[PATCH v2 1/2] hw/misc: Add a model for the ASPEED System Control Unit
Andrew Jeffery
andrew at aj.id.au
Thu Jun 16 15:31:39 AEST 2016
The SCU is a collection of chip-level control registers that manage the
various functions supported by the AST2400. Typically the bits control
interactions with clocks, external hardware or reset behaviour, and we
can largly take a hands-off approach to reads and writes.
Firmware makes heavy use of the state to determine how to boot, but the
reset values vary from SoC to SoC. qdev properties are exposed so that
the integrating SoC model can configure the appropriate reset values.
Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
---
hw/misc/Makefile.objs | 1 +
hw/misc/aspeed_scu.c | 147 +++++++++++++++++++++++++++++++++++++++++++
include/hw/misc/aspeed_scu.h | 108 +++++++++++++++++++++++++++++++
trace-events | 3 +
4 files changed, 259 insertions(+)
create mode 100644 hw/misc/aspeed_scu.c
create mode 100644 include/hw/misc/aspeed_scu.h
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index ffb49c11aca6..54020aa06c00 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -52,3 +52,4 @@ obj-$(CONFIG_PVPANIC) += pvpanic.o
obj-$(CONFIG_EDU) += edu.o
obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o
obj-$(CONFIG_AUX) += aux.o
+obj-$(CONFIG_ASPEED_SOC) += aspeed_scu.o
diff --git a/hw/misc/aspeed_scu.c b/hw/misc/aspeed_scu.c
new file mode 100644
index 000000000000..492cf82af425
--- /dev/null
+++ b/hw/misc/aspeed_scu.c
@@ -0,0 +1,147 @@
+/*
+ * ASPEED System Control Unit
+ *
+ * Andrew Jeffery <andrew at 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.
+ */
+
+#include "qemu/osdep.h"
+#include <inttypes.h>
+#include "hw/misc/aspeed_scu.h"
+#include "hw/qdev-properties.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "qemu/bitops.h"
+#include "trace.h"
+
+#define SCU_KEY 0x1688A8A8
+#define SCU_IO_REGION_SIZE 0x20000
+
+static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size)
+{
+ AspeedSCUState *s = ASPEED_SCU(opaque);
+
+ if (ASPEED_SCU_TO_REG(offset) >= ARRAY_SIZE(s->regs)) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
+ __func__, offset);
+ return 0;
+ }
+
+ switch (offset) {
+ case ASPEED_SCU_WAKEUP_EN:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n",
+ __func__, offset);
+ break;
+ }
+
+ return s->regs[ASPEED_SCU_TO_REG(offset)];
+}
+
+static void aspeed_scu_write(void *opaque, hwaddr offset, uint64_t data,
+ unsigned size)
+{
+ AspeedSCUState *s = ASPEED_SCU(opaque);
+
+ if (ASPEED_SCU_TO_REG(offset) >= ARRAY_SIZE(s->regs)) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
+ __func__, offset);
+ return;
+ }
+
+ if (offset > ASPEED_SCU_PROT_KEY && offset < ASPEED_SCU_CPU2_BASE_SEG1 &&
+ s->regs[ASPEED_SCU_TO_REG(ASPEED_SCU_PROT_KEY)] != SCU_KEY) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__);
+ return;
+ }
+
+ trace_aspeed_scu_write(offset, size, data);
+
+ switch (offset) {
+ case ASPEED_SCU_FREQ_CNTR_EVAL:
+ case ASPEED_SCU_VGA_SCRATCH1 ... ASPEED_SCU_VGA_SCRATCH8:
