From: Brian Cain <bc...@quicinc.com>
Signed-off-by: Brian Cain <brian.c...@oss.qualcomm.com>
---
configs/devices/hexagon-softmmu/default.mak | 1 +
configs/targets/hexagon-softmmu.mak | 1 +
include/hw/hexagon/virt.h | 41 ++
hw/hexagon/virt.c | 395 ++++++++++++++++++++
target/hexagon/cpu.c | 2 +-
hw/hexagon/Kconfig | 8 +
hw/hexagon/meson.build | 2 +
7 files changed, 449 insertions(+), 1 deletion(-)
create mode 100644 include/hw/hexagon/virt.h
create mode 100644 hw/hexagon/virt.c
diff --git a/configs/devices/hexagon-softmmu/default.mak
b/configs/devices/hexagon-softmmu/default.mak
index 08e709aea7..37b4f9f323 100644
--- a/configs/devices/hexagon-softmmu/default.mak
+++ b/configs/devices/hexagon-softmmu/default.mak
@@ -3,5 +3,6 @@
# Uncomment the following lines to disable these optional devices:
# Boards are selected by default, uncomment to keep out of the build.
+# CONFIG_HEX_VIRT=y
# CONFIG_HEX_DSP=y
# CONFIG_L2VIC=y
diff --git a/configs/targets/hexagon-softmmu.mak
b/configs/targets/hexagon-softmmu.mak
index 8c208bf468..9f8fca1dc1 100644
--- a/configs/targets/hexagon-softmmu.mak
+++ b/configs/targets/hexagon-softmmu.mak
@@ -4,3 +4,4 @@ TARGET_ARCH=hexagon
TARGET_SUPPORTS_MTTCG=y
TARGET_XML_FILES=gdb-xml/hexagon-core.xml gdb-xml/hexagon-hvx.xml
gdb-xml/hexagon-sys.xml
TARGET_LONG_BITS=32
+TARGET_NEED_FDT=y
diff --git a/include/hw/hexagon/virt.h b/include/hw/hexagon/virt.h
new file mode 100644
index 0000000000..0c165a786d
--- /dev/null
+++ b/include/hw/hexagon/virt.h
@@ -0,0 +1,41 @@
+/*
+ * Definitions for hexagon virt board.
+ *
+ * Copyright (c) 2024-2025 Qualcomm Innovation Center, Inc. All Rights
Reserved.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_HEXAGONVIRT_H
+#define HW_HEXAGONVIRT_H
+
+#include "hw/boards.h"
+#include "target/hexagon/cpu.h"
+
+struct HexagonVirtMachineState {
+ /*< private >*/
+ MachineState parent_obj;
+
+ int fdt_size;
+ MemoryRegion *sys;
+ MemoryRegion cfgtable;
+ MemoryRegion ram;
+ MemoryRegion tcm;
+ MemoryRegion vtcm;
+ DeviceState *l2vic;
+};
+
+void hexagon_load_fdt(const struct HexagonVirtMachineState *vms);
+
+enum {
+ VIRT_UART0,
+ VIRT_QTMR0,
+ VIRT_QTMR1,
+ VIRT_GPT,
+ VIRT_MMIO,
+ VIRT_FDT,
+};
+
+#define TYPE_HEXAGON_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
+OBJECT_DECLARE_SIMPLE_TYPE(HexagonVirtMachineState, HEXAGON_VIRT_MACHINE)
+
+#endif /* HW_HEXAGONVIRT_H */
diff --git a/hw/hexagon/virt.c b/hw/hexagon/virt.c
new file mode 100644
index 0000000000..a2e4cc8c6c
--- /dev/null
+++ b/hw/hexagon/virt.c
@@ -0,0 +1,395 @@
+/*
+ * Hexagon virt emulation
+ *
+ * Copyright (c) 2024-2025 Qualcomm Innovation Center, Inc. All Rights
Reserved.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "exec/address-spaces.h"
