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-rw-r--r--hw/intc/Kconfig3
-rw-r--r--hw/intc/loongarch_ipi.c242
-rw-r--r--hw/intc/meson.build1
-rw-r--r--hw/intc/trace-events4
4 files changed, 250 insertions, 0 deletions
diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig
index eded1b557e..1122c33cec 100644
--- a/hw/intc/Kconfig
+++ b/hw/intc/Kconfig
@@ -87,3 +87,6 @@ config M68K_IRQC
config NIOS2_VIC
bool
+
+config LOONGARCH_IPI
+ bool
diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
new file mode 100644
index 0000000000..66bee93675
--- /dev/null
+++ b/hw/intc/loongarch_ipi.c
@@ -0,0 +1,242 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch ipi interrupt support
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "hw/intc/loongarch_ipi.h"
+#include "hw/irq.h"
+#include "qapi/error.h"
+#include "qemu/log.h"
+#include "exec/address-spaces.h"
+#include "hw/loongarch/virt.h"
+#include "migration/vmstate.h"
+#include "target/loongarch/internals.h"
+#include "trace.h"
+
+static uint64_t loongarch_ipi_readl(void *opaque, hwaddr addr, unsigned size)
+{
+ IPICore *s = opaque;
+ uint64_t ret = 0;
+ int index = 0;
+
+ addr &= 0xff;
+ switch (addr) {
+ case CORE_STATUS_OFF:
+ ret = s->status;
+ break;
+ case CORE_EN_OFF:
+ ret = s->en;
+ break;
+ case CORE_SET_OFF:
+ ret = 0;
+ break;
+ case CORE_CLEAR_OFF:
+ ret = 0;
+ break;
+ case CORE_BUF_20 ... CORE_BUF_38 + 4:
+ index = (addr - CORE_BUF_20) >> 2;
+ ret = s->buf[index];
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "invalid read: %x", (uint32_t)addr);
+ break;
+ }
+
+ trace_loongarch_ipi_read(size, (uint64_t)addr, ret);
+ return ret;
+}
+
+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 ipi_send(uint64_t val)
+{
+ int cpuid, data;
+ CPULoongArchState *env;
+
+ cpuid = (val >> 16) & 0x3ff;
+ /* IPI status vector */
+ data = 1 << (val & 0x1f);
+ qemu_mutex_lock_iothread();
+ CPUState *cs = qemu_get_cpu(cpuid);
+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);
+ env = &cpu->env;
+ 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 mail_send(uint64_t val)
+{
+ int cpuid, data;
+ hwaddr addr;
+ CPULoongArchState *env;
+
+ cpuid = (val >> 16) & 0x3ff;
+ addr = 0x1020 + (val & 0x1c);
+ CPUState *cs = qemu_get_cpu(cpuid);
+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);
+ env = &cpu->env;
+ data = get_ipi_data(val);
+ address_space_stl(&env->address_space_iocsr, addr,
+ data, MEMTXATTRS_UNSPECIFIED, NULL);
+}
+
+static void any_send(uint64_t val)
+{
+ int cpuid, data;
+ hwaddr addr;
+ CPULoongArchState *env;
+
+ cpuid = (val >> 16) & 0x3ff;
+ addr = val & 0xffff;
+ CPUState *cs = qemu_get_cpu(cpuid);
+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);
+ env = &cpu->env;
+ data = get_ipi_data(val);
+ address_space_stl(&env->address_space_iocsr, addr,
+ data, MEMTXATTRS_UNSPECIFIED, NULL);
+}
+
+static void loongarch_ipi_writel(void *opaque, hwaddr addr, uint64_t val,
+ unsigned size)
+{
+ IPICore *s = opaque;
+ int index = 0;
+
+ addr &= 0xff;
+ trace_loongarch_ipi_write(size, (uint64_t)addr, val);
+ switch (addr) {
+ case CORE_STATUS_OFF:
+ qemu_log_mask(LOG_GUEST_ERROR, "can not be written");
+ break;
+ case CORE_EN_OFF:
+ s->en = val;
+ break;
+ case CORE_SET_OFF:
+ s->status |= val;
+ if (s->status != 0 && (s->status & s->en) != 0) {
+ qemu_irq_raise(s->irq);
+ }
+ break;
+ case CORE_CLEAR_OFF:
+ s->status &= ~val;
+ if (s->status == 0 && s->en != 0) {
+ qemu_irq_lower(s->irq);
+ }
+ break;
+ case CORE_BUF_20 ... CORE_BUF_38 + 4:
+ index = (addr - CORE_BUF_20) >> 2;
+ s->buf[index] = val;
+ break;
