From nobody Tue Feb 10 11:33:13 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1646911817997141.53672510124943; Thu, 10 Mar 2022 03:30:17 -0800 (PST) Received: from localhost ([::1]:33472 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nSGzo-0007yT-W1 for importer@patchew.org; Thu, 10 Mar 2022 06:30:17 -0500 Received: from eggs.gnu.org ([209.51.188.92]:50590) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nSGxE-0004zZ-Cr for qemu-devel@nongnu.org; Thu, 10 Mar 2022 06:27:36 -0500 Received: from [2607:f8b0:4864:20::433] (port=35329 helo=mail-pf1-x433.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nSGxC-0007vK-AE for qemu-devel@nongnu.org; Thu, 10 Mar 2022 06:27:36 -0500 Received: by mail-pf1-x433.google.com with SMTP id a5so4867012pfv.2 for ; Thu, 10 Mar 2022 03:27:33 -0800 (PST) Received: from localhost.localdomain (174-21-142-130.tukw.qwest.net. [174.21.142.130]) by smtp.gmail.com with ESMTPSA id js15-20020a17090b148f00b001bfc8614b93sm3114977pjb.1.2022.03.10.03.27.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Mar 2022 03:27:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JwvNUZim2yApAOIks/gNVf1oLVx5CVGA+91qmxfeNYY=; b=Ny/2s4jhqYmWx7BbT/XrJ3Nk6R4IBdravzVIYmVegrzcB1U6Bc9KKid3D5RCidAput UQUnoAHW+RxUN5087+3trXlIqgFgRQunH/hkw/1bto58uwNdK7pr86Aj6QYj/+9RfJDf U5x+mXvoS9Ruppx9ehGjtYAMOaEcBy3y+w9vi/dBNUdmL8nGzBDzM623027YJ6BqI330 omHcv35ay0fuXd9Cx5Rxo2TQd25oV1vE8q+DQjvzW9EGl4VGQsiQpyNaPUyDmlDehfk7 tFl7KxsnfUQAPQRkSzLDRvkQ7PSS0Nv4LaYNglGppcaUk52NsYXA+dshhZJC0LtT/XhC mTQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JwvNUZim2yApAOIks/gNVf1oLVx5CVGA+91qmxfeNYY=; b=KXPg/YmMgQUvxhjRoSO7QSgKBjSaRB+ydb6Uuoa/0XSssZWtWkxnLEMxgcbKmospIR H3qz3ZTbDjlhER+LQWXdUckUO2yHEbAZi1UlmSypWFvf+1dArj50V3y/a2WCH3f/SshC a9xnbQ4noSvUiMJNvAtTb8kdmk7wBrRxE3KX4gtJ4jKuJOastBExjJSc/AEZSB8+8BuS zd2ezfBS6Xs0M3Qz0bcIau1NswkYqp7pKJOvnbKVEfEmWTWocW2gzD4EUsF0TKwvSmSV OEWVfwoHaEDl5h/k/v1Bz1jhwCK+pCqfyKGsxFYiumcuyRubaIrKESilfbPDLgIeovwq is1g== X-Gm-Message-State: AOAM533M8j4Ma4tiYjpS45KNhJr+njFKDHdX40R2hHV3FlnJAp8nxGCB ZiICUr6vNrM3ZTSap8eWRiB1jqKELzzyKg== X-Google-Smtp-Source: ABdhPJz0FJwKglVJ8eUw+l1fGg0+NFWUC6oMjdfjnwH+rwj8zwkO0nnf7Q/TjbWpWwKIU5rO7RoqCQ== X-Received: by 2002:a62:7c58:0:b0:4f6:ebf1:e78d with SMTP id x85-20020a627c58000000b004f6ebf1e78dmr4625994pfc.18.1646911652862; Thu, 10 Mar 2022 03:27:32 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v5 05/48] target/nios2: Split out helper for eret instruction Date: Thu, 10 Mar 2022 03:26:42 -0800 Message-Id: <20220310112725.570053-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220310112725.570053-1-richard.henderson@linaro.org> References: <20220310112725.570053-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::433 (failed) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::433; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x433.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marex@denx.de, peter.maydell@linaro.org, amir.gonnen@neuroblade.ai Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1646911819689100001 Content-Type: text/plain; charset="utf-8" From: Amir Gonnen The implementation of eret will become much more complex with the introduction of shadow registers. Reviewed-by: Peter Maydell Signed-off-by: Amir Gonnen Message-Id: <20220303153906.2024748-3-amir.gonnen@neuroblade.ai> [rth: Split out of a larger patch for shadow register sets. Directly exit to the cpu loop from the helper.] Signed-off-by: Richard Henderson --- target/nios2/helper.h | 1 + target/nios2/op_helper.c | 9 +++++++++ target/nios2/translate.c | 10 ++++++---- 3 files changed, 16 insertions(+), 4 deletions(-) diff --git a/target/nios2/helper.h b/target/nios2/helper.h index a44ecfdf7a..525b6b685b 100644 --- a/target/nios2/helper.h +++ b/target/nios2/helper.h @@ -21,6 +21,7 @@ DEF_HELPER_FLAGS_2(raise_exception, TCG_CALL_NO_WG, noreturn, env, i32) =20 #if !defined(CONFIG_USER_ONLY) +DEF_HELPER_3(eret, noreturn, env, i32, i32) DEF_HELPER_2(mmu_write_tlbacc, void, env, i32) DEF_HELPER_2(mmu_write_tlbmisc, void, env, i32) DEF_HELPER_2(mmu_write_pteaddr, void, env, i32) diff --git a/target/nios2/op_helper.c b/target/nios2/op_helper.c index caa885f7b4..ee5ad8b23f 100644 --- a/target/nios2/op_helper.c +++ b/target/nios2/op_helper.c @@ -30,3 +30,12 @@ void helper_raise_exception(CPUNios2State *env, uint32_t= index) cs->exception_index =3D index; cpu_loop_exit(cs); } + +#ifndef CONFIG_USER_ONLY +void helper_eret(CPUNios2State *env, uint32_t new_status, uint32_t new_pc) +{ + env->regs[CR_STATUS] =3D new_status; + env->pc =3D new_pc; + cpu_loop_exit(env_cpu(env)); +} +#endif /* !CONFIG_USER_ONLY */ diff --git a/target/nios2/translate.c b/target/nios2/translate.c index 154ffacbea..7c2c430e99 100644 --- a/target/nios2/translate.c +++ b/target/nios2/translate.c @@ -391,10 +391,12 @@ static void eret(DisasContext *dc, uint32_t code, uin= t32_t flags) return; } =20 - tcg_gen_mov_tl(cpu_R[CR_STATUS], cpu_R[CR_ESTATUS]); - tcg_gen_mov_tl(cpu_pc, cpu_R[R_EA]); - - dc->base.is_jmp =3D DISAS_JUMP; +#ifdef CONFIG_USER_ONLY + g_assert_not_reached(); +#else + gen_helper_eret(cpu_env, cpu_R[CR_ESTATUS], cpu_R[R_EA]); + dc->base.is_jmp =3D DISAS_NORETURN; +#endif } =20 /* PC <- ra */ --=20 2.25.1