https://github.com/weimingtom/wmt_mips_study

My MIPS study
https://github.com/weimingtom/wmt_mips_study

Last synced: about 1 month ago
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My MIPS study

Host: GitHub
URL: https://github.com/weimingtom/wmt_mips_study
Owner: weimingtom
Created: 2023-01-26T00:35:11.000Z (over 2 years ago)
Default Branch: master
Last Pushed: 2025-03-25T17:32:44.000Z (2 months ago)
Last Synced: 2025-04-15T02:47:28.494Z (about 1 month ago)
Size: 456 KB
Stars: 2
Watchers: 2
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md

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README

# wmt_mips_study
My MIPS study

## FPGA
* https://github.com/weimingtom/wmt_mips_study/blob/master/fpga_001.md
* (TODO) minimips32_v8_20221114_坑未处理.rar
* (TODO) quartus12_copy
* kianRiscV-tangnano20k_ulinux_soc.zip
* TangNano-20K-example-main.rar/nestang/nes.gprj
* (x) Gowin_V1.9.8.11_Education_win.zip
Gowin_V1.9.9Beta-4_Education_win.zip
Gowin_V1.9.9_x64_win.zip
* nestang_install.7z/TangNano-20K-example-main_mod.7z

## TODO
* (TODO) PS2 Linux, with rpms gcc2 and gtk+-1, initrd, kernel, etc...
* PS2, PSP emulator
* (IMP) Compile mingw mips cross gcc version 2
* (IMP) https://github.com/ljkgpxs/virtualnoah
* (IMP) https://github.com/OpenNoah/virtualnoah
* (IMP) gxemul for godson 1 and 2 and mips
* (IMP) skyeye and skyeye testcases for godson and mips
* naken_asm
* gcc -S for qtspim ((IMP) can see Simulizer-0.43-beta/gcc-mips.sh how to process gcc output)
* (**IMP, IMP, IMP**) see https://github.com/weimingtom/wmt_ai_study/blob/master/fpga_cpld_001.md
* openwrt & buildroot
* golang or rust baremetal / bare, simulator (emulator), compiler, etc
* (IMP) ucosii
* (IMP) Simulizer-0.43-beta
* u-boot qemu
* freertos, https://github.com/lengdongwl/Ls1bTest
https://github.com/mugenZebra/UNO32-freeRTOS-port
* u-boot for ls232,
https://github.com/deepke/u-boot-mips
https://github.com/gnaygnil/ls1c_robot_uboot
* uno32
https://github.com/rkujawa/chipKIT-minimal-application
https://github.com/chipKIT32/PIC32-avrdude-bootloader
* https://github.com/NJU-ProjectN/nemu
(risc-v) https://github.com/OpenXiangShan/NEMU
see https://www.bilibili.com/video/BV1Zb4y1k7RJ/
* https://github.com/cyyself/cemu
* (see cemu) https://github.com/z4yx/ucore-thumips/tree/for-ls232-soc_up
* (TODO) https://github.com/grantae/mips32r1_xum/tree/master/Software/demos/XD1_Hello/src/os
* https://github.com/evosynth/led_flash_wi-fire
* 数字设计和计算机体系结构, MIPSfpga
* DDCA2e_HDL_03-11-2015.zip
07-mipssingle.sv, From Section 7.6 of Digital Design & Computer Architecture
07-mipsmulti.sv
* DDCA_Labs_companion.zip
Lab 9: MIPS Single-Cycle Processor
Lab 10: Multicycle Processor (Part 1)
Lab 11: Multicycle Processor (Part 2)
* MIPS Embedded OS (MEOS)
* (TODO) https://github.com/yajin/jz-hacking/blob/master/wiki/qemujz.wiki
(TODO) how to run this qemu-JZ ????
see https://code.google.com/archive/p/jz-hacking/wikis/qemujz.wiki
* (TODO) http://git.ingenic.com.cn:8082/bj/repo
* (TODO) https://www.ymcn.org/search.php?keyword=jz4740&cateid=0&sort=&sortby=&sm=0&page=5
* 龙芯 and arm
```
romfs
YC-ZXID-YX-V2001.img
见qq邮箱
romfser-master
uclinux

https://blog.csdn.net/qq_30135687/article/details/130288776?spm=1001.2014.3001.5502
https://blog.csdn.net/qq_30135687?type=blog
https://blog.csdn.net/qq_30135687/article/details/130410801?spm=1001.2014.3001.5502
http://ftp.loongnix.cn/embedd/ls1b/

ARM7模拟器for linux
SimIt-ARM.rar
https://sourceforge.net/projects/simit-arm/
## SimIt-ARM, with C++, ARM7, provide sa1100 and colibri linux images in sourceforge, like skyeye
* https://sourceforge.net/projects/simit-arm/
* https://github.com/dmlockhart/simit-arm

https://github.com/nihcdsv/nihao

平衡车
https://gitee.com/weidongshan/100ask_r128_demos
https://www.bilibili.com/video/BV1Fg4y197Vh/?spm_id_from=333.337.search-card.all.click&vd_source=8aac237d3ed1fe24370f8df03ab1993d

gxemul运行不了龙芯，可能需要自己编译lemote_2f
linux-3.10.tar.gz\linux-3.10\arch\mips\configs - TAR+GZIP 压缩文件, 解包大小为 1,341,937,926 字节
lemote2f_defconfig
http://ftp.loongnix.cn/embedd/ls1a500/linux-3.10.tar.gz

基于龙芯1C智龙开发板的龙芯嵌入式开发入门教程
https://www.bilibili.com/video/BV1Zt411U7pW/?spm_id_from=333.999.0.0&vd_source=8aac237d3ed1fe24370f8df03ab1993d
```

## (TODO) csdn todo:
* (TODO) gxemul-0.4.3_可以仿真龙芯处理器的模拟器Godson
* (TODO) MIPS-OS从JOS移植的具有用于MIPS R3000的Shell的定制操作系统
* https://github.com/BXYMartin/MIPS-OS

## TODO, gcc -S, asm volatile, for QtSpim
* (TODO) (IMP) use gcc-2.95.3 cross mips to gcc hello.c -S -mno-explicit-relocs, need comment jal __ main, why ???
```
jal __main
```
* https://blog.csdn.net/yt_42370304/article/details/84982864
* use "r" instead of "m" ???
```
asm volatile(
"add $a0, $zero, %0;"
"addi $v0, $zero, 4;"
"syscall;"
:
:"m" ("The sum from 0 .. 100 is "));
```
* use la ???, instead %lo() and %hi(), see -mno-explicit-relocs (high version gcc not support ???)
```
la $3, $LC0
add $a0, $zero, $3
addi $v0, $zero, 4
syscall;
```
* E:\android-ndk-r10e\toolchains\mips64el-linux-android-4.9\prebuilt\windows\bin\mips64el-linux-android-gcc -march=r3000 -g0 -s hello.c -S
* https://blog.csdn.net/weixin_40751723/article/details/120295374
* https://github.com/shihyu/Qemu.git
* https://github.com/EduRenesto/indy/blob/ae9485e8b8731a223b3c153280d798808836b7d5/res/extra/90.simple.c
* https://github.com/asherShores5/CompilerButBad/blob/d6a73cdd1c97bb9436cfd1bf78357f1510f9b689/MIPScode.h
* https://github.com/search?l=C&q=syscall+4+print_str+mips&type=Code
* 安装mips编译器和模拟器/mips GCC编译环境搭建
* mips-sde-elf-gcc example.c -S -mno-explicit-relocs
* https://blog.csdn.net/wfxzf/article/details/88974144

