From patchwork Sat Jun 20 02:54:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11615375 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6E0441392 for ; Sat, 20 Jun 2020 03:02:49 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 08DE722EBE for ; Sat, 20 Jun 2020 03:02:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 08DE722EBE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:41656 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jmTmK-00059u-1b for patchwork-qemu-devel@patchwork.kernel.org; Fri, 19 Jun 2020 23:02:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57166) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jmTla-0004g0-4h; Fri, 19 Jun 2020 23:02:03 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:51994) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jmTlX-0008J1-5l; Fri, 19 Jun 2020 23:02:01 -0400 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.07436283|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_system_inform|0.291767-0.000224626-0.708008; FP=0|0|0|0|0|-1|-1|-1; HT=e02c03298; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=9; RT=8; SR=0; TI=SMTPD_---.HpV3Z6g_1592622111; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.HpV3Z6g_1592622111) by smtp.aliyun-inc.com(10.147.42.198); Sat, 20 Jun 2020 11:01:52 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v10 03/61] target/riscv: support vector extension csr Date: Sat, 20 Jun 2020 10:54:42 +0800 Message-Id: <20200620025540.1109-4-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200620025540.1109-1-zhiwei_liu@c-sky.com> References: <20200620025540.1109-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/19 21:09:48 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=0.001 autolearn=_AUTOLEARN 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: , Cc: richard.henderson@linaro.org, wxy194768@alibaba-inc.com, wenmeng_zhang@c-sky.com, Alistair Francis , palmer@dabbelt.com, LIU Zhiwei Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" The v0.7.1 specification does not define vector status within mstatus. A future revision will define the privileged portion of the vector status. Signed-off-by: LIU Zhiwei Reviewed-by: Alistair Francis Reviewed-by: Richard Henderson --- target/riscv/cpu_bits.h | 15 +++++++++ target/riscv/csr.c | 75 ++++++++++++++++++++++++++++++++++++++++- 2 files changed, 89 insertions(+), 1 deletion(-) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 7f64ee1174..8117e8b5a7 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -29,6 +29,14 @@ #define FSR_NXA (FPEXC_NX << FSR_AEXC_SHIFT) #define FSR_AEXC (FSR_NVA | FSR_OFA | FSR_UFA | FSR_DZA | FSR_NXA) +/* Vector Fixed-Point round model */ +#define FSR_VXRM_SHIFT 9 +#define FSR_VXRM (0x3 << FSR_VXRM_SHIFT) + +/* Vector Fixed-Point saturation flag */ +#define FSR_VXSAT_SHIFT 8 +#define FSR_VXSAT (0x1 << FSR_VXSAT_SHIFT) + /* Control and Status Registers */ /* User Trap Setup */ @@ -48,6 +56,13 @@ #define CSR_FRM 0x002 #define CSR_FCSR 0x003 +/* User Vector CSRs */ +#define CSR_VSTART 0x008 +#define CSR_VXSAT 0x009 +#define CSR_VXRM 0x00a +#define CSR_VL 0xc20 +#define CSR_VTYPE 0xc21 + /* User Timers and Counters */ #define CSR_CYCLE 0xc00 #define CSR_TIME 0xc01 diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 383be0a955..ac01c835e1 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -46,6 +46,10 @@ void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops) static int fs(CPURISCVState *env, int csrno) { #if !defined(CONFIG_USER_ONLY) + /* loose check condition for fcsr in vector extension */ + if ((csrno == CSR_FCSR) && (env->misa & RVV)) { + return 0; + } if (!env->debugger && !riscv_cpu_fp_enabled(env)) { return -1; } @@ -53,6 +57,14 @@ static int fs(CPURISCVState *env, int csrno) return 0; } +static int vs(CPURISCVState *env, int csrno) +{ + if (env->misa & RVV) { + return 0; + } + return -1; +} + static int ctr(CPURISCVState *env, int csrno) { #if !defined(CONFIG_USER_ONLY) @@ -154,6 +166,10 @@ static int read_fcsr(CPURISCVState *env, int csrno, target_ulong *val) #endif *val = (riscv_cpu_get_fflags(env) << FSR_AEXC_SHIFT) | (env->frm << FSR_RD_SHIFT); + if (vs(env, csrno) >= 0) { + *val |= (env->vxrm << FSR_VXRM_SHIFT) + | (env->vxsat << FSR_VXSAT_SHIFT); + } return 0; } @@ -166,10 +182,62 @@ static int write_fcsr(CPURISCVState *env, int csrno, target_ulong val) env->mstatus |= MSTATUS_FS; #endif env->frm = (val & FSR_RD) >> FSR_RD_SHIFT; + if (vs(env, csrno) >= 0) { + env->vxrm = (val & FSR_VXRM) >> FSR_VXRM_SHIFT; + env->vxsat = (val & FSR_VXSAT) >> FSR_VXSAT_SHIFT; + } riscv_cpu_set_fflags(env, (val & FSR_AEXC) >> FSR_AEXC_SHIFT); return 0; } +static int read_vtype(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val = env->vtype; + return 0; +} + +static int read_vl(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val = env->vl; + return 0; +} + +static int read_vxrm(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val = env->vxrm; + return 0; +} + +static int write_vxrm(CPURISCVState *env, int csrno, target_ulong val) +{ + env->vxrm = val; + return 0; +} + +static int read_vxsat(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val = env->vxsat; + return 0; +} + +static int write_vxsat(CPURISCVState *env, int csrno, target_ulong val) +{ + env->vxsat = val; + return 0; +} + +static int read_vstart(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val = env->vstart; + return 0; +} + +static int write_vstart(CPURISCVState *env, int csrno, target_ulong val) +{ + env->vstart = val; + return 0; +} + /* User Timers and Counters */ static int read_instret(CPURISCVState *env, int csrno, target_ulong *val) { @@ -1183,7 +1251,12 @@ static riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = { [CSR_FFLAGS] = { fs, read_fflags, write_fflags }, [CSR_FRM] = { fs, read_frm, write_frm }, [CSR_FCSR] = { fs, read_fcsr, write_fcsr }, - + /* Vector CSRs */ + [CSR_VSTART] = { vs, read_vstart, write_vstart }, + [CSR_VXSAT] = { vs, read_vxsat, write_vxsat }, + [CSR_VXRM] = { vs, read_vxrm, write_vxrm }, + [CSR_VL] = { vs, read_vl }, + [CSR_VTYPE] = { vs, read_vtype }, /* User Timers and Counters */ [CSR_CYCLE] = { ctr, read_instret }, [CSR_INSTRET] = { ctr, read_instret },