+#include "hw/char/pl011.h"
+#include "hw/core/sysbus-fdt.h"
+#include "hw/hexagon/hexagon.h"
+#include "hw/hexagon/virt.h"
+#include "hw/loader.h"
+#include "hw/qdev-properties.h"
+#include "hw/register.h"
+#include "qemu/error-report.h"
+#include "qemu/guest-random.h"
+#include "qemu/units.h"
+#include "elf.h"
+#include "machine_cfg_v68n_1024.h.inc"
+#include "system/device_tree.h"
+#include "system/reset.h"
+#include "system/system.h"
+#include <libfdt.h>
+
+static const int VIRTIO_DEV_COUNT = 2;
+
+static const MemMapEntry base_memmap[] = {
+ [VIRT_UART0] = { 0x10000000, 0x00000200 },
+ [VIRT_MMIO] = { 0x11000000, 0x1000000, },
+ [VIRT_GPT] = { 0xab000000, 0x00001000 },
+ [VIRT_FDT] = { 0x99900000, 0x00000200 },
+};
+
+static const int irqmap[] = {
+ [VIRT_MMIO] = 18, /* ...to 18 + VIRTIO_DEV_COUNT - 1 */
+ [VIRT_GPT] = 12,
+ [VIRT_UART0] = 15,
+ [VIRT_QTMR0] = 2,
+ [VIRT_QTMR1] = 4,
+};
+
+
+static void create_fdt(HexagonVirtMachineState *vms)
+{
+ MachineState *ms = MACHINE(vms);
+ void *fdt = create_device_tree(&vms->fdt_size);
+
+ if (!fdt) {
+ error_report("create_device_tree() failed");
+ exit(1);
+ }
+
+ ms->fdt = fdt;
+
+ qemu_fdt_setprop_string(fdt, "/", "compatible", "linux,hexagon-virt");
+ qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
+ qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x1);
+ qemu_fdt_setprop_string(fdt, "/", "model", "linux,hexagon-virt");
+
+ qemu_fdt_setprop_string(fdt, "/", "model", "hexagon-virt,qemu");
+ qemu_fdt_setprop_string(fdt, "/", "compatible", "qcom,sm8150");
+
+ qemu_fdt_add_subnode(fdt, "/soc");
+ qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
+ qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x1);
+ qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
+
+ qemu_fdt_add_subnode(fdt, "/chosen");
+
+ uint8_t rng_seed[32];
+ qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
+ qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed));
+}
+
+static void fdt_add_hvx(HexagonVirtMachineState *vms,
+ const hexagon_machine_config *m_cfg, Error **errp)
+{
+ const MachineState *ms = MACHINE(vms);
+ uint32_t vtcm_size_bytes = m_cfg->cfgtable.vtcm_size_kb * 1024;
+ if (vtcm_size_bytes > 0) {
+ memory_region_init_ram(&vms->vtcm, NULL, "vtcm.ram", vtcm_size_bytes,
+ errp);
+ memory_region_add_subregion(vms->sys, m_cfg->cfgtable.vtcm_base << 16,
+ &vms->vtcm);
+
+ qemu_fdt_add_subnode(ms->fdt, "/soc/vtcm");
+ qemu_fdt_setprop_string(ms->fdt, "/soc/vtcm", "compatible",
+ "qcom,hexagon_vtcm");
+
+ assert(sizeof(m_cfg->cfgtable.vtcm_base) == sizeof(uint32_t));
+ qemu_fdt_setprop_cells(ms->fdt, "/soc/vtcm", "reg", 0,
+ m_cfg->cfgtable.vtcm_base << 16,
+ vtcm_size_bytes);
+ }
+
