From patchwork Mon Jun 28 12:04:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: gaosong X-Patchwork-Id: 12347797 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 46BA0C2B9F4 for ; Mon, 28 Jun 2021 12:10:17 +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 DB58561C49 for ; Mon, 28 Jun 2021 12:10:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB58561C49 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]:40828 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lxq5d-0002Jb-He for qemu-devel@archiver.kernel.org; Mon, 28 Jun 2021 08:10:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51148) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lxq0Z-0002AG-Sp for qemu-devel@nongnu.org; Mon, 28 Jun 2021 08:04:59 -0400 Received: from mail.loongson.cn ([114.242.206.163]:45326 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lxq0T-00015F-Lm for qemu-devel@nongnu.org; Mon, 28 Jun 2021 08:04:59 -0400 Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9DxL0LdutlgOrYZAA--.8747S5; Mon, 28 Jun 2021 20:04:46 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Subject: [PATCH 03/20] target/loongarch: Add core definition Date: Mon, 28 Jun 2021 20:04:28 +0800 Message-Id: <1624881885-31692-4-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--.8747S5 X-Coremail-Antispam: 1UD129KBjvAXoWfWF1DWF1DJw18uFWrAw4Dtwb_yoW5GF4fZo W8AFWfXa18Jr1Ska9a93sIg3y2qry8CF4DAa40vrWxWa18tay5GrykK34avFy7Xr95XrW7 CasFg3ZrJay7Crn3n29KB7ZKAUJUUUU3529EdanIXcx71UUUUU7v73VFW2AGmfu7bjvjm3 AaLaJ3UjIYCTnIWjDUYxBIdaVFxhVjvjDU0xZFpf9x0zRUUUUUUUUU= 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 add target state header,target definitions and initialization routines. Signed-off-by: Song Gao --- target/loongarch/cpu-param.h | 21 ++ target/loongarch/cpu-qom.h | 41 ++++ target/loongarch/cpu.c | 451 +++++++++++++++++++++++++++++++++++++++++++ target/loongarch/cpu.h | 245 +++++++++++++++++++++++ target/loongarch/internal.h | 74 +++++++ 5 files changed, 832 insertions(+) create mode 100644 target/loongarch/cpu-param.h create mode 100644 target/loongarch/cpu-qom.h create mode 100644 target/loongarch/cpu.c create mode 100644 target/loongarch/cpu.h create mode 100644 target/loongarch/internal.h diff --git a/target/loongarch/cpu-param.h b/target/loongarch/cpu-param.h new file mode 100644 index 0000000..582ee29 --- /dev/null +++ b/target/loongarch/cpu-param.h @@ -0,0 +1,21 @@ +/* + * LoongArch cpu parameters for qemu. + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef LOONGARCH_CPU_PARAM_H +#define LOONGARCH_CPU_PARAM_H 1 + +#ifdef TARGET_LOONGARCH64 +#define TARGET_LONG_BITS 64 +#define TARGET_PHYS_ADDR_SPACE_BITS 48 +#define TARGET_VIRT_ADDR_SPACE_BITS 48 +#endif + +#define TARGET_PAGE_BITS 12 +#define NB_MMU_MODES 4 + +#endif diff --git a/target/loongarch/cpu-qom.h b/target/loongarch/cpu-qom.h new file mode 100644 index 0000000..ce14d13 --- /dev/null +++ b/target/loongarch/cpu-qom.h @@ -0,0 +1,41 @@ +/* + * QEMU LoongArch CPU + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef QEMU_LOONGARCH_CPU_QOM_H +#define QEMU_LOONGARCH_CPU_QOM_H + +#include "hw/core/cpu.h" +#include "qom/object.h" + +#ifdef TARGET_LOONGARCH64 +#define TYPE_LOONGARCH_CPU "loongarch64-cpu" +#else +#error LoongArch 