From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 44B3AD2ED0F for ; Tue, 20 Jan 2026 09:31:06 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vi83f-0003Og-V8; Tue, 20 Jan 2026 04:29:55 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vi83e-0003N0-8R; Tue, 20 Jan 2026 04:29:54 -0500 Received: from mail.aspeedtech.com ([211.20.114.72] helo=TWMBX01.aspeed.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vi83c-0005eG-VO; Tue, 20 Jan 2026 04:29:54 -0500 Received: from TWMBX01.aspeed.com (192.168.0.62) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Tue, 20 Jan 2026 17:29:40 +0800 Received: from mail.aspeedtech.com (192.168.10.10) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server id 15.2.1748.10 via Frontend Transport; Tue, 20 Jan 2026 17:29:40 +0800 To: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Peter Maydell , Steven Lee , Troy Lee , Andrew Jeffery , "Joel Stanley" , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: , , Subject: [PATCH v1 02/11] hw/arm/ast27x0: Start SSP in powered-off state to match hardware behavior Date: Tue, 20 Jan 2026 17:29:27 +0800 Message-ID: <20260120092939.2708302-3-jamin_lin@aspeedtech.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260120092939.2708302-1-jamin_lin@aspeedtech.com> References: <20260120092939.2708302-1-jamin_lin@aspeedtech.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Received-SPF: pass client-ip=211.20.114.72; envelope-from=jamin_lin@aspeedtech.com; helo=TWMBX01.aspeed.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_FAIL=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jamin Lin From: Jamin Lin via Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org In the previous design, both the PSP and SSP were started together during SoC initialization. However, on real hardware, the SSP begins in a powered-off state. The typical boot sequence involves the PSP powering up first, loading the SSP firmware binary into shared memory via DRAM remap, and then releasing the SSP reset and enabling it through SCU control registers. To more accurately model this behavior in QEMU, this commit sets the "start-powered-off" property for the SSP's ARMv7M core. This change ensures the SSP remains off until explicitly enabled via the SCU, simulating the real-world flow where the PSP controls SSP boot through SCU interaction. Signed-off-by: Jamin Lin --- hw/arm/aspeed_ast27x0-ssp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/arm/aspeed_ast27x0-ssp.c b/hw/arm/aspeed_ast27x0-ssp.c index cee937b37e..cba59ae11a 100644 --- a/hw/arm/aspeed_ast27x0-ssp.c +++ b/hw/arm/aspeed_ast27x0-ssp.c @@ -165,6 +165,13 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState *dev_soc, Error **errp) qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk); object_property_set_link(OBJECT(&a->armv7m), "memory", OBJECT(s->memory), &error_abort); + /* + * The SSP starts in a powered-down state and can be powered up + * by setting the SSP Control Register through the SCU + * (System Control Unit) + */ + object_property_set_bool(OBJECT(&a->armv7m), "start-powered-off", true, + &error_abort); sysbus_realize(SYS_BUS_DEVICE(&a->armv7m), &error_abort); /* SDRAM */ -- 2.43.0 From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6A02ED2ED0F for ; Tue, 20 Jan 2026 09:33:02 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vi83g-0003Ov-B8; Tue, 20 Jan 2026 04:29:56 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vi83e-0003N0-8R; Tue, 20 Jan 2026 04:29:54 -0500 Received: from mail.aspeedtech.com ([211.20.114.72] helo=TWMBX01.aspeed.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vi83c-0005eG-VO; Tue, 20 Jan 2026 04:29:54 -0500 Received: from TWMBX01.aspeed.com (192.168.0.62) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Tue, 20 Jan 2026 17:29:40 +0800 Received: from mail.aspeedtech.com (192.168.10.10) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server id 15.2.1748.10 via Frontend Transport; Tue, 20 Jan 2026 17:29:40 +0800 To: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Peter Maydell , Steven Lee , Troy Lee , Andrew Jeffery , "Joel Stanley" , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: , , Subject: [PATCH v1 02/11] hw/arm/ast27x0: Start SSP in powered-off state to match hardware behavior Date: Tue, 20 Jan 2026 17:29:27 +0800 Message-ID: <20260120092939.2708302-3-jamin_lin@aspeedtech.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260120092939.2708302-1-jamin_lin@aspeedtech.com> References: <20260120092939.2708302-1-jamin_lin@aspeedtech.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Received-SPF: pass client-ip=211.20.114.72; envelope-from=jamin_lin@aspeedtech.com; helo=TWMBX01.aspeed.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_FAIL=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jamin Lin From: Jamin Lin via qemu development Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org In the previous design, both the PSP and SSP were started together during SoC initialization. However, on real hardware, the SSP begins in a powered-off state. The typical boot sequence involves the PSP powering up first, loading the SSP firmware binary into shared memory via DRAM remap, and then releasing the SSP reset and enabling it through SCU control registers. To more accurately model this behavior in QEMU, this commit sets the "start-powered-off" property for the SSP's ARMv7M core. This change ensures the SSP remains off until explicitly enabled via the SCU, simulating the real-world flow where the PSP controls SSP boot through SCU interaction. Signed-off-by: Jamin Lin --- hw/arm/aspeed_ast27x0-ssp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/arm/aspeed_ast27x0-ssp.c b/hw/arm/aspeed_ast27x0-ssp.c index cee937b37e..cba59ae11a 100644 --- a/hw/arm/aspeed_ast27x0-ssp.c +++ b/hw/arm/aspeed_ast27x0-ssp.c @@ -165,6 +165,13 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState *dev_soc, Error **errp) qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk); object_property_set_link(OBJECT(&a->armv7m), "memory", OBJECT(s->memory), &error_abort); + /* + * The SSP starts in a powered-down state and can be powered up + * by setting the SSP Control Register through the SCU + * (System Control Unit) + */ + object_property_set_bool(OBJECT(&a->armv7m), "start-powered-off", true, + &error_abort); sysbus_realize(SYS_BUS_DEVICE(&a->armv7m), &error_abort); /* SDRAM */ -- 2.43.0