hw: arm: allwinner-sramc: Add SRAM Controller support for R40
Only a few important registers are added, especially the SRAM_VER
register.
Signed-off-by: qianfan Zhao <qianfanguijin@163.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 007a81e..2159de3 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -406,6 +406,7 @@
config ALLWINNER_R40
bool
default y if TCG && ARM
+ select ALLWINNER_SRAMC
select ALLWINNER_A10_PIT
select AXP2XX_PMU
select SERIAL
diff --git a/hw/arm/allwinner-r40.c b/hw/arm/allwinner-r40.c
index c018ad2..7d29eb2 100644
--- a/hw/arm/allwinner-r40.c
+++ b/hw/arm/allwinner-r40.c
@@ -39,6 +39,7 @@
[AW_R40_DEV_SRAM_A2] = 0x00004000,
[AW_R40_DEV_SRAM_A3] = 0x00008000,
[AW_R40_DEV_SRAM_A4] = 0x0000b400,
+ [AW_R40_DEV_SRAMC] = 0x01c00000,
[AW_R40_DEV_EMAC] = 0x01c0b000,
[AW_R40_DEV_MMC0] = 0x01c0f000,
[AW_R40_DEV_MMC1] = 0x01c10000,
@@ -76,7 +77,6 @@
static struct AwR40Unimplemented r40_unimplemented[] = {
{ "d-engine", 0x01000000, 4 * MiB },
{ "d-inter", 0x01400000, 128 * KiB },
- { "sram-c", 0x01c00000, 4 * KiB },
{ "dma", 0x01c02000, 4 * KiB },
{ "nfdc", 0x01c03000, 4 * KiB },
{ "ts", 0x01c04000, 4 * KiB },
@@ -288,6 +288,8 @@
"ram-addr");
object_property_add_alias(obj, "ram-size", OBJECT(&s->dramc),
"ram-size");
+
+ object_initialize_child(obj, "sramc", &s->sramc, TYPE_AW_SRAMC_SUN8I_R40);
}
static void allwinner_r40_realize(DeviceState *dev, Error **errp)
@@ -382,6 +384,9 @@
AW_R40_GIC_SPI_TIMER1));
/* SRAM */
+ sysbus_realize(SYS_BUS_DEVICE(&s->sramc), &error_fatal);
+ sysbus_mmio_map(SYS_BUS_DEVICE(&s->sramc), 0, s->memmap[AW_R40_DEV_SRAMC]);
+
memory_region_init_ram(&s->sram_a1, OBJECT(dev), "sram A1",
16 * KiB, &error_abort);
memory_region_init_ram(&s->sram_a2, OBJECT(dev), "sram A2",
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index efeb430..e4c2149 100644
--- a/hw/misc/Kconfig
+++ b/hw/misc/Kconfig
@@ -170,6 +170,9 @@
config LASI
bool
+config ALLWINNER_SRAMC
+ bool
+
config ALLWINNER_A10_CCM
bool
diff --git a/hw/misc/allwinner-sramc.c b/hw/misc/allwinner-sramc.c
new file mode 100644
index 0000000..a8b731f
--- /dev/null
+++ b/hw/misc/allwinner-sramc.c
@@ -0,0 +1,184 @@
+/*
+ * Allwinner R40 SRAM controller emulation
+ *
+ * Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.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/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/units.h"
+#include "hw/sysbus.h"
+#include "migration/vmstate.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qapi/error.h"
+#include "hw/qdev-properties.h"
+#include "hw/qdev-properties-system.h"
+#include "hw/misc/allwinner-sramc.h"
+#include "trace.h"
+
+/*
+ * register offsets
+ * https://linux-sunxi.org/SRAM_Controller_Register_Guide
+ */
+enum {
+ REG_SRAM_CTL1_CFG = 0x04, /* SRAM Control register 1 */
+ REG_SRAM_VER = 0x24, /* SRAM Version register */
+ REG_SRAM_R40_SOFT_ENTRY_REG0 = 0xbc,
+};
+
+/* REG_SRAMC_VERSION bit defines */
+#define SRAM_VER_READ_ENABLE (1 << 15)
+#define SRAM_VER_VERSION_SHIFT 16
+#define SRAM_VERSION_SUN8I_R40 0x1701
+
+static uint64_t allwinner_sramc_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ AwSRAMCState *s = AW_SRAMC(opaque);
+ AwSRAMCClass *sc = AW_SRAMC_GET_CLASS(s);
+ uint64_t val = 0;
+
+ switch (offset) {
