[RFC PATCH v3 15/27] hw/loongarch: Add support loongson3-ls7a machine type.

From: Xiaojuan Yang <yangxiaojuan@loongson.cn>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, thuth@redhat.com,
	chenhuacai@loongson.cn, philmd@redhat.com, i.qemu@xen0n.name,
	mark.cave-ayland@ilande.co.uk, laurent@vivier.eu,
	peterx@redhat.com, f4bug@amsat.org, yangxiaojuan@loongson.cn,
	alistair.francis@wdc.com, maobibo@loongson.cn,
	pbonzini@redhat.com, richard.henderson@linaro.org,
	alex.bennee@linaro.org, gaosong@loongson.cn
Subject: [RFC PATCH v3 15/27] hw/loongarch: Add support loongson3-ls7a machine type.
Date: Sat,  4 Dec 2021 20:07:13 +0800	[thread overview]
Message-ID: <1638619645-11283-16-git-send-email-yangxiaojuan@loongson.cn> (raw)
In-Reply-To: <1638619645-11283-1-git-send-email-yangxiaojuan@loongson.cn>

Emulate a 3A5000 board use the new loongarch instruction.
3A5000 belongs to the Loongson3 series processors.
The board consists of a 3A5000 cpu model and the 7A1000
bridge. The host 3A5000 board is really complicated and
contains many functions.Now for the tcg softmmu mode
only part functions are emulated.

More detailed info you can see
https://github.com/loongson/LoongArch-Documentation

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
---
 .../devices/loongarch64-softmmu/default.mak   |   3 +
 configs/targets/loongarch64-softmmu.mak       |   3 +
 hw/Kconfig                                    |   1 +
 hw/loongarch/Kconfig                          |   3 +
 hw/loongarch/loongson3.c                      | 160 ++++++++++++++++++
 hw/loongarch/meson.build                      |   4 +
 hw/meson.build                                |   1 +
 include/exec/poison.h                         |   2 +
 include/hw/loongarch/loongarch.h              |  48 ++++++
 include/sysemu/arch_init.h                    |   1 +
 qapi/machine.json                             |   2 +-
 target/Kconfig                                |   1 +
 target/loongarch/Kconfig                      |   2 +
 target/loongarch/cpu.c                        |   8 +
 target/loongarch/cpu.h                        |   4 +
 15 files changed, 242 insertions(+), 1 deletion(-)
 create mode 100644 configs/devices/loongarch64-softmmu/default.mak
 create mode 100644 hw/loongarch/Kconfig
 create mode 100644 hw/loongarch/loongson3.c
 create mode 100644 hw/loongarch/meson.build
 create mode 100644 include/hw/loongarch/loongarch.h
 create mode 100644 target/loongarch/Kconfig

