add t-head smart-evb bsp, and risc-v cpu e906

Author: chenzx

bsp/thead-smart/.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 "$RTT_DIR/Kconfig"
+source "$PKGS_DIR/Kconfig"
+
+config SOC_THEAD_SMART
+    bool
+    select RT_USING_COMPONENTS_INIT
+    select RT_USING_USER_MAIN
+    default y
+
+if RT_USING_SERIAL
+
+    config RT_USING_UART1
+        bool "Using uart1"
+        default y 
+
+endif

bsp/thead-smart/Kconfig

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+# T-HEAD SMART-EVB Introduction
+SMART-EVB is a development board provided by T-HEAD, based on FPGA to provide implementation, integrating T-HEAD's RISC-V CPU (eg. E902/E906/C906) and C-SKY CPU (eg. E805/E804/E803/E802 ), integrates basic peripheral resources such as GPIO/TIMER/UART/RAM.
+
+##The main resources on board are as follows:
+1. SMART-EVB for E906/E906F/E906FD
+| res | description |
+| -- | -- |
+|ISA | RISCV |
+|CPU | E906  |
+|FREQ| 20MHz |
+|SRAM| 768KB |
+
+
+2. SMART-EVB for E804/E804F/E804D
+| res | description |
+| -- | -- |
+|ISA | C-SKY |
+|CPU | E804  |
+|FREQ| 20MHz |
+|SRAM| 768KB |
+
+
+# Compile T-HEAD BSP
+SMART-EVB BSP supports GCC compiler, the version information is:
+1. SMART-EVB for E906/E906F/E906FD
+| IDE/Compiler| version|
+| - | - |
+| GCC | gcc version 8.4.0 (C-SKY RISCV Tools V1.9.6 B20200616) |
+
+# run smart-evb bsp
+1. Connect JTAG
+2. Connect the serial port
+3. riscv64-unknown-elf-gdb rtthread-e906f.elf
+
+run log as follows:
+```
+ \ | /
+- RT -     Thread Operating System
+ / | \     4.0.3 build Sep  2 2020
+ 2006 - 2020 Copyright by rt-thread team
+msh >
+```
+
+
+

bsp/thead-smart/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/thead-smart/SConscript

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+import os
+import sys
+import rtconfig
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+from building import *
+
+TARGET = 'rtthread-' + rtconfig.CPU + '.' + rtconfig.TARGET_EXT
+
+env  = Environment(tools = ['mingw'],
+AS   = rtconfig.AS,   ASFLAGS   = rtconfig.AFLAGS,
+CC   = rtconfig.CC,   CCFLAGS   = rtconfig.CFLAGS,
+CXX  = rtconfig.CXX,  CXXFLAGS  = rtconfig.CXXFLAGS,
+AR   = rtconfig.AR,   ARFLAGS   = '-rc',
+LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+# add --start-group and --end-group for GNU GCC
+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, has_libcpu=False)
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/thead-smart/SConstruct

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+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+CPPPATH = GetCurrentDir()
+
+CCFLAGS = ' -c -ffunction-sections'
+
+group   = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH, CCFLAGS=CCFLAGS)
+
+Return('group')

bsp/thead-smart/applications/SConscript

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+/*
+ * Copyright (C) 2017-2019 Alibaba Group Holding Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-08-20     zx.chen      first version
+ */
+
+#include <rtthread.h>
+
+int main(void)
+{
+    
+    return 0;
+}
+
+/*@}*/

bsp/thead-smart/applications/main.c

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+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+
+# add the general drivers.
+src     = Glob("*.c") + Glob("*.cpp") + Glob("*.S")
+
+CPPPATH = [cwd]
+group   = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/thead-smart/drivers/SConscript

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+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-08-20     zx.chen      add T-HEAD header file csi_core.h
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include "board.h"
+#include "csi_core.h"
+#include "drv_usart.h"
+
+extern int __bss_end__;
+#define SYS_HEAP_BEGIN    (&__bss_end__)
+
+#include "core_rv32.h"
+
+
+extern usart_handle_t console_handle;
+extern void ioreuse_initial(void);
+
+
+/**
+ * This function will initial smartl-evb(e906) board.
+ */
+void rt_hw_board_init(void)
+{
+#ifdef RT_USING_COMPONENTS_INIT
+    rt_components_board_init();
+#endif
+    /* initialize hardware usart */
+    rt_hw_usart_init();
+
+#ifdef RT_USING_CONSOLE
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+#endif
+
+#ifdef RT_USING_HEAP
+    rt_system_heap_init((void *)SYS_HEAP_BEGIN, (void *)E906FD_IRAM_END);
+#endif
+}
+
+/*@}*/

bsp/thead-smart/drivers/board.c

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+/*
+ * Copyright (C) 2017-2019 Alibaba Group Holding Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-08-20     zx.chen      add E906 ram size
+ */
+
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+#define APB_DEFAULT_FREQ         20000000   /* Hz */
+#define E906FD_IRAM_SIZE         128
+#define E906FD_IRAM_END          (0x20000000 + E906FD_IRAM_SIZE * 1024)
+
+#endif /* __BOARD_H__ */