Commit b6fb986047 for qemu.org
commit b6fb9860475356dd9e12fcd431b844472e3c193d
Author: Kane Chen <kane_chen@aspeedtech.com>
Date: Wed Feb 4 08:21:21 2026 +0000
hw/arm/aspeed: Integrate AST1700 device into AST27X0
Connect the AST1700 device as a child of the AST27X0 model to reflect
its role in DC-SCM 2.0 LTPI-based architectures. This patch wires
the AST1700 device into the platform without introducing functional
peripherals.
This forms the base for LTPI expander emulation in QEMU using
AST27X0 as the host controller.
Note: ioexp_num is set to 0 at this stage. Once all related devices
and interrupts are fully implemented, ioexp_num will be updated to
its expected value. This ensures the machine remains functional at
every commit and avoids potential compiler or build issues.
Signed-off-by: Kane-Chen-AS <kane_chen@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Nabih Estefan <nabihestefan@google.com>
Tested-by: Nabih Estefan <nabihestefan@google.com>
Link: https://lore.kernel.org/qemu-devel/20260204082113.3955407-6-kane_chen@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c
index bbcb6e0127..a05112e2b0 100644
--- a/hw/arm/aspeed_ast27x0.c
+++ b/hw/arm/aspeed_ast27x0.c
@@ -26,7 +26,6 @@
#define AST2700_SOC_IO_SIZE 0x00FE0000
#define AST2700_SOC_IOMEM_SIZE 0x01000000
#define AST2700_SOC_DPMCU_SIZE 0x00040000
-#define AST2700_SOC_LTPI_SIZE 0x01000000
static const hwaddr aspeed_soc_ast2700_memmap[] = {
[ASPEED_DEV_VBOOTROM] = 0x00000000,
@@ -91,7 +90,8 @@ static const hwaddr aspeed_soc_ast2700_memmap[] = {
[ASPEED_DEV_LTPI_CTRL1] = 0x14C34000,
[ASPEED_DEV_LTPI_CTRL2] = 0x14C35000,
[ASPEED_DEV_WDT] = 0x14C37000,
- [ASPEED_DEV_LTPI] = 0x30000000,
+ [ASPEED_DEV_LTPI_IO0] = 0x30000000,
+ [ASPEED_DEV_LTPI_IO1] = 0x50000000,
[ASPEED_DEV_PCIE_MMIO0] = 0x60000000,
[ASPEED_DEV_PCIE_MMIO1] = 0x80000000,
[ASPEED_DEV_PCIE_MMIO2] = 0xA0000000,
@@ -498,10 +498,14 @@ static void aspeed_soc_ast2700_init(Object *obj)
&s->ltpi_ctrl[i], TYPE_ASPEED_LTPI);
}
+ for (i = 0; i < sc->ioexp_num; i++) {
+ /* AST1700 IOEXP */
+ object_initialize_child(obj, "ioexp[*]", &s->ioexp[i],
+ TYPE_ASPEED_AST1700);
+ }
+
object_initialize_child(obj, "dpmcu", &s->dpmcu,
TYPE_UNIMPLEMENTED_DEVICE);
- object_initialize_child(obj, "ltpi", &s->ltpi,
- TYPE_UNIMPLEMENTED_DEVICE);
object_initialize_child(obj, "iomem", &s->iomem,
TYPE_UNIMPLEMENTED_DEVICE);
object_initialize_child(obj, "iomem0", &s->iomem0,
@@ -995,14 +999,19 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp)
aspeed_mmio_map(s->memory, SYS_BUS_DEVICE(ltpi_ctrl), 0, ltpi_base);
}
+ /* IO Expander */
+ for (i = 0; i < sc->ioexp_num; i++) {
+ if (!sysbus_realize(SYS_BUS_DEVICE(&s->ioexp[i]), errp)) {
+ return;
+ }
+ sysbus_mmio_map(SYS_BUS_DEVICE(&s->ioexp[i]), 0,
+ sc->memmap[ASPEED_DEV_LTPI_IO0 + i]);
+ }
+
aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->dpmcu),
"aspeed.dpmcu",
sc->memmap[ASPEED_DEV_DPMCU],
AST2700_SOC_DPMCU_SIZE);
- aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->ltpi),
- "aspeed.ltpi",
- sc->memmap[ASPEED_DEV_LTPI],
- AST2700_SOC_LTPI_SIZE);
aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->iomem),
"aspeed.io",
sc->memmap[ASPEED_DEV_IOMEM],
@@ -1041,6 +1050,7 @@ static void aspeed_soc_ast2700a1_class_init(ObjectClass *oc, const void *data)
sc->macs_num = 3;
sc->uarts_num = 13;
sc->num_cpus = 4;
+ sc->ioexp_num = 0;
sc->uarts_base = ASPEED_DEV_UART0;
sc->irqmap = aspeed_soc_ast2700a1_irqmap;
sc->memmap = aspeed_soc_ast2700_memmap;
diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
index 7b08cca908..f19bab3457 100644
--- a/include/hw/arm/aspeed_soc.h
+++ b/include/hw/arm/aspeed_soc.h
@@ -45,6 +45,7 @@
#include "hw/char/serial-mm.h"
#include "hw/intc/arm_gicv3.h"
#include "hw/misc/aspeed_ltpi.h"
+#include "hw/arm/aspeed_ast1700.h"
#define VBOOTROM_FILE_NAME "ast27x0_bootrom.bin"
@@ -112,10 +113,10 @@ struct AspeedSoCState {
UnimplementedDeviceState dpmcu;
UnimplementedDeviceState espi;
UnimplementedDeviceState udc;
- UnimplementedDeviceState ltpi;
UnimplementedDeviceState jtag[ASPEED_JTAG_NUM];
AspeedAPB2OPBState fsi[2];
AspeedLTPIState ltpi_ctrl[ASPEED_IOEXP_NUM];
+ AspeedAST1700SoCState ioexp[ASPEED_IOEXP_NUM];
};
#define TYPE_ASPEED_SOC "aspeed-soc"
@@ -178,6 +179,7 @@ struct AspeedSoCClass {
int macs_num;
int uarts_num;
int uarts_base;
+ int ioexp_num;
const int *irqmap;
const hwaddr *memmap;
uint32_t num_cpus;
@@ -190,7 +192,6 @@ enum {
ASPEED_DEV_IOMEM,
ASPEED_DEV_IOMEM0,
ASPEED_DEV_IOMEM1,
- ASPEED_DEV_LTPI,
ASPEED_DEV_UART0,
ASPEED_DEV_UART1,
ASPEED_DEV_UART2,
@@ -285,6 +286,8 @@ enum {
ASPEED_DEV_IPC1,
ASPEED_DEV_LTPI_CTRL1,
ASPEED_DEV_LTPI_CTRL2,
+ ASPEED_DEV_LTPI_IO0,
+ ASPEED_DEV_LTPI_IO1,
};
const char *aspeed_soc_cpu_type(const char * const *valid_cpu_types);