summaryrefslogtreecommitdiffstats
path: root/hw/openrisc/openrisc_sim.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/openrisc/openrisc_sim.c')
-rw-r--r--hw/openrisc/openrisc_sim.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/hw/openrisc/openrisc_sim.c b/hw/openrisc/openrisc_sim.c
new file mode 100644
index 00000000..35da123a
--- /dev/null
+++ b/hw/openrisc/openrisc_sim.c
@@ -0,0 +1,371 @@
+/*
+ * OpenRISC simulator for use as an IIS.
+ *
+ * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ * Feng Gao <gf91597@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "hw/irq.h"
+#include "hw/boards.h"
+#include "hw/char/serial.h"
+#include "net/net.h"
+#include "hw/openrisc/boot.h"
+#include "hw/qdev-properties.h"
+#include "exec/address-spaces.h"
+#include "sysemu/device_tree.h"
+#include "sysemu/sysemu.h"
+#include "hw/sysbus.h"
+#include "sysemu/qtest.h"
+#include "sysemu/reset.h"
+#include "hw/core/split-irq.h"
+
+#include <libfdt.h>
+
+#define KERNEL_LOAD_ADDR 0x100
+
+#define OR1KSIM_CPUS_MAX 4
+#define OR1KSIM_CLK_MHZ 20000000
+
+#define TYPE_OR1KSIM_MACHINE MACHINE_TYPE_NAME("or1k-sim")
+#define OR1KSIM_MACHINE(obj) \
+ OBJECT_CHECK(Or1ksimState, (obj), TYPE_OR1KSIM_MACHINE)
+
+typedef struct Or1ksimState {
+ /*< private >*/
+ MachineState parent_obj;
+
+ /*< public >*/
+ void *fdt;
+ int fdt_size;
+
+} Or1ksimState;
+
+enum {
+ OR1KSIM_DRAM,
+ OR1KSIM_UART,
+ OR1KSIM_ETHOC,
+ OR1KSIM_OMPIC,
+};
+
+enum {
+ OR1KSIM_OMPIC_IRQ = 1,
+ OR1KSIM_UART_IRQ = 2,
+ OR1KSIM_ETHOC_IRQ = 4,
+};
+
+enum {
+ OR1KSIM_UART_COUNT = 4
+};
+
+static const struct MemmapEntry {
+ hwaddr base;
+ hwaddr size;
+} or1ksim_memmap[] = {
+ [OR1KSIM_DRAM] = { 0x00000000, 0 },
+ [OR1KSIM_UART] = { 0x90000000, 0x100 },
+ [OR1KSIM_ETHOC] = { 0x92000000, 0x800 },
+ [OR1KSIM_OMPIC] = { 0x98000000, OR1KSIM_CPUS_MAX * 8 },
+};
+
+static struct openrisc_boot_info {
+ uint32_t bootstrap_pc;
+ uint32_t fdt_addr;
+} boot_info;
+
+static void main_cpu_reset(void *opaque)
+{
+ OpenRISCCPU *cpu = opaque;
+ CPUState *cs = CPU(cpu);
+
+ cpu_reset(CPU(cpu));
+
+ cpu_set_pc(cs, boot_info.bootstrap_pc);
+ cpu_set_gpr(&cpu->env, 3, boot_info.fdt_addr);
+}
+
+static qemu_irq get_cpu_irq(OpenRISCCPU *cpus[], int cpunum, int irq_pin)
+{
+ return qdev_get_gpio_in_named(DEVICE(cpus[cpunum]), "IRQ", irq_pin);
+}
+
+static void openrisc_create_fdt(Or1ksimState *state,
+ const struct MemmapEntry *memmap,
+ int num_cpus, uint64_t mem_size,
+ const char *cmdline)
+{
+ void *fdt;
+ int cpu;
+ char *nodename;
+ int pic_ph;
+
+ fdt = state->fdt = create_device_tree(&state->fdt_size);
+ if (!fdt) {
+ error_report("create_device_tree() failed");
+ exit(1);
+ }
+
+ qemu_fdt_setprop_string(fdt, "/", "compatible", "opencores,or1ksim");
+ qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x1);
+ qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x1);
+
+ nodename = g_strdup_printf("/memory@%" HWADDR_PRIx,
+ memmap[OR1KSIM_DRAM].base);
+ qemu_fdt_add_subnode(fdt, nodename);
+ qemu_fdt_setprop_cells(fdt, nodename, "reg",
+ memmap[OR1KSIM_DRAM].base, mem_size);
+ qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
+ g_free(nodename);
+
+ qemu_fdt_add_subnode(fdt, "/cpus");
+ qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
+ qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
+
+ for (cpu = 0; cpu < num_cpus; cpu++) {
+ nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
+ qemu_fdt_add_subnode(fdt, nodename);
+ qemu_fdt_setprop_string(fdt, nodename, "compatible",
+ "opencores,or1200-rtlsvn481");
+ qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
+ qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency",
