From patchwork Mon Apr 25 09:10:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaojuan Yang X-Patchwork-Id: 12825504 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 D5594C43217 for ; Mon, 25 Apr 2022 09:40:04 +0000 (UTC) Received: from localhost ([::1]:42806 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nivCN-0000Gi-Tt for qemu-devel@archiver.kernel.org; Mon, 25 Apr 2022 05:40:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48330) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1niukN-0008Gj-BX for qemu-devel@nongnu.org; Mon, 25 Apr 2022 05:11:11 -0400 Received: from mail.loongson.cn ([114.242.206.163]:39466 helo=loongson.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1niukK-0001IQ-Nn for qemu-devel@nongnu.org; Mon, 25 Apr 2022 05:11:07 -0400 Received: from localhost.localdomain (unknown [10.2.5.185]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxn8+DZWZi+7gwAA--.18850S28; Mon, 25 Apr 2022 17:10:51 +0800 (CST) From: Xiaojuan Yang To: qemu-devel@nongnu.org Subject: [PATCH v2 26/43] target/loongarch: Add LoongArch IOCSR instruction Date: Mon, 25 Apr 2022 17:10:10 +0800 Message-Id: <20220425091027.2877892-27-yangxiaojuan@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220425091027.2877892-1-yangxiaojuan@loongson.cn> References: <20220425091027.2877892-1-yangxiaojuan@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf9Dxn8+DZWZi+7gwAA--.18850S28 X-Coremail-Antispam: 1UD129KBjvAXoWfJry8AFyxZr4DArWfCF1fCrg_yoW8JrW3Wo W5AFW5Aa1rGrsavFnFk3yqvrW7tF9rArZ3AF93u3Z8Ga1kAFy3tFy5GanYy3yxtrn5KrW8 C34jgF15Ga4fXr93n29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73VFW2AGmfu7bjvjm3 AaLaJ3UjIYCTnIWjDUYxBIdaVFxhVjvjDU0xZFpf9x0zRUUUUUUUUU= 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: , Cc: mark.cave-ayland@ilande.co.uk, richard.henderson@linaro.org, gaosong@loongson.cn Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This includes: - IOCSR{RD/WR}.{B/H/W/D} Signed-off-by: Xiaojuan Yang Signed-off-by: Song Gao --- target/loongarch/cpu.c | 52 ++++++ target/loongarch/cpu.h | 25 +++ target/loongarch/disas.c | 8 + target/loongarch/helper.h | 8 + .../insn_trans/trans_privileged.c.inc | 35 ++++ target/loongarch/insns.decode | 9 + target/loongarch/iocsr_helper.c | 174 ++++++++++++++++++ target/loongarch/meson.build | 1 + 8 files changed, 312 insertions(+) create mode 100644 target/loongarch/iocsr_helper.c diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c index 6d6216a846..3167323821 100644 --- a/target/loongarch/cpu.c +++ b/target/loongarch/cpu.c @@ -17,6 +17,8 @@ #include "internals.h" #include "fpu/softfloat-helpers.h" #include "cpu-csr.h" +#include "sysemu/reset.h" +#include "hw/loader.h" const char * const regnames[32] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", @@ -483,14 +485,64 @@ static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp) lacc->parent_realize(dev, errp); } +static void loongarch_qemu_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ +} + +static uint64_t loongarch_qemu_read(void *opaque, hwaddr addr, unsigned size) +{ + switch (addr) { + case FEATURE_REG: + return 1UL << IOCSRF_MSI | 1UL << IOCSRF_EXTIOI | + 1UL << IOCSRF_CSRIPI; + case VENDOR_REG: + return 0x6e6f73676e6f6f4c; /* "Loongson" */ + case CPUNAME_REG: + return 0x303030354133; /* "3A5000" */ + case