This patch realize the IPI interrupt controller.
Signed-off-by: Xiaojuan Yang <yangxiaoj...@loongson.cn>
Signed-off-by: Song Gao <gaos...@loongson.cn>
---
hw/loongarch/ipi.c | 144 +++++++++++++++++++++++++++++++
hw/loongarch/ls3a5000_virt.c | 1 +
hw/loongarch/meson.build | 2 +-
include/hw/loongarch/gipi.h | 37 ++++++++
include/hw/loongarch/loongarch.h | 4 +
target/loongarch/cpu.h | 1 +
6 files changed, 188 insertions(+), 1 deletion(-)
create mode 100644 hw/loongarch/ipi.c
create mode 100644 include/hw/loongarch/gipi.h
diff --git a/hw/loongarch/ipi.c b/hw/loongarch/ipi.c
new file mode 100644
index 0000000000..4902205ff5
--- /dev/null
+++ b/hw/loongarch/ipi.c
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch ipi interrupt support
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/units.h"
+#include "qapi/error.h"
+#include "exec/address-spaces.h"
+#include "hw/hw.h"
+#include "hw/irq.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/cpus.h"
+#include "cpu.h"
+#include "qemu/log.h"
+#include "hw/loongarch/loongarch.h"
+#include "migration/vmstate.h"
+
+static const VMStateDescription vmstate_gipi_core = {
+ .name = "gipi-single",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(status, gipi_core),
+ VMSTATE_UINT32(en, gipi_core),
+ VMSTATE_UINT32(set, gipi_core),
+ VMSTATE_UINT32(clear, gipi_core),
+ VMSTATE_UINT64_ARRAY(buf, gipi_core, MAX_GIPI_MBX_NUM),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_gipi = {
+ .name = "gipi",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT_ARRAY(core, gipiState, MAX_GIPI_CORE_NUM, 0,
+ vmstate_gipi_core, gipi_core),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void gipi_writel(void *opaque, hwaddr addr, uint64_t val, unsigned size)
+{
+ gipi_core *s = opaque;
+ void *pbuf;
+
+ if (size != 4) {
+ hw_error("size not 4");
+ }
+ addr &= 0xff;
+ switch (addr) {
+ case CORE_STATUS_OFF:
+ hw_error("CORE_SET_OFF Can't be write\n");
+ break;
+ case CORE_EN_OFF:
+ s->en = val;
+ break;
+ case CORE_SET_OFF:
+ s->status |= val;
+ if (s->status != 0) {
+ qemu_irq_raise(s->irq);
+ }
+ break;
+ case CORE_CLEAR_OFF:
+ s->status ^= val;
+ if (s->status == 0) {
+ qemu_irq_lower(s->irq);
+ }
+ break;
+ case CORE_BUF_20 ... CORE_BUF_38:
+ pbuf = (void *)s->buf + (addr - 0x20);
+ *(unsigned int *)pbuf = val;
+ break;
+ default:
+ break;
+ }
+}
+
+static uint64_t gipi_readl(void *opaque, hwaddr addr, unsigned size)
+{
+ gipi_core *s = opaque;
+ uint64_t ret = 0;
+ void *pbuf;
+
+ addr &= 0xff;
+ if (size != 4) {
+ hw_error("size not 4 %d\n", size);
+ }
+ 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:
+ pbuf = (void *)s->buf + (addr - 0x20);
+ ret = *(unsigned int *)pbuf;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const MemoryRegionOps gipi_ops = {
+ .read = gipi_readl,
+ .write = gipi_writel,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+int cpu_init_ipi(LoongArchMachineState *lams, qemu_irq parent, int cpu)
+{
+ int core_num = cpu % 4;
+ hwaddr addr;
+ MemoryRegion *region;
+ char str[32];
+
+ if (lams->gipi == NULL) {
+ lams->gipi = g_malloc0(sizeof(gipiState));
+ vmstate_register(NULL, 0, &vmstate_gipi, lams->gipi);
+ }
+
+ lams->gipi->core[cpu].irq = parent;
+
+ addr = SMP_GIPI_MAILBOX + core_num * 0x100;