+ if (m_cfg->cfgtable.ext_contexts > 0) {
+ qemu_fdt_add_subnode(ms->fdt, "/soc/hvx");
+ qemu_fdt_setprop_string(ms->fdt, "/soc/hvx", "compatible",
+ "qcom,hexagon-hvx");
+ qemu_fdt_setprop_cells(ms->fdt, "/soc/hvx", "qcom,hvx-max-ctxts",
+ m_cfg->cfgtable.ext_contexts);
+ qemu_fdt_setprop_cells(ms->fdt, "/soc/hvx", "qcom,hvx-vlength",
+ m_cfg->cfgtable.hvx_vec_log_length);
+ }
+}
+
+static int32_t irq_hvm_ic_phandle = -1;
+static void fdt_add_hvm_pic_node(HexagonVirtMachineState *vms,
+ const hexagon_machine_config *m_cfg)
+{
+ MachineState *ms = MACHINE(vms);
+ irq_hvm_ic_phandle = qemu_fdt_alloc_phandle(ms->fdt);
+
+ qemu_fdt_setprop_cell(ms->fdt, "/soc", "interrupt-parent",
+ irq_hvm_ic_phandle);
+
+ qemu_fdt_add_subnode(ms->fdt, "/soc/interrupt-controller");
+ qemu_fdt_setprop_cell(ms->fdt, "/soc/interrupt-controller",
+ "#address-cells", 2);
+ qemu_fdt_setprop_cell(ms->fdt, "/soc/interrupt-controller",
+ "#interrupt-cells", 2);
+ qemu_fdt_setprop_string(ms->fdt, "/soc/interrupt-controller", "compatible",
+ "qcom,h2-pic,hvm-pic");
+ qemu_fdt_setprop(ms->fdt, "/soc/interrupt-controller",
+ "interrupt-controller", NULL, 0);
+ qemu_fdt_setprop_cell(ms->fdt, "/soc/interrupt-controller", "phandle",
+ irq_hvm_ic_phandle);
+
+ sysbus_mmio_map(SYS_BUS_DEVICE(vms->l2vic), 1,
+ m_cfg->cfgtable.fastl2vic_base << 16);
+}
+
+
+static void fdt_add_gpt_node(HexagonVirtMachineState *vms)
+{
+ g_autofree char *name = NULL;
+ MachineState *ms = MACHINE(vms);
+
+ name = g_strdup_printf("/soc/gpt@%" PRIx64,
+ (int64_t)base_memmap[VIRT_GPT].base);
+ qemu_fdt_add_subnode(ms->fdt, name);
+ qemu_fdt_setprop_string(ms->fdt, name, "compatible",
+ "qcom,h2-timer,hvm-timer");
+ qemu_fdt_setprop_cells(ms->fdt, name, "interrupts", irqmap[VIRT_GPT], 0);
+ qemu_fdt_setprop_cells(ms->fdt, name, "reg", 0x0,
+ base_memmap[VIRT_GPT].base,
+ base_memmap[VIRT_GPT].size);
+}
+
+static int32_t clock_phandle = -1;
+static void fdt_add_clocks(const HexagonVirtMachineState *vms)
+{
+ MachineState *ms = MACHINE(vms);
+ clock_phandle = qemu_fdt_alloc_phandle(ms->fdt);
+ qemu_fdt_add_subnode(ms->fdt, "/apb-pclk");
+ qemu_fdt_setprop_string(ms->fdt, "/apb-pclk", "compatible", "fixed-clock");
+ qemu_fdt_setprop_cell(ms->fdt, "/apb-pclk", "#clock-cells", 0x0);
+ qemu_fdt_setprop_cell(ms->fdt, "/apb-pclk", "clock-frequency", 24000000);
+ qemu_fdt_setprop_string(ms->fdt, "/apb-pclk", "clock-output-names",
+ "clk24mhz");
+ qemu_fdt_setprop_cell(ms->fdt, "/apb-pclk", "phandle", clock_phandle);
+}
+
+static void fdt_add_uart(const HexagonVirtMachineState *vms, int uart)
+{
+ char *nodename;
+ hwaddr base = base_memmap[uart].base;
+ hwaddr size = base_memmap[uart].size;
+ assert(uart == 0);
+ int irq = irqmap[VIRT_UART0 + uart];