+ OR1KSIM_CLK_MHZ);
+ g_free(nodename);
+ }
+
+ nodename = (char *)"/pic";
+ qemu_fdt_add_subnode(fdt, nodename);
+ pic_ph = qemu_fdt_alloc_phandle(fdt);
+ qemu_fdt_setprop_string(fdt, nodename, "compatible",
+ "opencores,or1k-pic-level");
+ qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1);
+ qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0);
+ qemu_fdt_setprop_cell(fdt, nodename, "phandle", pic_ph);
+
+ qemu_fdt_setprop_cell(fdt, "/", "interrupt-parent", pic_ph);
+
+ qemu_fdt_add_subnode(fdt, "/chosen");
+ if (cmdline) {
+ qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
+ }
+
+ /* Create aliases node for use by devices. */
+ qemu_fdt_add_subnode(fdt, "/aliases");
+}
+
+static void openrisc_sim_net_init(Or1ksimState *state, hwaddr base, hwaddr size,
+ int num_cpus, OpenRISCCPU *cpus[],
+ int irq_pin, NICInfo *nd)
+{
+ void *fdt = state->fdt;
+ DeviceState *dev;
+ SysBusDevice *s;
+ char *nodename;
+ int i;
+
+ dev = qdev_new("open_eth");
+ qdev_set_nic_properties(dev, nd);
+
+ s = SYS_BUS_DEVICE(dev);
+ sysbus_realize_and_unref(s, &error_fatal);
+ if (num_cpus > 1) {
+ DeviceState *splitter = qdev_new(TYPE_SPLIT_IRQ);
+ qdev_prop_set_uint32(splitter, "num-lines", num_cpus);
+ qdev_realize_and_unref(splitter, NULL, &error_fatal);
+ for (i = 0; i < num_cpus; i++) {
+ qdev_connect_gpio_out(splitter, i, get_cpu_irq(cpus, i, irq_pin));
+ }
+ sysbus_connect_irq(s, 0, qdev_get_gpio_in(splitter, 0));
+ } else {
+ sysbus_connect_irq(s, 0, get_cpu_irq(cpus, 0, irq_pin));
+ }
+ sysbus_mmio_map(s, 0, base);
+ sysbus_mmio_map(s, 1, base + 0x400);
+
+ /* Init device tree node for ethoc. */
+ nodename = g_strdup_printf("/ethoc@%" HWADDR_PRIx, base);
+ qemu_fdt_add_subnode(fdt, nodename);
+ qemu_fdt_setprop_string(fdt, nodename, "compatible", "opencores,ethoc");
+ qemu_fdt_setprop_cells(fdt, nodename, "reg", base, size);
+ qemu_fdt_setprop_cell(fdt, nodename, "interrupts", irq_pin);
+ qemu_fdt_setprop(fdt, nodename, "big-endian", NULL, 0);
+
+ qemu_fdt_setprop_string(fdt, "/aliases", "enet0", nodename);
+ g_free(nodename);
+}
+
+static void openrisc_sim_ompic_init(Or1ksimState *state, hwaddr base,
+ hwaddr size, int num_cpus,
+ OpenRISCCPU *cpus[], int irq_pin)
+{
+ void *fdt = state->fdt;
+ DeviceState *dev;
+ SysBusDevice *s;
+ char *nodename;
+ int i;
+
+ dev = qdev_new("or1k-ompic");
+ qdev_prop_set_uint32(dev, "num-cpus", num_cpus);
+
+ s = SYS_BUS_DEVICE(dev);
+ sysbus_realize_and_unref(s, &error_fatal);
+ for (i = 0; i < num_cpus; i++) {
+ sysbus_connect_irq(s, i, get_cpu_irq(cpus, i, irq_pin));
+ }
+ sysbus_mmio_map(s, 0, base);
+
+ /* Add device tree node for ompic. */
+ nodename = g_strdup_printf("/ompic@%" HWADDR_PRIx, base);
+ qemu_fdt_add_subnode(fdt, nodename);
+ qemu_fdt_setprop_string(fdt, nodename, "compatible", "openrisc,ompic");
+ qemu_fdt_setprop_cells(fdt, nodename, "reg", base, size);
+ qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0);
+ qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 0);
+ qemu_fdt_setprop_cell(fdt, nodename, "interrupts", irq_pin);
+ g_free(nodename);
+}
+
+static void openrisc_sim_serial_init(Or1ksimState *state, hwaddr base,
+ hwaddr size, int num_cpus,
+ OpenRISCCPU *cpus[], int irq_pin,
+ int uart_idx)
+{
+ void *fdt = state->fdt;
+ char *nodename;
+ qemu_irq serial_irq;
+ char alias[sizeof("uart0")];
+ int i;
+
+ if (num_cpus > 1) {
+ DeviceState *splitter = qdev_new(TYPE_SPLIT_IRQ);
+ qdev_prop_set_uint32(splitter, "num-lines", num_cpus);
+ qdev_realize_and_unref(splitter, NULL, &error_fatal);
+ for (i = 0; i < num_cpus; i++) {
+ qdev_connect_gpio_out(splitter, i, get_cpu_irq(cpus, i, irq_pin));