MISC_FUNC_REG: + return 1UL << IOCSRM_EXTIOI_EN; + } + return 0; +} + +static const MemoryRegionOps loongarch_qemu_ops = { + .read = loongarch_qemu_read, + .write = loongarch_qemu_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 8, + }, + .impl = { + .min_access_size = 8, + .max_access_size = 8, + }, +}; + +static void do_cpu_reset(void *opaque) +{ + LoongArchCPU *cpu = opaque; + + cpu_reset(CPU(cpu)); +} + static void loongarch_cpu_init(Object *obj) { LoongArchCPU *cpu = LOONGARCH_CPU(obj); + CPULoongArchState *env = &cpu->env; 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); + memory_region_init_io(&env->system_iocsr, OBJECT(cpu), NULL, + env, "iocsr", UINT64_MAX); + address_space_init(&env->address_space_iocsr, &env->system_iocsr, "IOCSR"); + qemu_register_reset(do_cpu_reset, cpu); + memory_region_init_io(&env->iocsr_mem, OBJECT(cpu), &loongarch_qemu_ops, + NULL, "iocsr_misc", 0x428); + memory_region_add_subregion(&env->system_iocsr, 0, &env->iocsr_mem); } static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model) diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index e907fe3c51..734f90168e 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -12,6 +12,27 @@ #include "fpu/softfloat-types.h" #include "hw/registerfields.h" #include "qemu/timer.h" +#include "exec/memory.h" +#include "hw/sysbus.h" + +#define IOCSRF_TEMP 0 +#define IOCSRF_NODECNT 1 +#define IOCSRF_MSI 2 +#define IOCSRF_EXTIOI 3 +#define IOCSRF_CSRIPI 4 +#define IOCSRF_FREQCSR 5 +#define IOCSRF_FREQSCALE 6 +#define IOCSRF_DVFSV1 7 +#define IOCSRF_GMOD 9 +#define IOCSRF_VM 11 + +#define FEATURE_REG 0x8 +#define VENDOR_REG 0x10 +#define CPUNAME_REG 0x20 +#define MISC_FUNC_REG 0x420 +#define IOCSRM_EXTIOI_EN 48 + +#define IOCSR_MEM_SIZE 0x428 #define TCG_GUEST_DEFAULT_MO (0) @@ -284,6 +305,10 @@ typedef struct CPUArchState { uint64_t CSR_DSAVE; LoongArchTLB tlb[LOONGARCH_TLB_MAX]; + + AddressSpace address_space_iocsr; + MemoryRegion system_iocsr; + MemoryRegion iocsr_mem; } CPULoongArchState; /** diff --git a/target/loongarch/disas.c b/target/loongarch/disas.c index c76b82dfdf..fcc06abc6b 100644 --- a/target/loongarch/disas.c +++ b/target/loongarch/disas.c @@ -609,6 +609,14 @@ INSN(bgeu, rr_offs) INSN(csrrd, r_csr) INSN(csrwr, r_csr) INSN(csrxchg, rr_csr) +INSN(iocsrrd_b, rr) +INSN(iocsrrd_h, rr) +INSN(iocsrrd_w, rr) +INSN(iocsrrd_d, rr) +INSN(iocsrwr_b, rr) +INSN(iocsrwr_h, rr) +INSN(iocsrwr_w, rr) +INSN(iocsrwr_d, rr) #define output_fcmp(C, PREFIX, SUFFIX) \ { \ diff --git a/target/loongarch/helper.h b/target/loongarch/helper.h index 5a6754eb65..4664a02dcf 100644 --- a/target/loongarch/helper.h +++ b/target/loongarch/helper.h @@ -100,3 +100,11 @@ DEF_HELPER_2(csrwr_estat, i64, env, tl) DEF_HELPER_2(csrwr_asid, i64, env, tl) DEF_HELPER_2(csrwr_tcfg, i64, env, tl) DEF_HELPER_2(csrwr_ticlr, i64, env, tl) +DEF_HELPER_2(iocsrrd_b, i64, env, tl) +DEF_HELPER_2(iocsrrd_h, i64, env, tl) +DEF_HELPER_2(iocsrrd_w, i64, env, tl) +DEF_HELPER_2(iocsrrd_d, i64, env, tl) +DEF_HELPER_3(iocsrwr_b, void, env, tl, tl) +DEF_HELPER_3(iocsrwr_h, void, env, tl, tl) +DEF_HELPER_3(iocsrwr_w, void, env, tl, tl) +DEF_HELPER_3(iocsrwr_d, void, env, tl, tl) diff --git a/target/loongarch/insn_trans/trans_privileged.c.inc b/target/loongarch/insn_trans/trans_privileged.c.inc index 0fc5d7935c..8a1c5b8511 