hw/arm/fsl-imx8mp: Add on-chip RAM

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-id: 20250223114708.1780-18-shentey@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/fsl-imx8mp.c

@@ -644,6 +644,16 @@ static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->pcie_phy), 0,
                     fsl_imx8mp_memmap[FSL_IMX8MP_PCIE_PHY1].addr);
 
+    /* On-Chip RAM */
+    if (!memory_region_init_ram(&s->ocram, NULL, "imx8mp.ocram",
+                                fsl_imx8mp_memmap[FSL_IMX8MP_OCRAM].size,
+                                errp)) {
+        return;
+    }
+    memory_region_add_subregion(get_system_memory(),
+                                fsl_imx8mp_memmap[FSL_IMX8MP_OCRAM].addr,
+                                &s->ocram);
+
     /* Unimplemented devices */
     for (i = 0; i < ARRAY_SIZE(fsl_imx8mp_memmap); i++) {
         switch (i) {
@@ -655,6 +665,7 @@ static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
         case FSL_IMX8MP_ECSPI1 ... FSL_IMX8MP_ECSPI3:
         case FSL_IMX8MP_ENET1:
         case FSL_IMX8MP_I2C1 ... FSL_IMX8MP_I2C6:
+        case FSL_IMX8MP_OCRAM:
         case FSL_IMX8MP_PCIE1:
         case FSL_IMX8MP_PCIE_PHY1:
         case FSL_IMX8MP_RAM:

include/hw/arm/fsl-imx8mp.h

@@ -68,6 +68,7 @@ struct FslImx8mpState {
     DesignwarePCIEHost pcie;
     FslImx8mPciePhyState   pcie_phy;
     OrIRQState         gpt5_gpt6_irq;
+    MemoryRegion       ocram;
 
     uint32_t           phy_num;
     bool               phy_connected;