From: Cédric Le Goater <clg@kaod.org>

Currently, we link the DRAM memory region to the FMC model (for DMAs)
through a property alias at the SoC level. The I2C model will need a
similar region for DMA support, add a DRAM region property at the SoC
level for both model to use.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Tested-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20191119141211.25716-4-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/arm/aspeed_soc.h | 1 +
 hw/arm/aspeed_ast2600.c     | 7 +++++--
 hw/arm/aspeed_soc.c         | 9 +++++++--
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
index 495c08be1b8..e84380984f7 100644
--- a/include/hw/arm/aspeed_soc.h
+++ b/include/hw/arm/aspeed_soc.h
@@ -40,6 +40,7 @@ typedef struct AspeedSoCState {
     ARMCPU cpu[ASPEED_CPUS_NUM];
     uint32_t num_cpus;
     A15MPPrivState     a7mpcore;
+    MemoryRegion *dram_mr;
     MemoryRegion sram;
     AspeedVICState vic;
     AspeedRtcState rtc;
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 931887ac681..a403c2aae06 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -158,8 +158,6 @@ static void aspeed_soc_ast2600_init(Object *obj)
                           typename);
     object_property_add_alias(obj, "num-cs", OBJECT(&s->fmc), "num-cs",
                               &error_abort);
-    object_property_add_alias(obj, "dram", OBJECT(&s->fmc), "dram",
-                              &error_abort);
 
     for (i = 0; i < sc->spis_num; i++) {
         snprintf(typename, sizeof(typename), "aspeed.spi%d-%s", i + 1, socname);
@@ -362,6 +360,11 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     }
 
     /* FMC, The number of CS is set at the board level */
+    object_property_set_link(OBJECT(&s->fmc), OBJECT(s->dram_mr), "dram", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
     object_property_set_int(OBJECT(&s->fmc), sc->memmap[ASPEED_SDRAM],
                             "sdram-base", &err);
     if (err) {
diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index f4fe243458f..dd1ee0e3336 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -175,8 +175,6 @@ static void aspeed_soc_init(Object *obj)
                           typename);
     object_property_add_alias(obj, "num-cs", OBJECT(&s->fmc), "num-cs",
                               &error_abort);
-    object_property_add_alias(obj, "dram", OBJECT(&s->fmc), "dram",
-                              &error_abort);
 
     for (i = 0; i < sc->spis_num; i++) {
         snprintf(typename, sizeof(typename), "aspeed.spi%d-%s", i + 1, socname);
@@ -323,6 +321,11 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
                        aspeed_soc_get_irq(s, ASPEED_I2C));
 
     /* FMC, The number of CS is set at the board level */
+    object_property_set_link(OBJECT(&s->fmc), OBJECT(s->dram_mr), "dram", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
     object_property_set_int(OBJECT(&s->fmc), sc->memmap[ASPEED_SDRAM],
                             "sdram-base", &err);
     if (err) {
@@ -429,6 +432,8 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
 }
 static Property aspeed_soc_properties[] = {
     DEFINE_PROP_UINT32("num-cpus", AspeedSoCState, num_cpus, 0),
+    DEFINE_PROP_LINK("dram", AspeedSoCState, dram_mr, TYPE_MEMORY_REGION,
+                     MemoryRegion *),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
2.20.1