+ case IOCSR_IPI_SEND:
+ ipi_send(val);
+ break;
+ case IOCSR_MAIL_SEND:
+ mail_send(val);
+ break;
+ case IOCSR_ANY_SEND:
+ any_send(val);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "invalid write: %x", (uint32_t)addr);
+ break;
+ }
+}
+
+static const MemoryRegionOps loongarch_ipi_ops = {
+ .read = loongarch_ipi_readl,
+ .write = loongarch_ipi_writel,
+ .impl.min_access_size = 4,
+ .impl.max_access_size = 4,
+ .valid.min_access_size = 4,
+ .valid.max_access_size = 8,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void loongarch_ipi_init(Object *obj)
+{
+ int cpu;
+ LoongArchMachineState *lams;
+ LoongArchIPI *s = LOONGARCH_IPI(obj);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+ Object *machine = qdev_get_machine();
+ ObjectClass *mc = object_get_class(machine);
+ /* 'lams' should be initialized */
+ if (!strcmp(MACHINE_CLASS(mc)->name, "none")) {
+ return;
+ }
+ lams = LOONGARCH_MACHINE(machine);
+ for (cpu = 0; cpu < MAX_IPI_CORE_NUM; cpu++) {
+ memory_region_init_io(&s->ipi_iocsr_mem[cpu], obj, &loongarch_ipi_ops,
+ &lams->ipi_core[cpu], "loongarch_ipi_iocsr", 0x100);
+ sysbus_init_mmio(sbd, &s->ipi_iocsr_mem[cpu]);
+ qdev_init_gpio_out(DEVICE(obj), &lams->ipi_core[cpu].irq, 1);
+ }
+}
+
+static const VMStateDescription vmstate_ipi_core = {
+ .name = "ipi-single",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(status, IPICore),
+ VMSTATE_UINT32(en, IPICore),
+ VMSTATE_UINT32(set, IPICore),
+ VMSTATE_UINT32(clear, IPICore),
+ VMSTATE_UINT32_ARRAY(buf, IPICore, MAX_IPI_MBX_NUM * 2),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_loongarch_ipi = {
+ .name = TYPE_LOONGARCH_IPI,
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT_ARRAY(ipi_core, LoongArchMachineState,
+ MAX_IPI_CORE_NUM, 0,
+ vmstate_ipi_core, IPICore),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->vmsd = &vmstate_loongarch_ipi;
+}
+
+static const TypeInfo loongarch_ipi_info = {
+ .name = TYPE_LOONGARCH_IPI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(LoongArchIPI),
+ .instance_init = loongarch_ipi_init,
+ .class_init = loongarch_ipi_class_init,
+};
+
+static void loongarch_ipi_register_types(void)
+{
+ type_register_static(&loongarch_ipi_info);
+}
+
+type_init(loongarch_ipi_register_types)
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 8b35139f82..57af7fb33f 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -63,3 +63,4 @@ specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XIVE'],
specific_ss.add(when: 'CONFIG_GOLDFISH_PIC', if_true: files('goldfish_pic.c'))
specific_ss.add(when: 'CONFIG_M68K_IRQC', if_true: files('m68k_irqc.c'))
specific_ss.add(when: 'CONFIG_NIOS2_VIC', if_true: files('nios2_vic.c'))
+specific_ss.add(when: 'CONFIG_LOONGARCH_IPI', if_true: files('loongarch_ipi.c'))
diff --git a/hw/intc/trace-events b/hw/intc/trace-events
index 5271590304..36774662af 100644
--- a/hw/intc/trace-events
+++ b/hw/intc/trace-events
@@ -287,3 +287,7 @@ sh_intc_register(const char *s, int id, unsigned short v, int c, int m) "%s %u -
sh_intc_read(unsigned size, uint64_t offset, unsigned long val) "size %u 0x%" PRIx64 " -> 0x%lx"
sh_intc_write(unsigned size, uint64_t offset, unsigned long val) "size %u 0x%" PRIx64 " <- 0x%lx"
sh_intc_set(int id, int enable) "setting interrupt group %d to %d"
+
+# loongarch_ipi.c
+loongarch_ipi_read(unsigned size, uint64_t addr, uint64_t val) "size: %u addr: 0x%"PRIx64 "val: 0x%"PRIx64
+loongarch_ipi_write(unsigned size, uint64_t addr, uint64_t val) "size: %u addr: 0x%"PRIx64 "val: 0x%"PRIx64
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-28 22:21:00 +0000