+ region = g_new(MemoryRegion, 1);
+ sprintf(str, "gipi%d", cpu);
+ memory_region_init_io(region, NULL, &gipi_ops,
+ &lams->gipi->core[cpu], str, 0x100);
+ memory_region_add_subregion(lams->system_iocsr, addr, region);
+ return 0;
+}
diff --git a/hw/loongarch/ls3a5000_virt.c b/hw/loongarch/ls3a5000_virt.c
index 37d6b1ec88..bd79df96df 100644
--- a/hw/loongarch/ls3a5000_virt.c
+++ b/hw/loongarch/ls3a5000_virt.c
@@ -153,6 +153,7 @@ static void ls3a5000_virt_init(MachineState *machine)
/* Init CPU internal devices */
cpu_loongarch_init_irq(cpu);
cpu_loongarch_clock_init(cpu);
+ cpu_init_ipi(lams, env->irq[IRQ_IPI], i);
qemu_register_reset(main_cpu_reset, cpu);
}
diff --git a/hw/loongarch/meson.build b/hw/loongarch/meson.build
index a972210680..1bd209c9eb 100644
--- a/hw/loongarch/meson.build
+++ b/hw/loongarch/meson.build
@@ -1,5 +1,5 @@
loongarch_ss = ss.source_set()
loongarch_ss.add(files('loongarch_int.c'))
-loongarch_ss.add(when: 'CONFIG_LOONGSON_3A5000', if_true:
files('ls3a5000_virt.c'))
+loongarch_ss.add(when: 'CONFIG_LOONGSON_3A5000', if_true:
files('ls3a5000_virt.c', 'ipi.c'))
hw_arch += {'loongarch': loongarch_ss}
diff --git a/include/hw/loongarch/gipi.h b/include/hw/loongarch/gipi.h
new file mode 100644
index 0000000000..244d4e3ecf
--- /dev/null
+++ b/include/hw/loongarch/gipi.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch ipi interrupt header files
+ *
+ * Copyright (C) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef HW_LOONGARCH_GIPI_H
+#define HW_LOONGARCH_GIPI_H
+
+#define SMP_GIPI_MAILBOX 0x1000ULL
+#define CORE_STATUS_OFF 0x0
+#define CORE_EN_OFF 0x4
+#define CORE_SET_OFF 0x8
+#define CORE_CLEAR_OFF 0xc
+#define CORE_BUF_20 0x20
+#define CORE_BUF_28 0x28
+#define CORE_BUF_30 0x30
+#define CORE_BUF_38 0x38
+
+#define MAX_GIPI_CORE_NUM 4
+#define MAX_GIPI_MBX_NUM 4
+
+typedef struct gipi_core {
+ uint32_t status;
+ uint32_t en;
+ uint32_t set;
+ uint32_t clear;
+ uint64_t buf[MAX_GIPI_MBX_NUM];
+ qemu_irq irq;
+} gipi_core;
+
+typedef struct gipiState {
+ gipi_core core[MAX_GIPI_CORE_NUM];
+} gipiState;
+
+#endif
diff --git a/include/hw/loongarch/loongarch.h b/include/hw/loongarch/loongarch.h
index 8538697e5f..54cc875e6d 100644
--- a/include/hw/loongarch/loongarch.h
+++ b/include/hw/loongarch/loongarch.h
@@ -12,6 +12,7 @@
#include "qemu-common.h"
#include "hw/boards.h"
#include "qemu/queue.h"
+#include "hw/loongarch/gipi.h"
#define LOONGARCH_MAX_VCPUS 4
#define PM_MMIO_ADDR 0x10080000UL
@@ -38,6 +39,8 @@ typedef struct LoongArchMachineState {
AddressSpace *address_space_iocsr;
MemoryRegion *system_iocsr;
+
+ gipiState *gipi;
} LoongArchMachineState;
#define TYPE_LOONGARCH_MACHINE MACHINE_TYPE_NAME("loongson7a")
@@ -45,4 +48,5 @@ DECLARE_INSTANCE_CHECKER(LoongArchMachineState,
LOONGARCH_MACHINE,
TYPE_LOONGARCH_MACHINE)
void cpu_loongarch_init_irq(LoongArchCPU *cpu);
+int cpu_init_ipi(LoongArchMachineState *lams, qemu_irq irq, int cpu);
#endif
diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 77afe9e26a..b7ef0b8b3c 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -152,6 +152,7 @@ extern const char * const fregnames[];
#define N_IRQS 14
#define IRQ_TIMER 11
+#define IRQ_IPI 12
/*
* LoongArch cpu has 4 priv level, now only 2 mode used.
--
2.27.0
