[rpi4b] add new bsp for qemu-rpi4b

Author: zhuzhuzhus

bsp/raspberry-pi/raspi-dm2.0/.config

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+mainmenu "RT-Thread Project Configuration"
+
+BSP_DIR := .
+
+RTT_DIR := ../../..
+
+PKGS_DIR := packages
+
+source "$(RTT_DIR)/Kconfig"
+osource "$PKGS_DIR/Kconfig"
+
+config BCM2711_SOC
+    bool
+    select ARCH_ARMV8
+    select ARCH_ARM_MMU
+    select RT_USING_CACHE
+    select RT_USING_COMPONENTS_INIT
+    select RT_USING_USER_MAIN
+    select ARCH_CPU_64BIT
+    default y
+
+rsource "drivers/Kconfig"

bsp/raspberry-pi/raspi-dm2.0/Kconfig

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+# Raspberry PI 4-dm2.0BSP说明
+
+## 1. 简介
+
+树莓派4B的核心处理器为博通BCM2711（四核1.5GHz，Cortex A72架构，树莓派3是四核A53）。LPDDR4内存，由5V/3A USB-C供电或GPIO 5V。
+
+外设支持上，引入了双频Wi-Fi，蓝牙5.0，千兆网卡，MIPI CSI相机接口，两个USB口，40个扩展帧。
+
+这份RT-Thread BSP是针对 Raspberry Pi 4的一份移植，树莓派价格便宜, 使用者甚众，是研究和运行RT-Thread的可选平台之一。
+
+
+## 2. 编译说明
+
+推荐使用[env工具](https://www.rt-thread.org/download.html#download-rt-thread-env-tool)，可以在console下进入到`bsp\raspberry-pi\raspi4-64`目录中，运行以下命令：
+
+```
+scons
+```
+
+来编译这个板级支持包。如果编译正确无误，会产生 `rtthread.elf`, `rtthread.bin` 文件。
+
+## 3. 支持情况
+
+| 驱动 | 支持情况  |  备注  |
+| ------ | ----  | :------:  |
+| UART | 支持 | pl011驱动 |
+| GPIO | 尚未支持 | 等待dm2.0相关代码合入主线 |
+| SPI | 尚未支持 | 等待gpio合入主线 |
+| WATCHDOG | 尚未支持 | 等待gpio合入主线 |
+| HDMI | 尚未支持 | 等待gpio合入主线 |
+| SDIO | 支持 | 能够正常运行在qemu，但是qemu对于raspi目前只支持pio传输，后续需要硬件进行详细测试 |
+| ETH | 尚未支持 | 等待gpio合入主线 |
+

bsp/raspberry-pi/raspi-dm2.0/README.md

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+# for module compiling
+import os
+from building import *
+
+cwd = GetCurrentDir()
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')

bsp/raspberry-pi/raspi-dm2.0/SConscript

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+import os
+import sys
+import rtconfig
+
+from rtconfig import RTT_ROOT
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+from building import *
+
+TARGET = 'rtthread.' + rtconfig.TARGET_EXT
+
+DefaultEnvironment(tools=[])
+env = Environment(tools = ['mingw'],
+    AS   = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+    CC   = rtconfig.CC, CFLAGS = rtconfig.CFLAGS,
+    CPP  = rtconfig.CPP, CXXFLAGS = rtconfig.CXXFLAGS,
+    AR   = rtconfig.AR, ARFLAGS = '-rc',
+    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+env['ASCOM'] = env['ASPPCOM']
+env['LINKCOM'] = '$LINK -o $TARGET $LINKFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS -Wl,--start-group $_LIBFLAGS -Wl,--end-group'
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT)
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/raspberry-pi/raspi-dm2.0/SConstruct

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+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd, str(Dir('#'))]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+list = os.listdir(cwd)
+for item in list:
+    if os.path.isfile(os.path.join(cwd, item, 'SConscript')):
+        group = group + SConscript(os.path.join(item, 'SConscript'))
+
+Return('group')

bsp/raspberry-pi/raspi-dm2.0/applications/SConscript

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+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+
+int main(int argc, char** argv)
+{
+    rt_kprintf("Hi, this is RT-Thread!!\n");
+    return 0;
+}

bsp/raspberry-pi/raspi-dm2.0/applications/main.c

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+
+
+menu "Hardware Drivers Config"
+     config BSP_USING_PL011
+        bool "Enable pl011 for uart"
+        default n
+
+    config BSP_USING_SDHCI
+        bool "Enable sdhci driver"
+        select RT_USING_SDHCI
+        default y
+    rsource sdhci/Kconfig
+endmenu

bsp/raspberry-pi/raspi-dm2.0/bcm2711-rpi-4-b.dtb

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+from building import *
+
+cwd     = GetCurrentDir()
+src     = ["board.c"]
+CPPPATH = [cwd, str(Dir('#'))]
+
+if GetDepend(['BSP_USING_PL011']):
+    src = src + ['drv_uart.c']
+
+if GetDepend(['BSP_USING_SDHCI']):
+    src = src + ['drv_sd.c']
+
+group = DefineGroup('driver', src, depend = [''], CPPPATH = CPPPATH)
+
+# build for sub-directory
+list = os.listdir(cwd)
+objs = []
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+group = group + objs
+
+Return('group')