Merge pull request #3504 from bigmagic123/add_ls2k_bsp

Add ls2k bsp

Author: BernardXiong

bsp/ls2kdev/.config

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+mainmenu "RT-Thread Configuration"
+
+config BSP_DIR
+    string
+    option env="BSP_ROOT"
+    default "."
+
+config RTT_DIR
+    string
+    option env="RTT_ROOT"
+    default "../.."
+
+# you can change the RTT_ROOT default "../.." to your rtthread_root,
+# example : default "F:/git_repositories/rt-thread"
+
+config PKGS_DIR
+    string
+    option env="PKGS_ROOT"
+    default "packages"
+
+source "$RTT_DIR/Kconfig"
+source "$RTT_DIR/libcpu/mips/common/Kconfig"
+source "$PKGS_DIR/Kconfig"
+
+config SOC_LS2K1000
+    bool
+    select ARCH_MIPS64
+    select RT_USING_COMPONENTS_INIT
+    select RT_USING_USER_MAIN
+    select RT_USING_DEVICE
+    default y
+    

bsp/ls2kdev/Kconfig

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+# loongson_pi2 板级支持包说明
+
+## 1. 简介
+
+2K龙芯派采是首款采用2K1000低功耗处理的嵌入式方案验证板，具有资源丰富、接口齐全、低功耗、高可靠的特点。
+
+| 硬件 | 描述 |
+| -- | -- |
+|芯片型号| 2K1000 |
+|CPU| GS264 |
+|主频| 1GHz |
+|DDR3| 2GB |
+|片外Flash| 8Mb SPI FLASH |
+
+[龙芯派][1]搭载 2K1000 处理器（主频 1GHz），板载 DDR3 颗粒，实现 DDR3 的运行存储功能。实现了 GPIO 的输入输出，中断功能。板上集成 1 个网 口，集成 3 个 USB 接口，HDMI 接口，LCD 接口，音频输入/输出，集成 SD 卡接口，集成 2 个 CAN 接口，集成 RTC 计时功能。可以外扩 WIFI 模块。2K 龙芯派可以广泛应用于信息安 全、电力、轨道交通、工业控制、信号处理、数据通信、信息教育等领域。
+
+
+## 2. 编译说明
+
+环境搭建在Ubuntu上进行，首先下载[mips-sde-elf-gcc][2]。该文件存放在网盘中，提取码为ucb2。
+
+解压到指定的目录，然后修改当前bsp目录下的`rtconfig.py`文件。
+
+```python
+if  CROSS_TOOL == 'gcc':
+	PLATFORM    = 'gcc'
+	EXEC_PATH   = "/opt/mips-2015.05-19-mips-sde-elf-i686-pc-linux-gnu/mips-2015.05/bin/"
+```
+
+然后在控制台输入`scons`即可，可以生成`rtthread.elf`、`rtthread.bin`文件，其中`rtthread.elf`是下载到开发板上的程序。
+
+## 3.程序运行
+
+rt-thread固件目前在龙芯派上推荐使用[pmon][3]通过tftp的方式下载到设备内存中运行。
+
+其中龙芯派硬件分布如下图所示：
+
+![loongsonpi](figures/loongsonpi.png)
+
+首先板子接上12V的电源，然后连接串口，该串口为RS232，所以需要RS232转USB线来进行连接。接着连接`LAN0`网口。
+
+初次上电时，需要按下开发板的`START`按键，听到`滴`启动声后可以在控制台看到串口打印信息。通过启动时在控制台不停的按下字符`c`直到进入到pmon控制台。
+
+
+
+需要让开发板和主机处于同一网段，利用pmon的tftp进行固件传输。首先查看主机的ip地址，如果`ifconfig`查看ip是`192.168.12.35`。输入以下指令开始运行。
+
+```
+ifaddr syn0 192.168.12.100 
+load tftp://192.168.12.35/rtthread.elf;
+g
+```
+
+其中`ifaddr`是设置pmon设置网络的命令，`syn0`表示第一个网卡。然后从tftp的主机上加载`rtthread.elf`文件，此时主机必须有tftp服务器。`g`表示程序跳转运行。
+
+而后可以看到rtthread程序正常的运行。
+
+```
+   zero      at       v0       v1       a0       a1       a2       a3   
+ 00000000 00000000 00000000 00000000 00000003 aafffea8 8f800000 8f1371d0
+    t0       t1       t2       t3       t4       t5       t6       t7   
+ 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+    s0       s1       s2       s3       s4       s5       s6       s7   
+ 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+    t8       t9       k0       k1       gp       sp       s8       ra   
+ 00000000 00000000 00000000 00000000 00000000 aafffe88 00000000 8f0b1418
+Current SR: 0x10008080
+
+ \ | /
+- RT -     Thread Operating System
+ / | \     4.0.3 build Apr  7 2020
+ 2006 - 2020 Copyright by rt-thread team
+Hi, this is RT-Thread!!
+msh >
+```
+
+## 4. 支持情况
+
+| 驱动 | 支持情况  |  备注  |
+| ------ | ----  | :------:  |
+| UART | 支持 | UART0|
+
+## 5. 联系人信息
+
+维护人：[bernard][4]
+
+[1]: http://ftp.loongnix.org/loongsonpi/pi_2/doc
+[2]: https://pan.baidu.com/s/17dbdOE4NAJ-qEW7drVRq2w
+[3]: http://ftp.loongnix.org/embedd/ls2k/
+[4]: https://github.com/BernardXiong

