Introduce a model of Xilinx Versal's Configuration Frame Unit's data out
port (CFU_FDRO).
Signed-off-by: Francisco Iglesias <francisco.igles...@amd.com>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
---
hw/misc/xlnx-versal-cfu.c | 96 +++++++++++++++++++++++++++++++
include/hw/misc/xlnx-versal-cfu.h | 12 ++++
2 files changed, 108 insertions(+)
diff --git a/hw/misc/xlnx-versal-cfu.c b/hw/misc/xlnx-versal-cfu.c
index b2dc6ab211..255c1bf4b8 100644
--- a/hw/misc/xlnx-versal-cfu.c
+++ b/hw/misc/xlnx-versal-cfu.c
@@ -264,6 +264,25 @@ static void cfu_stream_write(void *opaque, hwaddr addr,
uint64_t value,
}
}
+static uint64_t cfu_fdro_read(void *opaque, hwaddr addr, unsigned size)
+{
+ XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(opaque);
+ uint64_t ret = 0;
+
+ if (!fifo32_is_empty(&s->fdro_data)) {
+ ret = fifo32_pop(&s->fdro_data);
+ }
+
+ return ret;
+}
+
+static void cfu_fdro_write(void *opaque, hwaddr addr, uint64_t value,
+ unsigned size)
+{
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: Unsupported write from addr=%"
+ HWADDR_PRIx "\n", __func__, addr);
+}
+
static const MemoryRegionOps cfu_stream_ops = {
.read = cfu_stream_read,
.write = cfu_stream_write,
@@ -274,6 +293,16 @@ static const MemoryRegionOps cfu_stream_ops = {
},
};
+static const MemoryRegionOps cfu_fdro_ops = {
+ .read = cfu_fdro_read,
+ .write = cfu_fdro_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
static void cfu_apb_init(Object *obj)
{
XlnxVersalCFUAPB *s = XLNX_VERSAL_CFU_APB(obj);
@@ -305,6 +334,39 @@ static void cfu_apb_init(Object *obj)
sysbus_init_irq(sbd, &s->irq_cfu_imr);
}
+static void cfu_fdro_init(Object *obj)
+{
+ XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(obj);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+
+ memory_region_init_io(&s->iomem_fdro, obj, &cfu_fdro_ops, s,
+ TYPE_XLNX_VERSAL_CFU_FDRO, KEYHOLE_STREAM_4K);
+ sysbus_init_mmio(sbd, &s->iomem_fdro);
+ fifo32_create(&s->fdro_data, 8 * KiB / sizeof(uint32_t));
+}
+
+static void cfu_fdro_reset_enter(Object *obj, ResetType type)
+{
+ XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(obj);
+
+ fifo32_reset(&s->fdro_data);
+}
+
+static void cfu_fdro_cfi_transfer_packet(XlnxCfiIf *cfi_if, XlnxCfiPacket *pkt)
+{
+ XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(cfi_if);
+
+ if (fifo32_num_free(&s->fdro_data) >= ARRAY_SIZE(pkt->data)) {
+ for (int i = 0; i < ARRAY_SIZE(pkt->data); i++) {
+ fifo32_push(&s->fdro_data, pkt->data[i]);
+ }
+ } else {
+ /* It is a programming error to fill the fifo. */
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "CFU_FDRO: CFI data dropped due to full read fifo\n");
+ }
+}
+
static Property cfu_props[] = {
DEFINE_PROP_LINK("cframe0", XlnxVersalCFUAPB, cfg.cframe[0],
TYPE_XLNX_CFI_IF, XlnxCfiIf *),
@@ -351,6 +413,16 @@ static const VMStateDescription vmstate_cfu_apb = {
}
};
+static const VMStateDescription vmstate_cfu_fdro = {
+ .name = TYPE_XLNX_VERSAL_CFU_FDRO,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_FIFO32(fdro_data, XlnxVersalCFUFDRO),
+ VMSTATE_END_OF_LIST(),
+ }
+};
+
static void cfu_apb_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -360,6 +432,17 @@ static void cfu_apb_class_init(ObjectClass *klass, void
*data)
device_class_set_props(dc, cfu_props);
}
+static void cfu_fdro_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+ XlnxCfiIfClass *xcic = XLNX_CFI_IF_CLASS(klass);
+
+ dc->vmsd = &vmstate_cfu_fdro;
+ xcic->cfi_transfer_packet = cfu_fdro_cfi_transfer_packet;
+ rc->phases.enter = cfu_fdro_reset_enter;
+}
+
static const TypeInfo cfu_apb_info = {
.name = TYPE_XLNX_VERSAL_CFU_APB,
.parent = TYPE_SYS_BUS_DEVICE,
@@ -372,9 +455,22 @@ static const TypeInfo cfu_apb_info = {
}
};
+static const TypeInfo cfu_fdro_info = {
+ .name = TYPE_XLNX_VERSAL_CFU_FDRO,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(XlnxVersalCFUFDRO),
+ .class_init = cfu_fdro_class_init,
+ .instance_init = cfu_fdro_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_XLNX_CFI_IF },
+ { }
+ }
+};
+
static void cfu_apb_register_types(void)
{
type_register_static(&cfu_apb_info);
+ type_register_static(&cfu_fdro_info);
}
type_init(cfu_apb_register_types)
diff --git a/include/hw/misc/xlnx-versal-cfu.h
b/include/hw/misc/xlnx-versal-cfu.h
index 62d10caf27..73e9a21af4 100644
--- a/include/hw/misc/xlnx-versal-cfu.h
+++ b/include/hw/misc/xlnx-versal-cfu.h
@@ -20,10 +20,14 @@
#include "hw/sysbus.h"
#include "hw/register.h"
#include "hw/misc/xlnx-cfi-if.h"
+#include "qemu/fifo32.h"
#define TYPE_XLNX_VERSAL_CFU_APB "xlnx,versal-cfu-apb"
OBJECT_DECLARE_SIMPLE_TYPE(XlnxVersalCFUAPB, XLNX_VERSAL_CFU_APB)
+#define TYPE_XLNX_VERSAL_CFU_FDRO "xlnx,versal-cfu-fdro"
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxVersalCFUFDRO, XLNX_VERSAL_CFU_FDRO)
+
REG32(CFU_ISR, 0x0)
FIELD(CFU_ISR, USR_GTS_EVENT, 9, 1)
FIELD(CFU_ISR, USR_GSR_EVENT, 8, 1)
@@ -210,6 +214,14 @@ struct XlnxVersalCFUAPB {
} cfg;
};
+
+struct XlnxVersalCFUFDRO {
+ SysBusDevice parent_obj;
+ MemoryRegion iomem_fdro;
+
+ Fifo32 fdro_data;
+};
+
/**
* This is a helper function for updating a CFI data write fifo, an array of 4
* uint32_t and 128 bits of data that are allowed to be written through 4
--
2.34.1