## barebone hello, for qemu -machine mipssim
* Jun Sun's Linux MIPS Porting Guide
* http://web.archive.org/web/20160322170852/http://linux.junsun.net/porting-howto/
* barebone_v1_success_mipssim_ubuntu140432_sde.tar.gz
```
#LOADADDR = 0xa0040000
LOADADDR = 0x81000000
RAMSIZE = 0x00100000 # 1MB
# or 0x1000 # 4k

CC = $(CROSS_COMPILE)gcc -EL -fno-builtin
LD = $(CROSS_COMPILE)ld -EL
```
```
//#define BASE 0xb0000080
#define BASE 0xbfd003f8
//mips: 0xb4000000;
//mipssim: 0xbfd00000;
//#define UART0_ISA_OFF 0x3f8
```
* https://gitee.com/caogos/qemu_gdb_mips_hello
* qemu_gdb_mips_hello-master_v1_ubuntu140432_sde.tar.gz
* https://github.com/petersho/qemu-mips-hello

## doc
* https://github.com/grantae/mips32r1_xum/tree/master/Documentation/MIPS
* https://pages.cs.wisc.edu/~larus/HP_AppA.pdf

## mips linux (vmlinux), for qemu -machine mipssim (and for -machine mips)
* https://cdn.kernel.org/pub/linux/kernel/v3.x/linux-3.5.7.tar.gz
* mips-2015.05-19-mips-sde-elf-i686-pc-linux-gnu.tar.bz2
* https://www.linux-mips.org/wiki/Porting
* https://www.linux-mips.org/wiki/Kernel_Build
* https://www.linux-mips.org/wiki/MIPSsim
* https://www.linux-mips.org/wiki/Emulators
* linux-2.x maybe ok
* https://github.com/kholia/mips-hacking
* vmlinux_ubuntu140432_v4.rar, readme_ubuntu140432_v4.txt
```
----
xubuntu200464

$ cd busybox-1.20.2
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- defconfig
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- menuconfig
Build Options--->Build BusyBox as a static binary(no shared libs)
Login/Password Management Utilities--->passwd(uncheck)
Miscellaneous Utilities--->time(uncheck)
Networking Utilities--->inetd(uncheck)ntpd(uncheck)
Runit Utilities--->all(uncheck)
#if 0 to shell/shell_common.c printlim inside
#if 0 to shell/shell_common.c shell_builtin_unlimit(char **argv) inside

https://github.com/fdu/STM32F429I-disco_Buildroot/issues/1
Init Utilities--->init->Support reading an inittab file(uncheck)
comment_ strings (tty2...4) in file nit/init.c
/*new_init_action(ASKFIRST, bb_default_login_shell, VC_2);
new_init_action(ASKFIRST, bb_default_login_shell, VC_3);
new_init_action(ASKFIRST, bb_default_login_shell, VC_4);*/

$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu-
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- install
$ tar czf install.tar.gz _install/

-------------
ubuntu140432

$ tar xzf install.tar.gz
$ cd _install
$ mkdir -p proc sys dev etc etc/init.d
$ gedit ./etc/init.d/rcS
#!/bin/sh
mount -t proc none /proc
mount -t sysfs none /sys
/sbin/mdev -s
ifconfig lo up
ifconfig eth0 10.0.2.15 netmask 255.255.255.0
route add default gw 10.0.2.1
$ chmod +x ./etc/init.d/rcS
$ cp etc/init.d/rcS rcS
$ cd /dev
$ sudo mknod -m 660 console c 5 1
$ sudo mknod -m 660 null c 1 3

$ cd ../linux-3.5.7/
$ make ARCH=mips CROSS_COMPILE=/home/wmt/work_xv6_mips/mips-2015.05/bin/mips-sde-elf- menuconfig
General setup--->Initramfs source file(s): /home/wmt/work_mips_linux/_install/
Kernel hacking--->root=/dev/ram rdinit=/linuxrc init=/linuxrc
$ make ARCH=mips CROSS_COMPILE=/home/wmt/work_xv6_mips/mips-2015.05/bin/mips-sde-elf-

$ qemu-system-mipsel -M mipssim -kernel vmlinux -nographic
------------------
can't open /dev/tty2: No such file or directory
can't open /dev/tty3: No such file or directory
can't open /dev/tty4: No such file or directory
see https://github.com/fdu/STM32F429I-disco_Buildroot/issues/1
```

## loongson linux (vmlinux), ls1b defconfig, linux-2.6.3, 4.19, 5.3, for qemu (need src mod) -machine ls1b
* https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.2.tar.gz
* https://gitee.com/loongsonlab/qemu
* https://gitee.com/loongsonlab/loongson
* see loongsonlab/loongson, for some prebuilt firmware, for example, initrd and vmlinux / vmlinuxz (without pmon)
* https://github.com/tinyclub/qemu-mipsel-ls232
* https://gitee.com/loongsonlab/linux-2.6.32
* loongson_mod_v2_self_build_linux.tar.gz, not through pmon
* NOTE: need to add 115200 to vmlinux boot command line:
```
root=/dev/ram console=ttyS0,115200 rdinit=/linuxrc
```
* how to build busybox and linux 5.2
```
xubuntu200464
sudo apt install gcc-mipsel-linux-gnu
```
```
xubuntu200464

$ cd busybox-1.20.2
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- defconfig
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- menuconfig
Build Options--->Build BusyBox as a static binary(no shared libs)
Login/Password Management Utilities--->passwd(uncheck)
Miscellaneous Utilities--->time(uncheck)
Networking Utilities--->inetd(uncheck)ntpd(uncheck)
Runit Utilities--->all(uncheck)
* Then, (modify shell/shell_common.c) put '#if 0.. #endif' to shell/shell_common.c's
printlim() inside, comment inside code
* Then, (modify shell/shell_common.c) put '#if 0.. #endif' to shell/shell_common.c's
shell_builtin_unlimit(char **argv) inside, comment inside code

* see https://github.com/fdu/STM32F429I-disco_Buildroot/issues/1
Init Utilities--->init->Support reading an inittab file(uncheck)
* Then (modify nit/init.c, put /*...*/ inside) comment strings (tty2...4) in file nit/init.c, like this:
/*new_init_action(ASKFIRST, bb_default_login_shell, VC_2);
new_init_action(ASKFIRST, bb_default_login_shell, VC_3);
new_init_action(ASKFIRST, bb_default_login_shell, VC_4);*/

$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu-
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- install
```
```
（for busybox）

$ cd _install
$ mkdir -p proc sys dev etc etc/init.d
$ gedit ./etc/init.d/rcS
#!/bin/sh
mount -t proc none /proc
mount -t sysfs none /sys
/sbin/mdev -s
ifconfig lo up
ifconfig eth0 10.0.2.15 netmask 255.255.255.0
route add default gw 10.0.2.1
$ chmod +x ./etc/init.d/rcS
$ cp etc/init.d/rcS rcS
$ cd /dev
$ sudo mknod -m 660 console c 5 1
$ sudo mknod -m 660 null c 1 3
```
```
（for linux）

$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- loongson1b_defconfig
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- menuconfig
General setup--> Initial RAM filesystem and RAM disk (check)
Initramfs source file(s): /home/wmt/work_loongson/_install/
kernel hacking--->Built-in kernel command line
(x) default string: root=/dev/ram console=ttyS0 rdinit=/linuxrc init=/linuxrc
default string: root=/dev/ram console=ttyS0,115200 rdinit=/linuxrc
$ make ARCH=mips CROSS_COMPILE=mipsel-linux-gnu-
```
* 嵌入式Linux系统设计及应用-基于国产龙芯SOC3.1.0
* https://mirrors.ustc.edu.cn/loongson/loongson1b/
* https://mirrors.ustc.edu.cn/loongson/loongson1c_bsp/
* https://github.com/z4yx/ucore-thumips/tree/for-ls232-soc_up
* Buildroot 龙芯1C支持指南
https://www.cnblogs.com/zzb-Dream-90Time/p/7111612.html
* https://github.com/sundm75/Loongson-Smartloong-V3.0-RTT
* https://files.loonglab.cn:8000
* http://www.openloongson.org/
* https://www.bjlx.org.cn
* https://github.com/KianWeng/loongson-ejtag
* https://gitee.com/loongarch_community/Loongson-1c300b-OpenHarmony
* https://github.com/loongson-gz/qemu
* https://github.com/loongson-gz/ls1b-linux-3.18
* https://github.com/loongson-gz/loongson_1b_ejtag
* https://github.com/loongson-gz/loongson_1b_toolchain
* https://github.com/loongson-gz/loongson_1b_linux_2.6.21.5
* https://github.com/Red54/loongson1-linux-3.5
* https://github.com/sundm75/Loongson-Smartloong-V2.0
* 用“芯”探核: https://github.com/chenhuacai/linux-ulek

