@@ -31,3 +31,4 @@ obj-$(CONFIG_XICS_KVM) += xics_kvm.o
obj-$(CONFIG_ALLWINNER_A10_PIC) += allwinner-a10-pic.o
obj-$(CONFIG_S390_FLIC) += s390_flic.o
obj-$(CONFIG_S390_FLIC_KVM) += s390_flic_kvm.o
+obj-$(CONFIG_ASPEED_SOC) += aspeed_vic.o
new file mode 100644
@@ -0,0 +1,339 @@
+/*
+ * ASPEED Interrupt Controller (New)
+ *
+ * Andrew Jeffery <andrew@aj.id.au>
+ *
+ * Copyright 2015, 2016 IBM Corp.
+ *
+ * This code is licensed under the GPL version 2 or later. See
+ * the COPYING file in the top-level directory.
+ */
+
+/* The hardware exposes two register sets, a legacy set and a 'new' set. The
+ * model implements the 'new' register set, and logs warnings on accesses to
+ * the legacy IO space.
+ *
+ * The hardware uses 32bit registers to manage 51 IRQs, with low and high
+ * registers for each conceptual register. The device model's implementation
+ * uses 64bit data types to store both low and high register values (in the one
+ * member), but must cope with access offset values in multiples of 4 passed to
+ * the callbacks. As such the read() and write() implementations process the
+ * provided offset to understand whether the access is requesting the lower or
+ * upper 32 bits of the 64bit member.
+ *
+ * Additionally, the "Interrupt Enable", "Edge Status" and "Software Interrupt"
+ * fields have separate "enable"/"status" and "clear" registers, where set bits
+ * are written to one or the other to change state (avoiding a
+ * read-modify-write sequence).
+ */
+
+#include "qemu/osdep.h"
+#include <inttypes.h>
+#include "hw/intc/aspeed_vic.h"
+#include "qemu/bitops.h"
+#include "trace.h"
+
+#define AVIC_NEW_BASE_OFFSET 0x80
+
+#define AVIC_L_MASK 0xFFFFFFFFU
+#define AVIC_H_MASK 0x0007FFFFU
+#define AVIC_EVENT_W_MASK (0x78000ULL << 32)
+
+static void aspeed_vic_update(AspeedVICState *s)
+{
+ uint64_t new = (s->raw & s->enable);
+ uint64_t flags;
+
+ flags = new & s->select;
+ trace_aspeed_vic_update_fiq(!!flags);
+ qemu_set_irq(s->fiq, !!flags);
+
+ flags = new & ~s->select;
+ trace_aspeed_vic_update_irq(!!flags);
+ qemu_set_irq(s->irq, !!flags);
+}
+
+static void aspeed_vic_set_irq(void *opaque, int irq, int level)
+{
+ uint64_t irq_mask;
+ bool raise;
+ AspeedVICState *s = (AspeedVICState *)opaque;
+
+ if (irq > ASPEED_VIC_NR_IRQS) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: Invalid interrupt number: %d\n",
+ __func__, irq);
+ return;
+ }
+
+ trace_aspeed_vic_set_irq(irq, level);
+
+ irq_mask = BIT(irq);
+ if (s->sense & irq_mask) {
+ /* level-triggered */
+ if (s->event & irq_mask) {
+ /* high-sensitive */
+ raise = level;
+ } else {
+ /* low-sensitive */
+ raise = !level;
+ }
+ s->raw = deposit64(s->raw, irq, 1, raise);
+ } else {
+ uint64_t old_level = s->level & irq_mask;
+
+ /* edge-triggered */
+ if (s->dual_edge & irq_mask) {
+ raise = (!!old_level) != (!!level);
+ } else {
+ if (s->event & irq_mask) {
+ /* rising-sensitive */
+ raise = !old_level && level;
+ } else {
+ /* falling-sensitive */
+ raise = old_level && !level;
+ }
+ }
+ if (raise) {
+ s->raw = deposit64(s->raw, irq, 1, raise);
+ }
+ }
+ s->level = deposit64(s->level, irq, 1, level);
+ aspeed_vic_update(s);
+}
+
+static uint64_t aspeed_vic_read(void *opaque, hwaddr offset, unsigned size)
+{
+ uint64_t val;
+ const bool high = !!(offset & 0x4);
+ hwaddr n_offset = (offset & ~0x4);
+ AspeedVICState *s = (AspeedVICState *)opaque;
+
+ if (offset < AVIC_NEW_BASE_OFFSET) {
+ qemu_log_mask(LOG_UNIMP, "%s: Ignoring read from legacy registers "
+ "at 0x%" HWADDR_PRIx "[%u]\n", __func__, offset, size);
+ return 0;
+ }
+
+ n_offset -= AVIC_NEW_BASE_OFFSET;
+
+ switch (n_offset) {
+ case 0x0: /* IRQ Status */
+ val = s->raw & ~s->select & s->enable;
+ break;
+ case 0x08: /* FIQ Status */
+ val = s->raw & s->select & s->enable;
+ break;