100644 --- a/target/loongarch/insn_trans/trans_privileged.c.inc +++ b/target/loongarch/insn_trans/trans_privileged.c.inc @@ -256,3 +256,38 @@ static bool trans_csrxchg(DisasContext *ctx, arg_csrxchg *a) tcg_temp_free(oldv); return true; } + +static bool gen_iocsrrd(DisasContext *ctx, arg_rr *a, + void (*func)(TCGv, TCGv_ptr, TCGv)) +{ + TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE); + TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE); + + if (check_plv(ctx)) { + return false; + } + func(dest, cpu_env, src1); + return true; +} + +static bool gen_iocsrwr(DisasContext *ctx, arg_rr *a, + void (*func)(TCGv_ptr, TCGv, TCGv)) +{ + TCGv val = gpr_src(ctx, a->rd, EXT_NONE); + TCGv addr = gpr_src(ctx, a->rj, EXT_NONE); + + if (check_plv(ctx)) { + return false; + } + func(cpu_env, addr, val); + return true; +} + +TRANS(iocsrrd_b, gen_iocsrrd, gen_helper_iocsrrd_b) +TRANS(iocsrrd_h, gen_iocsrrd, gen_helper_iocsrrd_h) +TRANS(iocsrrd_w, gen_iocsrrd, gen_helper_iocsrrd_w) +TRANS(iocsrrd_d, gen_iocsrrd, gen_helper_iocsrrd_d) +TRANS(iocsrwr_b, gen_iocsrwr, gen_helper_iocsrwr_b) +TRANS(iocsrwr_h, gen_iocsrwr, gen_helper_iocsrwr_h) +TRANS(iocsrwr_w, gen_iocsrwr, gen_helper_iocsrwr_w) +TRANS(iocsrwr_d, gen_iocsrwr, gen_helper_iocsrwr_d) diff --git a/target/loongarch/insns.decode b/target/loongarch/insns.decode index 43005ca283..2b436d3cd6 100644 --- a/target/loongarch/insns.decode +++ b/target/loongarch/insns.decode @@ -450,3 +450,12 @@ bgeu 0110 11 ................ ..... ..... @rr_offs16 csrwr 0000 0100 .............. 00001 ..... @r_csr csrxchg 0000 0100 .............. ..... ..... @rr_csr } + +iocsrrd_b 0000 01100100 10000 00000 ..... ..... @rr +iocsrrd_h 0000 01100100 10000 00001 ..... ..... @rr +iocsrrd_w 0000 01100100 10000 00010 ..... ..... @rr +iocsrrd_d 0000 01100100 10000 00011 ..... ..... @rr +iocsrwr_b 0000 01100100 10000 00100 ..... ..... @rr +iocsrwr_h 0000 01100100 10000 00101 ..... ..... @rr +iocsrwr_w 0000 01100100 10000 00110 ..... ..... @rr +iocsrwr_d 0000 01100100 10000 00111 ..... ..... @rr diff --git a/target/loongarch/iocsr_helper.c b/target/loongarch/iocsr_helper.c new file mode 100644 index 0000000000..ce8e17fb12 --- /dev/null +++ b/target/loongarch/iocsr_helper.c @@ -0,0 +1,174 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * Helpers for IOCSR reads/writes + */ + +#include "qemu/osdep.h" +#include "qemu/main-loop.h" +#include "cpu.h" +#include "internals.h" +#include "qemu/host-utils.h" +#include "exec/helper-proto.h" +#include "exec/exec-all.h" +#include "exec/cpu_ldst.h" +#include "tcg/tcg-ldst.h" + +uint64_t helper_iocsrrd_b(CPULoongArchState *env, target_ulong r_addr) +{ + return address_space_ldub(&env->address_space_iocsr, r_addr, + MEMTXATTRS_UNSPECIFIED, NULL); +} + +uint64_t helper_iocsrrd_h(CPULoongArchState *env, target_ulong r_addr) +{ + return address_space_lduw(&env->address_space_iocsr, r_addr, + MEMTXATTRS_UNSPECIFIED, NULL); +} + +uint64_t helper_iocsrrd_w(CPULoongArchState *env, target_ulong r_addr) +{ + return address_space_ldl(&env->address_space_iocsr, r_addr, + MEMTXATTRS_UNSPECIFIED, NULL); +} + +uint64_t helper_iocsrrd_d(CPULoongArchState *env, target_ulong r_addr) +{ + return address_space_ldq(&env->address_space_iocsr, r_addr, + MEMTXATTRS_UNSPECIFIED, NULL); +} + +static int