## pmon (a bootloader for loongson) for loongson (here not boot vmlinux), for qemu (need src mod）-machine ls1b
* https://mirrors.ustc.edu.cn/loongson/
* https://gitee.com/brep/loongson1-pmon
* https://gitee.com/loongsonlab/qemu
* work_pmon.tar.gz
* https://blog.csdn.net/u012101272/article/details/123578005
* www.douban.com/note/184920595/
* https://gitee.com/CaesarKarry/embedded_godson_1c300b
* https://sites.google.com/site/kontais/gxemul, gxemul-0.4.3.godson.tar.gz, only for loongson2 64bit, not good
* https://github.com/lshw/loongson1-pmon
* https://github.com/loongson-gz/loongson_1b_pmon
* https://github.com/loongson-gz/pmon-ls1x
* build method:
qemu: https://gitee.com/loongsonlab/qemu
pmon: loongson1-pmon (from https://gitee.com/brep/loongson1-pmon ?)
```
xubuntu 200464
prepare, see https://github.com/sergev/qemu/wiki
$ sudo apt-get install libpixman-1-dev libfdt-dev zlib1g-dev libglib2.0-dev libsdl-dev
see (IMP) qemu loongson build mothod!!!!
see (IMP) pmon loongson build mothod!!!!
```
```
(build qemu source mod for ls1b)
$ git clone https://gitee.com/loongsonlab/qemu
$ cd qemu
$ mkdir build2
$ cd build2
$ ../configure --target-list=mipsel-softmmu --disable-werror --prefix=/home/wmt/work_pmon/qemu_pmon2
$ make
$ make install
```
```
(build pmon for ls1b)
$ cd ../../loongson1-pmon
$ ./build_ls1b_dev.sh
(get pmon_ls1b_dev.bin)
```
* run method:
```
$ cd qemu_pmon2/bin
$ SERIAL=2 ./qemu-system-mipsel -M ls1b -serial stdio -bios pmon_ls1b_dev.bin
```
* https://github.com/weimingtom/loongson1-pmon_fork
* https://github.com/weimingtom/qemu_pmon_fork
* (not good) 龙芯杯无开发板如何开发和调试linux
https://blog.mxdon.cool/2021/无开发板如何开发linux系统内核/

## xv6-mips, for qemu -machine mips (and -machine mipssim is ok, need modification)
* https://github.com/varmil/xv6-mips
* (not good) https://github.com/nullpo-head/xv6-mips
* xv6-mips-new_from_varmil_success_no_some_seconds_crash.tar.gz
* https://github.com/SKT-CPUOS/xv6-loongarch-exp

## ucore, ucore-thumips (and for qemu -machine mipssim?)
* https://github.com/Lan1keA/BIT-ucore_mips
ucore_v3_success_from_Lan1keA_BIT-ucore_mips-master.tar.gz
qemu-system-mipsel -M mipssim -m 32M -kernel ucore-kernel-initrd_2
* https://github.com/chyyuu/ucore_os_plus/tree/clang-dev
* https://github.com/chyh1990/ucore-thumips
* https://github.com/chyh1990/qemu-thumips
* https://github.com/Lan1keA/ucore-mips-with-comment
* 基于龙芯FPGA开发板的计算机系统综合实验
https://github.com/oscourse-tsinghua/LoongsonCsprj2017-manual
https://oscourse-tsinghua.gitbook.io/loongsoncsprj2020-manual/ucore
* https://www.bookstack.cn/read/simple_os_book/README.md
* uCore OS实验指导书和源码网址 (2020)
https://github.com/chyyuu/ucore_os_docs
* ucore实验指导书
https://chyyuu.gitbooks.io/ucore_os_docs/content/
ucore labs 1-8 源码和参考答案
https://github.com/chyyuu/ucore_lab
os tutorial lab
https://github.com/chyyuu/os_tutorial_lab
* https://github.com/z4yx/ucore-thumips/tree/for-ls232-soc_up

## hos-mips, based on Tsinghua ucore OS, can run with gxemul 0.6.1 mod
* https://github.com/MrShawCode/hos-mips/tree/gxemul
* https://github.com/klx3300/gxemul-hos
see https://github.com/MrShawCode/hos-mips/blob/gxemul/gxemul_run.sh
gxemul -E oldtestmips -C R6000 -M 512 obj/kernel/ucore-kernel-initrd
work_hos_v1.tar.gz

## rt-thread 20201229, for qemu -machine mipssim
* rt-thread_back_to_202012291854_min.zip
* Neweast version may crash
* https://gitee.com/rtthread/rt-thread
* https://blog.csdn.net/u014689277/article/details/121490983
* LOONGSON派二代 RTthread

## Topsy, for mipseb, run on Java Simulator (MipsSimulator)
* https://github.com/pahihu/Topsy
* https://github.com/pahihu/MipsSimulator
* Topsy-master_v5_xu_success2.tar.gz
* Topsy-master_v5_xu_success2_MipsSimulator2.7z
* http://web.archive.org/web/20041010204139/http://www.tik.ee.ethz.ch/~topsy/index.html
* http://web.archive.org/web/20041012105224/http://www.tik.ee.ethz.ch/~gfa/MipsSim.html
* https://www.rose-hulman.edu/Class/se/csse490/cs490-csa/project/os/
* https://www.rose-hulman.edu/Class/se/csse490/cs490-csa/project/os/topsy.srec
* https://github.com/pahihu/Topsy/blob/master/User/link.scr
* need to mod User/link.scr, add 0x80040000 offset to every segment !!!
```
.rodata . : AT( 0x80040000 + ADDR(.rodata) )
.data . : AT( 0x80040000 + ADDR(.data) )
.sbss . : AT( 0x80040000 + ADDR(.sbss) )
.bss . : AT( 0x80040000 + ADDR(.bss) )
/* make 0x80040000 offset to every segment */
```
* (TODO) https://github.com/drh/lcc

## BUAA-OS, run on gxemul
* https://github.com/login256/BUAA-OS-2019/tree/lab6
* Need to add -d fs.img to run.bash or gxemul command line
* https://github.com/login256/BUAA-OS-2019/tree/master
* https://github.com/fmars/MIPS_OS_Kernel
* login256_BUAA-OS-2019-lab6_run_success.tar.gz
* https://github.com/rfhits/Operating-System-BUAA-2021
* https://github.com/Niupple/BUAA-OS-Niupple
* https://github.com/refkxh/BUAA_OS_2020Spring
* https://github.com/Coekjan/SOMOS