+ case REG_SRAM_CTL1_CFG:
+ val = s->sram_ctl1;
+ break;
+ case REG_SRAM_VER:
+ /* bit15: lock bit, set this bit before reading this register */
+ if (s->sram_ver & SRAM_VER_READ_ENABLE) {
+ val = SRAM_VER_READ_ENABLE |
+ (sc->sram_version_code << SRAM_VER_VERSION_SHIFT);
+ }
+ break;
+ case REG_SRAM_R40_SOFT_ENTRY_REG0:
+ val = s->sram_soft_entry_reg0;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
+ __func__, (uint32_t)offset);
+ return 0;
+ }
+
+ trace_allwinner_sramc_read(offset, val);
+
+ return val;
+}
+
+static void allwinner_sramc_write(void *opaque, hwaddr offset,
+ uint64_t val, unsigned size)
+{
+ AwSRAMCState *s = AW_SRAMC(opaque);
+
+ trace_allwinner_sramc_write(offset, val);
+
+ switch (offset) {
+ case REG_SRAM_CTL1_CFG:
+ s->sram_ctl1 = val;
+ break;
+ case REG_SRAM_VER:
+ /* Only the READ_ENABLE bit is writeable */
+ s->sram_ver = val & SRAM_VER_READ_ENABLE;
+ break;
+ case REG_SRAM_R40_SOFT_ENTRY_REG0:
+ s->sram_soft_entry_reg0 = val;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
+ __func__, (uint32_t)offset);
+ break;
+ }
+}
+
+static const MemoryRegionOps allwinner_sramc_ops = {
+ .read = allwinner_sramc_read,
+ .write = allwinner_sramc_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+ .impl.min_access_size = 4,
+};
+
+static const VMStateDescription allwinner_sramc_vmstate = {
+ .name = "allwinner-sramc",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(sram_ver, AwSRAMCState),
+ VMSTATE_UINT32(sram_soft_entry_reg0, AwSRAMCState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void allwinner_sramc_reset(DeviceState *dev)
+{
+ AwSRAMCState *s = AW_SRAMC(dev);
+ AwSRAMCClass *sc = AW_SRAMC_GET_CLASS(s);
+
+ switch (sc->sram_version_code) {
+ case SRAM_VERSION_SUN8I_R40:
+ s->sram_ctl1 = 0x1300;
+ break;
+ }
+}
+
+static void allwinner_sramc_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->reset = allwinner_sramc_reset;
+ dc->vmsd = &allwinner_sramc_vmstate;
+}
+
+static void allwinner_sramc_init(Object *obj)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+ AwSRAMCState *s = AW_SRAMC(obj);
+
+ /* Memory mapping */
+ memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sramc_ops, s,
+ TYPE_AW_SRAMC, 1 * KiB);
+ sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static const TypeInfo allwinner_sramc_info = {
+ .name = TYPE_AW_SRAMC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_init = allwinner_sramc_init,
+ .instance_size = sizeof(AwSRAMCState),
+ .class_init = allwinner_sramc_class_init,
+};
+
+static void allwinner_r40_sramc_class_init(ObjectClass *klass, void *data)
+{
+ AwSRAMCClass *sc = AW_SRAMC_CLASS(klass);
+
+ sc->sram_version_code = SRAM_VERSION_SUN8I_R40;
+}
+
+static const TypeInfo allwinner_r40_sramc_info = {
+ .name = TYPE_AW_SRAMC_SUN8I_R40,
+ .parent = TYPE_AW_SRAMC,
+ .class_init = allwinner_r40_sramc_class_init,
+};
+
+static void allwinner_sramc_register(void)
+{
+ type_register_static(&allwinner_sramc_info);
+ type_register_static(&allwinner_r40_sramc_info);
+}
+
+type_init(allwinner_sramc_register)
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index b04d43e..78ca857 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -37,6 +37,7 @@
softmmu_ss.add(when: 'CONFIG_IVSHMEM_DEVICE', if_true: files('ivshmem.c'))