32bit emulation is not implemented yet +#endif + +OBJECT_DECLARE_TYPE(LoongArchCPU, LoongArchCPUClass, + LOONGARCH_CPU) + +/** + * LoongArchCPUClass: + * @parent_realize: The parent class' realize handler. + * @parent_reset: The parent class' reset handler. + * + * A LoongArch CPU model. + */ +struct LoongArchCPUClass { + /*< private >*/ + CPUClass parent_class; + /*< public >*/ + + DeviceRealize parent_realize; + DeviceReset parent_reset; + const struct loongarch_def_t *cpu_def; +}; + +#endif diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c new file mode 100644 index 0000000..b368e79 --- /dev/null +++ b/target/loongarch/cpu.c @@ -0,0 +1,451 @@ +/* + * QEMU LoongArch CPU + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#include "qemu/osdep.h" +#include "qemu/qemu-print.h" +#include "qapi/error.h" +#include "qemu/module.h" +#include "sysemu/qtest.h" +#include "exec/exec-all.h" +#include "hw/qdev-properties.h" +#include "hw/qdev-clock.h" +#include "qapi/qapi-commands-machine-target.h" +#include "cpu.h" +#include "cpu-csr.h" +#include "cpu-qom.h" +#include "internal.h" + +static const char * const excp_names[EXCP_LAST + 1] = { + [EXCP_INTE] = "Interrupt error", + [EXCP_ADE] = "Address error", + [EXCP_SYSCALL] = "Syscall", + [EXCP_BREAK] = "Break", + [EXCP_FPDIS] = "FPU Disabled", + [EXCP_INE] = "Inst. Not Exist", + [EXCP_TRAP] = "Trap", + [EXCP_FPE] = "Floating Point Exception", + [EXCP_TLBM] = "TLB modified fault", + [EXCP_TLBL] = "TLB miss on a load", + [EXCP_TLBS] = "TLB miss on a store", + [EXCP_TLBPE] = "TLB Privilege Error", + [EXCP_TLBXI] = "TLB Execution-Inhibit exception", + [EXCP_TLBRI] = "TLB Read-Inhibit exception", +}; + +const char *loongarch_exception_name(int32_t exception) +{ + if (exception < 0 || exception > EXCP_LAST) { + return "unknown"; + } + return excp_names[exception]; +} + +target_ulong exception_resume_pc(CPULoongArchState *env) +{ + target_ulong bad_pc; + + bad_pc = env->active_tc.PC; + + return bad_pc; +} + +void QEMU_NORETURN do_raise_exception_err(CPULoongArchState *env, + uint32_t exception, + int error_code, + uintptr_t pc) +{ + CPUState *cs = env_cpu(env); + + qemu_log_mask(CPU_LOG_INT, "%s: %d (%s) %d\n", + __func__, + exception, + loongarch_exception_name(exception), + error_code); + cs->exception_index = exception; + env->error_code = error_code; + + cpu_loop_exit_restore(cs, pc); +} + +static void loongarch_cpu_set_pc(CPUState *cs, vaddr value) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + + env->active_tc.PC = value & ~(target_ulong)1; +} + +#ifdef CONFIG_TCG +static void loongarch_cpu_synchronize_from_tb(CPUState *cs, + const TranslationBlock *tb) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + + env->active_tc.PC = tb->pc; + env->hflags &= ~LOONGARCH_HFLAG_BMASK; + env->hflags |= tb->flags & LOONGARCH_HFLAG_BMASK; +} +#endif /* CONFIG_TCG */ + +static bool loongarch_cpu_has_work(CPUState *cs) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + bool has_work = false; + + if ((cs->interrupt_request & CPU_INTERRUPT_HARD) && + cpu_loongarch_hw_interrupts_pending(env)) { + has_work = true; + } + + return has_work; +} + +#define LOONGARCH_CONFIG1 \ +((0x8 << CSR_CONF1_KSNUM_SHIFT) | (0x2f << CSR_CONF1_TMRBITS_SHIFT) | \ + (0x7 << CSR_CONF1_VSMAX_SHIFT)) + +#define LOONGARCH_CONFIG3 \ +((0x2 << CSR_CONF3_TLBORG_SHIFT) | (0x3f << CSR_CONF3_MTLBSIZE_SHIFT) | \ + (0x7 << CSR_CONF3_STLBWAYS_SHIFT) | (0x8 << CSR_CONF3_STLBIDX_SHIFT)) + +#define LOONGARCH_MCSR0 \ +((0x0UL << MCSR0_GR32_SHIFT) | (0x1UL << MCSR0_GR64_SHIFT) | \ + (0x1UL << MCSR0_PAGING_SHIFT) | (0x1UL << MCSR0_IOCSR_SHIFT) | \ + (0x2fUL << MCSR0_PABIT_SHIFT) | (0x2fUL << MCSR0_VABIT_SHIFT) | \ + (0x1UL << MCSR0_UAL_SHIFT) | (0x1UL << MCSR0_RI_SHIFT) | \ + (0x1UL << MCSR0_EXEPROT_SHIFT) | (0x1UL << MCSR0_RPLVTLB_SHIFT) | \ + (0x1UL << MCSR0_HUGEPG_SHIFT) | (0x1UL << MCSR0_IOCSR_BRD_SHIFT) | \ + (0x0UL << MCSR0_INT_IMPL_SHIFT) | MCSR0_PRID) + +#define LOONGARCH_MCSR1 \ +((0x1UL << MCSR1_FP_SHIFT) | (0x1UL << MCSR1_FPSP_SHIFT) | \ + (0x1UL << MCSR1_FPDP_SHIFT) | (0x1UL << MCSR1_FPVERS_SHIFT) | \ + (0x1UL << MCSR1_LSX_SHIFT) | (0x1UL << MCSR1_LASX_SHIFT) | \ + (0x1UL << MCSR1_COMPLEX_SHIFT) | (0x1UL << MCSR1_CRYPTO_SHIFT) | \ + (0x0UL << MCSR1_VZ_SHIFT) | (0x0UL << MCSR1_VZVERS_SHIFT) | \ + (0x1UL << MCSR1_LLFTP_SHIFT) | (0x1UL << MCSR1_LLFTPVERS_SHIFT) | \ + (0x0UL << MCSR1_X86BT_SHIFT) | (0x0UL << MCSR1_ARMBT_SHIFT) | \ + (0x0UL << MCSR1_LOONGARCHBT_SHIFT) | (0x1UL << MCSR1_LSPW_SHIFT) | \ + (0x1UL << MCSR1_LAMO_SHIFT) | (0x1UL << MCSR1_CCDMA_SHIFT) | \ + (0x1UL << MCSR1_SFB_SHIFT) | (0x1UL << MCSR1_UCACC_SHIFT) | \ + (0x1UL << MCSR1_LLEXC_SHIFT) | (0x1UL << MCSR1_SCDLY_SHIFT) | \ + (0x1UL << MCSR1_LLDBAR_SHIFT) | (0x1UL << MCSR1_ITLBT_SHIFT) | \ + (0x1UL << MCSR1_ICACHET_SHIFT) | (0x4UL << MCSR1_SPW_LVL_SHIFT) | \ + (0x1UL << MCSR1_HPFOLD_SHIFT)) + +#define LOONGARCH_MCSR2 \ +((0x1UL << MCSR2_CCMUL_SHIFT) | (0x1UL << MCSR2_CCDIV_SHIFT) | CCFREQ_DEFAULT) + +#define LOONGARCH_MCSR3 \ +((0x1UL << MCSR3_PMP_SHIFT) | (0x1UL << MCSR3_PAMVER_SHIFT) | \ + (0x3UL << MCSR3_PMNUM_SHIFT) | (0x3fUL < MCSR3_PMBITS_SHIFT) | \ + (0x1UL << MCSR3_UPM_SHIFT)) + + +#define LOONGARCH_MCSR8 \ +((0x1UL << MCSR8_L1IUPRE_SHIFT) | (0x0 << MCSR8_L1IUUNIFY_SHIFT) | \ + (0x1UL << MCSR8_L1DPRE_SHIFT) | (0x1UL << MCSR8_L2IUPRE_SHIFT) | \ + (0x1UL << MCSR8_L2IUUNIFY_SHIFT) | (0x1UL << MCSR8_L2IUPRIV_SHIFT) | \ + (0x0 << MCSR8_L2IUINCL_SHIFT) | (0x0 << MCSR8_L2DPRE_SHIFT) | \ + (0x0 << MCSR8_L2DPRIV_SHIFT) | (0x0 << MCSR8_L2DINCL_SHIFT) | \ + (0x1UL << MCSR8_L3IUPRE_SHIFT) | (0x1UL << MCSR8_L3IUUNIFY_SHIFT) | \ + (0x0 << MCSR8_L3IUPRIV_SHIFT) | (0x1UL << MCSR8_L3IUINCL_SHIFT) | \ + (0x0 << MCSR8_L3DPRE_SHIFT) | (0x0 < MCSR8_L3DPRIV_SHIFT) | \ + (0x0 << MCSR8_L3DINCL_SHIFT) | (0x3UL << MCSR8_L1I_WAY_SHIFT) | \ + (0x8UL << MCSR8_L1I_IDX_SHIFT) | (0x6UL << MCSR8_L1I_SIZE_SHIFT)) + +#define LOONGARCH_MCSR9 \ +((0x3UL << MCSR9_L1D_WAY_SHIFT) | (0x8UL << MCSR9_L1D_IDX_SHIFT) | \ + (0x6UL << MCSR9_L1D_SIZE_SHIFT) | (0xfUL << MCSR9_L2U_WAY_SHIFT) | \ + (0x8UL << MCSR9_L2U_IDX_SHIFT) | (0x6UL << MCSR9_L2U_SIZE_SHIFT)) + +#define LOONGARCH_MCSR10 \ +((0xfUL << MCSR10_L3U_WAY_SHIFT) | (0xfUL << MCSR10_L3U_IDX_SHIFT) | \ + (0x6UL << MCSR10_L3U_SIZE_SHIFT)) + +#define LOONGARCH_MCSR24 \ +((0x0 << MCSR24_MCSRLOCK_SHIFT) | (0x0 << MCSR24_NAPEN_SHIFT) | \ + (0x0 << MCSR24_VFPUCG_SHIFT) | (0x0 << MCSR24_RAMCG_SHIFT)) + +/* LoongArch CPU definitions */ +const loongarch_def_t