## xinu, for qemu mipsel -machine mips (mipssim not work)
* https://github.com/xinu-os/xinu
* cd compile; make
* https://xinu.cs.mu.edu
* xinu-master_v4_xubuntu_mips_success.tar.gz
* (TODO) http://www.mscs.mu.edu/~brylow/xinu/
* (OLD) xinu_mips-latest.tgz, xinu_mips-latest.tar.bz2
* (NEW) xinu-master.zip
* wrt54gl, wrt160nl, (new) wl330ge, e2100l, arm rpi
* 操作系统设计:Xinu方法
* 《操作系统设计：xinu方法》实验环境的搭建
* https://blog.csdn.net/cang_xing/article/details/79166001
* https://www.cs.purdue.edu/homes/comer/
* https://uclibc.org/downloads/binaries/0.9.30.1/cross-compiler-mips.tar.bz2
* (dead) http://xinu.cs.purdue.edu/files/Xinu-code-MIPS.tar.gz
* https://github.com/robert-w-gries/rxinu
* https://xinu.cs.purdue.edu
* https://www.cs.purdue.edu/homes/comer/downloads/Xinu_Book_And_Code/other/Older_Versions/Xinu-code-MIPS.tar.gz
* https://github.com/robinkrens/xinu-for-stm32
* https://github.com/jarrocha/XinuBBB
* https://github.com/9MMMinor/avrXinu-V7
* http://se.fi.uncoma.edu.ar/xinu-avr/
* https://github.com/zrafa/xinu-avr

## os161, running on C simulator (sys161, for mipseb)
* http://www.os161.org
* https://student.cs.uwaterloo.ca/~cs350/common/Install161NonCS.html
* https://student.cs.uwaterloo.ca/~cs350/common/OS161main-S07.html
* https://student.cs.uwaterloo.ca/~cs350/common/Install161.html
* https://student.cs.uwaterloo.ca/~cs350/common/WorkingWith161.html
* work_os162_v1_success_some.tar.gz

## (TODO) loongson / godson fpga
* https://github.com/huitailangyz/B0911009Y-Computer-Architecture-Lab
* https://github.com/poorjobless/cpu_gs232

## (TODO) naken_asm
* https://www.mikekohn.net/micro/naken_asm.php
* https://github.com/mikeakohn/naken_asm

## (TODO) qtspim
* https://pages.cs.wisc.edu/~larus/HP_AppA.pdf
* https://sourceforge.net/p/spimsimulator/code/HEAD/tree/
* https://pages.cs.wisc.edu/~larus/spim.html
* https://ecs-network.serv.pacific.edu/past-courses/2012-fall-ecpe-170/tutorials/qtspim-tutorial
* QtSpim的数据段代码段可能是某种古老r3000机器的布局，但似乎也兼容mips32。我以前以为设置中的异常处理器是
打开一个程序，其实是用来替换内置的boot汇编文件，或者不使用boot代码：
* 可以加载多个.s汇编文件，会连接加载到同一个text段内，接在上一个的末尾。但不能批量添加，
需要手工逐个加。所以加载汇编文件的菜单操作其实相当于接在内置异常处理器的.text段代码后面。
* 汇编文件中.text的起始地址（例如.text 0x400000）参数只允许一定规则的偏移，例如只能40_0080
* 汇编文件中.text和.ktext必须在text段和ktext段范围内，例如40_0000至44_0000之间。这个范围似乎是固定的
* 设置中的异常处理器就是ktext段bootloader的代码（详细见spimsimulator源代码仓库中的exceptions.s，
可以在sf的仓库中看到qtspim的源码）
* 如果去掉异常处理器前面的勾，然后重启qtspim，或者菜单Reinitial Simulator，8000_0000的代码会清空。
也可以自己参照exceptions.s的代码替换自己的boot汇编
* 实际上设置中关闭内置的异常处理器汇编（去除勾），也可以正常运行汇编。可以通过菜单中Run Parameter
修改运行的起始地址，默认是40_0000。对运行的影响比较少，仍然可以syscall，只是运行到最后可能会报错，或者用单步运行
* 有时候菜单Reinitial Simulator也会出问题，导致加载汇编文件失败。最好是重启exe
* 我觉得设置中的bare machine按钮没什么用，似乎无法修改段的起始地址的规定范围，几乎总是用simple machine就可以了

## retrobsd
* https://github.com/RetroBSD/retrobsd
* (work) ubuntu 140432, work_retrobsd_v1_success.tar.gz
with mips-2013.11-37-mips-sde-elf-i686-pc-linux-gnu.tar.bz2
* https://github.com/RetroBSD/retrobsd/releases/tag/tools
* https://github.com/RetroBSD/retrobsd-early

## retrobsd qemu
* sergev/qemu模拟retrobsd的问题解决了。为什么无法加载到sdcard，是因为qemu代码中（对应max32开发板）的
sdcard针脚设置和unix.hex里面的sdcard针脚不同，改一下就可以了（把qemu代码中的片选脚改成D4，从输出信息中可以看到）。
不过这个qemu似乎无法运行最新版的retrobsd，但我试验过编译旧版的retrobsd是可以运行的
* https://github.com/sergev/qemu/wiki/RetroBSD-Example
* work_retrobsd_qemu_v2_success_old_rom.tar.gz
* work_retrobsd_qemu_v3_build_retrobsd_and_run.tar.gz
* https://github.com/sergev/qemu/blob/master/hw/mips/mips_pic32mx7.c, search BOARD_MAX32
**need to change to D4 and SPI4**
```
s->sdcard_spi_port = 3;/*1;*/ // SD card at SPI2,
cs0_port = 3;/*2;*/ cs0_pin = 3;/*14;*/ // select0 at C14,
cs1_port = -1;/*3;*/ cs1_pin = -1;/*1;*/ // select1 at D1
```
* need build old version retrobsd, before 2015-01-10
unix_build.hex is from ./sys/pic32/max32/unix.hex, sdcard_build.img is from ./sdcard.img
https://github.com/RetroBSD/retrobsd/tree/8e228dde62b2121e11e8182aca51ad7fc1f1c722
```
/home/wmt/work_retrobsd_qemu/qemu-mips/bin/qemu-system-mipsel
-machine pic32mx7-max32 -serial stdio -bios boot-max32.hex
-kernel unix_build.hex -sd sdcard_build.img
```
* login: root, password: none

## litebsd
* https://github.com/sergev/LiteBSD
* https://github.com/zyy0721/Minisys-OS/blob/master/boot/boot.S
* https://github.com/sergev/LiteBSD/releases/tag/tools
* gcc-4.8.1-mips-linux.tgz
* https://github.com/sergev/LiteBSD/wiki/ELF-toolchain
* https://github.com/sergev/LiteBSD/wiki/chipKIT-WiFire-board
*
## (TODO) virtualmips
* https://code.google.com/archive/p/virtualmips
* https://github.com/RetroBSD/retrobsd/tree/master/tools/virtualmips
* virtualmips-0.01_run_success_need_libelf-dev.tar.gz

## v6pic32
* https://codeberg.org/zerocool32/v6pic32

## nachos
* https://homes.cs.washington.edu/~tom/nachos/

## uclinux on psp 0.22
* psplinux, tested on real machine (for example PSP2000), but ppsspp and jpcsp not work
* uclinux_on_psp-0.22.zip
* https://sites.google.com/site/jacksonm88/
* https://sites.google.com/site/linuxonpspproject/
* https://sites.google.com/site/wwwjalinux/linuxonpsp.htm