diff --git a/configs/devices/loongarch64-softmmu/default.mak b/configs/devices/loongarch64-softmmu/default.mak
new file mode 100644
index 0000000000..973ce4c30a
--- /dev/null
+++ b/configs/devices/loongarch64-softmmu/default.mak
@@ -0,0 +1,3 @@
+# Default configuration for loongarch64-softmmu
+
+CONFIG_LOONGSON3_LS7A=y
diff --git a/configs/targets/loongarch64-softmmu.mak b/configs/targets/loongarch64-softmmu.mak
index f33fa1590b..7bc06c850c 100644
--- a/configs/targets/loongarch64-softmmu.mak
+++ b/configs/targets/loongarch64-softmmu.mak
@@ -1 +1,4 @@
+TARGET_ARCH=loongarch64
+TARGET_BASE_ARCH=loongarch
+TARGET_SUPPORTS_MTTCG=y
 TARGET_XML_FILES= gdb-xml/loongarch-base64.xml gdb-xml/loongarch-fpu64.xml
diff --git a/hw/Kconfig b/hw/Kconfig
index ad20cce0a9..f71b2155ed 100644
--- a/hw/Kconfig
+++ b/hw/Kconfig
@@ -49,6 +49,7 @@ source avr/Kconfig
 source cris/Kconfig
 source hppa/Kconfig
 source i386/Kconfig
+source loongarch/Kconfig
 source m68k/Kconfig
 source microblaze/Kconfig
 source mips/Kconfig
diff --git a/hw/loongarch/Kconfig b/hw/loongarch/Kconfig
new file mode 100644
index 0000000000..ae8498de6a
--- /dev/null
+++ b/hw/loongarch/Kconfig
@@ -0,0 +1,3 @@
+config LOONGSON3_LS7A
+    bool
+    select PCI_EXPRESS_7A
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
new file mode 100644
index 0000000000..28b623e927
--- /dev/null
+++ b/hw/loongarch/loongson3.c
@@ -0,0 +1,160 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU loongson 3a5000 develop board emulation
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/units.h"
+#include "qemu/datadir.h"
+#include "qapi/error.h"
+#include "hw/boards.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/qtest.h"
+#include "sysemu/runstate.h"
+#include "sysemu/reset.h"
+#include "hw/loongarch/loongarch.h"
+#include "hw/pci-host/ls7a.h"
+
+
+static void loongarch_cpu_reset(void *opaque)
+{
+    LoongArchCPU *cpu = opaque;
+
+    cpu_reset(CPU(cpu));
+}
+
+#define LOONGARCH_SIMPLE_MMIO_OPS(ADDR, NAME, SIZE) \
+({\
+     MemoryRegion *iomem = g_new(MemoryRegion, 1);\
+     memory_region_init_io(iomem, NULL, &loongarch_qemu_ops,\
+                           (void *)ADDR, NAME, SIZE);\
+     memory_region_add_subregion(&lams->system_iocsr, ADDR, iomem);\
+})
+
+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)
+{
+    uint64_t feature = 0UL;
+    addr = ((hwaddr)(long)opaque) + addr;
+
+    switch (addr) {
+    case FEATURE_REG:
+        feature |= 1UL << IOCSRF_MSI | 1UL << IOCSRF_EXTIOI |
+                   1UL << IOCSRF_CSRIPI;
+        return feature ;
+    case VENDOR_REG:
+        return *(uint64_t *)"Loongson-3A5000";
+    case CPUNAME_REG:
+        return *(uint64_t *)"3A5000";
+    }
+    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 = 4,
+        .max_access_size = 8,
+    },
+};
+
+static void loongson3_init(MachineState *machine)
+{
+    const char *cpu_model = machine->cpu_type;
+    LoongArchCPU *cpu;
+    ram_addr_t offset = 0;
+    ram_addr_t ram_size = machine->ram_size;
+    uint64_t highram_size = 0;
+    MemoryRegion *address_space_mem = get_system_memory();
+    LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
+    int i;
+
+    if (!cpu_model) {
+        cpu_model = LOONGARCH_CPU_TYPE_NAME("Loongson-3A5000");
+    }
+    if (!strstr(cpu_model, "Loongson-3A5000")) {
+        error_report("LoongArch/TCG needs cpu type Loongson-3A5000");
+        exit(1);
+    }
+
+    memory_region_init_io(&lams->system_iocsr, NULL, NULL,
+                          lams, "iocsr", UINT64_MAX);
+    address_space_init(&lams->address_space_iocsr,
+                       &lams->system_iocsr, "IOCSR");
+
+    /* Init CPUs */
+    for (i = 0; i < machine->smp.cpus; i++) {
+        Object *cpuobj = NULL;
+        CPUState *cs;
+
+        cpuobj = object_new(machine->cpu_type);
+
+        cs = CPU(cpuobj);
+        cs->cpu_index = i;
+
+        qdev_realize(DEVICE(cpuobj), NULL, &error_fatal);
+        object_unref(cpuobj);
+
+        cpu = LOONGARCH_CPU(cs);
+        if (cpu == NULL) {
+            fprintf(stderr, "Unable to find CPU definition\n");
+            exit(1);
+        }
+        qemu_register_reset(loongarch_cpu_reset, cpu);
+    }
+
+    memory_region_init_alias(&lams->lowmem, NULL, "loongarch.lowram",
+                             machine->ram, 0, 256 * MiB);
