From patchwork Wed Oct 4 16:10:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory CLEMENT X-Patchwork-Id: 730880 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3B3D1BDCE for ; Wed, 4 Oct 2023 16:10:54 +0000 (UTC) Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::224]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7A47C0; Wed, 4 Oct 2023 09:10:52 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id D2623E0006; Wed, 4 Oct 2023 16:10:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1696435851; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VOjmWr0mfjgBp7nTWHYGPwk6e22EOwSF4b0ZHDI/Irc=; b=mK6smk9vHL4Vz1l1in2vpkrJfRKPFK5FWJ/iGAp0VFPia3gMZAa1jSIoybLSXms4wEB9+5 EuY4Q042RL7K5FRQZieMtyubzN4Fvnyr8/udm4tmIqYNj91o0GAEaa9MN/80cprFJd0iYF tAT2DermcTvyHEMy2rrieelCWPFbTM/2D6JBQtyGWdjWdEg+AbBo8u6whRPOfBY9gI1LU4 EH5/7oXEYrasvjmvAxcI+ePVL6Hhe3PLrPI8cotMRE85SvO1BInV+MG/6j8olGOfNSMv5j ukHuI4V3mIF/9845SJCizcDJC74Z2HatyWu561L7nvPkKRTrQRMD21BgbOKPNw== From: Gregory CLEMENT To: Paul Burton , Thomas Bogendoerfer , linux-mips@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Vladimir Kondratiev , Tawfik Bayouk , Alexandre Belloni , =?utf-8?q?Th=C3=A9o_Lebr?= =?utf-8?q?un?= , Thomas Petazzoni , Gregory CLEMENT Subject: [PATCH 03/11] MIPS: support RAM beyond 32-bit Date: Wed, 4 Oct 2023 18:10:30 +0200 Message-Id: <20231004161038.2818327-4-gregory.clement@bootlin.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231004161038.2818327-1-gregory.clement@bootlin.com> References: <20231004161038.2818327-1-gregory.clement@bootlin.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: gregory.clement@bootlin.com X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net From: Vladimir Kondratiev Support platforms where RAM is mapped beyond 32-bit. The kernel parameter ddr32_alias allows to setup the alias to point outside the first 4 GB of memory. Signed-off-by: Vladimir Kondratiev Signed-off-by: Gregory CLEMENT --- arch/mips/kernel/smp-cps.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c index 47e76722a306..fcfb19487612 100644 --- a/arch/mips/kernel/smp-cps.c +++ b/arch/mips/kernel/smp-cps.c @@ -34,6 +34,16 @@ static unsigned __init core_vpe_count(unsigned int cluster, unsigned core) return min(smp_max_threads, mips_cps_numvps(cluster, core)); } +static int ddr32_alias; + +static int __init ddr32_alias_setup(char *str) +{ + get_option(&str, &ddr32_alias); + + return 0; +} +early_param("ddr32_alias", ddr32_alias_setup); + /** * plat_core_entry - query reset vector for NMI/reset * @@ -52,7 +62,7 @@ static u32 plat_core_entry(void) { #if defined(CONFIG_USE_XKPHYS) return (UNCAC_ADDR(mips_cps_core_entry) & 0xffffffff) - | CM_GCR_Cx_RESET_BASE_MODE; + | ddr32_alias | CM_GCR_Cx_RESET_BASE_MODE; #else return CKSEG1ADDR((unsigned long)mips_cps_core_entry); #endif