## qemu-mt7628
* https://github.com/newluhux/qemu-mt7628

## (TODO) openwrt mips, for qemu -machine malta
* https://github.com/cclinuxer/openwrt/blob/master/target/linux/malta/README
* https://cclinuxer.gitee.io/2021/01/OpenWrt进行qemu模拟/
* https://github.com/openwrt/openwrt/blob/master/target/linux/malta/README

## (TODO) buildroot mips, for qemu -machine malta
* https://github.com/buildroot/buildroot/blob/master/board/qemu/mips32r2el-malta/readme.txt
* https://github.com/buildroot/buildroot/blob/master/configs/qemu_mips32r2el_malta_defconfig

## rcore, Rust version of THU uCore OS Plus
* https://github.com/rcore-os/rCore

## virtualnoah, NP1100, JZ4740, qemu-NP_120730
* https://github.com/ljkgpxs/virtualnoah
* https://github.com/OpenNoah/virtualnoah
* https://github.com/OpenNoahEdu/virtualnoah

## skyeye, for mips au1100 and gs32eb1
* skyeye-1.3.5_rc1.tar.bz2
* skyeye-testsuite-1.3.4_rc1.tar.gz
* skyeye-testsuite-1.3.4_rc1\skyeye-testsuite\dyncom\hello-mips
* skyeye-testsuite-1.3.4_rc1\skyeye-testsuite\dyncom\hello_gs32eb1

## PIC32 Architecture and Programming
* https://johnloomis.org/microchip/pic32/resources.html

## chipkit uno32
* https://github.com/chipKIT32/PIC32-avrdude-bootloader
* https://github.com/chipKIT32/chipKIT-digiboot
* https://github.com/Microchip-MPLAB-Harmony/core_apps_pic32mx

## pinguino32, PIC32
* https://code.google.com/archive/p/pinguino32/downloads

## crosstool-ng
* https://code.lardcave.net/2015/02/10/1/
```
$ ct-ng mips-unknown-elf
$ ct-ng menuconfig
$ ct-ng build
```

## (TODO) mips32r1_xum, verilog and bare program
* https://github.com/grantae/mips32r1_xum

## (TODO) armadillo
* https://github.com/ulfsigvardsson/armadillo

## CS3650_MIPS32ALU
* https://github.com/greyqwilson/MIPS32Processor_PreOwned
* https://electrobinary.blogspot.com/2021/02/alu-design-in-verilog-using-mips.html
* https://github.com/greyqwilson/CS3650_MIPS32ALU

## NaiveMIPS
* https://github.com/z4yx/NaiveMIPS-HDL
* https://github.com/z4yx/ucore-thumips
* https://github.com/z4yx/qemu-naivemips

## step_into_mips
* https://github.com/lvyufeng/step_into_mips
* https://www.bilibili.com/video/BV1pK4y1C7es/
* 教你写一个简单的CPU
* 这个是单周期mips（出自重庆大学），没有实现多周期mips，
* 作者说这个是比较靠谱（好）（龙芯）的开源教学实现

## minimips32
* https://github.com/study34668/MiniMIPS32

## picomips
* https://github.com/karthik-0398/picoMIPS

## edu.cornell.cs3410, mips logisim, cs3410.jar
* https://gitee.com/ForthewinQ/MIPS-CPU

## mipsfpga-plus, schoolMips, xilfpga
* (TODO) https://github.com/flsgavin/MIPSfpga-Boot
* https://github.com/zyy0721/Minisys-OS
* https://github.com/MIPSfpga/schoolMIPS/tree/05_pipeline_ahb/program/00_counter
* https://github.com/MIPSfpga/mipsfpga-plus/blob/master/programs/12_linux/patches/MIPSfpga_linux.patch
* https://github.com/zhelnio/ubuntu-hdl-tools-install
* MIPSfpga_GSG_v2.0.0.zip
* mipsfpga sword
* mips模型机在Sword板子部署在FPGA
* https://www.jianshu.com/p/86e0889755ca
* https://github.com/FlyGinger/MIPSfpga-on-SWORD
* https://github.com/flsgavin/MIPSfpga-Boot
* http://www.sword.org.cn/courses/digital_logic
* https://gitee.com/SWORDfpga/ComputerArchitecture/tree/master
* https://github.com/MIPSfpga/schoolMIPS
* 数字设计和计算机体系结构原书第2版, P.433
* https://github.com/u-boot/u-boot/tree/master/board/imgtec/xilfpga
* linux-4.4 to 4.14
* https://github.com/torvalds/linux/tree/v4.4/arch/mips/xilfpga
* https://github.com/torvalds/linux/tree/v4.14/arch/mips/xilfpga

## mips, nscscc
* https://github.com/nscscc2019ucas/nscscc2019ucas/blob/master/display/soc_up/simu/soft/func/test.lds
* https://github.com/lxfei7310/nontrivial-mips/tree/master/loongson/soc_run_os/simu/soft/func
* https://github.com/leliyliu/augmips/blob/master/nscscc2019_release_v0.01/soc_run_os_v0.01/soc_up/simu/soft/func/start.S
* https://github.com/imhcyx/nscscc-pmon
* https://github.com/easter-mips/nscscc2020
* 针对参加龙芯杯的若干建议, 可参考书籍
* https://github.com/Silverster98/bit_nscscc_suggestion
* pmon
* https://github.com/LoongSonOSTeamNKU/LoongsonCsprjManual/blob/master/chapter2.md
* https://github.com/sime-chill/Build_A_CPU_In_1_Month
* https://github.com/Gon-laze/GadgetMIPS-CPU-report
* https://github.com/leliyliu/augmips
* https://github.com/trialley/loongson_MIPS_demo

## (TODO) freertos
* https://github.com/MIPS/FreeRTOS/tree/mips
* freertos_v5_success.tar.gz
* (TODO) https://github.com/lengdongwl/Ls1bTest
* https://github.com/grihey/FreeRTOS_mips
* (TODO) (from ls1b) freertos_v2_failed.tar.gz

## imgtec CI20, JZ4780，Creator Ci20, linux, android, openwrt
* https://www.elinux.org/CI20_Hardware#Dedicated_UART_header
* https://www.elinux.org/MIPS_Creator_CI20
* (TODO) https://github.com/nfd/ci20-hello-world
* (TODO) https://github.com/avahidi/ci20-baremetal
* https://code.lardcave.net/2015/02/10/1/
* http://code.lardcave.net/2015/02/10/2/
* https://github.com/lucvoo/ll-mips
* 在linux和buildroot里面出现的CI20开发板（都需要较新版，linux 5），
* 其实就是君正的JZ4780（我以前说的那个用于电子辞典的是JZ4740）。
* 另外qemu-system-mipsel里面不支持ci20，但我看了别人的模拟做法，
* 似乎-machine mips就是可以模拟ci20的
* (TODO) qemu-system-mipsel -machine mips is ci20 ???, see avahidi/ci20-baremetal
* (TODO) u-boot command loads, to load srec, see avahidi/ci20-baremetal
* 我搞明白为什么很多OS项目都喜欢输出srec格式文件（S-Record），其实是个梗，
* 大概只有用过u-boot的人会明白。因为u-boot专门有个命令叫loads，
* 这里的s就是srec的意思，可以通过串口粘贴srec文件内容（其实是一堆数字字母文本），
* 就可以把固件烧录进去（srec内带有地址信息）
* https://elinux.org/CI20_Dev_Zone#Source_Code
* https://github.com/MIPS/CI20_linux
* https://github.com/MIPS/CI20_u-boot
* (android) https://github.com/MIPS/manifests
* https://elinux.org/CI20_Distros
* https://github.com/Pteridium/OpenWRT-experimental/tree/ci20-alpha
* https://github.com/Pteridium/OpenWRT-CI20
* https://github.com/avahidi/ci20-baremetal
* https://github.com/wyatt8740/CI20_Linux
* https://github.com/u-boot/u-boot/tree/master/board/imgtec/ci20
* https://github.com/MIPS/CI20_u-boot/tree/ci20-v2013.10/board/imgtec/ci20