+    memory_region_add_subregion(address_space_mem, offset, &lams->lowmem);
+    offset += 256 * MiB;
+
+    highram_size = ram_size - 256 * MiB;
+    memory_region_init_alias(&lams->highmem, NULL, "loongarch.highmem",
+                             machine->ram, offset, highram_size);
+    memory_region_add_subregion(address_space_mem, 0x90000000, &lams->highmem);
+    offset += highram_size;
+
+    LOONGARCH_SIMPLE_MMIO_OPS(FEATURE_REG, "loongarch_feature", 0x8);
+    LOONGARCH_SIMPLE_MMIO_OPS(VENDOR_REG, "loongarch_vendor", 0x8);
+    LOONGARCH_SIMPLE_MMIO_OPS(CPUNAME_REG, "loongarch_cpuname", 0x8);
+}
+
+static void loongarch_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    mc->desc = "Loongson-3A5000 LS7A1000 machine";
+    mc->init = loongson3_init;
+    mc->default_ram_size = 1 * GiB;
+    mc->default_cpu_type = LOONGARCH_CPU_TYPE_NAME("Loongson-3A5000");
+    mc->default_ram_id = "loongarch.ram";
+    mc->max_cpus = LOONGARCH_MAX_VCPUS;
+    mc->is_default = 1;
+    mc->default_kernel_irqchip_split = false;
+    mc->block_default_type = IF_VIRTIO;
+    mc->default_boot_order = "c";
+    mc->no_cdrom = 1;
+}
+
+static const TypeInfo loongarch_machine_types[] = {
+    {
+        .name           = TYPE_LOONGARCH_MACHINE,
+        .parent         = TYPE_MACHINE,
+        .instance_size  = sizeof(LoongArchMachineState),
+        .class_init     = loongarch_class_init,
+    }
+};
+
+DEFINE_TYPES(loongarch_machine_types)
diff --git a/hw/loongarch/meson.build b/hw/loongarch/meson.build
new file mode 100644
index 0000000000..1db3529cbc
--- /dev/null
+++ b/hw/loongarch/meson.build
@@ -0,0 +1,4 @@
+loongarch_ss = ss.source_set()
+loongarch_ss.add(when: 'CONFIG_LOONGSON3_LS7A', if_true: files('loongson3.c'))
+
+hw_arch += {'loongarch': loongarch_ss}
diff --git a/hw/meson.build b/hw/meson.build
index b3366c888e..95202649b7 100644
--- a/hw/meson.build
+++ b/hw/meson.build
@@ -49,6 +49,7 @@ subdir('avr')
 subdir('cris')
 subdir('hppa')
 subdir('i386')
+subdir('loongarch')
 subdir('m68k')
 subdir('microblaze')
 subdir('mips')
diff --git a/include/exec/poison.h b/include/exec/poison.h
index 7ad4ad18e8..590bc305c7 100644
--- a/include/exec/poison.h
+++ b/include/exec/poison.h
@@ -14,6 +14,7 @@
 #pragma GCC poison TARGET_CRIS
 #pragma GCC poison TARGET_HEXAGON
 #pragma GCC poison TARGET_HPPA
+#pragma GCC poison TARGET_LOONGARCH64
 #pragma GCC poison TARGET_M68K
 #pragma GCC poison TARGET_MICROBLAZE
 #pragma GCC poison TARGET_MIPS
@@ -73,6 +74,7 @@
 #pragma GCC poison CONFIG_HPPA_DIS
 #pragma GCC poison CONFIG_I386_DIS
 #pragma GCC poison CONFIG_HEXAGON_DIS
+#pragma GCC poison CONFIG_LOONGARCH_DIS
 #pragma GCC poison CONFIG_M68K_DIS
 #pragma GCC poison CONFIG_MICROBLAZE_DIS
 #pragma GCC poison CONFIG_MIPS_DIS
diff --git a/include/hw/loongarch/loongarch.h b/include/hw/loongarch/loongarch.h
new file mode 100644
index 0000000000..150403c93d
--- /dev/null
+++ b/include/hw/loongarch/loongarch.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Definitions for loongarch board emulation.
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef HW_LOONGARCH_H
+#define HW_LOONGARCH_H
+
+#include "target/loongarch/cpu.h"
+#include "qemu-common.h"
+#include "hw/boards.h"
+#include "qemu/queue.h"
+
+#define LOONGARCH_MAX_VCPUS     4
+#define PM_MMIO_ADDR            0x10080000UL
+#define PM_MMIO_SIZE            0x100
+#define PM_CNT_MODE             0x10
+#define FEATURE_REG             0x8
+#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 VENDOR_REG              0x10
+#define CPUNAME_REG             0x20
+
+typedef struct LoongArchMachineState {
+    /*< private >*/
+    MachineState parent_obj;
+
+    AddressSpace address_space_iocsr;
+    MemoryRegion system_iocsr;
+    MemoryRegion lowmem;
+    MemoryRegion highmem;
+} LoongArchMachineState;
+
+#define TYPE_LOONGARCH_MACHINE  MACHINE_TYPE_NAME("loongson3-ls7a")
+DECLARE_INSTANCE_CHECKER(LoongArchMachineState, LOONGARCH_MACHINE,
+                         TYPE_LOONGARCH_MACHINE)
+#endif
diff --git a/include/sysemu/arch_init.h b/include/sysemu/arch_init.h
index 70c579560a..3ac3634bbb 100644
--- a/include/sysemu/arch_init.h
+++ b/include/sysemu/arch_init.h
@@ -24,6 +24,7 @@ enum {
     QEMU_ARCH_RX = (1 << 20),
     QEMU_ARCH_AVR = (1 << 21),
     QEMU_ARCH_HEXAGON = (1 << 22),
+    QEMU_ARCH_LOONGARCH = (1 << 23),
 };
 
