samples: Support different base address of the shared mem

Now, in open_amp_rsc_table sample we support only the devices
that have the same value for driver and device physical address.
But, in case they are different, we need to convert from driver
to device address.

Therefore, add ranges property in device tree in case we need to
translate the addresses. If this property is found in device tree,
take both the driver and device address, and size.
Otherwise it works as before, take the device physical address and
size from reg property.

Signed-off-by: Iuliana Prodan <[email protected]>

doc/build/dts/api/api.rst

@@ -421,7 +421,8 @@ device.
    * - zephyr,ipc_shm
      - A node whose ``reg`` is used by the OpenAMP subsystem to determine the
        base address and size of the shared memory (SHM) usable for
-       interprocess-communication (IPC)
+       interprocess-communication (IPC).
+       A ``ranges`` property is used in case the driver and device physical addresses are different.
    * - zephyr,itcm
      - Instruction Tightly Coupled Memory node on some Arm SoCs
    * - zephyr,log-uart

samples/subsys/ipc/openamp_rsc_table/src/main_remote.c

@@ -33,8 +33,18 @@ LOG_MODULE_REGISTER(openamp_rsc_table, LOG_LEVEL_DBG);
 
 /* Constants derived from device tree */
 #define SHM_NODE		DT_CHOSEN(zephyr_ipc_shm)
-#define SHM_START_ADDR	DT_REG_ADDR(SHM_NODE)
-#define SHM_SIZE		DT_REG_SIZE(SHM_NODE)
+
+#if DT_NODE_HAS_PROP(SHM_NODE, ranges)
+static const uint32_t shm_start_addr = DT_RANGES_CHILD_BUS_ADDRESS_BY_IDX(SHM_NODE, 0);
+static const uint32_t shm_size = DT_RANGES_LENGTH_BY_IDX(SHM_NODE, 0);
+
+static metal_phys_addr_t val = DT_RANGES_PARENT_BUS_ADDRESS_BY_IDX(SHM_NODE, 0);
+static metal_phys_addr_t *shm_physmap_drv = &val;
+#else
+static const uint32_t shm_start_addr = DT_REG_ADDR(SHM_NODE);
+static const uint32_t shm_size = DT_REG_SIZE(SHM_NODE);
+static metal_phys_addr_t *shm_physmap_drv;
+#endif
 
 #define APP_TASK_STACK_SIZE (1024)
 
@@ -52,7 +62,7 @@ static struct k_thread thread_tty_data;
 static const struct device *const ipm_handle =
 	DEVICE_DT_GET(DT_CHOSEN(zephyr_ipc));
 
-static metal_phys_addr_t shm_physmap = SHM_START_ADDR;
+static metal_phys_addr_t shm_physmap = shm_start_addr;
 static metal_phys_addr_t rsc_tab_physmap;
 
 static struct metal_io_region shm_io_data; /* shared memory */
@@ -151,15 +161,15 @@ int platform_init(void)
 	}
 
 	/* declare shared memory region */
-	metal_io_init(shm_io, (void *)SHM_START_ADDR, &shm_physmap,
-		      SHM_SIZE, -1, 0, NULL);
+	metal_io_init(shm_io, (void *)shm_start_addr, &shm_physmap,
+		      shm_size, shm_physmap_drv, -1, 0, NULL);
 
 	/* declare resource table region */
 	rsc_table_get(&rsc_table, &rsc_size);
 	rsc_tab_physmap = (uintptr_t)rsc_table;
 
 	metal_io_init(rsc_io, rsc_table,
-		      &rsc_tab_physmap, rsc_size, -1, 0, NULL);
+		      &rsc_tab_physmap, rsc_size, NULL, -1, 0, NULL);
 
 	/* setup IPM */
 	if (!device_is_ready(ipm_handle)) {