hw/arm/allwinner-h3: add System Control module

The Allwinner H3 System on Chip has an System Control
module that provides system wide generic controls and
device information. This commit adds support for the
Allwinner H3 System Control module.

Signed-off-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20200311221854.30370-6-nieklinnenbank@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 70 insertions, 0 deletions

diff --git a/include/hw/arm/allwinner-h3.h b/include/hw/arm/allwinner-h3.h
index 4f4dcbcd17..43500c4262 100644
--- a/include/hw/arm/allwinner-h3.h
+++ b/include/hw/arm/allwinner-h3.h
@@ -40,6 +40,7 @@
 #include "hw/timer/allwinner-a10-pit.h"
 #include "hw/intc/arm_gic.h"
 #include "hw/misc/allwinner-h3-ccu.h"
+#include "hw/misc/allwinner-h3-sysctrl.h"
 #include "target/arm/cpu.h"
 
 /**
@@ -56,6 +57,7 @@ enum {
     AW_H3_SRAM_A1,
     AW_H3_SRAM_A2,
     AW_H3_SRAM_C,
+    AW_H3_SYSCTRL,
     AW_H3_EHCI0,
     AW_H3_OHCI0,
     AW_H3_EHCI1,
@@ -108,6 +110,7 @@ typedef struct AwH3State {
     const hwaddr *memmap;
     AwA10PITState timer;
     AwH3ClockCtlState ccu;
+    AwH3SysCtrlState sysctrl;
     GICState gic;
     MemoryRegion sram_a1;
     MemoryRegion sram_a2;
diff --git a/include/hw/misc/allwinner-h3-sysctrl.h b/include/hw/misc/allwinner-h3-sysctrl.h
new file mode 100644
index 0000000000..af4119e026
--- /dev/null
+++ b/include/hw/misc/allwinner-h3-sysctrl.h
@@ -0,0 +1,67 @@
+/*
+ * Allwinner H3 System Control 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_H3_SYSCTRL_H
+#define HW_MISC_ALLWINNER_H3_SYSCTRL_H
+
+#include "qom/object.h"
+#include "hw/sysbus.h"
+
+/**
+ * @name Constants
+ * @{
+ */
+
+/** Highest register address used by System Control device */
+#define AW_H3_SYSCTRL_REGS_MAXADDR   (0x30)
+
+/** Total number of known registers */
+#define AW_H3_SYSCTRL_REGS_NUM       ((AW_H3_SYSCTRL_REGS_MAXADDR / \
+                                      sizeof(uint32_t)) + 1)
+
+/** @} */
+
+/**
+ * @name Object model
+ * @{
+ */
+
+#define TYPE_AW_H3_SYSCTRL    "allwinner-h3-sysctrl"
+#define AW_H3_SYSCTRL(obj) \
+    OBJECT_CHECK(AwH3SysCtrlState, (obj), TYPE_AW_H3_SYSCTRL)
+
+/** @} */
+
+/**
+ * Allwinner H3 System Control object instance state
+ */
+typedef struct AwH3SysCtrlState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    /** Maps I/O registers in physical memory */
+    MemoryRegion iomem;
+
+    /** Array of hardware registers */
+    uint32_t regs[AW_H3_SYSCTRL_REGS_NUM];
+
+} AwH3SysCtrlState;
+
+#endif /* HW_MISC_ALLWINNER_H3_SYSCTRL_H */