 extern const uint32_t arch_type;
diff --git a/qapi/machine.json b/qapi/machine.json
index 067e3f5378..510ad6e566 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -30,7 +30,7 @@
 ##
 { 'enum' : 'SysEmuTarget',
   'data' : [ 'aarch64', 'alpha', 'arm', 'avr', 'cris', 'hppa', 'i386',
-             'm68k', 'microblaze', 'microblazeel', 'mips', 'mips64',
+             'loongarch64', 'm68k', 'microblaze', 'microblazeel', 'mips', 'mips64',
              'mips64el', 'mipsel', 'nios2', 'or1k', 'ppc',
              'ppc64', 'riscv32', 'riscv64', 'rx', 's390x', 'sh4',
              'sh4eb', 'sparc', 'sparc64', 'tricore',
diff --git a/target/Kconfig b/target/Kconfig
index ae7f24fc66..83da0bd293 100644
--- a/target/Kconfig
+++ b/target/Kconfig
@@ -4,6 +4,7 @@ source avr/Kconfig
 source cris/Kconfig
 source hppa/Kconfig
 source i386/Kconfig
+source loongarch/Kconfig
 source m68k/Kconfig
 source microblaze/Kconfig
 source mips/Kconfig
diff --git a/target/loongarch/Kconfig b/target/loongarch/Kconfig
new file mode 100644
index 0000000000..46b26b1a85
--- /dev/null
+++ b/target/loongarch/Kconfig
@@ -0,0 +1,2 @@
+config LOONGARCH64
+    bool
diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 6d3839ea10..62c2a4d813 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -11,6 +11,7 @@
 #include "qemu/module.h"
 #include "sysemu/qtest.h"
 #include "exec/exec-all.h"
+#include "hw/qdev-properties.h"
 #include "qapi/qapi-commands-machine-target.h"
 #include "cpu.h"
 #include "internals.h"
@@ -521,6 +522,12 @@ static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model)
     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_END_OF_LIST()
+};
+
 void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags)
 {
     LoongArchCPU *cpu = LOONGARCH_CPU(cs);
@@ -603,6 +610,7 @@ static void loongarch_cpu_class_init(ObjectClass *c, void *data)
     device_class_set_parent_realize(dc, loongarch_cpu_realizefn,
                                     &lacc->parent_realize);
     device_class_set_parent_reset(dc, loongarch_cpu_reset, &lacc->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;
diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 37cbe8924e..01bed0786c 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -16,6 +16,8 @@
 
 #define TCG_GUEST_DEFAULT_MO (0)
 
+#define UNASSIGNED_CPU_ID 0xFFFFFFFF
+
 #define FCSR0_M1    0x1f         /* FCSR1 mask, Enables */
 #define FCSR0_M2    0x1f1f0000   /* FCSR2 mask, Cause and Flags */
 #define FCSR0_M3    0x300        /* FCSR3 mask, Round Mode */
@@ -362,6 +364,8 @@ struct LoongArchCPU {
     CPUNegativeOffsetState neg;
     CPULoongArchState env;
     QEMUTimer timer; /* Internal timer */
+    uint32_t id;
+    int32_t core_id;
 };
 
 #define TYPE_LOONGARCH_CPU "loongarch-cpu"
-- 
2.27.0