## Creator Ci40, openwrt
* https://github.com/CreatorDev/Ci40-platform-feed
* https://github.com/CreatorDev/Ci40_helloworld
* https://github.com/CreatorDev/ci-old

## malta
* https://github.com/u-boot/u-boot/tree/master/board/imgtec/malta

## (TODO) cemu, seem can load vmlinux (no mips kernel config doc ???) and ucore
* https://github.com/cyyself/cemu
* https://github.com/cyyself/cemu/blob/master/docs/riscv64-linux.md

## (TODO) NJU-ProjectN, nemu for mips, etc (only tested in x86)
* https://github.com/NJU-ProjectN
* https://github.com/NJU-ProjectN/nemu
* https://github.com/s0duku/ics2020-s0duku
* libc: https://github.com/s0duku/ics2020-s0duku/tree/main/abstract-machine/klib/src
* linker script: https://github.com/s0duku/ics2020-s0duku/blob/main/abstract-machine/am/src/nemu/isa/mips32/boot/loader.ld
* bootloader: https://github.com/s0duku/ics2020-s0duku/blob/main/abstract-machine/am/src/nemu/isa/mips32/boot/start.S
* bare metal app: https://github.com/NJU-ProjectN/am-kernels/tree/master/kernels/litenes
* os layer, but seem for bare metal: https://github.com/NJU-ProjectN/abstract-machine
* ics2020-s0duku-main_v3.tar.gz, build method see apt_install.txt (only test in x86)

## f32c
* https://github.com/f32c/f32c

## MangoMIPS32
* https://github.com/RickyTino/MangoMIPS32

## OpenMIPS, 自己动手写CPU
* https://github.com/zach0zhang/Single_instruction_cycle_OpenMIPS
* https://github.com/Tengs-Penkwe/OpenMIPS
* https://github.com/yufeiran/OpenMIPS

## build-a-cpu, logisim
* https://github.com/ztreble/build-a-cpu

## MiniMIPS32
* https://github.com/study34668/MiniMIPS32

## nontrivial-mips
* https://github.com/lxfei7310/nontrivial-mips

## MIPS246 Compiler & Assembler
* https://github.com/ceie246/MIPS246_Software

## cii, C Interfaces and Implementations, C语言接口与实现
* https://github.com/drh/cii/blob/master/src/swtch.s

## RIOT, before 2022.09
* https://github.com/RIOT-OS/RIOT/tree/2022.07-branch/boards/pic32-wifire/include
* https://gitee.com/bydvp/RIOT/tree/2022.07-branch/boards/pic32-wifire/include

## zephyr, qemu machine malta
* https://docs.zephyrproject.org/latest/boards/mips/qemu_malta/doc/index.html

## nuttx, for pic32m
* https://nuttx.apache.org/docs/latest/introduction/detailed_support.html#microchip-pic32mx2xx

## (TODO) ucosii
* mips_ucos_1.10.rar
* ucos2.8-run-mips.rar
* https://github.com/Tengs-Penkwe/OpenMIPS/tree/master/ucosii_sourcecode
* https://github.com/yufeiran/OpenMIPS/tree/master/OpenMIPS/ucosii_sourcecode

## Simulizer, for r3000
* https://github.com/Simulizer/Simulizer
* Simulizer-0.43-beta.zip, need jdk8

## RTEMS
* https://github.com/RTEMS/rtems/tree/master/bsps/mips
* https://ftp.rtems.org/pub/rtems/releases/5/
* https://blog.csdn.net/coolbacon/article/details/6089478

## tcc, tinycc, tinycc-mips
* https://github.com/lhzhang/tinycc-mips
* 我发现有人吐槽tinycc（通常叫tcc）不支持MIPS，太难了（可不可以照着RISC-V来改），不过另一个编译器clang应该是可以输出MIPS的机器码

## gcc
* https://github.com/ChrisRx/mipsel-ecoff-toolchain
* https://blog.csdn.net/ailuo58882/article/details/102270410
mips-elf-gcc交叉编译环境的建立 (转载)
* (gcc-4.4.6, not found) https://www.mips.com/linux-toolchain/
* (see mips_linux_toolchain_src-1.1.tar.bz2) https://ir.nctu.edu.tw/bitstream/11536/44056/1/950301.pdf
* (gcc-4.2.1) uclinux: https://github.com/Krush206/uclinux-mipsel-toolchain
* (gcc-4.1.2) uclibc : https://www.uclibc.org/downloads/binaries/0.9.30.1/cross-compiler-mipsel.tar.bz2
* (gcc-4.2.1) Aboriginal Linux : http://landley.net/aboriginal/downloads/binaries/cross-compiler-mipsel.tar.gz
* (gcc-4.8.2) https://www.linux-mips.org/wiki/Toolchains
* (gcc-6.3.0) https://stackoverflow.com/questions/42022659/how-to-get-a-smaller-toolchain-from-scratch
* (gcc-4.3.2) rtems : https://ftp.rtems.org/pub/rtems/archive/windows/4.9/build-5/rtems4.9-tools-mips-5.exe
* rtems gcc cygwin version (not found) see https://blog.csdn.net/coolbacon/article/details/6089478
* (gcc-4.2-85 and above, Sourcery G++ Lite 4.2-85) https://sourcery.sw.siemens.com/GNUToolchain/subscription3130?lite=MIPS
* https://gitee.com/bytes33/MIPS-TOOLS
* https://gitee.com/bei_yi_ning/mips_tools_win
* (gcc-3.0.4) vmips, unmodified versions of gcc-3.0.4, and binutils-2.15, configured for mipsel-ecoff, and compiled for cygwin :
http://www.dgate.org/vmips/utils/mips-tools/cygwin/cygwin-mips-tools.tar.gz
http://www.dgate.org/vmips/utils/mips-tools/cygwin/
need cygwin1.dll, can copy from WinAVR-20100110, from WinAVR-20100110-install.exe
https://sourceforge.net/projects/winavr/files/WinAVR/20100110/
```
>mipsel-ecoff-gcc -v
Reading specs from ../lib/gcc-lib/mipsel-ecoff/3.0.4/specs
Configured with: ../gcc-3.0.4/configure --prefix=/usr/local/mipsel-ecoff --target=mipsel-ecoff
--disable-shared --disable-nls --with-gnu-as --with-gnu-ld
Thread model: single
gcc version 3.0.4
```

## clang, llvm-gcc
* https://github.com/llvm/llvm-project/blob/main/lld/test/ELF/mips-32.s

## lcc
* https://github.com/drh/lcc

## qemu
* https://www.aurel32.net/info/debian_mips_qemu.php
* https://people.debian.org/~aurel32/qemu/mipsel/
* https://repo.or.cz/qemu/qemu-loongson.git
* https://repo.or.cz/qemu/qemu-JZ.git

