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-rw-r--r--MAINTAINERS2
-rw-r--r--default-configs/arm-softmmu.mak1
-rw-r--r--hw/misc/Makefile.objs1
-rw-r--r--hw/misc/armsse-mhu.c198
-rw-r--r--hw/misc/trace-events4
-rw-r--r--include/hw/misc/armsse-mhu.h44
6 files changed, 250 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 8f9f9d7..0a6190e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -633,6 +633,8 @@ F: hw/misc/iotkit-sysinfo.c
F: include/hw/misc/iotkit-sysinfo.h
F: hw/misc/armsse-cpuid.c
F: include/hw/misc/armsse-cpuid.h
+F: hw/misc/armsse-mhu.c
+F: include/hw/misc/armsse-mhu.h
Musca
M: Peter Maydell <peter.maydell@linaro.org>
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 87ad267..bd6943b 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -119,6 +119,7 @@ CONFIG_IOTKIT_SECCTL=y
CONFIG_IOTKIT_SYSCTL=y
CONFIG_IOTKIT_SYSINFO=y
CONFIG_ARMSSE_CPUID=y
+CONFIG_ARMSSE_MHU=y
CONFIG_VERSATILE=y
CONFIG_VERSATILE_PCI=y
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 74c91d2..c71e07a 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -70,6 +70,7 @@ obj-$(CONFIG_IOTKIT_SECCTL) += iotkit-secctl.o
obj-$(CONFIG_IOTKIT_SYSCTL) += iotkit-sysctl.o
obj-$(CONFIG_IOTKIT_SYSINFO) += iotkit-sysinfo.o
obj-$(CONFIG_ARMSSE_CPUID) += armsse-cpuid.o
+obj-$(CONFIG_ARMSSE_MHU) += armsse-mhu.o
obj-$(CONFIG_PVPANIC) += pvpanic.o
obj-$(CONFIG_AUX) += auxbus.o
diff --git a/hw/misc/armsse-mhu.c b/hw/misc/armsse-mhu.c
new file mode 100644
index 0000000..9ebca32
--- /dev/null
+++ b/hw/misc/armsse-mhu.c
@@ -0,0 +1,198 @@
+/*
+ * ARM SSE-200 Message Handling Unit (MHU)
+ *
+ * Copyright (c) 2019 Linaro Limited
+ * Written by Peter Maydell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+/*
+ * This is a model of the Message Handling Unit (MHU) which is part of the
+ * Arm SSE-200 and documented in
+ * http://infocenter.arm.com/help/topic/com.arm.doc.101104_0100_00_en/corelink_sse200_subsystem_for_embedded_technical_reference_manual_101104_0100_00_en.pdf
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "qapi/error.h"
+#include "sysemu/sysemu.h"
+#include "hw/sysbus.h"
+#include "hw/registerfields.h"
+#include "hw/misc/armsse-mhu.h"
+
+REG32(CPU0INTR_STAT, 0x0)
+REG32(CPU0INTR_SET, 0x4)
+REG32(CPU0INTR_CLR, 0x8)
+REG32(CPU1INTR_STAT, 0x10)
+REG32(CPU1INTR_SET, 0x14)
+REG32(CPU1INTR_CLR, 0x18)
+REG32(PID4, 0xfd0)
+REG32(PID5, 0xfd4)
+REG32(PID6, 0xfd8)
+REG32(PID7, 0xfdc)
+REG32(PID0, 0xfe0)
+REG32(PID1, 0xfe4)
+REG32(PID2, 0xfe8)
+REG32(PID3, 0xfec)
+REG32(CID0, 0xff0)
+REG32(CID1, 0xff4)
+REG32(CID2, 0xff8)
+REG32(CID3, 0xffc)
+
+/* Valid bits in the interrupt registers. If any are set the IRQ is raised */
+#define INTR_MASK 0xf
+
+/* PID/CID values */
+static const int armsse_mhu_id[] = {
+ 0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
+ 0x56, 0xb8, 0x0b, 0x00, /* PID0..PID3 */
+ 0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
+};
+
+static void armsse_mhu_update(ARMSSEMHU *s)
+{
+ qemu_set_irq(s->cpu0irq, s->cpu0intr != 0);
+ qemu_set_irq(s->cpu1irq, s->cpu1intr != 0);
+}
+
+static uint64_t armsse_mhu_read(void *opaque, hwaddr offset, unsigned size)
+{
+ ARMSSEMHU *s = ARMSSE_MHU(opaque);
+ uint64_t r;
+
+ switch (offset) {
+ case A_CPU0INTR_STAT:
+ r = s->cpu0intr;
+ break;
+
+ case A_CPU1INTR_STAT:
+ r = s->cpu1intr;
+ break;
+
+ case A_PID4 ... A_CID3:
+ r = armsse_mhu_id[(offset - A_PID4) / 4];
+ break;
+
+ case A_CPU0INTR_SET:
+ case A_CPU0INTR_CLR:
+ case A_CPU1INTR_SET:
+ case A_CPU1INTR_CLR:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "SSE MHU: read of write-only register at offset 0x%x\n",
+ (int)offset);
+ r = 0;
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "SSE MHU read: bad offset 0x%x\n", (int)offset);
+ r = 0;
+ break;
+ }
+ trace_armsse_mhu_read(offset, r, size);
+ return r;
+}
+
+static void armsse_mhu_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+ ARMSSEMHU *s = ARMSSE_MHU(opaque);
+
+ trace_armsse_mhu_write(offset, value, size);
+
+ switch (offset) {
+ case A_CPU0INTR_SET:
+ s->cpu0intr |= (value & INTR_MASK);
