Rv64 qemu virt Support M-Mode

bsp/qemu-riscv-virt64/.config

@@ -213,6 +213,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
 # CONFIG_RT_USING_RYM is not set
 # CONFIG_RT_USING_ULOG is not set
 # CONFIG_RT_USING_UTEST is not set
+# CONFIG_RT_USING_RT_LINK is not set
 
 #
 # RT-Thread Utestcases
@@ -335,6 +336,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
 # CONFIG_PKG_USING_HELIX is not set
 # CONFIG_PKG_USING_AZUREGUIX is not set
 # CONFIG_PKG_USING_TOUCHGFX2RTT is not set
+# CONFIG_PKG_USING_NUEMWIN is not set
 
 #
 # tools packages
@@ -492,6 +494,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
 # CONFIG_PKG_USING_LIBNFC is not set
 # CONFIG_PKG_USING_MFOC is not set
 # CONFIG_PKG_USING_TMC51XX is not set
+# CONFIG_PKG_USING_TCA9534 is not set
 
 #
 # AI packages
@@ -519,6 +522,7 @@ CONFIG_RT_LIBC_FIXED_TIMEZONE=8
 # CONFIG_PKG_USING_FLEXIBLE_BUTTON is not set
 # CONFIG_PKG_USING_CANFESTIVAL is not set
 # CONFIG_PKG_USING_ZLIB is not set
+# CONFIG_PKG_USING_MINIZIP is not set
 # CONFIG_PKG_USING_DSTR is not set
 # CONFIG_PKG_USING_TINYFRAME is not set
 # CONFIG_PKG_USING_KENDRYTE_DEMO is not set
@@ -558,7 +562,8 @@ CONFIG_BOARD_virt=y
 CONFIG_RT_USING_USERSPACE=y
 
 #
-# General Purpose UARTs
+# RISCV qemu virt64 configs
 #
 # CONFIG_BSP_USING_UART1 is not set
+# CONFIG_RISCV_S_MODE is not set
 CONFIG___STACKSIZE__=16384