## mips_os
* https://github.com/LinHeLurking/mips_os

## 从一道mips题目学习搭建mips环境及ROP
* https://cloud.tencent.com/developer/article/1745278
* https://github.com/Q1IQ/ctf

## X1000 RT-Thread-XBurst
* https://github.com/XBurst/RT-Thread-XBurst/tree/master/bsp/x1000
* https://github.com/Real-Thread/bsp_x1000
* https://github.com/RT-Thread/rt-thread/tree/stable-v3.0.x/bsp/x1000

## qemu, mipsel firmware emulation for auto-testing purposes
* https://github.com/lunixoid/qemu_mips

## u-boot, u-boot qemu
* https://u-boot.readthedocs.io/en/v2020.04/board/emulation/qemu-mips.html#limitations-comments
* https://u-boot.readthedocs.io/en/latest/board/emulation/qemu-mips.html
* some mips boards not in documents, but in source
* https://github.com/u-boot/u-boot/tree/master/board/imgtec

## aoR3000, for r3000
* https://github.com/alfikpl/aoR3000

## vmips, for r3000
* http://www.dgate.org/vmips/works.shtml

## cui32
* https://github.com/dwelch67/pic32_samples
* https://code.google.com/archive/p/cui32/downloads
* https://github.com/bcquitevis23/cui32

## discobsd
* https://github.com/chettrick/discobsd

## picsimlab
* https://lcgamboa.github.io/picsimlab_docs/0.8.10/Introduction.html#x2-10001
* https://github.com/lcgamboa/picsimlab

## UBIBoot
* https://github.com/pcercuei/UBIBoot

## xburst
* https://github.com/Ingenic-community/Linux-XBurst
* https://github.com/Ingenic-community/uboot-xburst
* https://github.com/Ingenic-community/RT-Thread-XBurst
* https://github.com/JaminCheung/x-loader
* https://github.com/tobunto/ingenic-toolchain-v5.2

## Cfern, mipsem, busybox-mips
* https://github.com/alexyz/mipsem
search baidupan, mipsem_v1.7z
https://github.com/alexyz/mipsem/blob/master/src/cfern/Driver.java
use -w
* https://busybox.net/downloads/binaries/
* https://busybox.net/downloads/binaries/1.16.1/busybox-mips
not busybox-mipsel

## 龙芯LoongIDE
* mips-2015.05_from_sdelite_4.9.2_for_mips.rar
* LoongIDE_from_loongide_1.2_beta3_setup.rar
* loongide_1.2_beta3_setup.exe

## (TODO) Educational kernel/rtos implementation for MIPS Malta QEMU
* https://github.com/goniz/gzOS

## arm_now
* https://github.com/nongiach/arm_now

## sysmips, in Java (need JDK8)
* https://github.com/alexyz/sysmips
* running MIPS 4kc malta linux rom (linux source build not tested, only rom file)

## pcsx2
* https://github.com/PCSX2/pcsx2

## nu32
* Embedded Computing and Mechatronics with the PIC32 Microcontroller
* 嵌入式计算与机电一体化技术：基于PIC32微控制器
* http://hades.mech.northwestern.edu/index.php/NU32
* https://textbooks.elsevier.com/web/product_details.aspx?isbn=9780124201651&Search=nu32&SearchCriteria=Keyword
* http://hades.mech.northwestern.edu/index.php/NU32_Software
* PIC32Quickstart.zip

## CuRT_v1_MIPS
* https://github.com/algosenses/CuRT_v1_MIPS
* https://github.com/Rafe/CuRT
* https://github.com/jserv/CuRT

## pic32, uno32
* 经过我的努力，终于把变砖的uno32救回来了。之前没办法烧录bootloader的原因也找到了，
是因为杜邦线的问题，导致无法检验设备id，我把杜邦线反转次序就正常了。
烧录也不是很明白，我用的是IPE v6，但我不清楚怎么烧录成功的，
可能是因为我勾选了高级模式，Allow Memory View，Program Memory，
也可能不是这样做（待考），我先烧录一个别的hex再烧录bootloader，
最后要拔出pickit3才能看到闪灯（？）
* 只需要烧录bootloader，然后拔掉pickit3，就可以看到闪灯效果，不需要再烧录其他hex文件
* 如果出现识别不到设备id，或者提示电压不够，
请检查杜邦线是不是可能有一根不通（例如反转过来次序重新接或更换新的），
或者重新插拔pickit3的usb

## Fishino32, PIC32MX470F512HI/MR
* http://www.fishino.it/arduinoide/package_fishino_index.json
* https://fishino.it/fishino32.html
* https://fishino.it/fishino-piranha-133.html
PIC32MX470F512H-120I/PT
* https://fishino.it/fishino-shark-135.html
PIC32MX470F512L-120I/PF

## (TODO) yamon, mips bootloader
* https://github.com/binsgit/mips-yamon
* https://www.mips.com/develop/tools/boot-loaders/
* search baidupan, yamon-src-02.04.tar.gz

## TinyMIPS
* http://staff.ustc.edu.cn/~han/CS152CD/

## (IMP) MIPS SDE-lite, sde-gcc, sde-run, sde-gdb, for Windows / Cygwin and Linux
* http://staff.ustc.edu.cn/~han/CS152CD/Content/Software/SDElite/clickthru.html
* http://staff.ustc.edu.cn/~han/CS152CD/, software->MIPS SDE-lite
* (IMP) http://staff.ustc.edu.cn/~han/CS152CD/Content/Software/SDElite/sde-guide.pdf
* Computer Organization and Design
* (TOOD) MIPSSW-MSDE-v5.03.06.tgz\.\sde\examples\hello
* (TODO) maybe sde-gdb can use mipssim ???
* search baidupan, COD3E_计算机组成与设计.iso, 第3版
* 计算机组成与设计：硬件/软件接口
```
在Windows下运行SDE单步调试MIPS hello程序，首先安装SDE，把COD3E，
计算机组成与设计这本书的光盘中的Cygwin版SDE安装到Msys下，
把/sde/bin添加到/etc/profile代码中加入PATH变量值中，
把sde\sde\include\mips复制到sde\sde\include\machine目录（缺少符号链接），
切换到sde\sde\examples\hello
然后用make SBD=GSIM32L编译（不要用sde-make，因为不是cygwin），
再用sde-run helloram运行。
然后用sde-gdb helloram打开图形界面调试器（和其他gdb不同，这个默认是图形界面，
也可以用-nw开关关闭图形界面），
点击左上角的运行按钮（跑步图标），选择GNU Simulator（相当于target sim），
点击控制台图标，
然后步进即可在控制台中看到输出（类似于sde-run的效果）
如果是sde-gdb -nw helloram，则是：
$ sde-gdb -nw helloram
(gdb) target sim
(gdb) load
(gdb) b main
(gdb) r
(gdb) q
具体请参考sde-guide.pdf的第4章Page 22.
```
```
其实MIPS古老开发套件SDE中，SDE-GDB没有标是什么软件，看上去是tcl/tk风格的界面，
代码是gdbtcl。可以用来研究MIPS汇编。我找了一下，应该是根据linux软件insight调试器
（或者叫Cygnus Insight Debugger，或者叫gdbtk）改出来的。除了Insight，
还有别的常用gdb图形调试工具，例如ddd（也是基于tcl）和gdbtui（gdb内置功能）
```
* copy cygwin1.dll to /sde/bin, dll file is from WinAVR-20100110-install.exe

## mraa, libmraa
* https://github.com/eclipse/mraa/blob/master/docs/linkit_7688.md
* https://github.com/eclipse/mraa/blob/master/src/mips/mediatek.c

