From patchwork Mon Jun 28 12:04:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: gaosong X-Patchwork-Id: 12347867 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66B4AC2B9F4 for ; Mon, 28 Jun 2021 12:31:48 +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 1812C6197F for ; Mon, 28 Jun 2021 12:31:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1812C6197F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37730 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lxqQU-0005qo-Th for qemu-devel@archiver.kernel.org; Mon, 28 Jun 2021 08:31:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52490) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lxq6f-0004cQ-LV for qemu-devel@nongnu.org; Mon, 28 Jun 2021 08:11:17 -0400 Received: from mail.loongson.cn ([114.242.206.163]:47008 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lxq6d-00045Y-2x for qemu-devel@nongnu.org; Mon, 28 Jun 2021 08:11:17 -0400 Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9DxL0LdutlgOrYZAA--.8747S7; Mon, 28 Jun 2021 20:04:47 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Subject: [PATCH 05/20] target/loongarch: Add memory management support Date: Mon, 28 Jun 2021 20:04:30 +0800 Message-Id: <1624881885-31692-6-git-send-email-gaosong@loongson.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1624881885-31692-1-git-send-email-gaosong@loongson.cn> References: <1624881885-31692-1-git-send-email-gaosong@loongson.cn> X-CM-TRANSID: AQAAf9DxL0LdutlgOrYZAA--.8747S7 X-Coremail-Antispam: 1UD129KBjvJXoWxWFWkKryrWw4rtrW7Gr17Wrg_yoWrArW5pr 9rCryUGF48X39xZ3yfXa4FqF15ua1xGryIva1ft34Sk34aqr1jvr4vg3srXF15Cw4UJw4I v3WrZw1jgF1UZaDanT9S1TB71UUUUjDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ Received-SPF: pass client-ip=114.242.206.163; envelope-from=gaosong@loongson.cn; helo=loongson.cn 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_PASS=-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: , Cc: peter.maydell@linaro.org, thuth@redhat.com, richard.henderson@linaro.org, laurent@vivier.eu, maobibo@loongson.cn, alistair.francis@wdc.com, pbonzini@redhat.com, philmd@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This patch introduces one memory-management-related functions - loongarch_cpu_tlb_fill() Signed-off-by: Song Gao --- target/loongarch/cpu.c | 1 + target/loongarch/internal.h | 9 ++++ target/loongarch/tlb_helper.c | 109 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 target/loongarch/tlb_helper.c diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index c3ecc4b..a39a3bd 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -379,6 +379,7 @@ static struct TCGCPUOps loongarch_tcg_ops = { .initialize = loongarch_tcg_init, .synchronize_from_tb = loongarch_cpu_synchronize_from_tb, .cpu_exec_interrupt = loongarch_cpu_exec_interrupt, + .tlb_fill = loongarch_cpu_tlb_fill, }; #endif /* CONFIG_TCG */ diff --git a/target/loongarch/internal.h b/target/loongarch/internal.h index 09e667c..40454ee 100644 --- a/target/loongarch/internal.h +++ b/target/loongarch/internal.h @@ -95,4 +95,13 @@ static inline void compute_hflags(CPULoongArchState *env) const char *loongarch_exception_name(int32_t exception); +/* tlb_helper.c */ +bool loongarch_cpu_tlb_fill(CPUState *cs, + vaddr address, + int size, + MMUAccessType access_type, + int mmu_idx, + bool probe, + uintptr_t retaddr); + #endif diff --git a/target/loongarch/tlb_helper.c b/target/loongarch/tlb_helper.c new file mode 100644 index 0000000..3889109 --- /dev/null +++ b/target/loongarch/tlb_helper.c @@ -0,0 +1,109 @@ +/* + * LoongArch tlb emulation helpers for qemu. + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#include "qemu/osdep.h" +#include "cpu.h" +#include "internal.h" +#include "cpu-csr.h" +#include "exec/helper-proto.h" +#include "exec/exec-all.h" +#include "exec/cpu_ldst.h" +#include "exec/log.h" + +enum { + TLBRET_PE = -7, + TLBRET_XI = -6, + TLBRET_RI = -5, + TLBRET_DIRTY = -4, + TLBRET_INVALID = -3, + TLBRET_NOMATCH = -2, + TLBRET_BADADDR = -1, + TLBRET_MATCH = 0 +}; + +static void raise_mmu_exception(CPULoongArchState *env, target_ulong address, + MMUAccessType access_type, int tlb_error) +{ + CPUState *cs = env_cpu(env); + int exception = 0, error_code = 0; + + if (access_type == MMU_INST_FETCH) { + error_code |= INST_INAVAIL; + } + + switch (tlb_error) { + default: + case TLBRET_BADADDR: + exception = EXCP_ADE; + break; + case TLBRET_NOMATCH: + /* No TLB match for a mapped address */ + if (access_type == MMU_DATA_STORE) { + exception = EXCP_TLBS; + } else { + exception = EXCP_TLBL; + } + error_code |= TLB_NOMATCH; + break; + case TLBRET_INVALID: + /* TLB match with no valid bit */ + if (access_type == MMU_DATA_STORE) { + exception = EXCP_TLBS; + } else { + exception = EXCP_TLBL; + } + break; + case TLBRET_DIRTY: + exception = EXCP_TLBM; + break; + case TLBRET_XI: + /* Execute-Inhibit Exception */ + exception = EXCP_TLBXI; + break; + case TLBRET_RI: + /* Read-Inhibit Exception */ + exception = EXCP_TLBRI; + break; + case TLBRET_PE: + /* Privileged Exception */ + exception = EXCP_TLBPE; + break; + } + + if (env->insn_flags & INSN_LOONGARCH) { + if (tlb_error == TLBRET_NOMATCH) { + env->CSR_TLBRBADV = address; + env->CSR_TLBREHI = address & (TARGET_PAGE_MASK << 1); + cs->exception_index = exception; + env->error_code = error_code; + return; + } + } + + /* Raise exception */ + env->CSR_BADV = address; + cs->exception_index = exception; + env->error_code = error_code; + + if (env->insn_flags & INSN_LOONGARCH) { + env->CSR_TLBEHI = address & (TARGET_PAGE_MASK << 1); + } +} + +bool loongarch_cpu_tlb_fill(CPUState *cs, vaddr address, int size, + MMUAccessType access_type, int mmu_idx, + bool probe, uintptr_t retaddr) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + int ret = TLBRET_BADADDR; + + /* data access */ + raise_mmu_exception(env, address, access_type, ret); + do_raise_exception_err(env, cs->exception_index, env->error_code, retaddr); +}