bsp/qemu-riscv-virt64/README.md

@@ -0,0 +1,136 @@
+# QEMU/RISCV64 VIRT板级支持包说明
+
+## 1. 简介
+
+RISC-V是一种开放和免费的指令集体系结构(ISA)。本工程是在QEMU的RISCV64 VIRT版本上进行的一份移植。
+
+## 2. 编译说明
+
+首先可以下载交叉编译工具链,建议采用sifive的工具链进行编译。
+```
+https://www.sifive.com/software
+```
+选择对应的平台即可。
+
+这里推荐在Ubuntu上进行开发工作。
+
+解压工具链到指定的目录。
+
+```
+export RTT_EXEC_PATH=~/gcc/bin
+```
+
+进入到`rt-thread/bsp/qemu-riscv-virt64`目录进行输入
+```
+scons
+```
+可以看到正常生成`rtthread.elf`与`rtthread.bin`文件。
+
+## 3. 执行
+
+本工程提供了riscv64的两种可配置运行模式,默认运行在M-Mode下。
+
+*M-Mode*
+
+首先安装`qemu-system-riscv64`。
+
+```
+sudo apt install qemu-system-misc
+```
+直接输入
+```
+./qemu-nographic.sh
+```
+可以看到程序运行
+
+```
+heap: [0x80035804 - 0x86435804]
+
+ \ | /
+- RT -     Thread Operating System
+ / | \     4.0.4 build May 21 2021
+ 2006 - 2021 Copyright by rt-thread team
+Hello RISC-V!
+msh />
+```
+
+*S-Mode*
+
+如果运行在S-Mode下，那么需要通过menuconfig选择配置
+
+```
+scons --menuconfig
+```
+选择如下：
+```
+RISCV qemu virt64 configs  ---> 
+    [*] RT-Thread run in riscv smode
+```
+保存后，重新`scons`编译即可。
+
+要让rt-thread运行在S-Mode，首先需要启动opensbi,然后通过opensbi启动rt-thread。
+
+自行编译的qemu或者下载的高版本的qemu内置opensbi，执行`./qemu-nographic-smode.sh`即可正常运行。
+
+通过`sudo apt install qemu-system-misc`安装的qemu版本较低，可自行编译opensbi。
+
+```
+git clone git@github.com:riscv/opensbi.git
+cd opensbi
+make PLATFORM=generic CROSS_COMPILE=~/gcc/bin/riscv64-unknown-elf-
+```
+最后生成的`/build/platform/generic/firmware/fw_jump.elf`则是需要的文件。
+
+输入以下的命令即可运行:
+
+```
+qemu-system-riscv64 -nographic -machine virt -m 256M -kernel rtthread.bin -bios ~/opensbi/build/platform/generic/firmware/fw_jump.elf
+```
+可以看到如下的结果
+```
+OpenSBI v0.9
+   ____                    _____ ____ _____
+  / __ \                  / ____|  _ \_   _|
+ | |  | |_ __   ___ _ __ | (___ | |_) || |
+ | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
+ | |__| | |_) |  __/ | | |____) | |_) || |_
+  \____/| .__/ \___|_| |_|_____/|____/_____|
+        | |
+        |_|
+
+Platform Name             : riscv-virtio,qemu
+Platform Features         : timer,mfdeleg
+.
+.
+.
+Boot HART ISA             : rv64imafdcsu
+Boot HART Features        : scounteren,mcounteren
+Boot HART PMP Count       : 16
+Boot HART PMP Granularity : 4
+Boot HART PMP Address Bits: 54
+Boot HART MHPM Count      : 0
+Boot HART MHPM Count      : 0
+Boot HART MIDELEG         : 0x0000000000000222
+Boot HART MEDELEG         : 0x000000000000b109
+heap: [0x80235a58 - 0x86635a58]
+
+ \ | /
+- RT -     Thread Operating System
+ / | \     4.0.4 build May 21 2021
+ 2006 - 2021 Copyright by rt-thread team
+Hello RISC-V!
+msh />
+```
+## 4. 支持情况
+
+| 驱动 | 支持情况  |  备注  |
+| ------ | ----  | :------:  |
+| UART | 支持 | UART0 |
+| PLIC | 支持 | - |
+| CLIC | 支持 | - |
+
+## 5. 联系人信息
+
+维护人：[bernard][1]
+
+[1]: https://github.com/BernardXiong

bsp/qemu-riscv-virt64/SConstruct

@@ -31,7 +31,11 @@ stack_size = 4096
 
 stack_lds = open('link_stacksize.lds', 'w')
 if GetDepend('__STACKSIZE__'): stack_size = GetDepend('__STACKSIZE__')
-stack_lds.write('__STACKSIZE__ = %d;' % stack_size)
+stack_lds.write('__STACKSIZE__ = %d;\r\n' % stack_size)
+if GetDepend('RISCV_S_MODE'):  start_addr = int(0x80200000) 
+else: start_addr = int(0x80000000)
+stack_lds.write('__START_ADDR__ = 0x%x;' % start_addr)
+
 stack_lds.close()
 
 # make a building

bsp/qemu-riscv-virt64/applications/main.c

@@ -1,10 +1,11 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
+ * 2021-05-20     bigmagic     first version
  */
 
 #include <rtthread.h>
@@ -14,9 +15,7 @@
 
 int main(void)
 {
-    void rt_hw_uart_start_rx_thread();
-    rt_hw_uart_start_rx_thread();
-    printf("Hello RISC-V\n");
+    printf("Hello RISC-V!\n");
 
     return 0;
 }

bsp/qemu-riscv-virt64/driver/Kconfig

@@ -1,6 +1,6 @@
 
 
-menu "General Purpose UARTs"
+menu "RISCV qemu virt64 configs"
 
 menuconfig BSP_USING_UART1
     bool "Enable UART1"
@@ -14,5 +14,8 @@ menuconfig BSP_USING_UART1
             default 21
     endif
 
-endmenu
+config RISCV_S_MODE
+    bool "RT-Thread run in riscv smode"
+    default y
 
+endmenu