+ }
+ serial_irq = qdev_get_gpio_in(splitter, 0);
+ } else {
+ serial_irq = get_cpu_irq(cpus, 0, irq_pin);
+ }
+ serial_mm_init(get_system_memory(), base, 0, serial_irq, 115200,
+ serial_hd(OR1KSIM_UART_COUNT - uart_idx - 1),
+ DEVICE_NATIVE_ENDIAN);
+
+ /* Add device tree node for serial. */
+ nodename = g_strdup_printf("/serial@%" HWADDR_PRIx, base);
+ qemu_fdt_add_subnode(fdt, nodename);
+ qemu_fdt_setprop_string(fdt, nodename, "compatible", "ns16550a");
+ qemu_fdt_setprop_cells(fdt, nodename, "reg", base, size);
+ qemu_fdt_setprop_cell(fdt, nodename, "interrupts", irq_pin);
+ qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", OR1KSIM_CLK_MHZ);
+ qemu_fdt_setprop(fdt, nodename, "big-endian", NULL, 0);
+
+ /* The /chosen node is created during fdt creation. */
+ qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", nodename);
+ snprintf(alias, sizeof(alias), "uart%d", uart_idx);
+ qemu_fdt_setprop_string(fdt, "/aliases", alias, nodename);
+ g_free(nodename);
+}
+
+static void openrisc_sim_init(MachineState *machine)
+{
+ ram_addr_t ram_size = machine->ram_size;
+ const char *kernel_filename = machine->kernel_filename;
+ OpenRISCCPU *cpus[OR1KSIM_CPUS_MAX] = {};
+ Or1ksimState *state = OR1KSIM_MACHINE(machine);
+ MemoryRegion *ram;
+ hwaddr load_addr;
+ int n;
+ unsigned int smp_cpus = machine->smp.cpus;
+
+ assert(smp_cpus >= 1 && smp_cpus <= OR1KSIM_CPUS_MAX);
+ for (n = 0; n < smp_cpus; n++) {
+ cpus[n] = OPENRISC_CPU(cpu_create(machine->cpu_type));
+ if (cpus[n] == NULL) {
+ fprintf(stderr, "Unable to find CPU definition!\n");
+ exit(1);
+ }
+
+ cpu_openrisc_clock_init(cpus[n]);
+
+ qemu_register_reset(main_cpu_reset, cpus[n]);
+ }
+
+ ram = g_malloc(sizeof(*ram));
+ memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal);
+ memory_region_add_subregion(get_system_memory(), 0, ram);
+
+ openrisc_create_fdt(state, or1ksim_memmap, smp_cpus, machine->ram_size,
+ machine->kernel_cmdline);
+
+ if (nd_table[0].used) {
+ openrisc_sim_net_init(state, or1ksim_memmap[OR1KSIM_ETHOC].base,
+ or1ksim_memmap[OR1KSIM_ETHOC].size,
+ smp_cpus, cpus,
+ OR1KSIM_ETHOC_IRQ, nd_table);
+ }
+
+ if (smp_cpus > 1) {
+ openrisc_sim_ompic_init(state, or1ksim_memmap[OR1KSIM_OMPIC].base,
+ or1ksim_memmap[OR1KSIM_OMPIC].size,
+ smp_cpus, cpus, OR1KSIM_OMPIC_IRQ);
+ }
+
+ for (n = 0; n < OR1KSIM_UART_COUNT; ++n)
+ openrisc_sim_serial_init(state, or1ksim_memmap[OR1KSIM_UART].base +
+ or1ksim_memmap[OR1KSIM_UART].size * n,
+ or1ksim_memmap[OR1KSIM_UART].size,
+ smp_cpus, cpus, OR1KSIM_UART_IRQ, n);
+
+ load_addr = openrisc_load_kernel(ram_size, kernel_filename,
+ &boot_info.bootstrap_pc);
+ if (load_addr > 0) {
+ if (machine->initrd_filename) {
+ load_addr = openrisc_load_initrd(state->fdt,
+ machine->initrd_filename,
+ load_addr, machine->ram_size);
+ }
+ boot_info.fdt_addr = openrisc_load_fdt(state->fdt, load_addr,
+ machine->ram_size);
+ }
+}
+
+static void openrisc_sim_machine_init(ObjectClass *oc, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+
+ mc->desc = "or1k simulation";
+ mc->init = openrisc_sim_init;
+ mc->max_cpus = OR1KSIM_CPUS_MAX;
+ mc->is_default = true;
+ mc->default_cpu_type = OPENRISC_CPU_TYPE_NAME("or1200");
+}
+
+static const TypeInfo or1ksim_machine_typeinfo = {
+ .name = TYPE_OR1KSIM_MACHINE,
+ .parent = TYPE_MACHINE,
+ .class_init = openrisc_sim_machine_init,
+ .instance_size = sizeof(Or1ksimState),
+};
+
+static void or1ksim_machine_init_register_types(void)
+{
+ type_register_static(&or1ksim_machine_typeinfo);
+}
+
+type_init(or1ksim_machine_init_register_types)
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-28 07:41:28 +0000