Connect the support for Versal True Random Number Generator
(TRNG) device.
Warning: unlike the TRNG component in a real device from the
Versal device familiy, the connected TRNG model is not of
cryptographic grade and is not intended for use cases when
cryptograpically strong TRNG is needed.
Signed-off-by: Tong Ho <tong...@amd.com>
---
hw/arm/Kconfig | 1 +
hw/arm/xlnx-versal-virt.c | 20 ++++++++++++++++++++
hw/arm/xlnx-versal.c | 16 ++++++++++++++++
include/hw/arm/xlnx-versal.h | 5 +++++
4 files changed, 42 insertions(+)
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 7e68348440..0a3ff6748d 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -482,6 +482,7 @@ config XLNX_VERSAL
select XLNX_BBRAM
select XLNX_EFUSE_VERSAL
select XLNX_USB_SUBSYS
+ select XLNX_VERSAL_TRNG
config NPCM7XX
bool
diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index 1ee2b8697f..c0704f416e 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -391,6 +391,25 @@ static void fdt_add_rtc_node(VersalVirt *s)
g_free(name);
}
+static void fdt_add_trng_node(VersalVirt *s)
+{
+ const char compat[] = TYPE_XLNX_VERSAL_TRNG;
+ const char interrupt_names[] = "trng";
+ g_autofree char *name = g_strdup_printf("/trng@%x", MM_PMC_TRNG);
+
+ qemu_fdt_add_subnode(s->fdt, name);
+
+ qemu_fdt_setprop_cells(s->fdt, name, "interrupts",
+ GIC_FDT_IRQ_TYPE_SPI, VERSAL_TRNG_IRQ,
+ GIC_FDT_IRQ_FLAGS_LEVEL_HI);
+ qemu_fdt_setprop(s->fdt, name, "interrupt-names",
+ interrupt_names, sizeof(interrupt_names));
+ qemu_fdt_setprop_sized_cells(s->fdt, name, "reg",
+ 2, MM_PMC_TRNG,
+ 2, MM_PMC_TRNG_SIZE);
+ qemu_fdt_setprop(s->fdt, name, "compatible", compat, sizeof(compat));
+}
+
static void fdt_add_bbram_node(VersalVirt *s)
{
const char compat[] = TYPE_XLNX_BBRAM;
@@ -690,6 +709,7 @@ static void versal_virt_init(MachineState *machine)
fdt_add_usb_xhci_nodes(s);
fdt_add_sd_nodes(s);
fdt_add_rtc_node(s);
+ fdt_add_trng_node(s);
fdt_add_bbram_node(s);
fdt_add_efuse_ctrl_node(s);
fdt_add_efuse_cache_node(s);
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index 60bf5fe657..4fd1924cf6 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -372,6 +372,21 @@ static void versal_create_rtc(Versal *s, qemu_irq *pic)
qdev_get_gpio_in(DEVICE(&s->pmc.apb_irq_orgate), 0));
}
+static void versal_create_trng(Versal *s, qemu_irq *pic)
+{
+ SysBusDevice *sbd;
+ MemoryRegion *mr;
+
+ object_initialize_child(OBJECT(s), "trng", &s->pmc.trng,
+ TYPE_XLNX_VERSAL_TRNG);
+ sbd = SYS_BUS_DEVICE(&s->pmc.trng);
+ sysbus_realize(sbd, &error_fatal);
+
+ mr = sysbus_mmio_get_region(sbd, 0);
+ memory_region_add_subregion(&s->mr_ps, MM_PMC_TRNG, mr);
+ sysbus_connect_irq(sbd, 0, pic[VERSAL_TRNG_IRQ]);
+}
+
static void versal_create_xrams(Versal *s, qemu_irq *pic)
{
int nr_xrams = ARRAY_SIZE(s->lpd.xram.ctrl);
@@ -757,6 +772,7 @@ static void versal_realize(DeviceState *dev, Error **errp)
versal_create_sds(s, pic);
versal_create_pmc_apb_irq_orgate(s, pic);
versal_create_rtc(s, pic);
+ versal_create_trng(s, pic);
versal_create_xrams(s, pic);
versal_create_bbram(s, pic);
versal_create_efuse(s, pic);
diff --git a/include/hw/arm/xlnx-versal.h b/include/hw/arm/xlnx-versal.h
index 39ee31185c..159ee26aad 100644
--- a/include/hw/arm/xlnx-versal.h
+++ b/include/hw/arm/xlnx-versal.h
@@ -31,6 +31,7 @@
#include "hw/dma/xlnx_csu_dma.h"
#include "hw/misc/xlnx-versal-crl.h"
#include "hw/misc/xlnx-versal-pmc-iou-slcr.h"
+#include "hw/misc/xlnx-versal-trng.h"
#include "hw/net/xlnx-versal-canfd.h"
#define TYPE_XLNX_VERSAL "xlnx-versal"
@@ -113,6 +114,7 @@ struct Versal {
} iou;
XlnxZynqMPRTC rtc;
+ XlnxVersalTRng trng;
XlnxBBRam bbram;
XlnxEFuse efuse;
XlnxVersalEFuseCtrl efuse_ctrl;
@@ -151,6 +153,7 @@ struct Versal {
#define VERSAL_OSPI_IRQ 124
#define VERSAL_SD0_IRQ_0 126
#define VERSAL_EFUSE_IRQ 139
+#define VERSAL_TRNG_IRQ 141
#define VERSAL_RTC_ALARM_IRQ 142
#define VERSAL_RTC_SECONDS_IRQ 143
@@ -244,4 +247,6 @@ struct Versal {
#define MM_PMC_CRP_SIZE 0x10000
#define MM_PMC_RTC 0xf12a0000
#define MM_PMC_RTC_SIZE 0x10000
+#define MM_PMC_TRNG 0xf1230000
+#define MM_PMC_TRNG_SIZE 0x10000
#endif
--
2.25.1
