From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 13 Sep 2022 14:51:59 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oY5OR-003gOV-DO for lore@lore.pengutronix.de; Tue, 13 Sep 2022 14:51:59 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oY5OO-0007tF-1W for lore@pengutronix.de; Tue, 13 Sep 2022 14:51:58 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To: Cc:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+Uim4nPJVmwMaGQjmcAd/Za5WNB1HPaC6yD4teIQxtg=; b=RcYaGMvgCV6x3+RuHovgNTMsNj jzLFci/TQUglIgehyZtwF/D+VEtUDNGvDyhgR8CEPYZv2slsYbq9K+I/4z7GadEkx418kVAXPoqZ/ LCcRmbbO2HJG7+pRBqzN6XbZ92RNcLON41MJH/NNU+PQv6rcpBJBfciMmdM1IUuvFaRrNb0zT2wJc 12EeTQE9D8CXHyzHnUM/XXcFYcmLZJ1aFDIDwuYYa1QAcGBY82gU+HdEWXOyVNEHhEoOpfAzsM73K uT2rnHflUXs5c6x+1/uf5PhAIxPpJoxX4E3z4Zqt2dcgD827mFQcchmVPERsBMC+QXlrPD0x8+gC6 ATBLzaXw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oY5Mg-00ADGJ-07; Tue, 13 Sep 2022 12:50:10 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oY5MX-00ADAo-0u for barebox@lists.infradead.org; Tue, 13 Sep 2022 12:50:02 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oY5MT-0007L1-PJ for barebox@lists.infradead.org; Tue, 13 Sep 2022 14:49:57 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oY5MU-000VCl-He for barebox@lists.infradead.org; Tue, 13 Sep 2022 14:49:57 +0200 Received: from mfe by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oY5MR-005fms-Jc for barebox@lists.infradead.org; Tue, 13 Sep 2022 14:49:55 +0200 From: Marco Felsch To: barebox@lists.infradead.org Date: Tue, 13 Sep 2022 14:49:50 +0200 Message-Id: <20220913124954.1346533-3-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220913124954.1346533-1-m.felsch@pengutronix.de> References: <20220913124954.1346533-1-m.felsch@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220913_055001_106416_7C8B6F6E X-CRM114-Status: GOOD ( 14.09 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.5 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 2/6] RISC-V: add riscv_vendor_id() support X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) Add the support to query the vendorid which is stored within the mvendorid register. This register is only accessible from M-Mode so we need to use the sbi interface if we are running from S-Mode. Signed-off-by: Marco Felsch --- arch/riscv/include/asm/system.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/riscv/include/asm/system.h b/arch/riscv/include/asm/system.h index adf856f9e9..3eb50f63fd 100644 --- a/arch/riscv/include/asm/system.h +++ b/arch/riscv/include/asm/system.h @@ -5,6 +5,8 @@ #ifndef __ASSEMBLY__ +#include + #define RISCV_MODE_MASK 0x3 enum riscv_mode { RISCV_U_MODE = 0, @@ -42,6 +44,30 @@ static inline long __riscv_hartid(u32 flags) return hartid; } +static inline long __riscv_vendor_id(u32 flags) +{ + struct sbiret ret = { .error = -1 }; + long id; + + switch (__riscv_mode(flags)) { + case RISCV_M_MODE: + __asm__ volatile("csrr %0, mvendorid\n" : "=r"(id)); + return id; + case RISCV_S_MODE: + /* + * We need to use the sbi_ecall() since it can be that we got + * called without a working stack + */ + ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MVENDORID, + 0, 0, 0, 0, 0, 0); + if (!ret.error) + return ret.value; + default: + } + + return ret.error; +} + #ifndef __PBL__ extern unsigned barebox_riscv_pbl_flags; @@ -54,6 +80,11 @@ static inline long riscv_hartid(void) { return __riscv_hartid(barebox_riscv_pbl_flags); } + +static inline long riscv_vendor_id(void) +{ + return __riscv_vendor_id(barebox_riscv_pbl_flags); +} #endif #endif -- 2.30.2