loongarch_defs[] = { + { + .name = "Loongson-3A5000", + + /* for LoongArch CSR */ + .CSR_PRCFG1 = LOONGARCH_CONFIG1, + .CSR_PRCFG2 = 0x3ffff000, + .CSR_PRCFG3 = LOONGARCH_CONFIG3, + .CSR_CRMD = (0 << CSR_CRMD_PLV_SHIFT) | (0 << CSR_CRMD_IE_SHIFT) | + (1 << CSR_CRMD_DA_SHIFT) | (0 << CSR_CRMD_PG_SHIFT) | + (1 << CSR_CRMD_DACF_SHIFT) | (1 << CSR_CRMD_DACM_SHIFT), + .CSR_ECFG = 0x7 << 16, + .CSR_STLBPGSIZE = 0xe, + .CSR_RVACFG = 0x0, + .CSR_MCSR0 = LOONGARCH_MCSR0, + .CSR_MCSR1 = LOONGARCH_MCSR1, + .CSR_MCSR2 = LOONGARCH_MCSR2, + .CSR_MCSR3 = 0, + .CSR_MCSR8 = LOONGARCH_MCSR8, + .CSR_MCSR9 = LOONGARCH_MCSR9, + .CSR_MCSR10 = LOONGARCH_MCSR10, + .CSR_MCSR24 = LOONGARCH_MCSR24, + .FCSR0 = 0x0, + .FCSR0_MASK = 0x1f1f03df, + .PABITS = 48, + .INSN_FLAGS = CPU_LA64 | INSN_LOONGARCH, + .MMU_TYPE = MMU_TYPE_LS3A5K, + }, + { + .name = "host", + + /* for LoongArch CSR */ + .CSR_PRCFG1 = LOONGARCH_CONFIG1, + .CSR_PRCFG2 = 0x3ffff000, + .CSR_PRCFG3 = LOONGARCH_CONFIG3, + .CSR_CRMD = (0 << CSR_CRMD_PLV_SHIFT) | (0 << CSR_CRMD_IE_SHIFT) | + (1 << CSR_CRMD_DA_SHIFT) | (0 << CSR_CRMD_PG_SHIFT) | + (1 << CSR_CRMD_DACF_SHIFT) | (1 << CSR_CRMD_DACM_SHIFT), + .CSR_ECFG = 0x7 << 16, + .CSR_STLBPGSIZE = 0xe, + .CSR_RVACFG = 0x0, + .CSR_MCSR0 = LOONGARCH_MCSR0, + .CSR_MCSR1 = LOONGARCH_MCSR1, + .CSR_MCSR2 = LOONGARCH_MCSR2, + .CSR_MCSR3 = 0, + .CSR_MCSR8 = LOONGARCH_MCSR8, + .CSR_MCSR9 = LOONGARCH_MCSR9, + .CSR_MCSR10 = LOONGARCH_MCSR10, + .CSR_MCSR24 = LOONGARCH_MCSR24, + .FCSR0 = 0x0, + .FCSR0_MASK = 0x1f1f03df, + .PABITS = 48, + .INSN_FLAGS = CPU_LA64 | INSN_LOONGARCH, + .MMU_TYPE = MMU_TYPE_LS3A5K, + }, +}; + +const int loongarch_defs_number = ARRAY_SIZE(loongarch_defs); + +void loongarch_cpu_list(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(loongarch_defs); i++) { + qemu_printf("LoongArch '%s'\n", loongarch_defs[i].name); + } +} + +static void fpu_init(CPULoongArchState *env, const loongarch_def_t *def) +{ + memcpy(&env->active_fpu, &env->fpus[0], sizeof(env->active_fpu)); +} + +static void loongarch_cpu_reset(DeviceState *dev) +{ + CPUState *cs = CPU(dev); + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + LoongArchCPUClass *mcc = LOONGARCH_CPU_GET_CLASS(cpu); + CPULoongArchState *env = &cpu->env; + + mcc->parent_reset(dev); + + memset(env, 0, offsetof(CPULoongArchState, end_reset_fields)); + + /* Reset registers to their default values */ + env->CSR_PRCFG1 = env->cpu_model->CSR_PRCFG1; + env->CSR_PRCFG2 = env->cpu_model->CSR_PRCFG2; + env->CSR_PRCFG3 = env->cpu_model->CSR_PRCFG3; + env->CSR_CRMD = env->cpu_model->CSR_CRMD; + env->CSR_ECFG = env->cpu_model->CSR_ECFG; + env->CSR_STLBPGSIZE = env->cpu_model->CSR_STLBPGSIZE; + env->CSR_RVACFG = env->cpu_model->CSR_RVACFG; + env->CSR_MCSR0 = env->cpu_model->CSR_MCSR0; + env->CSR_MCSR1 = env->cpu_model->CSR_MCSR1; + env->CSR_MCSR2 = env->cpu_model->CSR_MCSR2; + env->CSR_MCSR3 = env->cpu_model->CSR_MCSR3; + env->CSR_MCSR8 = env->cpu_model->CSR_MCSR8; + env->CSR_MCSR9 = env->cpu_model->CSR_MCSR9; + env->CSR_MCSR10 = env->cpu_model->CSR_MCSR10; + env->CSR_MCSR24 = env->cpu_model->CSR_MCSR24; + + env->current_tc = 0; + env->PABITS = env->cpu_model->PABITS; + env->active_fpu.fcsr0_mask = env->cpu_model->FCSR0_MASK; + env->active_fpu.fcsr0 = env->cpu_model->FCSR0; + env->insn_flags = env->cpu_model->INSN_FLAGS; + + compute_hflags(env); + restore_pamask(env); + cs->exception_index = EXCP_NONE; +} + +static void loongarch_cpu_disas_set_info(CPUState *s, disassemble_info *info) +{ + info->print_insn = print_insn_loongarch; +} + +static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp) +{ + CPUState *cs = CPU(dev); + LoongArchCPU *cpu = LOONGARCH_CPU(dev); + CPULoongArchState *env = &cpu->env; + LoongArchCPUClass *mcc = LOONGARCH_CPU_GET_CLASS(dev); + Error *local_err = NULL; + + cpu_exec_realizefn(cs, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return; + } + + env->exception_base = 0x1C000000; + + fpu_init(env, env->cpu_model); + + cpu_reset(cs); + qemu_init_vcpu(cs); + + mcc->parent_realize(dev, errp); +} + +static void loongarch_cpu_initfn(Object *obj) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(obj); + CPULoongArchState *env = &cpu->env; + LoongArchCPUClass *mcc = LOONGARCH_CPU_GET_CLASS(obj); + + cpu_set_cpustate_pointers(cpu); + cpu->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, cpu, 0); + env->cpu_model = mcc->cpu_def; +} + +static char *loongarch_cpu_type_name(const char *cpu_model) +{ + return g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model); +} + +static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model) +{ + ObjectClass *oc; + char *typename; + + typename = loongarch_cpu_type_name(cpu_model); + oc = object_class_by_name(typename); + g_free(typename); + return oc; +} + +static Property loongarch_cpu_properties[] = { + DEFINE_PROP_INT32("core-id", LoongArchCPU, core_id, -1), + DEFINE_PROP_UINT32("id", LoongArchCPU, id, UNASSIGNED_CPU_ID), + DEFINE_PROP_INT32("node-id", LoongArchCPU, node_id, CPU_UNSET_NUMA_NODE_ID), + DEFINE_PROP_END_OF_LIST() +}; + +#ifdef CONFIG_TCG +#include "hw/core/tcg-cpu-ops.h" + +static struct TCGCPUOps loongarch_tcg_ops = { + .initialize = loongarch_tcg_init, + .synchronize_from_tb = loongarch_cpu_synchronize_from_tb, +}; +#endif /* CONFIG_TCG */ + +static void loongarch_cpu_class_init(ObjectClass *c, void *data) +{ + LoongArchCPUClass *mcc = LOONGARCH_CPU_CLASS(c); + CPUClass *cc = CPU_CLASS(c); + DeviceClass *dc = DEVICE_CLASS(c); + + device_class_set_parent_realize(dc, loongarch_cpu_realizefn, + &mcc->parent_realize); + device_class_set_parent_reset(dc, loongarch_cpu_reset, &mcc->parent_reset); + device_class_set_props(dc, loongarch_cpu_properties); + + cc->class_by_name = loongarch_cpu_class_by_name; + cc->has_work = loongarch_cpu_has_work; + cc->dump_state = loongarch_cpu_dump_state; + cc->set_pc = loongarch_cpu_set_pc; + cc->disas_set_info = loongarch_cpu_disas_set_info; +#ifdef CONFIG_TCG + cc->tcg_ops = &loongarch_tcg_ops; +#endif +} + +static const TypeInfo loongarch_cpu_type_info = { + .name = TYPE_LOONGARCH_CPU, + .parent = TYPE_CPU, + .instance_size = sizeof(LoongArchCPU), + .instance_init = loongarch_cpu_initfn, + .abstract = true, + .class_size = sizeof(LoongArchCPUClass), + .class_init = loongarch_cpu_class_init, +}; + +static void loongarch_cpu_cpudef_class_init(ObjectClass *oc, void *data) +{ + LoongArchCPUClass *mcc = LOONGARCH_CPU_CLASS(oc); + mcc->cpu_def = data; +} + +static void loongarch_register_cpudef_type(const