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[147.11.176.192]) by smtp.gmail.com with ESMTPSA id q12sm6645790pfk.65.2021.10.29.08.25.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Oct 2021 08:25:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=j/0Bz9sC5LlRF86e2Ueb8TDuis/APgGgbCBEo842NeI=; b=SVw2Gozy3IYk+jU14Nae53QsqV2iPuDEK4GV/5y/dGOWASbU5wNHNlCnfjR8mDFjli gP/d9fayszTSf6LmruucKNoV3AvFvzbyENycZMrSf0onHQKo9/yagc9hcvNB7j47IXSc 1eSsjXRKW4n5G6EoZ7vzftSIIP+ckp9ztQyYKX4fNemppP1j5+TPCEpWj3vAcv7sXlKo y0gp/oMnlbYpIJ2+BUPQInNrkO/6XTW/+MG1WuLSB/p+/DNoSkwh0AVUkgDpuVQlr3XZ QlNewdf7jUC1cY10+pnEWXUVT93uidOUSYo3JhFx6chtCpSBM/BEtuaphmTOj8nGGhnn Uwfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=j/0Bz9sC5LlRF86e2Ueb8TDuis/APgGgbCBEo842NeI=; b=B2T8DWoNrS6lnYU0Km/EXT2+yRPzerz5ABVr+qW6yXu8vWfolw9CXc9DOxfvYsuOBd zfVCvqFFCvMVnkA15hOPCeam8dJ6DJBpZA/lNNzYOrH7zLDqhFFA/X/7FKLtgQBPRGku iiyC690VSzwPJRg5uqGNuQR36d9aiizx4xeQqPgt1A+wvQbNrr324OcHT5m5fEnDjC8/ +F/oUpKSE0xWcRvRw/vK0LQxA3oUG1/vWEXKHVRjoUp06bP9lxXQXee5eKfM2GMh7B3H /YnYxxHyx06+N8l9ZTblWG8ryOxFzXpIhEX0THKmV6SHW43iZqPG4JHZVunawO8dfDd5 deIw== X-Gm-Message-State: AOAM533W5E3Pt6gwVu1V9cjIhQCLsGpfD96dW2GCMVE78hauE9k1IqV5 Gs3HbqOhcU/pz7mO99Rocp1O1gDsYWU= X-Google-Smtp-Source: ABdhPJwy/rNNFqzk5fYGc5cZtjB+Dggi2xhxts073uW38CHyQzCnZ/Rj35Uww6YC2lDbXa9swFRNJw== X-Received: by 2002:a17:902:654b:b0:13d:c967:9cbd with SMTP id d11-20020a170902654b00b0013dc9679cbdmr10394110pln.88.1635521153662; Fri, 29 Oct 2021 08:25:53 -0700 (PDT) From: Bin Meng X-Google-Original-From: Bin Meng To: Alistair Francis , qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH 4/5] target/riscv: csr: Hook debug CSR read/write Date: Fri, 29 Oct 2021 23:25:34 +0800 Message-Id: <20211029152535.2055096-5-bin.meng@windriver.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211029152535.2055096-1-bin.meng@windriver.com> References: <20211029152535.2055096-1-bin.meng@windriver.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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::1031; envelope-from=bmeng.cn@gmail.com; helo=mail-pj1-x1031.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1635521285399000003 Content-Type: text/plain; charset="utf-8" This adds debug CSR read/write support to the RISC-V CSR RW table. Signed-off-by: Bin Meng --- target/riscv/cpu.c | 6 +++++ target/riscv/csr.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 63 insertions(+) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 3a2fa97098..45b054b294 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -563,6 +563,12 @@ static void riscv_cpu_realize(DeviceState *dev, Error = **errp) =20 riscv_cpu_register_gdb_regs_for_features(cs); =20 +#ifndef CONFIG_USER_ONLY + if (riscv_feature(env, RISCV_FEATURE_DEBUG)) { + riscv_trigger_init(env); + } +#endif + qemu_init_vcpu(cs); cpu_reset(cs); =20 diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 69e4d65fcd..baa55efc91 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -209,6 +209,15 @@ static RISCVException epmp(CPURISCVState *env, int csr= no) =20 return RISCV_EXCP_ILLEGAL_INST; } + +static RISCVException debug(CPURISCVState *env, int csrno) +{ + if (riscv_feature(env, RISCV_FEATURE_DEBUG)) { + return RISCV_EXCP_NONE; + } + + return RISCV_EXCP_ILLEGAL_INST; +} #endif =20 /* User Floating-Point CSRs */ @@ -1425,6 +1434,48 @@ static RISCVException write_pmpaddr(CPURISCVState *e= nv, int csrno, return RISCV_EXCP_NONE; } =20 +static RISCVException read_tselect(CPURISCVState *env, int csrno, + target_ulong *val) +{ + *val =3D tselect_csr_read(env); + return RISCV_EXCP_NONE; +} + +static RISCVException write_tselect(CPURISCVState *env, int csrno, + target_ulong val) +{ + tselect_csr_write(env, val); + return RISCV_EXCP_NONE; +} + +static RISCVException read_tdata(CPURISCVState *env, int csrno, + target_ulong *val) +{ + /* return 0 in tdata1 to end the trigger enumeration */ + if (env->trigger_cur >=3D TRIGGER_NUM && csrno =3D=3D CSR_TDATA1) { + *val =3D 0; + return RISCV_EXCP_NONE; + } + + if (!tdata_available(env, csrno - CSR_TDATA1)) { + return RISCV_EXCP_ILLEGAL_INST; + } + + *val =3D tdata_csr_read(env, csrno - CSR_TDATA1); + return RISCV_EXCP_NONE; +} + +static RISCVException write_tdata(CPURISCVState *env, int csrno, + target_ulong val) +{ + if (!tdata_available(env, csrno - CSR_TDATA1)) { + return RISCV_EXCP_ILLEGAL_INST; + } + + tdata_csr_write(env, csrno - CSR_TDATA1, val); + return RISCV_EXCP_NONE; +} + #endif =20 /* @@ -1659,6 +1710,12 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] =3D { [CSR_PMPADDR14] =3D { "pmpaddr14", pmp, read_pmpaddr, write_pmpaddr }, [CSR_PMPADDR15] =3D { "pmpaddr15", pmp, read_pmpaddr, write_pmpaddr }, =20 + /* Debug CSRs */ + [CSR_TSELECT] =3D { "tselect", debug, read_tselect, write_tselect }, + [CSR_TDATA1] =3D { "tdata1", debug, read_tdata, write_tdata }, + [CSR_TDATA2] =3D { "tdata2", debug, read_tdata, write_tdata }, + [CSR_TDATA3] =3D { "tdata3", debug, read_tdata, write_tdata }, + /* Performance Counters */ [CSR_HPMCOUNTER3] =3D { "hpmcounter3", ctr, read_zero }, [CSR_HPMCOUNTER4] =3D { "hpmcounter4", ctr, read_zero }, --=20 2.25.1