+ case ASPEED_SCU_RNG_DATA:
+ case ASPEED_SCU_REV_ID:
+ case ASPEED_SCU_FREE_CNTR4:
+ case ASPEED_SCU_FREE_CNTR4_EXT:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n",
+ __func__, offset);
+ return;
+ }
+
+ s->regs[ASPEED_SCU_TO_REG(offset)] = (uint32_t) data;
+}
+
+static const MemoryRegionOps aspeed_scu_ops = {
+ .read = aspeed_scu_read,
+ .write = aspeed_scu_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid.min_access_size = 4,
+ .valid.max_access_size = 4,
+ .valid.unaligned = false,
+};
+
+static void aspeed_scu_reset(DeviceState *dev)
+{
+ AspeedSCUState *s = ASPEED_SCU(dev);
+
+ memcpy(s->regs, s->reset, sizeof(s->regs));
+}
+
+static void aspeed_scu_realize(DeviceState *dev, Error **errp)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ AspeedSCUState *s = ASPEED_SCU(dev);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_scu_ops, s,
+ TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE);
+
+ sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static const VMStateDescription vmstate_aspeed_scu = {
+ .name = "aspeed.new-vic",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_SCU_NR_REGS),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static Property aspeed_scu_properties[] = {
+ DEFINE_PROP_ARRAY("reset", AspeedSCUState, num_resets, reset,
+ qdev_prop_uint32, uint32_t),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void aspeed_scu_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ dc->realize = aspeed_scu_realize;
+ dc->reset = aspeed_scu_reset;
+ dc->desc = "ASPEED System Control Unit";
+ dc->vmsd = &vmstate_aspeed_scu;
+ dc->props = aspeed_scu_properties;
+}
+
+static const TypeInfo aspeed_scu_info = {
+ .name = TYPE_ASPEED_SCU,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(AspeedSCUState),
+ .class_init = aspeed_scu_class_init,
+};
+
+static void aspeed_scu_register_types(void)
+{
+ type_register_static(&aspeed_scu_info);
+}
+
+type_init(aspeed_scu_register_types);
diff --git a/include/hw/misc/aspeed_scu.h b/include/hw/misc/aspeed_scu.h
new file mode 100644
index 000000000000..f95c5c8a7d74
--- /dev/null
+++ b/include/hw/misc/aspeed_scu.h
@@ -0,0 +1,108 @@
+/*
+ * ASPEED System Control Unit
+ *
+ * Andrew Jeffery <andrew at 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.
+ */
+#ifndef ASPEED_SCU_H
+#define ASPEED_SCU_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_ASPEED_SCU "aspeed.scu"
+#define ASPEED_SCU(obj) OBJECT_CHECK(AspeedSCUState, (obj), TYPE_ASPEED_SCU)
+
+#define ASPEED_SCU_NR_REGS (0x1A8 >> 2)
+
+#define ASPEED_SCU_PROT_KEY 0x00
+#define ASPEED_SCU_SYS_RST_CTRL 0x04
+#define ASPEED_SCU_CLK_SEL 0x08
+#define ASPEED_SCU_CLK_STOP_CTRL 0x0C
+#define ASPEED_SCU_FREQ_CNTR_CTRL 0x10
+#define ASPEED_SCU_FREQ_CNTR_EVAL 0x14
+#define ASPEED_SCU_IRQ_CTRL 0x18
+#define ASPEED_SCU_D2PLL_PARAM 0x1C
+#define ASPEED_SCU_MPLL_PARAM 0x20
+#define ASPEED_SCU_HPLL_PARAM 0x24
+#define ASPEED_SCU_FREQ_CNTR_RANGE 0x28
+#define ASPEED_SCU_MISC_CTRL1 0x2C
