hw/arm/allwinner: add Security Identifier device

The Security Identifier device found in various Allwinner System on Chip
designs gives applications a per-board unique identifier. This commit
adds support for the Allwinner Security Identifier using a 128-bit
UUID value as input.

Signed-off-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20200311221854.30370-8-nieklinnenbank@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 63 insertions, 0 deletions

diff --git a/include/hw/arm/allwinner-h3.h b/include/hw/arm/allwinner-h3.h
index dc729176ab..85416d9d64 100644
--- a/include/hw/arm/allwinner-h3.h
+++ b/include/hw/arm/allwinner-h3.h
@@ -42,6 +42,7 @@
 #include "hw/misc/allwinner-h3-ccu.h"
 #include "hw/misc/allwinner-cpucfg.h"
 #include "hw/misc/allwinner-h3-sysctrl.h"
+#include "hw/misc/allwinner-sid.h"
 #include "target/arm/cpu.h"
 
 /**
@@ -59,6 +60,7 @@ enum {
     AW_H3_SRAM_A2,
     AW_H3_SRAM_C,
     AW_H3_SYSCTRL,
+    AW_H3_SID,
     AW_H3_EHCI0,
     AW_H3_OHCI0,
     AW_H3_EHCI1,
@@ -114,6 +116,7 @@ typedef struct AwH3State {
     AwH3ClockCtlState ccu;
     AwCpuCfgState cpucfg;
     AwH3SysCtrlState sysctrl;
+    AwSidState sid;
     GICState gic;
     MemoryRegion sram_a1;
     MemoryRegion sram_a2;
diff --git a/include/hw/misc/allwinner-sid.h b/include/hw/misc/allwinner-sid.h
new file mode 100644
index 0000000000..4c1fa4762b
--- /dev/null
+++ b/include/hw/misc/allwinner-sid.h
@@ -0,0 +1,60 @@
+/*
+ * Allwinner Security ID emulation
+ *
+ * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HW_MISC_ALLWINNER_SID_H
+#define HW_MISC_ALLWINNER_SID_H
+
+#include "qom/object.h"
+#include "hw/sysbus.h"
+#include "qemu/uuid.h"
+
+/**
+ * Object model
+ * @{
+ */
+
+#define TYPE_AW_SID    "allwinner-sid"
+#define AW_SID(obj) \
+    OBJECT_CHECK(AwSidState, (obj), TYPE_AW_SID)
+
+/** @} */
+
+/**
+ * Allwinner Security ID object instance state
+ */
+typedef struct AwSidState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    /** Maps I/O registers in physical memory */
+    MemoryRegion iomem;
+
+    /** Control register defines how and what to read */
+    uint32_t control;
+
+    /** RdKey register contains the data retrieved by the device */
+    uint32_t rdkey;
+
+    /** Stores the emulated device identifier */
+    QemuUUID identifier;
+
+} AwSidState;
+
+#endif /* HW_MISC_ALLWINNER_SID_H */