From nobody Wed Nov 5 15:06:59 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 153479022526471.49505087049374; Mon, 20 Aug 2018 11:37:05 -0700 (PDT) Received: from localhost ([::1]:48606 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1frp32-0005BV-3A for importer@patchew.org; Mon, 20 Aug 2018 14:37:04 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44652) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1froxw-0000TK-5N for qemu-devel@nongnu.org; Mon, 20 Aug 2018 14:31:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1frol6-0001oH-Kh for qemu-devel@nongnu.org; Mon, 20 Aug 2018 14:18:34 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:51316 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1frol4-0001hT-7J for qemu-devel@nongnu.org; Mon, 20 Aug 2018 14:18:30 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 33E671A39CA; Mon, 20 Aug 2018 20:17:11 +0200 (CEST) Received: from rtrkw774-lin.domain.local (rtrkw774-lin.domain.local [10.10.13.43]) by mail.rt-rk.com (Postfix) with ESMTPSA id EE8E61A39CC; Mon, 20 Aug 2018 20:17:10 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Mon, 20 Aug 2018 20:16:53 +0200 Message-Id: <1534789014-8310-46-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1534789014-8310-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1534789014-8310-1-git-send-email-aleksandar.markovic@rt-rk.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PATCH v11 45/46] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, dnikolic@wavecomp.com, smarkovic@wavecomp.com, richard.henderson@linaro.org, philippe.mathieu.daude@gmail.com, amarkovic@wavecomp.com, pjovanovic@wavecomp.com, pburton@wavecomp.com, aurelien@aurel32.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" From: Stefan Markovic Fix passing argument for nanoMIPS bare metal related to the semihosting regime. Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Aleksandar Markovic Signed-off-by: Yongbok Kim Signed-off-by: Aleksandar Markovic Signed-off-by: Stefan Markovic --- hw/mips/mips_malta.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c index f261dd6..40041d5 100644 --- a/hw/mips/mips_malta.c +++ b/hw/mips/mips_malta.c @@ -630,8 +630,14 @@ static void write_bootloader_nanomips(uint8_t *base, i= nt64_t run_addr, /* nop */ =20 /* to_here: */ - stw_p(p++, 0x0080); stw_p(p++, 0x0002); + if (semihosting_get_argc()) { + /* Preserve a0 content as arguments have been passed */ + stw_p(p++, 0x8000); stw_p(p++, 0xc000); + /* nop */ + } else { + stw_p(p++, 0x0080); stw_p(p++, 0x0002); /* li a0,2 */ + } =20 stw_p(p++, 0xe3a0 | NM_HI1(ENVP_ADDR - 64)); =20 --=20 2.7.4