+ case 0x10: /* Raw Interrupt Status */
+ val = s->raw;
+ break;
+ case 0x18: /* Interrupt Selection */
+ val = s->select;
+ break;
+ case 0x20: /* Interrupt Enable */
+ val = s->enable;
+ break;
+ case 0x30: /* Software Interrupt */
+ val = s->trigger;
+ break;
+ case 0x40: /* Interrupt Sensitivity */
+ val = s->sense;
+ break;
+ case 0x48: /* Interrupt Both Edge Trigger Control */
+ val = s->dual_edge;
+ break;
+ case 0x50: /* Interrupt Event */
+ val = s->event;
+ break;
+ case 0x60: /* Edge Triggered Interrupt Status */
+ val = s->raw & ~s->sense;
+ break;
+ /* Illegal */
+ case 0x28: /* Interrupt Enable Clear */
+ case 0x38: /* Software Interrupt Clear */
+ case 0x58: /* Edge Triggered Interrupt Clear */
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Read of write-only register with offset 0x%"
+ HWADDR_PRIx "\n", __func__, offset);
+ val = 0;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Bad register at offset 0x%" HWADDR_PRIx "\n",
+ __func__, offset);
+ val = 0;
+ break;
+ }
+ if (high) {
+ val = extract64(val, 32, 19);
+ }
+ trace_aspeed_vic_read(offset, size, val);
+ return val;
+}
+
+static void aspeed_vic_write(void *opaque, hwaddr offset, uint64_t data,
+ unsigned size)
+{
+ const bool high = !!(offset & 0x4);
+ hwaddr n_offset = (offset & ~0x4);
+ AspeedVICState *s = (AspeedVICState *)opaque;
+
+ if (offset < AVIC_NEW_BASE_OFFSET) {
+ qemu_log_mask(LOG_UNIMP,
+ "%s: Ignoring write to legacy registers at 0x%"
+ HWADDR_PRIx "[%u] <- 0x%" PRIx64 "\n", __func__, offset,
+ size, data);
+ return;
+ }
+
+ n_offset -= AVIC_NEW_BASE_OFFSET;
+ trace_aspeed_vic_write(offset, size, data);
+
+ /* Given we have members using separate enable/clear registers, deposit64()
+ * isn't quite the tool for the job. Instead, relocate the incoming bits to
+ * the required bit offset based on the provided access address
+ */
+ if (high) {
+ data &= AVIC_H_MASK;
+ data <<= 32;
+ } else {
+ data &= AVIC_L_MASK;
+ }
+
+ switch (n_offset) {
+ case 0x18: /* Interrupt Selection */
+ /* Register has deposit64() semantics - overwrite requested 32 bits */
+ if (high) {
+ s->select &= AVIC_L_MASK;
+ } else {
+ s->select &= ((uint64_t) AVIC_H_MASK) << 32;
+ }
+ s->select |= data;
+ break;
+ case 0x20: /* Interrupt Enable */
+ s->enable |= data;
+ break;
+ case 0x28: /* Interrupt Enable Clear */
+ s->enable &= ~data;
+ break;
+ case 0x30: /* Software Interrupt */
+ qemu_log_mask(LOG_UNIMP, "%s: Software interrupts unavailable. "
+ "IRQs requested: 0x%016" PRIx64 "\n", __func__, data);
+ break;
+ case 0x38: /* Software Interrupt Clear */
+ qemu_log_mask(LOG_UNIMP, "%s: Software interrupts unavailable. "
+ "IRQs to be cleared: 0x%016" PRIx64 "\n", __func__, data);
+ break;
+ case 0x50: /* Interrupt Event */
+ /* Register has deposit64() semantics - overwrite the top four valid
+ * IRQ bits, as only the top four IRQs (GPIOs) can change their event
+ * type */
+ if (high) {
+ s->event &= ~AVIC_EVENT_W_MASK;
+ s->event |= (data & AVIC_EVENT_W_MASK);
+ } else {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Ignoring invalid write to interrupt event register");
+ }
+ break;
+ case 0x58: /* Edge Triggered Interrupt Clear */
+ s->raw &= ~(data & ~s->sense);
+ break;
+ case 0x00: /* IRQ Status */
+ case 0x08: /* FIQ Status */
+ case 0x10: /* Raw Interrupt Status */
+ case 0x40: /* Interrupt Sensitivity */
+ case 0x48: /* Interrupt Both Edge Trigger Control */
+ case 0x60: /* Edge Triggered Interrupt Status */
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Write of read-only register with offset 0x%"
+ HWADDR_PRIx "\n", __func__, offset);
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Bad register at offset 0x%" HWADDR_PRIx "\n",
+ __func__, offset);
+ break;
+ }
+ aspeed_vic_update(s);
+}
+
+static const MemoryRegionOps aspeed_vic_ops = {
