From patchwork Tue May 17 11:30:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaojuan Yang X-Patchwork-Id: 12852444 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id BC6B6C433EF for ; Tue, 17 May 2022 13:05:48 +0000 (UTC) Received: from localhost ([::1]:52720 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nqwtX-0000ja-Q5 for qemu-devel@archiver.kernel.org; Tue, 17 May 2022 09:05:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42738) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nqvXS-0001Sk-1o for qemu-devel@nongnu.org; Tue, 17 May 2022 07:38:57 -0400 Received: from mail.loongson.cn ([114.242.206.163]:54352 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nqvXP-00032N-4v for qemu-devel@nongnu.org; Tue, 17 May 2022 07:38:53 -0400 Received: from localhost.localdomain (unknown [10.2.5.185]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9BxcNpPh4Ni4sEZAA--.25635S26; Tue, 17 May 2022 19:30:53 +0800 (CST) From: Xiaojuan Yang To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, gaosong@loongson.cn, mark.cave-ayland@ilande.co.uk, mst@redhat.com, imammedo@redhat.com, ani@anisinha.ca Subject: [PATCH v4 24/43] target/loongarch: Add constant timer support Date: Tue, 17 May 2022 19:30:04 +0800 Message-Id: <20220517113023.3051143-25-yangxiaojuan@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220517113023.3051143-1-yangxiaojuan@loongson.cn> References: <20220517113023.3051143-1-yangxiaojuan@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf9BxcNpPh4Ni4sEZAA--.25635S26 X-Coremail-Antispam: 1UD129KBjvJXoW3XFyUXFy8Zw15ZF17KFW7Jwb_yoW7Xr4Dpr Zrur98tr48t39xWas7Ja98Xrn8Xw17WF12vaySkFW0kwsrXw1xX3Wkt39rZF15Za48WrW2 qFn5Z3WYgF4xJaUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: p1dqw5xldry3tdq6z05rqj20fqof0/ Received-SPF: pass client-ip=114.242.206.163; envelope-from=yangxiaojuan@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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Xiaojuan Yang Signed-off-by: Song Gao Reviewed-by: Richard Henderson --- target/loongarch/constant_timer.c | 64 +++++++++++++++++++++++++++++++ target/loongarch/cpu.c | 2 + target/loongarch/cpu.h | 4 ++ target/loongarch/internals.h | 6 +++ target/loongarch/meson.build | 1 + 5 files changed, 77 insertions(+) create mode 100644 target/loongarch/constant_timer.c diff --git a/target/loongarch/constant_timer.c b/target/loongarch/constant_timer.c new file mode 100644 index 0000000000..1851f53fd6 --- /dev/null +++ b/target/loongarch/constant_timer.c @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * QEMU LoongArch constant timer support + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + */ + +#include "qemu/osdep.h" +#include "qemu/timer.h" +#include "cpu.h" +#include "internals.h" +#include "cpu-csr.h" + +#define TIMER_PERIOD 10 /* 10 ns period for 100 MHz frequency */ +#define CONSTANT_TIMER_TICK_MASK 0xfffffffffffcUL +#define CONSTANT_TIMER_ENABLE 0x1UL + +uint64_t cpu_loongarch_get_constant_timer_counter(LoongArchCPU *cpu) +{ + return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / TIMER_PERIOD; +} + +uint64_t cpu_loongarch_get_constant_timer_ticks(LoongArchCPU *cpu) +{ + uint64_t now, expire; + + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + expire = timer_expire_time_ns(&cpu->timer); + + return (expire - now) / TIMER_PERIOD; +} + +void cpu_loongarch_store_constant_timer_config(LoongArchCPU *cpu, + uint64_t value) +{ + CPULoongArchState *env = &cpu->env; + uint64_t now, next; + + env->CSR_TCFG = value; + if (value & CONSTANT_TIMER_ENABLE) { + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + next = now + (value & CONSTANT_TIMER_TICK_MASK) * TIMER_PERIOD; + timer_mod(&cpu->timer, next); + } else { + timer_del(&cpu->timer); + } +} + +void loongarch_constant_timer_cb(void *opaque) +{ + LoongArchCPU *cpu = opaque; + CPULoongArchState *env = &cpu->env; + uint64_t now, next; + + if (FIELD_EX64(env->CSR_TCFG, CSR_TCFG, PERIODIC)) { + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + next = now + (env->CSR_TCFG & CONSTANT_TIMER_TICK_MASK) * TIMER_PERIOD; + timer_mod(&cpu->timer, next); + } else { + env->CSR_TCFG = FIELD_DP64(env->CSR_TCFG, CSR_TCFG, EN, 0); + } + + loongarch_cpu_set_irq(opaque, IRQ_TIMER, 1); +} diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index e3b220182b..2afbd1fd3c 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -489,6 +489,8 @@ static void loongarch_cpu_init(Object *obj) cpu_set_cpustate_pointers(cpu); qdev_init_gpio_in(DEVICE(cpu), loongarch_cpu_set_irq, N_IRQS); + timer_init_ns(&cpu->timer, QEMU_CLOCK_VIRTUAL, + &loongarch_constant_timer_cb, cpu); } static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model) diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index b983ce241c..2081902f2e 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -11,6 +11,7 @@ #include "exec/cpu-defs.h" #include "fpu/softfloat-types.h" #include "hw/registerfields.h" +#include "qemu/timer.h" #define TCG_GUEST_DEFAULT_MO (0) @@ -185,6 +186,8 @@ extern const char * const regnames[32]; extern const char * const fregnames[32]; #define N_IRQS 13 +#define IRQ_TIMER 11 +#define IRQ_IPI 12 #define LOONGARCH_STLB 2048 /* 2048 STLB */ #define LOONGARCH_MTLB 64 /* 64 MTLB */ @@ -295,6 +298,7 @@ struct ArchCPU { CPUNegativeOffsetState neg; CPULoongArchState env; + QEMUTimer timer; }; #define TYPE_LOONGARCH_CPU "loongarch-cpu" diff --git a/target/loongarch/internals.h b/target/loongarch/internals.h index 69183e8bb5..4b1bcd7c0f 100644 --- a/target/loongarch/internals.h +++ b/target/loongarch/internals.h @@ -32,6 +32,12 @@ extern const VMStateDescription vmstate_loongarch_cpu; void loongarch_cpu_set_irq(void *opaque, int irq, int level); +void loongarch_constant_timer_cb(void *opaque); +uint64_t cpu_loongarch_get_constant_timer_counter(LoongArchCPU *cpu); +uint64_t cpu_loongarch_get_constant_timer_ticks(LoongArchCPU *cpu); +void cpu_loongarch_store_constant_timer_config(LoongArchCPU *cpu, + uint64_t value); + bool loongarch_cpu_tlb_fill(CPUState *cs, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr); diff --git a/target/loongarch/meson.build b/target/loongarch/meson.build index 435cc75999..04e15ba1e3 100644 --- a/target/loongarch/meson.build +++ b/target/loongarch/meson.build @@ -18,6 +18,7 @@ loongarch_softmmu_ss = ss.source_set() loongarch_softmmu_ss.add(files( 'machine.c', 'tlb_helper.c', + 'constant_timer.c', )) loongarch_ss.add_all(when: 'CONFIG_TCG', if_true: [loongarch_tcg_ss])