bsp/ls2kdev/README.md

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+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/ls2kdev/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
+
+rtconfig.AFLAGS += ' -I' + str(Dir('#'))
+
+DefaultEnvironment(tools=[])
+env = Environment(tools = ['mingw'],
+	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+	AR = rtconfig.AR, ARFLAGS = '-rc',
+	LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT)
+
+rtconfig.LFLAGS += " -Ttext 0xffffffff80200000"
+env.Replace(LINKFLAGS = rtconfig.LFLAGS)
+
+if GetDepend('RT_USING_FPU'):
+    env['CCFLAGS']   = env['CCFLAGS'].replace('-msoft-float', '-mhard-float')
+    env['ASFLAGS']   = env['ASFLAGS'].replace('-msoft-float', '-mhard-float')
+    env['CXXFLAGS']  = env['CXXFLAGS'].replace('-msoft-float', '-mhard-float')
+    env['LINKFLAGS'] = env['LINKFLAGS'].replace('-msoft-float', '-mhard-float')
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/ls2kdev/SConstruct

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+from building import *
+
+cwd     = GetCurrentDir()
+src	= Glob('*.c')
+
+group = DefineGroup('Applications', src, depend = [''])
+
+Return('group')

bsp/ls2kdev/applications/SConscript

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+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-04-05     bigmagic    first version
+ */
+
+#include <rtthread.h>
+
+int main(int argc, char** argv)
+{   
+    rt_kprintf("Hi, this is RT-Thread!!\n");
+    return 0;
+}

bsp/ls2kdev/applications/main.c

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+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c') + Glob('*.cpp') + Glob('*_gcc.S')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/ls2kdev/drivers/SConscript

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+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-04-05     bigmagic     Initial version
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+
+#include "mips_regs.h"
+#include "exception.h"
+#include "drv_uart.h"
+#include "board.h"
+/**
+ * this function will reset CPU
+ *
+ */
+void rt_hw_cpu_reset(void)
+{
+    rt_kprintf("reboot system...\n");
+    while (1);
+}
+
+/**
+ * this function will shutdown CPU
+ *
+ */
+void rt_hw_cpu_shutdown(void)
+{
+    rt_kprintf("shutdown...\n");
+
+    while (1);
+}
+
+
+/**
+ * This is the timer interrupt service routine.
+ */
+void rt_hw_timer_handler(void)
+{
+    unsigned int count;
+
+    count = read_c0_compare();
+    write_c0_compare(count);
+    write_c0_count(0);
+    /* increase a OS tick */
+    rt_tick_increase();
+}
+
+/**
+ * This function will initial OS timer
+ */
+void rt_hw_timer_init(void)
+{
+    write_c0_compare(CPU_HZ/2/RT_TICK_PER_SECOND);
+    write_c0_count(0);
+    mips_unmask_cpu_irq(7);
+}
+
+/**
+ * Board level initialization
+ */
+void rt_hw_board_init(void)
+{
+    rt_hw_exception_init();
+    /* init hardware interrupt */
+    rt_hw_interrupt_init();
+
+#ifdef RT_USING_FPU
+    /* init hardware fpu */
+    rt_hw_fpu_init();
+#endif
+
+#ifdef RT_USING_SERIAL
+    /* init hardware UART device */
+    rt_hw_uart_init();
+    /* set console device */
+    rt_console_set_device("uart");
+#endif
+
+#ifdef RT_USING_HEAP
+    rt_system_heap_init((void*)RT_HW_HEAP_BEGIN, (void*)RT_HW_HEAP_END);
+#endif
+
+    /* init operating system timer */
+    rt_hw_timer_init();
+    
+#ifdef RT_USING_COMPONENTS_INIT
+    rt_components_board_init();
+#endif
+
+    rt_kprintf("Current SR: 0x%08x\n", read_c0_status());
+
+}

bsp/ls2kdev/drivers/board.c

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+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-04-05     bigmagic     the first version
+ */
+
+#ifndef BOARD_H__
+#define BOARD_H__
+
+#include <stdint.h>
+
+extern unsigned char __bss_end;
+
+#define CPU_HZ	(100 * 1000 * 1000)
+#define RT_HW_HEAP_BEGIN    KSEG1BASE//(void*)&__bss_end
+#define RT_HW_HEAP_END      (void*)(RT_HW_HEAP_BEGIN + 64 * 1024 * 1024)
+
+void rt_hw_board_init(void);
+
+#endif