+ const char compat[] = "arm,pl011\0arm,primecell";
+ const char clocknames[] = "uartclk\0apb_pclk";
+ MachineState *ms = MACHINE(vms);
+
+ pl011_create(base, qdev_get_gpio_in(vms->l2vic, irq), serial_hd(0));
+
+ nodename = g_strdup_printf("/pl011@%" PRIx64, base);
+ qemu_fdt_add_subnode(ms->fdt, nodename);
+
+ /* Note that we can't use setprop_string because of the embedded NUL */
+ qemu_fdt_setprop(ms->fdt, nodename, "compatible", compat, sizeof(compat));
+ qemu_fdt_setprop_cells(ms->fdt, nodename, "reg", 0, base, size);
+ qemu_fdt_setprop_cells(ms->fdt, nodename, "interrupts", 32 + irq, 0);
+ qemu_fdt_setprop_cells(ms->fdt, nodename, "clocks", clock_phandle,
+ clock_phandle);
+ qemu_fdt_setprop(ms->fdt, nodename, "clock-names", clocknames,
+ sizeof(clocknames));
+ qemu_fdt_setprop_cell(ms->fdt, nodename, "interrupt-parent",
+ irq_hvm_ic_phandle);
+
+ qemu_fdt_setprop_string(ms->fdt, "/chosen", "stdout-path", nodename);
+ qemu_fdt_add_subnode(ms->fdt, "/aliases");
+ qemu_fdt_setprop_string(ms->fdt, "/aliases", "serial0", nodename);
+
+ g_free(nodename);
+}
+
+static void fdt_add_cpu_nodes(const HexagonVirtMachineState *vms)
+{
+ MachineState *ms = MACHINE(vms);
+ qemu_fdt_add_subnode(ms->fdt, "/cpus");
+ qemu_fdt_setprop_cell(ms->fdt, "/cpus", "#address-cells", 0x1);
+ qemu_fdt_setprop_cell(ms->fdt, "/cpus", "#size-cells", 0x0);
+
+ /* cpu nodes */
+ for (int num = ms->smp.cpus - 1; num >= 0; num--) {
+ char *nodename = g_strdup_printf("/cpus/cpu@%d", num);
+ qemu_fdt_add_subnode(ms->fdt, nodename);
+ qemu_fdt_setprop_string(ms->fdt, nodename, "device_type", "cpu");
+ qemu_fdt_setprop_cell(ms->fdt, nodename, "reg", num);
+ qemu_fdt_setprop_cell(ms->fdt, nodename, "phandle",
+ qemu_fdt_alloc_phandle(ms->fdt));
+ g_free(nodename);
+ }
+}
+
+
+static void fdt_add_virtio_devices(const HexagonVirtMachineState *vms)
+{
+ MachineState *ms = MACHINE(vms);
+ /* VirtIO MMIO devices */
+ for (int i = 0; i < VIRTIO_DEV_COUNT; i++) {
+ char *nodename;
+ int irq = irqmap[VIRT_MMIO] + i;
+ size_t size = base_memmap[VIRT_MMIO].size;
+ hwaddr base = base_memmap[VIRT_MMIO].base + i * size;
+
+ nodename = g_strdup_printf("/virtio_mmio@%" PRIx64, base);
+ qemu_fdt_add_subnode(ms->fdt, nodename);
+ qemu_fdt_setprop_string(ms->fdt, nodename, "compatible",
"virtio,mmio");
+ qemu_fdt_setprop_sized_cells(ms->fdt, nodename, "reg", 2, base, 1,
+ size);
+ qemu_fdt_setprop_cells(ms->fdt, nodename, "interrupts", irq, 0);
+ qemu_fdt_setprop_cell(ms->fdt, nodename, "interrupt-parent",
+ irq_hvm_ic_phandle);
+
+ sysbus_create_simple(
+ "virtio-mmio", base,
+ qdev_get_gpio_in(vms->l2vic, irqmap[VIRT_MMIO] + i));
+
+ g_free(nodename);
+ }
+}
+
+static void virt_instance_init(Object *obj)
