From: Conor Dooley <conor.doo...@microchip.com>
The system controller on PolarFire SoC is access via a mailbox. The
control registers for this mailbox lie in the "IOSCB" region & the
interrupt is cleared via write to the "SYSREG" region. It also has a
QSPI controller, usually connected to a flash chip, that is used for
storing FPGA bitstreams and used for In-Application Programming (IAP).
Linux has an implementation of the system controller, through which the
hwrng is accessed, leading to load/store access faults.
Add the QSPI as unimplemented and a very basic (effectively
unimplemented) version of the system controller's mailbox. Rather than
purely marking the regions as unimplemented, service the mailbox
requests by reporting failures and raising the interrupt so a guest can
better handle the lack of support.
Signed-off-by: Conor Dooley <conor.doo...@microchip.com>
---
hw/misc/mchp_pfsoc_ioscb.c | 59 ++++++++++++++++++++++++++++-
hw/misc/mchp_pfsoc_sysreg.c | 19 ++++++++--
hw/riscv/microchip_pfsoc.c | 6 +++
include/hw/misc/mchp_pfsoc_ioscb.h | 3 ++
include/hw/misc/mchp_pfsoc_sysreg.h | 1 +
include/hw/riscv/microchip_pfsoc.h | 1 +
6 files changed, 83 insertions(+), 6 deletions(-)
diff --git a/hw/misc/mchp_pfsoc_ioscb.c b/hw/misc/mchp_pfsoc_ioscb.c
index f976e42f72..d7f27b4402 100644
--- a/hw/misc/mchp_pfsoc_ioscb.c
+++ b/hw/misc/mchp_pfsoc_ioscb.c
@@ -24,6 +24,7 @@
#include "qemu/bitops.h"
#include "qemu/log.h"
#include "qapi/error.h"
+#include "hw/irq.h"
#include "hw/sysbus.h"
#include "hw/misc/mchp_pfsoc_ioscb.h"
@@ -34,6 +35,9 @@
#define IOSCB_WHOLE_REG_SIZE 0x10000000
#define IOSCB_SUBMOD_REG_SIZE 0x1000
#define IOSCB_CCC_REG_SIZE 0x2000000
+#define IOSCB_CTRL_REG_SIZE 0x800
+#define IOSCB_QSPIXIP_REG_SIZE 0x200
+
/*
* There are many sub-modules in the IOSCB module.
@@ -45,6 +49,8 @@
#define IOSCB_LANE01_BASE 0x06500000
#define IOSCB_LANE23_BASE 0x06510000
#define IOSCB_CTRL_BASE 0x07020000
+#define IOSCB_QSPIXIP_BASE 0x07020100
+#define IOSCB_MAILBOX_BASE 0x07020800
#define IOSCB_CFG_BASE 0x07080000
#define IOSCB_CCC_BASE 0x08000000
#define IOSCB_PLL_MSS_BASE 0x0E001000
@@ -143,6 +149,45 @@ static const MemoryRegionOps mchp_pfsoc_io_calib_ddr_ops =
{
.endianness = DEVICE_LITTLE_ENDIAN,
};
+#define SERVICES_SR 0x54
+
+static uint64_t mchp_pfsoc_ctrl_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ MchpPfSoCIoscbState *s = opaque;
+ uint32_t val = 0;
+
+ switch (offset) {
+ case SERVICES_SR:
+ /*
+ * Although some services have no error codes, most do. All services
+ * that do implement errors, begin their error codes at 1. Treat all
+ * service requests as failures & return 1.
+ * See the "PolarFire® FPGA and PolarFire SoC FPGA System Services"
+ * user guide for more information on service error codes.
+ */
+ val = 1;
+ qemu_irq_raise(s->irq);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
+ "(size %d, offset 0x%" HWADDR_PRIx ")\n",
+ __func__, size, offset);
+ }
+
+ return val;
+}
+
+/*
+ * use the dummy write, since we are always going to report a failed message
+ * and therefore do not care what service is actually requested
+ */
+static const MemoryRegionOps mchp_pfsoc_ctrl_ops = {
+ .read = mchp_pfsoc_ctrl_read,
+ .write = mchp_pfsoc_dummy_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
static void mchp_pfsoc_ioscb_realize(DeviceState *dev, Error **errp)
{
MchpPfSoCIoscbState *s = MCHP_PFSOC_IOSCB(dev);
@@ -162,10 +207,18 @@ static void mchp_pfsoc_ioscb_realize(DeviceState *dev,
Error **errp)
"mchp.pfsoc.ioscb.lane23", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_LANE23_BASE, &s->lane23);
- memory_region_init_io(&s->ctrl, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
- "mchp.pfsoc.ioscb.ctrl", IOSCB_SUBMOD_REG_SIZE);
+ memory_region_init_io(&s->ctrl, OBJECT(s), &mchp_pfsoc_ctrl_ops, s,
+ "mchp.pfsoc.ioscb.ctrl", IOSCB_CTRL_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CTRL_BASE, &s->ctrl);
+ memory_region_init_io(&s->qspixip, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+ "mchp.pfsoc.ioscb.qspixip", IOSCB_QSPIXIP_REG_SIZE);
+ memory_region_add_subregion(&s->container, IOSCB_QSPIXIP_BASE,
&s->qspixip);
+
+ memory_region_init_io(&s->mailbox, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
+ "mchp.pfsoc.ioscb.mailbox", IOSCB_SUBMOD_REG_SIZE);
+ memory_region_add_subregion(&s->container, IOSCB_MAILBOX_BASE,
&s->mailbox);
+
