hw/loongarch: Add support loongson3 virt machine type.

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 virt
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>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220606124333.2060567-31-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/MAINTAINERS b/MAINTAINERS
index e3f8750..0c54c03 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1129,6 +1129,10 @@ M: Xiaojuan Yang <yangxiaojuan@loongson.cn>
 M: Song Gao <gaosong@loongson.cn>
 S: Maintained
 F: docs/system/loongarch/loongson3.rst
+F: configs/targets/loongarch64-softmmu.mak
+F: configs/devices/loongarch64-softmmu/default.mak
+F: hw/loongarch/
+F: include/hw/loongarch/virt.h
 
 M68K Machines
 -------------

diff --git a/configs/devices/loongarch64-softmmu/default.mak b/configs/devices/loongarch64-softmmu/default.mak
new file mode 100644 (file)
index 0000000..928bc11
--- /dev/null
+++ b/configs/devices/loongarch64-softmmu/default.mak
@@ -0,0 +1,3 @@
+# Default configuration for loongarch64-softmmu
+
+CONFIG_LOONGARCH_VIRT=y

diff --git a/configs/targets/loongarch64-softmmu.mak b/configs/targets/loongarch64-softmmu.mak
new file mode 100644 (file)
index 0000000..6661540
--- /dev/null
+++ b/configs/targets/loongarch64-softmmu.mak
@@ -0,0 +1,3 @@
+TARGET_ARCH=loongarch64
+TARGET_BASE_ARCH=loongarch
+TARGET_SUPPORTS_MTTCG=y

diff --git a/hw/Kconfig b/hw/Kconfig
index 50e0952..38233bb 100644 (file)
--- a/hw/Kconfig
+++ b/hw/Kconfig
@@ -50,6 +50,7 @@ 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 (file)
index 0000000..13e8501
--- /dev/null
+++ b/hw/loongarch/Kconfig
@@ -0,0 +1,4 @@
+config LOONGARCH_VIRT
+    bool
+    select PCI
+    select PCI_EXPRESS_GENERIC_BRIDGE

diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c
new file mode 100644 (file)
index 0000000..7df32f7
--- /dev/null
+++ b/hw/loongarch/loongson3.c
@@ -0,0 +1,94 @@
+/* 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/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 "sysemu/rtc.h"
+#include "hw/loongarch/virt.h"
+#include "exec/address-spaces.h"
+#include "target/loongarch/cpu.h"
+
+static void loongarch_init(MachineState *machine)
+{
+    const char *cpu_model = machine->cpu_type;
+    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("la464");
+    }
+
+    if (!strstr(cpu_model, "la464")) {
+        error_report("LoongArch/TCG needs cpu type la464");
+        exit(1);
+    }
+
+    if (ram_size < 1 * GiB) {
+        error_report("ram_size must be greater than 1G.");
+        exit(1);
+    }
+
+    /* Init CPUs */
+    for (i = 0; i < machine->smp.cpus; i++) {
+        cpu_create(machine->cpu_type);
+    }
+
+    /* Add memory region */
+    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);
+
+    /* Add isa io region */
+    memory_region_init_alias(&lams->isa_io, NULL, "isa-io",
+                             get_system_io(), 0, LOONGARCH_ISA_IO_SIZE);
+    memory_region_add_subregion(address_space_mem, LOONGARCH_ISA_IO_BASE,
+                                &lams->isa_io);
+}
+
+static void loongarch_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    mc->desc = "Loongson-3A5000 LS7A1000 machine";
+    mc->init = loongarch_init;
+    mc->default_ram_size = 1 * GiB;
+    mc->default_cpu_type = LOONGARCH_CPU_TYPE_NAME("la464");
+    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 (file)
index 0000000..cecb1a5
--- /dev/null
+++ b/hw/loongarch/meson.build
@@ -0,0 +1,4 @@
+loongarch_ss = ss.source_set()
+loongarch_ss.add(when: 'CONFIG_LOONGARCH_VIRT', if_true: files('loongson3.c'))
+
+hw_arch += {'loongarch': loongarch_ss}

diff --git a/hw/meson.build b/hw/meson.build
index 9992c51..c7ac7d3 100644 (file)
--- a/hw/meson.build
+++ b/hw/meson.build
@@ -50,6 +50,7 @@ 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 9f1ca34..bbb82cf 100644 (file)
--- 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
@@ -71,6 +72,7 @@
 #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/virt.h b/include/hw/loongarch/virt.h
new file mode 100644 (file)
index 0000000..4a4bb3f
--- /dev/null
+++ b/include/hw/loongarch/virt.h
@@ -0,0 +1,31 @@
+/* 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 "hw/boards.h"
+#include "qemu/queue.h"
+
+#define LOONGARCH_MAX_VCPUS     4
+
+#define LOONGARCH_ISA_IO_BASE   0x18000000UL
+#define LOONGARCH_ISA_IO_SIZE   0x0004000
+
+struct LoongArchMachineState {
+    /*< private >*/
+    MachineState parent_obj;
+
+    MemoryRegion lowmem;
+    MemoryRegion highmem;
+    MemoryRegion isa_io;
+};
+
+#define TYPE_LOONGARCH_MACHINE  MACHINE_TYPE_NAME("virt")
+OBJECT_DECLARE_SIMPLE_TYPE(LoongArchMachineState, LOONGARCH_MACHINE)
+#endif

diff --git a/include/sysemu/arch_init.h b/include/sysemu/arch_init.h
index 79c2591..8850cb1 100644 (file)
--- 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 883ce3f..f750a16 100644 (file)
--- 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 ae7f24f..83da0bd 100644 (file)
--- 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 (file)
index 0000000..46b26b1
--- /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 b846bd1..3b7d628 100644 (file)
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -82,6 +82,8 @@ static void loongarch_cpu_set_pc(CPUState *cs, vaddr value)
     env->pc = value;
 }
 
+#include "hw/loongarch/virt.h"
+
 void loongarch_cpu_set_irq(void *opaque, int irq, int level)
 {
     LoongArchCPU *cpu = opaque;