+softmmu_ss.add(when: 'CONFIG_ALLWINNER_SRAMC', if_true: files('allwinner-sramc.c'))
softmmu_ss.add(when: 'CONFIG_ALLWINNER_A10_CCM', if_true: files('allwinner-a10-ccm.c'))
softmmu_ss.add(when: 'CONFIG_ALLWINNER_A10_DRAMC', if_true: files('allwinner-a10-dramc.c'))
softmmu_ss.add(when: 'CONFIG_ALLWINNER_H3', if_true: files('allwinner-h3-ccu.c'))
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 8b68f07..4d1a0e1 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -33,6 +33,10 @@
allwinner_sid_read(uint64_t offset, uint64_t data, unsigned size) "offset 0x%" PRIx64 " data 0x%" PRIx64 " size %" PRIu32
allwinner_sid_write(uint64_t offset, uint64_t data, unsigned size) "offset 0x%" PRIx64 " data 0x%" PRIx64 " size %" PRIu32
+# allwinner-sramc.c
+allwinner_sramc_read(uint64_t offset, uint64_t data) "offset 0x%" PRIx64 " data 0x%" PRIx64
+allwinner_sramc_write(uint64_t offset, uint64_t data) "offset 0x%" PRIx64 " data 0x%" PRIx64
+
# avr_power.c
avr_power_read(uint8_t value) "power_reduc read value:%u"
avr_power_write(uint8_t value) "power_reduc write value:%u"
diff --git a/include/hw/arm/allwinner-r40.h b/include/hw/arm/allwinner-r40.h
index 5f2d084..72710d3 100644
--- a/include/hw/arm/allwinner-r40.h
+++ b/include/hw/arm/allwinner-r40.h
@@ -27,6 +27,7 @@
#include "hw/sd/allwinner-sdhost.h"
#include "hw/misc/allwinner-r40-ccu.h"
#include "hw/misc/allwinner-r40-dramc.h"
+#include "hw/misc/allwinner-sramc.h"
#include "hw/i2c/allwinner-i2c.h"
#include "hw/net/allwinner_emac.h"
#include "hw/net/allwinner-sun8i-emac.h"
@@ -38,6 +39,7 @@
AW_R40_DEV_SRAM_A2,
AW_R40_DEV_SRAM_A3,
AW_R40_DEV_SRAM_A4,
+ AW_R40_DEV_SRAMC,
AW_R40_DEV_EMAC,
AW_R40_DEV_MMC0,
AW_R40_DEV_MMC1,
@@ -102,6 +104,7 @@
ARMCPU cpus[AW_R40_NUM_CPUS];
const hwaddr *memmap;
+ AwSRAMCState sramc;
AwA10PITState timer;
AwSdHostState mmc[AW_R40_NUM_MMCS];
AwR40ClockCtlState ccu;
diff --git a/include/hw/misc/allwinner-sramc.h b/include/hw/misc/allwinner-sramc.h
new file mode 100644
index 0000000..66b01b8
--- /dev/null
+++ b/include/hw/misc/allwinner-sramc.h
@@ -0,0 +1,69 @@
+/*
+ * Allwinner SRAM controller emulation
+ *
+ * Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.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_SRAMC_H
+#define HW_MISC_ALLWINNER_SRAMC_H
+
+#include "qom/object.h"
+#include "hw/sysbus.h"
+#include "qemu/uuid.h"
+
+/**
+ * Object model
+ * @{
+ */
+#define TYPE_AW_SRAMC "allwinner-sramc"
+#define TYPE_AW_SRAMC_SUN8I_R40 TYPE_AW_SRAMC "-sun8i-r40"
+OBJECT_DECLARE_TYPE(AwSRAMCState, AwSRAMCClass, AW_SRAMC)
+
+/** @} */
+
+/**
+ * Allwinner SRAMC object instance state
+ */
+struct AwSRAMCState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+ /*< public >*/
+
+ /** Maps I/O registers in physical memory */
+ MemoryRegion iomem;
+
+ /* registers */
+ uint32_t sram_ctl1;
+ uint32_t sram_ver;
+ uint32_t sram_soft_entry_reg0;
+};
+
+/**
+ * Allwinner SRAM Controller class-level struct.
+ *
+ * This struct is filled by each sunxi device specific code
+ * such that the generic code can use this struct to support
+ * all devices.
+ */
+struct AwSRAMCClass {
+ /*< private >*/
+ SysBusDeviceClass parent_class;
+ /*< public >*/
+
+ uint32_t sram_version_code;
+};
+
+#endif /* HW_MISC_ALLWINNER_SRAMC_H */