get_ipi_data(target_ulong val) +{ + int i, mask, data; + + data = val >> 32; + mask = (val >> 27) & 0xf; + + for (i = 0; i < 4; i++) { + if ((mask >> i) & 1) { + data &= ~(0xff << (i * 8)); + } + } + return data; +} + +static void check_ipi_send(CPULoongArchState *env, target_ulong val) +{ + int cpuid; + target_ulong data; + + cpuid = (val >> 16) & 0x3ff; + /* IPI status vector */ + data = 1 << (val & 0x1f); + + qemu_mutex_lock_iothread(); + CPUState *cs = qemu_get_cpu(cpuid); + env = cs->env_ptr; + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + loongarch_cpu_set_irq(cpu, IRQ_IPI, 1); + qemu_mutex_unlock_iothread(); + + address_space_stl(&env->address_space_iocsr, 0x1008, + data, MEMTXATTRS_UNSPECIFIED, NULL); +} + +static void check_mail_send(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + int cpuid; + uint32_t data; + + cpuid = (val >> 16) & 0x3ff; + w_addr = 0x1020 + (val & 0x1c); + env = (qemu_get_cpu(cpuid))->env_ptr; + data = get_ipi_data(val); + + address_space_stl(&env->address_space_iocsr, w_addr, + data, MEMTXATTRS_UNSPECIFIED, NULL); +} + +static void check_any_send(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + int cpuid; + uint32_t data; + + cpuid = (val >> 16) & 0x3ff; + w_addr = val & 0xffff; + env = (qemu_get_cpu(cpuid))->env_ptr; + data = get_ipi_data(val); + + address_space_stl(&env->address_space_iocsr, w_addr, + data, MEMTXATTRS_UNSPECIFIED, NULL); +} + +static bool check_iocsrwr(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + bool ret = true; + + /* + * For IPI send, Mailbox send and ANY send, adjust the addr and + * val accordingly. The IOCSR writes are turned to different + * MMIO writes respectively + */ + switch (w_addr) { + case 0x1040: /* IPI send */ + check_ipi_send(env, val); + ret = false; + break; + case 0x1048: /* Mail send */ + check_mail_send(env, w_addr, val); + ret = false; + break; + case 0x1158: /* ANY send */ + check_any_send(env, w_addr, val); + ret = false; + break; + default: + break; + } + return ret; +} + +void helper_iocsrwr_b(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + if (!check_iocsrwr(env, w_addr, val)) { + return; + } + address_space_stb(&env->address_space_iocsr, w_addr, + val, MEMTXATTRS_UNSPECIFIED, NULL); +} + +void helper_iocsrwr_h(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + if (!check_iocsrwr(env, w_addr, val)) { + return; + } + address_space_stw(&env->address_space_iocsr, w_addr, + val, MEMTXATTRS_UNSPECIFIED, NULL); +} + +void helper_iocsrwr_w(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + if (!check_iocsrwr(env, w_addr, val)) { + return; + } + address_space_stl(&env->address_space_iocsr, w_addr, + val, MEMTXATTRS_UNSPECIFIED, NULL); +} + +void helper_iocsrwr_d(CPULoongArchState *env, target_ulong w_addr, + target_ulong val) +{ + if (!check_iocsrwr(env, w_addr, val)) { + return; + } + address_space_stq(&env->address_space_iocsr, w_addr, + val, MEMTXATTRS_UNSPECIFIED, NULL); +} diff --git a/target/loongarch/meson.build b/target/loongarch/meson.build index d11829a6cc..74e5f3b2a7 100644 --- a/target/loongarch/meson.build +++ b/target/loongarch/meson.build @@ -20,6 +20,7 @@ loongarch_softmmu_ss.add(files( 'tlb_helper.c', 'constant_timer.c', 'csr_helper.c', + 'iocsr_helper.c', )) loongarch_ss.add_all(when: 'CONFIG_TCG', if_true: [loongarch_tcg_ss])