struct loongarch_def_t *def) +{ + char *typename = loongarch_cpu_type_name(def->name); + TypeInfo ti = { + .name = typename, + .parent = TYPE_LOONGARCH_CPU, + .class_init = loongarch_cpu_cpudef_class_init, + .class_data = (void *)def, + }; + + type_register(&ti); + g_free(typename); +} + +static void loongarch_cpu_register_types(void) +{ + int i; + + type_register_static(&loongarch_cpu_type_info); + for (i = 0; i < loongarch_defs_number; i++) { + loongarch_register_cpudef_type(&loongarch_defs[i]); + } +} + +type_init(loongarch_cpu_register_types) + +static void loongarch_cpu_add_definition(gpointer data, gpointer user_data) +{ + ObjectClass *oc = data; + CpuDefinitionInfoList **cpu_list = user_data; + CpuDefinitionInfo *info; + const char *typename; + + typename = object_class_get_name(oc); + info = g_malloc0(sizeof(*info)); + info->name = g_strndup(typename, + strlen(typename) - strlen("-" TYPE_LOONGARCH_CPU)); + info->q_typename = g_strdup(typename); + + QAPI_LIST_PREPEND(*cpu_list, info); +} + +CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp) +{ + CpuDefinitionInfoList *cpu_list = NULL; + GSList *list; + + list = object_class_get_list(TYPE_LOONGARCH_CPU, false); + g_slist_foreach(list, loongarch_cpu_add_definition, &cpu_list); + g_slist_free(list); + + return cpu_list; +} diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h new file mode 100644 index 0000000..1352188 --- /dev/null +++ b/target/loongarch/cpu.h @@ -0,0 +1,245 @@ +/* + * QEMU LoongArch CPU + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef LOONGARCH_CPU_H +#define LOONGARCH_CPU_H + +#include "exec/cpu-defs.h" +#include "fpu/softfloat-types.h" +#include "hw/clock.h" +#include "cpu-qom.h" +#include "cpu-csr.h" + +#define ISA_LA32 0x00000001ULL +#define ISA_LA64 0x00000002ULL +#define INSN_LOONGARCH 0x00010000ULL + +#define CPU_LA32 (ISA_LA32) +#define CPU_LA64 (ISA_LA32 | ISA_LA64) + +#define TCG_GUEST_DEFAULT_MO (0) +#define UNASSIGNED_CPU_ID 0xFFFFFFFF + +typedef union fpr_t fpr_t; +union fpr_t { + float64 fd; /* ieee double precision */ + float32 fs[2];/* ieee single precision */ + uint64_t d; /* binary double fixed-point */ + uint32_t w[2]; /* binary single fixed-point */ +}; + +/* + * define FP_ENDIAN_IDX to access the same location + * in the fpr_t union regardless of the host endianness + */ +#if defined(HOST_WORDS_BIGENDIAN) +# define FP_ENDIAN_IDX 1 +#else +# define FP_ENDIAN_IDX 0 +#endif + +typedef struct CPULoongArchFPUContext CPULoongArchFPUContext; +struct CPULoongArchFPUContext { + /* Floating point registers */ + fpr_t fpr[32]; + float_status fp_status; + + bool cf[8]; + /* + * fcsr0 + * 31:29 |28:24 |23:21 |20:16 |15:10 |9:8 |7 |6 |5 |4:0 + * Cause Flags RM DAE TM Enables + */ + uint32_t fcsr0; + uint32_t fcsr0_mask; + uint32_t vcsr16; + +#define FCSR0_M1 0xdf /* FCSR1 mask, DAE, TM and Enables */ +#define FCSR0_M2 0x1f1f0000 /* FCSR2 mask, Cause and Flags */ +#define FCSR0_M3 0x300 /* FCSR3 mask, Round Mode */ +#define FCSR0_RM 8 /* Round Mode bit num on fcsr0 */ +#define GET_FP_CAUSE(reg) (((reg) >> 24) & 0x1f) +#define GET_FP_ENABLE(reg) (((reg) >> 0) & 0x1f) +#define GET_FP_FLAGS(reg) (((reg) >> 16) & 0x1f) +#define SET_FP_CAUSE(reg, v) do { (reg) = ((reg) & ~(0x1f << 24)) | \ + ((v & 0x1f) << 24); \ + } while (0) +#define SET_FP_ENABLE(reg, v) do { (reg) = ((reg) & ~(0x1f << 0)) | \ + ((v & 0x1f) << 0); \ + } while (0) +#define SET_FP_FLAGS(reg, v) do { (reg) = ((reg) & ~(0x1f << 16)) | \ + ((v & 0x1f) << 16); \ + } while (0) +#define UPDATE_FP_FLAGS(reg, v) do { (reg) |= ((v & 0x1f) << 16); } while (0) +#define FP_INEXACT 1 +#define FP_UNDERFLOW 2 +#define FP_OVERFLOW 4 +#define FP_DIV0 8 +#define FP_INVALID 16 +}; + +#define TARGET_INSN_START_EXTRA_WORDS 2 + +typedef struct loongarch_def_t loongarch_def_t; + +#define LOONGARCH_FPU_MAX 1 + +typedef struct TCState TCState; +struct TCState { + target_ulong gpr[32]; + target_ulong PC; +}; + +#define N_IRQS 14 + +typedef struct CPULoongArchState CPULoongArchState; +struct CPULoongArchState { + TCState active_tc; + CPULoongArchFPUContext active_fpu; + + uint32_t current_tc; + uint64_t scr[4]; + uint32_t current_fpu; + + uint32_t PABITS; +#define PABITS_BASE 36 + uint64_t PAMask; +#define PAMASK_BASE ((1ULL << PABITS_BASE) - 1) + + /* LoongArch CSR register */ + CPU_LOONGARCH_CSR + target_ulong lladdr; /* LL virtual address compared against SC */ + target_ulong llval; + + CPULoongArchFPUContext fpus[LOONGARCH_FPU_MAX]; + + /* QEMU */ + int error_code; + uint32_t hflags; /* CPU State */ +#define TLB_NOMATCH 0x1 +#define INST_INAVAIL 0x2 /* Invalid instruction word for BadInstr */ + /* TMASK defines different execution modes */ +#define LOONGARCH_HFLAG_TMASK 0x1F5807FF +#define LOONGARCH_HFLAG_KU 0x00003 /* kernel/supervisor/user mode mask */ +#define LOONGARCH_HFLAG_UM 0x00003 /* user mode flag */ +#define LOONGARCH_HFLAG_KM 0x00000 /* kernel mode flag */ +#define LOONGARCH_HFLAG_64 0x00008 /* 64-bit instructions enabled */ +#define LOONGARCH_HFLAG_FPU 0x00020 /* FPU enabled */ +#define LOONGARCH_HFLAG_F64 0x00040 /* 64-bit FPU enabled */ +#define LOONGARCH_HFLAG_BMASK 0x3800 +#define LOONGARCH_HFLAG_B 0x00800 /* Unconditional branch */ +#define LOONGARCH_HFLAG_BC 0x01000 /* Conditional branch */ +#define LOONGARCH_HFLAG_BR 0x02000 /* branch to register (can't link TB) */ +#define LOONGARCH_HFLAG_FRE 0x2000000 /* FRE enabled */ +#define LOONGARCH_HFLAG_ELPA 0x4000000 + target_ulong btarget; /* Jump / branch target */ + target_ulong bcond; /* Branch condition (if needed) */ + + uint64_t insn_flags; /* Supported instruction set */ + + /* Fields up to this point are cleared by a CPU reset */ + struct {} end_reset_fields; + + const loongarch_def_t *cpu_model; + void *irq[N_IRQS]; + QEMUTimer *timer; /* Internal timer */ + target_ulong exception_base; /* ExceptionBase input to the core */ +}; + +/** + * LoongArchCPU: + * @env: #CPULoongArchState + * @clock: this CPU input clock (may be connected + * to an output clock from another device). + * + * A LoongArch CPU. + */ +struct LoongArchCPU { + /*< private >*/ + CPUState parent_obj; + /*< public >*/ + + Clock *clock; + CPUNegativeOffsetState neg; + CPULoongArchState env; + uint32_t id; + int32_t node_id; /* NUMA node this CPU belongs to */ + int32_t core_id; +}; + +target_ulong exception_resume_pc(CPULoongArchState *env); + +static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, + target_ulong *pc, + target_ulong *cs_base, + uint32_t *flags) +{ + *pc = env->active_tc.PC; + *cs_base = 0; + *flags = env->hflags & (LOONGARCH_HFLAG_TMASK | LOONGARCH_HFLAG_BMASK); +} + +static inline LoongArchCPU *loongarch_env_get_cpu(CPULoongArchState *env) +{ + return container_of(env, LoongArchCPU, env); +} + +#define ENV_GET_CPU(e) CPU(loongarch_env_get_cpu(e)) + +void loongarch_cpu_list(void); + +#define CPU_INTERRUPT_WAKE CPU_INTERRUPT_TGT_INT_0 + +#define cpu_signal_handler cpu_loongarch_signal_handler +#define cpu_list loongarch_cpu_list + +/* MMU modes definitions */ +#define MMU_MODE0_SUFFIX _kernel +#define MMU_MODE1_SUFFIX _super +#define MMU_MODE2_SUFFIX _user +#define MMU_MODE3_SUFFIX _error +#define MMU_USER_IDX 2 + +static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch) +{ + return MMU_USER_IDX; +} + +typedef CPULoongArchState CPUArchState; +typedef LoongArchCPU ArchCPU; + +#include "exec/cpu-all.h" + +/* Exceptions */ +enum { + EXCP_NONE = -1, + EXCP_INTE = 0, + EXCP_ADE, + EXCP_SYSCALL, + EXCP_BREAK, + EXCP_FPDIS, + EXCP_INE, + EXCP_TRAP, + EXCP_FPE, + EXCP_TLBM, + EXCP_TLBL, + EXCP_TLBS, + EXCP_TLBPE, + EXCP_TLBXI, + EXCP_TLBRI, + + EXCP_LAST = EXCP_TLBRI, +}; + +int cpu_loongarch_signal_handler(int host_signum, void *pinfo, void *puc); + +#define LOONGARCH_CPU_TYPE_SUFFIX "-" TYPE_LOONGARCH_CPU +#define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX +#define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU + +#endif /* LOONGARCH_CPU_H */ diff --git a/target/loongarch/internal.h b/target/loongarch/internal.h new file mode 100644 index 0000000..e2394af --- /dev/null +++ b/target/loongarch/internal.h @@ -0,0 +1,74 @@ +/* + * LoongArch internal definitions and helpers. + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef LOONGARCH_INTERNAL_H +#define LOONGARCH_INTERNAL_H + +#include "exec/memattrs.h" + +enum loongarch_mmu_types { + MMU_TYPE_NONE, + MMU_TYPE_LS3A5K, +}; + +struct loongarch_def_t { + const char *name; + int32_t FCSR0; + int32_t FCSR0_MASK; + int32_t PABITS; + CPU_LOONGARCH_CSR + uint64_t INSN_FLAGS; + enum loongarch_mmu_types MMU_TYPE; +}; + +extern const struct loongarch_def_t loongarch_defs[]; +extern const int loongarch_defs_number; + +void loongarch_cpu_dump_state(CPUState *cpu, FILE *f, int flags); + +#define cpu_signal_handler cpu_loongarch_signal_handler + +void loongarch_tcg_init(void); + +void QEMU_NORETURN do_raise_exception_err(CPULoongArchState *env, + uint32_t exception, + int error_code, + uintptr_t pc); + +static inline void QEMU_NORETURN do_raise_exception(CPULoongArchState *env, + uint32_t exception, + uintptr_t pc) +{ + do_raise_exception_err(env, exception, 0, pc); +} + +static inline void restore_pamask(CPULoongArchState *env) +{ + if (env->hflags & LOONGARCH_HFLAG_ELPA) { + env->PAMask = (1ULL << env->PABITS) - 1; + } else { + env->PAMask = PAMASK_BASE; + } +} + +static inline void compute_hflags(CPULoongArchState *env) +{ + env->hflags &= ~(LOONGARCH_HFLAG_64 | LOONGARCH_HFLAG_FPU | + LOONGARCH_HFLAG_KU | LOONGARCH_HFLAG_ELPA); + + env->hflags |= (env->CSR_CRMD & CSR_CRMD_PLV); + env->hflags |= LOONGARCH_HFLAG_64; + + if (env->CSR_EUEN & CSR_EUEN_FPEN) { + env->hflags |= LOONGARCH_HFLAG_FPU; + } +} + +const char *loongarch_exception_name(int32_t exception); + +#endif