range (L2TCM_OFFSET_RANGE), + * the address will be added with a fixed offset (L2TCM_OFFSET) on the bu= s. + * The shift action is tranparent to software. + */ + writel(0, scp->cluster->reg_base + MT8195_L2TCM_OFFSET_RANGE_0_LOW); + writel(scp->sram_size, scp->cluster->reg_base + MT8195_L2TCM_OFFSET_RANGE= _0_HIGH); + + scp_c0 =3D list_first_entry(&scp_cluster->mtk_scp_list, struct mtk_scp, e= lem); + writel(scp->sram_phys - scp_c0->sram_phys, scp->cluster->reg_base + MT819= 5_L2TCM_OFFSET); + + /* enable SRAM offset when fetching instruction and data */ + sec_ctrl =3D readl(scp->cluster->reg_base + MT8195_SEC_CTRL); + sec_ctrl |=3D MT8195_CORE_OFFSET_ENABLE_I | MT8195_CORE_OFFSET_ENABLE_D; + writel(sec_ctrl, scp->cluster->reg_base + MT8195_SEC_CTRL); + return 0; } =20 --=20 2.18.0