+{
+ HexagonVirtMachineState *vms = HEXAGON_VIRT_MACHINE(obj);
+
+ create_fdt(vms);
+}
+
+void hexagon_load_fdt(const HexagonVirtMachineState *vms)
+{
+ MachineState *ms = MACHINE(vms);
+ hwaddr fdt_addr = base_memmap[VIRT_FDT].base;
+ uint32_t fdtsize = vms->fdt_size;
+
+ /* copy in the device tree */
+ qemu_fdt_dumpdtb(ms->fdt, fdtsize);
+
+ rom_add_blob_fixed_as("fdt", ms->fdt, fdtsize, fdt_addr,
+ &address_space_memory);
+ qemu_register_reset_nosnapshotload(
+ qemu_fdt_randomize_seeds,
+ rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize));
+}
+
+static uint64_t load_kernel(const HexagonVirtMachineState *vms)
+{
+ MachineState *ms = MACHINE(vms);
+ uint64_t entry = 0;
+ if (load_elf_ram_sym(ms->kernel_filename, NULL, NULL, NULL, NULL, &entry,
+ NULL, NULL, 0, EM_HEXAGON, 0, 0,
&address_space_memory,
+ false, NULL) > 0) {
+ return entry;
+ }
+ error_report("error loading '%s'", ms->kernel_filename);
+ exit(1);
+}
+
+static void do_cpu_reset(void *opaque)
+{
+ HexagonCPU *cpu = opaque;
+ CPUState *cs = CPU(cpu);
+ cpu_reset(cs);
+}
+
+static void virt_init(MachineState *ms)
+{
+ HexagonVirtMachineState *vms = HEXAGON_VIRT_MACHINE(ms);
+ Error **errp = NULL;
+ const hexagon_machine_config *m_cfg = &v68n_1024;
+
+ qemu_fdt_setprop_string(ms->fdt, "/chosen", "bootargs",
ms->kernel_cmdline);
+
+ vms->sys = get_system_memory();
+
+ memory_region_init_ram(&vms->ram, NULL, "ddr.ram", ms->ram_size, errp);
+ memory_region_add_subregion(vms->sys, 0x0, &vms->ram);
+
+ if (m_cfg->l2tcm_size) {
+ memory_region_init_ram(&vms->tcm, NULL, "tcm.ram", m_cfg->l2tcm_size,
+ errp);
+ memory_region_add_subregion(vms->sys, m_cfg->cfgtable.l2tcm_base << 16,
+ &vms->tcm);
+ }
+
+ memory_region_init_rom(&vms->cfgtable, NULL, "config_table.rom",
+ sizeof(m_cfg->cfgtable), errp);
+ memory_region_add_subregion(vms->sys, m_cfg->cfgbase, &vms->cfgtable);
+ fdt_add_hvx(vms, m_cfg, errp);
+ const char *cpu_model = ms->cpu_type;
+
+ if (!cpu_model) {
+ cpu_model = HEXAGON_CPU_TYPE_NAME("v73");
+ }
+
+ HexagonCPU *cpu_0 = NULL;
+ for (int i = 0; i < ms->smp.cpus; i++) {
+ HexagonCPU *cpu = HEXAGON_CPU(object_new(ms->cpu_type));
+ qemu_register_reset(do_cpu_reset, cpu);
+
+ if (i == 0) {
+ cpu_0 = cpu;
+ if (ms->kernel_filename) {
+ uint64_t entry = load_kernel(vms);
+
+ qdev_prop_set_uint32(DEVICE(cpu_0), "exec-start-addr", entry);
+ }
+ }
+ qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", (i != 0));
+ qdev_prop_set_uint32(DEVICE(cpu), "hvx-contexts",
+ m_cfg->cfgtable.ext_contexts);
+ qdev_prop_set_uint32(DEVICE(cpu), "config-table-addr", m_cfg->cfgbase);
+ qdev_prop_set_uint32(DEVICE(cpu), "l2vic-base-addr",
m_cfg->l2vic_base);
+ qdev_prop_set_uint32(DEVICE(cpu), "jtlb-entries",