memory_region_init_io(&s->cfg, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfg", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFG_BASE, &s->cfg);
@@ -222,6 +275,8 @@ static void mchp_pfsoc_ioscb_realize(DeviceState *dev,
Error **errp)
IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_SGMII_BASE,
&s->io_calib_sgmii);
+
+ sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
}
static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, void *data)
diff --git a/hw/misc/mchp_pfsoc_sysreg.c b/hw/misc/mchp_pfsoc_sysreg.c
index 89571eded5..9822fb05fd 100644
--- a/hw/misc/mchp_pfsoc_sysreg.c
+++ b/hw/misc/mchp_pfsoc_sysreg.c
@@ -24,10 +24,12 @@
#include "qemu/bitops.h"
#include "qemu/log.h"
#include "qapi/error.h"
+#include "hw/irq.h"
#include "hw/sysbus.h"
#include "hw/misc/mchp_pfsoc_sysreg.h"
#define ENVM_CR 0xb8
+#define MESSAGE_INT 0x118c
static uint64_t mchp_pfsoc_sysreg_read(void *opaque, hwaddr offset,
unsigned size)
@@ -52,10 +54,18 @@ static uint64_t mchp_pfsoc_sysreg_read(void *opaque, hwaddr
offset,
static void mchp_pfsoc_sysreg_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
- qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
- "(size %d, value 0x%" PRIx64
- ", offset 0x%" HWADDR_PRIx ")\n",
- __func__, size, value, offset);
+ MchpPfSoCSysregState *s = opaque;
+ qemu_irq_lower(s->irq);
+ switch (offset) {
+ case MESSAGE_INT:
+ qemu_irq_lower(s->irq);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
+ "(size %d, value 0x%" PRIx64
+ ", offset 0x%" HWADDR_PRIx ")\n",
+ __func__, size, value, offset);
+ }
}
static const MemoryRegionOps mchp_pfsoc_sysreg_ops = {
@@ -73,6 +83,7 @@ static void mchp_pfsoc_sysreg_realize(DeviceState *dev, Error
**errp)
"mchp.pfsoc.sysreg",
MCHP_PFSOC_SYSREG_REG_SIZE);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->sysreg);
+ sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
}
static void mchp_pfsoc_sysreg_class_init(ObjectClass *klass, void *data)
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index 2a24e3437a..b10321b564 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -306,6 +306,9 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev,
Error **errp)
sysbus_realize(SYS_BUS_DEVICE(&s->sysreg), errp);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->sysreg), 0,
memmap[MICROCHIP_PFSOC_SYSREG].base);
+ sysbus_connect_irq(SYS_BUS_DEVICE(&s->sysreg), 0,
+ qdev_get_gpio_in(DEVICE(s->plic),
+ MICROCHIP_PFSOC_MAILBOX_IRQ));
/* AXISW */
create_unimplemented_device("microchip.pfsoc.axisw",
@@ -459,6 +462,9 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev,
Error **errp)
sysbus_realize(SYS_BUS_DEVICE(&s->ioscb), errp);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->ioscb), 0,
memmap[MICROCHIP_PFSOC_IOSCB].base);
+ sysbus_connect_irq(SYS_BUS_DEVICE(&s->ioscb), 0,
+ qdev_get_gpio_in(DEVICE(s->plic),
+ MICROCHIP_PFSOC_MAILBOX_IRQ));
/* FPGA Fabric */
create_unimplemented_device("microchip.pfsoc.fabricfic3",
diff --git a/include/hw/misc/mchp_pfsoc_ioscb.h
b/include/hw/misc/mchp_pfsoc_ioscb.h
index 687b213742..a1104862c8 100644
--- a/include/hw/misc/mchp_pfsoc_ioscb.h
+++ b/include/hw/misc/mchp_pfsoc_ioscb.h
@@ -29,6 +29,8 @@ typedef struct MchpPfSoCIoscbState {
MemoryRegion lane01;
MemoryRegion lane23;
MemoryRegion ctrl;
+ MemoryRegion qspixip;
+ MemoryRegion mailbox;
MemoryRegion cfg;
MemoryRegion ccc;
MemoryRegion pll_mss;
@@ -41,6 +43,7 @@ typedef struct MchpPfSoCIoscbState {
MemoryRegion cfm_sgmii;
MemoryRegion bc_sgmii;
MemoryRegion io_calib_sgmii;
+ qemu_irq irq;
} MchpPfSoCIoscbState;
#define TYPE_MCHP_PFSOC_IOSCB "mchp.pfsoc.ioscb"
diff --git a/include/hw/misc/mchp_pfsoc_sysreg.h
b/include/hw/misc/mchp_pfsoc_sysreg.h
index 546ba68f6a..3cebe40ea9 100644
--- a/include/hw/misc/mchp_pfsoc_sysreg.h
+++ b/include/hw/misc/mchp_pfsoc_sysreg.h
@@ -28,6 +28,7 @@
typedef struct MchpPfSoCSysregState {
SysBusDevice parent;
MemoryRegion sysreg;
+ qemu_irq irq;
} MchpPfSoCSysregState;
#define TYPE_MCHP_PFSOC_SYSREG "mchp.pfsoc.sysreg"
diff --git a/include/hw/riscv/microchip_pfsoc.h
b/include/hw/riscv/microchip_pfsoc.h
index 7e7950dd36..69a686b54a 100644
--- a/include/hw/riscv/microchip_pfsoc.h
+++ b/include/hw/riscv/microchip_pfsoc.h
@@ -147,6 +147,7 @@ enum {
MICROCHIP_PFSOC_MMUART2_IRQ = 92,
MICROCHIP_PFSOC_MMUART3_IRQ = 93,
MICROCHIP_PFSOC_MMUART4_IRQ = 94,
+ MICROCHIP_PFSOC_MAILBOX_IRQ = 96,
};
#define MICROCHIP_PFSOC_MANAGEMENT_CPU_COUNT 1
--
2.37.2
