From: Tinghan Shen <tinghan.shen@mediatek.com> To: Bjorn Andersson <andersson@kernel.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, Tinghan Shen <tinghan.shen@mediatek.com> Cc: <linux-remoteproc@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-mediatek@lists.infradead.org>, <Project_Global_Chrome_Upstream_Group@mediatek.com> Subject: [PATCH v8 08/11] remoteproc: mediatek: Setup MT8195 SCP core 1 SRAM offset Date: Fri, 3 Mar 2023 16:33:52 +0800 [thread overview] Message-ID: <20230303083355.3378-9-tinghan.shen@mediatek.com> (raw) In-Reply-To: <20230303083355.3378-1-tinghan.shen@mediatek.com> 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 <tinghan.shen@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/remoteproc/mtk_common.h | 7 +++++++ drivers/remoteproc/mtk_scp.c | 27 +++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index f0c16553c00b..80be712a3583 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 +#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 diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 0ee161c1478c..049688c731f7 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -484,6 +484,9 @@ static int mt8195_scp_before_load(struct mtk_scp *scp) static int mt8195_scp_c1_before_load(struct mtk_scp *scp) { + u32 sec_ctrl; + struct mtk_scp *scp_c0; + scp_sram_power_on(scp->reg_base + MT8195_CPU1_SRAM_PD, 0); /* hold SCP in reset while loading FW. */ @@ -492,6 +495,30 @@ static int mt8195_scp_c1_before_load(struct mtk_scp *scp) /* enable MPU for all memory regions */ writel(0xff, scp->reg_base + MT8195_CORE1_MEM_ATT_PREDEF); + /* + * 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 core 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 bus. + * The shift action is tranparent to software. + */ + writel(0, scp->reg_base + MT8195_L2TCM_OFFSET_RANGE_0_LOW); + writel(scp->sram_size, scp->reg_base + MT8195_L2TCM_OFFSET_RANGE_0_HIGH); + + scp_c0 = list_first_entry(scp->cluster, struct mtk_scp, elem); + writel(scp->sram_phys - scp_c0->sram_phys, scp->reg_base + MT8195_L2TCM_OFFSET); + + /* enable SRAM offset when fetching instruction and data */ + sec_ctrl = readl(scp->reg_base + MT8195_SEC_CTRL); + sec_ctrl |= MT8195_CORE_OFFSET_ENABLE_I | MT8195_CORE_OFFSET_ENABLE_D; + writel(sec_ctrl, scp->reg_base + MT8195_SEC_CTRL); + return 0; } -- 2.18.0
WARNING: multiple messages have this Message-ID (diff)
From: Tinghan Shen <tinghan.shen@mediatek.com> To: Bjorn Andersson <andersson@kernel.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, Tinghan Shen <tinghan.shen@mediatek.com> Cc: <linux-remoteproc@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-mediatek@lists.infradead.org>, <Project_Global_Chrome_Upstream_Group@mediatek.com> Subject: [PATCH v8 08/11] remoteproc: mediatek: Setup MT8195 SCP core 1 SRAM offset Date: Fri, 3 Mar 2023 16:33:52 +0800 [thread overview] Message-ID: <20230303083355.3378-9-tinghan.shen@mediatek.com> (raw) In-Reply-To: <20230303083355.3378-1-tinghan.shen@mediatek.com> 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 <tinghan.shen@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/remoteproc/mtk_common.h | 7 +++++++ drivers/remoteproc/mtk_scp.c | 27 +++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index f0c16553c00b..80be712a3583 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 +#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 diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 0ee161c1478c..049688c731f7 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -484,6 +484,9 @@ static int mt8195_scp_before_load(struct mtk_scp *scp) static int mt8195_scp_c1_before_load(struct mtk_scp *scp) { + u32 sec_ctrl; + struct mtk_scp *scp_c0; + scp_sram_power_on(scp->reg_base + MT8195_CPU1_SRAM_PD, 0); /* hold SCP in reset while loading FW. */ @@ -492,6 +495,30 @@ static int mt8195_scp_c1_before_load(struct mtk_scp *scp) /* enable MPU for all memory regions */ writel(0xff, scp->reg_base + MT8195_CORE1_MEM_ATT_PREDEF); + /* + * 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 core 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 bus. + * The shift action is tranparent to software. + */ + writel(0, scp->reg_base + MT8195_L2TCM_OFFSET_RANGE_0_LOW); + writel(scp->sram_size, scp->reg_base + MT8195_L2TCM_OFFSET_RANGE_0_HIGH); + + scp_c0 = list_first_entry(scp->cluster, struct mtk_scp, elem); + writel(scp->sram_phys - scp_c0->sram_phys, scp->reg_base + MT8195_L2TCM_OFFSET); + + /* enable SRAM offset when fetching instruction and data */ + sec_ctrl = readl(scp->reg_base + MT8195_SEC_CTRL); + sec_ctrl |= MT8195_CORE_OFFSET_ENABLE_I | MT8195_CORE_OFFSET_ENABLE_D; + writel(sec_ctrl, scp->reg_base + MT8195_SEC_CTRL); + return 0; } -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-03-03 8:34 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-03 8:33 [PATCH v8 00/11] Add support for MT8195 SCP 2nd core Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 01/11] dt-bindings: remoteproc: mediatek: Improve the rpmsg subnode definition Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 02/11] arm64: dts: mediatek: Update the node name of SCP rpmsg subnode Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-14 10:04 ` AngeloGioacchino Del Regno 2023-03-03 8:33 ` [PATCH v8 03/11] dt-bindings: remoteproc: mediatek: Support MT8195 dual-core SCP Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 04/11] remoteproc: mediatek: Add MT8195 SCP core 1 operations Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 05/11] remoteproc: mediatek: Extract remoteproc initialization flow Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-15 17:34 ` Mathieu Poirier 2023-03-15 17:34 ` Mathieu Poirier 2023-03-15 17:35 ` Mathieu Poirier 2023-03-15 17:35 ` Mathieu Poirier 2023-03-03 8:33 ` [PATCH v8 06/11] remoteproc: mediatek: Probe multi-core SCP Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-14 9:42 ` AngeloGioacchino Del Regno 2023-03-16 21:07 ` Mathieu Poirier 2023-03-16 21:07 ` Mathieu Poirier 2023-03-23 2:02 ` TingHan Shen (沈廷翰) 2023-03-23 2:02 ` TingHan Shen (沈廷翰) 2023-03-03 8:33 ` [PATCH v8 07/11] remoteproc: mediatek: Control SCP core 1 by rproc subdevice Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen [this message] 2023-03-03 8:33 ` [PATCH v8 08/11] remoteproc: mediatek: Setup MT8195 SCP core 1 SRAM offset Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 09/11] remoteproc: mediatek: Handle MT8195 SCP core 1 watchdog timeout Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 10/11] remoteproc: mediatek: Refine ipi handler error message Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen 2023-03-03 8:33 ` [PATCH v8 11/11] arm64: dts: mediatek: mt8195: Add SCP 2nd core Tinghan Shen 2023-03-03 8:33 ` Tinghan Shen
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