+ .read = aspeed_vic_read,
+ .write = aspeed_vic_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid.min_access_size = 4,
+ .valid.max_access_size = 4,
+ .valid.unaligned = false,
+};
+
+static void aspeed_vic_reset(DeviceState *dev)
+{
+ AspeedVICState *s = ASPEED_VIC(dev);
+
+ s->level = 0;
+ s->raw = 0;
+ s->select = 0;
+ s->enable = 0;
+ s->trigger = 0;
+ s->sense = 0x1F07FFF8FFFFULL;
+ s->dual_edge = 0xF800070000ULL;
+ s->event = 0x5F07FFF8FFFFULL;
+}
+
+#define AVIC_IO_REGION_SIZE 0x20000
+
+static void aspeed_vic_realize(DeviceState *dev, Error **errp)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ AspeedVICState *s = ASPEED_VIC(dev);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_vic_ops, s,
+ TYPE_ASPEED_VIC, AVIC_IO_REGION_SIZE);
+
+ sysbus_init_mmio(sbd, &s->iomem);
+
+ qdev_init_gpio_in(dev, aspeed_vic_set_irq, ASPEED_VIC_NR_IRQS);
+ sysbus_init_irq(sbd, &s->irq);
+ sysbus_init_irq(sbd, &s->fiq);
+}
+
+static const VMStateDescription vmstate_aspeed_vic = {
+ .name = "aspeed.new-vic",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(level, AspeedVICState),
+ VMSTATE_UINT64(raw, AspeedVICState),
+ VMSTATE_UINT64(select, AspeedVICState),
+ VMSTATE_UINT64(enable, AspeedVICState),
+ VMSTATE_UINT64(trigger, AspeedVICState),
+ VMSTATE_UINT64(sense, AspeedVICState),
+ VMSTATE_UINT64(dual_edge, AspeedVICState),
+ VMSTATE_UINT64(event, AspeedVICState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void aspeed_vic_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ dc->realize = aspeed_vic_realize;
+ dc->reset = aspeed_vic_reset;
+ dc->desc = "ASPEED Interrupt Controller (New)";
+ dc->vmsd = &vmstate_aspeed_vic;
+}
+
+static const TypeInfo aspeed_vic_info = {
+ .name = TYPE_ASPEED_VIC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(AspeedVICState),
+ .class_init = aspeed_vic_class_init,
+};
+
+static void aspeed_vic_register_types(void)
+{
+ type_register_static(&aspeed_vic_info);
+}
+
+type_init(aspeed_vic_register_types);
new file mode 100644
@@ -0,0 +1,48 @@
+/*
+ * ASPEED Interrupt Controller (New)
+ *
+ * Andrew Jeffery <andrew@aj.id.au>
+ *
+ * Copyright 2016 IBM Corp.
+ *
+ * This code is licensed under the GPL version 2 or later. See
+ * the COPYING file in the top-level directory.
+ *
+ * Need to add SVIC and CVIC support
+ */
+#ifndef ASPEED_VIC_H
+#define ASPEED_VIC_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_ASPEED_VIC "aspeed.vic"
+#define ASPEED_VIC(obj) OBJECT_CHECK(AspeedVICState, (obj), TYPE_ASPEED_VIC)
+
+#define ASPEED_VIC_NR_IRQS 51
+
+typedef struct AspeedVICState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion iomem;
+ qemu_irq irq;
+ qemu_irq fiq;
+
+ uint64_t level;
+ uint64_t raw;
+ uint64_t select;
+ uint64_t enable;
+ uint64_t trigger;
+
+ /* 0=edge, 1=level */
+ uint64_t sense;
+
+ /* 0=single-edge, 1=dual-edge */
+ uint64_t dual_edge;
+
+ /* 0=low-sensitive/falling-edge, 1=high-sensitive/rising-edge */
+ uint64_t event;
+} AspeedVICState;
+
+#endif /* ASPEED_VIC_H */
@@ -1901,3 +1901,10 @@ aspeed_timer_ctrl_pulse_enable(uint8_t i, bool enable) "Timer %" PRIu8 ": %d"
aspeed_timer_set_ctrl2(uint32_t value) "Value: 0x%" PRIx32
aspeed_timer_set_value(int timer, int reg, uint32_t value) "Timer %d register %d: 0x%" PRIx32
aspeed_timer_read(uint64_t offset, unsigned size, uint64_t value) "From 0x%" PRIx64 ": of size %u: 0x%" PRIx64
+
+# hw/intc/aspeed_vic.c
+aspeed_vic_set_irq(int irq, int level) "Enabling IRQ %d: %d"
+aspeed_vic_update_fiq(int flags) "Raising FIQ: %d"
+aspeed_vic_update_irq(int flags) "Raising IRQ: %d"
+aspeed_vic_read(uint64_t offset, unsigned size, uint32_t value) "From 0x%" PRIx64 " of size %u: 0x%" PRIx32
+aspeed_vic_write(uint64_t offset, unsigned size, uint32_t data) "To 0x%" PRIx64 " of size %u: 0x%" PRIx32