[PATCH v1] Add dummy Aspeed AST2600 Display Port MCU (DPMCU)

[Troy Lee]

AST2600 Display Port MCU introduces 0x18000000~0x1803FFFF as it's memory
and io address. If guest machine try to access DPMCU memory, it will
cause a fatal error.

Signed-off-by: Troy Lee <troy_...@aspeedtech.com>
---
 hw/arm/aspeed_ast2600.c     | 8 ++++++++
 include/hw/arm/aspeed_soc.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 0384357a95..e33483fb5d 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -19,9 +19,11 @@
 #include "sysemu/sysemu.h"
 
 #define ASPEED_SOC_IOMEM_SIZE       0x00200000
+#define ASPEED_SOC_DPMCU_SIZE       0x00040000
 
 static const hwaddr aspeed_soc_ast2600_memmap[] = {
     [ASPEED_DEV_SRAM]      = 0x10000000,
+    [ASPEED_DEV_DPMCU]     = 0x18000000,
     /* 0x16000000     0x17FFFFFF : AHB BUS do LPC Bus bridge */
     [ASPEED_DEV_IOMEM]     = 0x1E600000,
     [ASPEED_DEV_PWM]       = 0x1E610000,
@@ -44,6 +46,7 @@ static const hwaddr aspeed_soc_ast2600_memmap[] = {
     [ASPEED_DEV_SCU]       = 0x1E6E2000,
     [ASPEED_DEV_XDMA]      = 0x1E6E7000,
     [ASPEED_DEV_ADC]       = 0x1E6E9000,
+    [ASPEED_DEV_DP]        = 0x1E6EB000,
     [ASPEED_DEV_VIDEO]     = 0x1E700000,
     [ASPEED_DEV_SDHCI]     = 0x1E740000,
     [ASPEED_DEV_EMMC]      = 0x1E750000,
@@ -104,6 +107,7 @@ static const int aspeed_soc_ast2600_irqmap[] = {
     [ASPEED_DEV_ETH3]      = 32,
     [ASPEED_DEV_ETH4]      = 33,
     [ASPEED_DEV_KCS]       = 138,   /* 138 -> 142 */
+    [ASPEED_DEV_DP]        = 62,
 };
 
 static qemu_irq aspeed_soc_get_irq(AspeedSoCState *s, int ctrl)
@@ -298,6 +302,10 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, 
Error **errp)
     memory_region_add_subregion(get_system_memory(),
                                 sc->memmap[ASPEED_DEV_SRAM], &s->sram);
 
+    /* DPMCU */
+    create_unimplemented_device("aspeed.dpmcu", sc->memmap[ASPEED_DEV_DPMCU],
+                                ASPEED_SOC_DPMCU_SIZE);
+
     /* SCU */
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->scu), errp)) {
         return;
diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
index 8139358549..18fb7eed46 100644
--- a/include/hw/arm/aspeed_soc.h
+++ b/include/hw/arm/aspeed_soc.h
@@ -139,6 +139,8 @@ enum {
     ASPEED_DEV_EMMC,
     ASPEED_DEV_KCS,
     ASPEED_DEV_HACE,
+    ASPEED_DEV_DPMCU,
+    ASPEED_DEV_DP,
 };
 
 #endif /* ASPEED_SOC_H */
-- 
2.25.1