feat(rh850-u2a16): Add baremetal demo for RH850-U2A16

Signed-off-by: JensenWei007 <jensenwei007@gmail.com>

Author: JensenWei007

demos/baremetal/configs/rh850-u2a16.c

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+/**
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) Bao Project and Contributors. All rights reserved.
+ */
+
+#include <config.h>
+
+struct config config = {
+
+    CONFIG_HEADER
+
+    .vmlist_size = 1,
+
+    .vmlist = (struct vm_config[]){ 
+        {
+            .entry = 0x7F0000,
+            .image = VM_IMAGE_LOADED(0x7F0000,0x7F0000,0x10000),
+            .cpu_affinity = 0x1,
+
+            .platform = {
+                .cpu_num = 2,
+                .region_num = 2,
+                .regions =  (struct vm_mem_region[]) {
+                    // Code Flash (Bank A) -> Guest code
+                    {
+                        .base = 0x7F0000,
+                        .size = 0x10000
+                    },
+                    // Cluster0 RAM -> Guest Data
+                    {
+                        .base = 0xfe100000,
+                        .size = 0x80000
+                    }
+                },
+
+                .dev_num = 5,
+                .devs =  (struct vm_dev_region[]) {
+                    // Standby Controller
+                    {
+                        // 0xFF981000 -> 0xFF982000
+                        .id = 0,
+                        .pa = 0xFF981000,
+                        .va = 0xFF981000,
+                        .size = 0x1000,
+                        .interrupt_num = 0,
+                        .interrupts = NULL
+                    },
+                    // RLIN35
+                    {
+                        // 0xFFC7C100 -> 0xFFC7C140
+                        .id = 0,
+                        .pa = 0xFFC7C100,
+                        .va = 0xFFC7C100,
+                        .size = 0x40,
+                        .interrupt_num = 1,
+                        .interrupts = (irqid_t[]) {438}
+                    },
+                    // INTIF
+                    {
+                        // 0xFF090000 -> 0xFF090220
+                        .id = 0,
+                        .pa = 0xFF090000,
+                        .va = 0xFF090000,
+                        .size = 0x220,
+                        .interrupt_num = 0,
+                        .interrupts = NULL
+                    },
+                    // OSTM0
+                    {
+                        // 0xFFBF0000 -> 0xFFBF0100
+                        .id = 0,
+                        .pa = 0xFFBF0000,
+                        .va = 0xFFBF0000,
+                        .size = 0x100,
+                        .interrupt_num = 1,
+                        .interrupts = (irqid_t[]) {199}
+                    },
+                    // INTC1 (self)
+                    {
+                        // 0xFFFC0000 -> 0xFFFC4000
+                        .id = 0,
+                        .pa = 0xFFFC0000,
+                        .va = 0xFFFC0000,
+                        .size = 0x4000,
+                        .interrupt_num = 0,
+                        .interrupts = NULL
+                    }
+                },
+
+                // .arch = {
+                //     .intc = {
+                //         .intc1_base = 0xFFFC0000,
+                //         .intc2_base = 0xFFF80000,
+                //     },
+                //     .ibus = {
+                //         .barr_base = 0xFFFB8000,
+                //         .ipir_base = 0xFFFB9000
+                //     },
+                //     .bootctrl = {
+                //         .base = 0xFFFB2000
+                //     }
+                // },
+
+                .remio_dev_num = 0,
+                .remio_devs = NULL
+            }
+        }
+    }
+};

platforms/rh850-u2a16/README.md

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+# RH850-U2A16
+
+## 1) Download and install the gcc toolchain
+
+You can download and compile the toolchain from the official GCC repository.
+
+A toolchain that has been used and verified is [gcc 10.3.0](https://github.com/dkulacz/gcc-v850-elf-toolchain).
+
+
+## 2) Build bao.bin and baremetal.hex
+
+```sh
+# in bao-demos/
+make
+```
+
+The `bao.bin` and `baremetal.hex` is in `wrkdir/imgs/rh850-u2a16/baremetal`
+
+
+## 3) Flash bao.bin and baremetal.hex to board
+
+You can use a programming tool to program these two files onto the development board. 
+
+For example, on macOS, the steps are as follows:
+
+```sh
+./rfp-cli -d RH850/U2x -t e2 -if uart \
+-auth id FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF \
+-auto -osc 20.0 \
+-bin 0 bao.bin -p
+
+./rfp-cli -device RH850/U2x -tool e2 -if uart \
+-auth id FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF \
+-osc 20.0 \      
+-file baremetal.hex -p
+```

platforms/rh850-u2a16/make.mk

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+ARCH:=rh850
+
+platform: 
+	$(CROSS_COMPILE)objcopy -I binary -O ihex --change-addresses 0x7F0000 $(wrkdir_demo_imgs)/$(DEMO).bin $(wrkdir_demo_imgs)/$(DEMO).hex