+#define ASPEED_SCU_PCI_CTRL1 0x30
+#define ASPEED_SCU_PCI_CTRL2 0x34
+#define ASPEED_SCU_PCI_CTRL3 0x38
+#define ASPEED_SCU_SYS_RST_STATUS 0x3C
+#define ASPEED_SCU_SOC_SCRATCH1 0x40
+#define ASPEED_SCU_SOC_SCRATCH2 0x44
+#define ASPEED_SCU_MAC_CLK_DELAY 0x48
+#define ASPEED_SCU_MISC_CTRL2 0x4C
+#define ASPEED_SCU_VGA_SCRATCH1 0x50
+#define ASPEED_SCU_VGA_SCRATCH2 0x54
+#define ASPEED_SCU_VGA_SCRATCH3 0x58
+#define ASPEED_SCU_VGA_SCRATCH4 0x5C
+#define ASPEED_SCU_VGA_SCRATCH5 0x60
+#define ASPEED_SCU_VGA_SCRATCH6 0x64
+#define ASPEED_SCU_VGA_SCRATCH7 0x68
+#define ASPEED_SCU_VGA_SCRATCH8 0x6C
+#define ASPEED_SCU_HW_STRAP1 0x70
+#define ASPEED_SCU_RNG_CTRL 0x74
+#define ASPEED_SCU_RNG_DATA 0x78
+#define ASPEED_SCU_REV_ID 0x7C
+#define ASPEED_SCU_PINMUX_CTRL1 0x80
+#define ASPEED_SCU_PINMUX_CTRL2 0x84
+#define ASPEED_SCU_PINMUX_CTRL3 0x88
+#define ASPEED_SCU_PINMUX_CTRL4 0x8C
+#define ASPEED_SCU_PINMUX_CTRL5 0x90
+#define ASPEED_SCU_PINMUX_CTRL6 0x94
+#define ASPEED_SCU_WDT_RST_CTRL 0x9C
+#define ASPEED_SCU_PINMUX_CTRL7 0xA0
+#define ASPEED_SCU_PINMUX_CTRL8 0xA4
+#define ASPEED_SCU_PINMUX_CTRL9 0xA8
+#define ASPEED_SCU_WAKEUP_EN 0xC0
+#define ASPEED_SCU_WAKEUP_CTRL 0xC4
+#define ASPEED_SCU_HW_STRAP2 0xD0
+#define ASPEED_SCU_FREE_CNTR4 0xE0
+#define ASPEED_SCU_FREE_CNTR4_EXT 0xE4
+#define ASPEED_SCU_CPU2_CTRL 0x100
+#define ASPEED_SCU_CPU2_BASE_SEG1 0x104
+#define ASPEED_SCU_CPU2_BASE_SEG2 0x108
+#define ASPEED_SCU_CPU2_BASE_SEG3 0x10C
+#define ASPEED_SCU_CPU2_BASE_SEG4 0x110
+#define ASPEED_SCU_CPU2_BASE_SEG5 0x114
+#define ASPEED_SCU_CPU2_CACHE_CTRL 0x118
+#define ASPEED_SCU_UART_HPLL_CLK 0x160
+#define ASPEED_SCU_PCIE_CTRL 0x180
+#define ASPEED_SCU_BMC_MMIO_CTRL 0x184
+#define ASPEED_SCU_RELOC_DECODE_BASE1 0x188
+#define ASPEED_SCU_RELOC_DECODE_BASE2 0x18C
+#define ASPEED_SCU_MAILBOX_DECODE_BASE 0x190
+#define ASPEED_SCU_SRAM_DECODE_BASE1 0x194
+#define ASPEED_SCU_SRAM_DECODE_BASE2 0x198
+#define ASPEED_SCU_BMC_REV_ID 0x19C
+#define ASPEED_SCU_BMC_DEV_ID 0x1A4
+
+#define ASPEED_SCU_TO_REG(offset) ((offset) >> 2)
+
+typedef struct AspeedSCUState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion iomem;
+
+ uint32_t regs[ASPEED_SCU_NR_REGS];
+ uint32_t *reset;
+ uint32_t num_resets;
+} AspeedSCUState;
+
+typedef struct AspeedSCUResetCfg {
+ uint32_t offset;
+ uint32_t val;
+} AspeedSCUResetCfg;
+
+void aspeed_scu_configure_reset(AspeedSCUState *scu,
+ const struct AspeedSCUResetCfg vals[], int n, Error **errp);
+
+#endif /* ASPEED_SCU_H */
diff --git a/trace-events b/trace-events
index 2f14205de047..24749c414ee7 100644
--- a/trace-events
+++ b/trace-events
@@ -2164,3 +2164,6 @@ e1000e_cfg_support_virtio(bool support) "Virtio header supported: %d"
e1000e_vm_state_running(void) "VM state is running"
e1000e_vm_state_stopped(void) "VM state is stopped"
+
+# hw/misc/aspeed_scu.c
+aspeed_scu_write(uint64_t offset, unsigned size, uint32_t data) "To 0x%" PRIx64 " of size %u: 0x%" PRIx32
--
2.7.4
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