+ break;
+ case A_CPU0INTR_CLR:
+ s->cpu0intr &= ~(value & INTR_MASK);
+ break;
+ case A_CPU1INTR_SET:
+ s->cpu1intr |= (value & INTR_MASK);
+ break;
+ case A_CPU1INTR_CLR:
+ s->cpu1intr &= ~(value & INTR_MASK);
+ break;
+
+ case A_CPU0INTR_STAT:
+ case A_CPU1INTR_STAT:
+ case A_PID4 ... A_CID3:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "SSE MHU: write to read-only register at offset 0x%x\n",
+ (int)offset);
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "SSE MHU write: bad offset 0x%x\n", (int)offset);
+ break;
+ }
+
+ armsse_mhu_update(s);
+}
+
+static const MemoryRegionOps armsse_mhu_ops = {
+ .read = armsse_mhu_read,
+ .write = armsse_mhu_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid.min_access_size = 4,
+ .valid.max_access_size = 4,
+};
+
+static void armsse_mhu_reset(DeviceState *dev)
+{
+ ARMSSEMHU *s = ARMSSE_MHU(dev);
+
+ s->cpu0intr = 0;
+ s->cpu1intr = 0;
+}
+
+static const VMStateDescription armsse_mhu_vmstate = {
+ .name = "armsse-mhu",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(cpu0intr, ARMSSEMHU),
+ VMSTATE_UINT32(cpu1intr, ARMSSEMHU),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static void armsse_mhu_init(Object *obj)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+ ARMSSEMHU *s = ARMSSE_MHU(obj);
+
+ memory_region_init_io(&s->iomem, obj, &armsse_mhu_ops,
+ s, "armsse-mhu", 0x1000);
+ sysbus_init_mmio(sbd, &s->iomem);
+ sysbus_init_irq(sbd, &s->cpu0irq);
+ sysbus_init_irq(sbd, &s->cpu1irq);
+}
+
+static void armsse_mhu_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->reset = armsse_mhu_reset;
+ dc->vmsd = &armsse_mhu_vmstate;
+}
+
+static const TypeInfo armsse_mhu_info = {
+ .name = TYPE_ARMSSE_MHU,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(ARMSSEMHU),
+ .instance_init = armsse_mhu_init,
+ .class_init = armsse_mhu_class_init,
+};
+
+static void armsse_mhu_register_types(void)
+{
+ type_register_static(&armsse_mhu_info);
+}
+
+type_init(armsse_mhu_register_types);
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index b0701bd..c1795bb 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -136,3 +136,7 @@ iotkit_sysctl_reset(void) "IoTKit SysCtl: reset"
# hw/misc/armsse-cpuid.c
armsse_cpuid_read(uint64_t offset, uint64_t data, unsigned size) "SSE-200 CPU_IDENTITY read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
armsse_cpuid_write(uint64_t offset, uint64_t data, unsigned size) "SSE-200 CPU_IDENTITY write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+
+# hw/misc/armsse-mhu.c
+armsse_mhu_read(uint64_t offset, uint64_t data, unsigned size) "SSE-200 MHU read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+armsse_mhu_write(uint64_t offset, uint64_t data, unsigned size) "SSE-200 MHU write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
diff --git a/include/hw/misc/armsse-mhu.h b/include/hw/misc/armsse-mhu.h
new file mode 100644
index 0000000..e57eafc
--- /dev/null
+++ b/include/hw/misc/armsse-mhu.h
@@ -0,0 +1,44 @@
+/*
+ * ARM SSE-200 Message Handling Unit (MHU)
+ *
+ * Copyright (c) 2019 Linaro Limited
+ * Written by Peter Maydell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+/*
+ * This is a model of the Message Handling Unit (MHU) which is part of the
+ * Arm SSE-200 and documented in
+ * http://infocenter.arm.com/help/topic/com.arm.doc.101104_0100_00_en/corelink_sse200_subsystem_for_embedded_technical_reference_manual_101104_0100_00_en.pdf
+ *
+ * QEMU interface:
+ * + sysbus MMIO region 0: the system information register bank
+ * + sysbus IRQ 0: interrupt for CPU 0
+ * + sysbus IRQ 1: interrupt for CPU 1
+ */
+
+#ifndef HW_MISC_SSE_MHU_H
+#define HW_MISC_SSE_MHU_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_ARMSSE_MHU "armsse-mhu"
+#define ARMSSE_MHU(obj) OBJECT_CHECK(ARMSSEMHU, (obj), TYPE_ARMSSE_MHU)
+
+typedef struct ARMSSEMHU {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion iomem;
+ qemu_irq cpu0irq;
+ qemu_irq cpu1irq;
+
+ uint32_t cpu0intr;
+ uint32_t cpu1intr;
+} ARMSSEMHU;
+
+#endif
generated by cgit v1.1 at 2024-09-30 02:49:33 +0000