+ m_cfg->cfgtable.jtlb_size_entries);
+
+ if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) {
+ return;
+ }
+ }
+ vms->l2vic = sysbus_create_varargs(
+ "l2vic", m_cfg->l2vic_base, qdev_get_gpio_in(DEVICE(cpu_0), 0),
+ qdev_get_gpio_in(DEVICE(cpu_0), 1), qdev_get_gpio_in(DEVICE(cpu_0), 2),
+ qdev_get_gpio_in(DEVICE(cpu_0), 3), qdev_get_gpio_in(DEVICE(cpu_0), 4),
+ qdev_get_gpio_in(DEVICE(cpu_0), 5), qdev_get_gpio_in(DEVICE(cpu_0), 6),
+ qdev_get_gpio_in(DEVICE(cpu_0), 7), NULL);
+
+ fdt_add_hvm_pic_node(vms, m_cfg);
+ fdt_add_virtio_devices(vms);
+ fdt_add_cpu_nodes(vms);
+ fdt_add_clocks(vms);
+ fdt_add_uart(vms, VIRT_UART0);
+ fdt_add_gpt_node(vms);
+
+ rom_add_blob_fixed_as("config_table.rom", &m_cfg->cfgtable,
+ sizeof(m_cfg->cfgtable), m_cfg->cfgbase,
+ &address_space_memory);
+
+
+ hexagon_load_fdt(vms);
+}
+
+
+static void virt_class_init(ObjectClass *oc, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+
+ mc->init = virt_init;
+ mc->default_cpu_type = HEXAGON_CPU_TYPE_NAME("v73");
+ mc->default_ram_size = 4 * GiB;
+ mc->max_cpus = 8;
+ mc->default_cpus = 8;
+ mc->is_default = false;
+ mc->default_kernel_irqchip_split = false;
+ mc->block_default_type = IF_VIRTIO;
+ mc->default_boot_order = NULL;
+ mc->no_cdrom = 1;
+ mc->numa_mem_supported = false;
+ mc->default_nic = "virtio-mmio-bus";
+}
+
+
+static const TypeInfo virt_machine_types[] = { {
+ .name = TYPE_HEXAGON_VIRT_MACHINE,
+ .parent = TYPE_MACHINE,
+ .instance_size = sizeof(HexagonVirtMachineState),
+ .class_init = virt_class_init,
+ .instance_init = virt_instance_init,
+} };
+
+DEFINE_TYPES(virt_machine_types)
diff --git a/target/hexagon/cpu.c b/target/hexagon/cpu.c
index 34940e9a84..7f8f716d6d 100644
--- a/target/hexagon/cpu.c
+++ b/target/hexagon/cpu.c
@@ -1,5 +1,5 @@
/*
- * Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights
Reserved.
+ * Copyright(c) 2019-2025 Qualcomm Innovation Center, Inc. All Rights
Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
diff --git a/hw/hexagon/Kconfig b/hw/hexagon/Kconfig
index 3fc14756e6..f3f0115731 100644
--- a/hw/hexagon/Kconfig
+++ b/hw/hexagon/Kconfig
@@ -4,3 +4,11 @@ config HEX_DSP
depends on HEXAGON && TCG
imply PTIMER
select L2VIC # Vector PIC
+
+config HEX_VIRT
+ bool
+ default y
+ depends on HEX_DSP && FDT
+ select DEVICE_TREE
+ select VIRTIO_MMIO
+ select PL011
diff --git a/hw/hexagon/meson.build b/hw/hexagon/meson.build
index 2ef3dbcd34..649ad6dc02 100644
--- a/hw/hexagon/meson.build
+++ b/hw/hexagon/meson.build
@@ -3,3 +3,5 @@ hexagon_ss.add(when: 'CONFIG_HEX_DSP', if_true:
files('hexagon_dsp.c',))
hw_arch += {'hexagon': hexagon_ss}
+hexagon_ss.add(when: 'CONFIG_HEX_VIRT', if_true: files('virt.c',))
+
--
2.34.1