## HUST OS ???
* 华中科技大学计算机学院计算机组成原理课程设计, logisim run hex (?)
* https://github.com/Starrylay/awesome-HUST-CS-MIPS-CPU
* https://github.com/ver217/MIPS-CPU-TOY
* mips-probe.jar
* cs3410.jar
* java -jar logisim-hust-20200118.exe
* some risc-v
* some mips java emulator code is in cs3410.jar
* 有人做了logisim的mips器件插件，用于模拟mips，叫cs3410.jar，
出处不详（可能是外面的课程，可能是闭源的），可以反编译，
看到里面好像是有一个Java写的mips汇编器。。。
有人甚至把它改成risc-v版和arm版。。。
我没试过，有课程用到这个东西去模拟mips的cpu，
有本叫《计算机组成原理实践教程——从逻辑门到CPU》
* cs3410.jar: edu.cornell.cs3410.ProgramAssembler#main: 汇编器
```
usage: ProgramAssembler
```
* mips-probe.jar: hust2020.Probe2#paintInstance: 反汇编器
* Mars4_5.jar, MIPS汇编工具及测试用例4.7, 很多可以用mars运行的汇编例子

## MIPS Embedded OS (MEOS)
* https://github.com/MIPS/meos

## 君正 X1500 ???
* https://github.com/IceForgTW/X1500

## mipseltools-gcc412-lnx26, 君正jz4740 gcc toolchain
* https://github.com/OpenNoah/mipseltools-gcc412-lnx26
* https://github.com/OpenNoahEdu/ingenic-mipseltools-gcc412-glibc236-lnx26
* https://gitee.com/piaoxuebingfeng/mipseltools-gcc412-lnx26

## (TODO) qemu-JZ, jz-hacking google code archive
* https://code.google.com/archive/p/jz-hacking/downloads
* https://repo.or.cz/w/qemu/qemu-JZ.git
* https://github.com/yajin/jz-hacking/blob/master/wiki/qemujz.wiki
* (TODO) qemu-JZ_20090207.tar.gz, jz_linux_2.6.24.3_20090624.tar.bz2, qemu-JZ-d1ef263.tar.gz
* 研究一下怎么跑这个qemu-JZ
* see https://code.google.com/archive/p/jz-hacking/wikis/qemujz.wiki
* ./qemu-system-mipsel -M pavo -mtdblock pavo-nand.bin

## JZ4740 Pavo Board
* https://github.com/OpenNoahEdu/ingenic-4740

## JZ4740 MIPS version
* https://handwiki.org/wiki/Company:Ingenic_Semiconductor
* https://handwiki.org/wiki/List_of_MIPS_architecture_processors
* http://www.ingenic.com.cn/en/?xburst.html
* MIPS32 rev1: Jz4720, Jz4725B, Jz4730
* MIPS32 rev1 + SIMD: Jz4740
* MIPS32 rev1 + SIMD2: Jz4750, Jz4755, Jz4760
* MIPS32 rev2 + SIMD2: Jz4770, Jz4775
* Dual MIPS32 rev2 + SIMD2: Jz4780
* MIPS32 + SIMD (r5?): x1000
* Dual MIPS32 + SIMD (r5?): x2000

## 君正m150_cnx-software
* https://www.cnx-software.com/2015/02/10/ingenic-halley-is-20-linux-based-iot-board-with-wi-fi-and-bluetooth-4-1-connectivity/
* https://imgtec.eetrend.com/d6-imgtec/forum/2015-02/4851.html
* $ export PATH=path/to/SDK/binaries/toolchain/mips-gcc472-glibc216/bin:$PATH
$ export CROSS_COMPILE=mips-linux-gnu-
uboot：
$ make halley_uImage_spinor
kernel：
$ make halley_linux_defconfig
$ make uImage
* 提醒：
文件系统默认挂载ramdisk（rootfs.cpio.gz），若要使用WIFI需将ramdisk更改为（rootfs_wifi.cpio.gz）,两个ramdisk都支持ADB。
ramdisk 修改路径：arch/mips/xburst/soc-4775/chip-m150/halley/common/
烧录工具：
烧录工具已经存放到代码目录下，其下载路径：binaries/host-tools/BurnerBinary/latest-halley-linux-burner
注意，0.25.1烧录工具烧录Halley,使用配置暂时如下：
1，平台：4775
2，板级：gemini_spi_lpddr.cfg
系统操作中注意事项：
1，WIFI 信号不好，需外接天线，同时WIFI距热点较远时，信号衰减较大，频偏未校准，建议使用airkiss调试时靠近WIFI热点（三米以内）。
2，系统启动进入Buildroot时，密码为：root

## 君正jz4740_pavo开发板
* search, 君正jz4740_pavo开发板
* (?TODO, bare-metal) https://github.com/OpenNoah/bmkernel/tree/master
https://github.com/OpenNoah/bmkernel/blob/master/main.c
* https://github.com/OpenNoah/OpenNoah.github.io/tree/master/datasheet
* qt2: https://github.com/OpenNoah/qt-2.3.10
* kernel readme: https://github.com/retrofw/kernel/blob/main/README-JZ
* busybox: https://github.com/OpenNoah/rootfs
https://github.com/OpenNoah/rootfs/releases
* see 源码中国
* 君正4750开发板使用日记6-uCOS(minios)的开发配置试验
https://blog.csdn.net/huzgd/article/details/6065818
* from virtualmips
https://elinux.org/CELinux_040503_Release
https://osdn.net/projects/sfnet_virtualmips/
https://sourceforge.net/projects/virtualmips/files/virtualmips/

## IngenicHAL
* https://github.com/Ingenic-community/IngenicHAL
* https://github.com/Ingenic-community/IngenicHAL/blob/main/examples/st7789_bitbang.c

## Ingenic T31
* https://github.com/cgrrty/Ingenic-SDK-T31-1.1.1-20200508

## opendingux buildroot and linux and qemu-system-mipsel
* http://prizma.bmstu.ru/~exmortis/posts/2015-04-23-opendingux-qemu.html
* https://github.com/dmitrysmagin/opendingux-buildroot
* https://github.com/mthuurne/opendingux-buildroot
* https://github.com/dmitrysmagin/linux
* https://github.com/gcwnow/linux
* https://steward-fu.github.io/website/handheld/a320/opendingux/os_qemu.htm

## mimiker
* https://github.com/cahirwpz/mimiker

## gcc for baremetal
* Codescape.GNU.Tools.Package.2021.09-01.for.MIPS.IMG.Bare.Metal.Windows.x86_64.tar.gz
* mips-2015.05-19-mips-sde-elf-i686-pc-linux-gnu.tar.bz2
* mips-mti-elf-gcc 2017.10-05, mipssdk.v2.0.0k.windows.x64.offline.exe

## MT7688 TFT
* https://github.com/2324059/spi_tft

## CPU设计实战
* 这本mips书也不错，是龙芯自己出的。进阶，讨论AXI和SoC问题，或者说它讨论更复杂的测试问题。
以后打算买来收藏，暂时不看，因为这本偏难。这本书用的开发板是为XC7A200T（系列最高配），
Vivado 2019.2。甚至还有云端的FPGA开发

## MIPS ASM Space Invaders
* https://github.com/Gguidini/SpaceInvaders

## moo_compiler
* https://github.com/nkumar0727/moo_compiler

## 芯联芯, 技术资源
* https://www.cipunited.com/cn/res-platform.html

## 从CPU到SoC的设计与实现基于高云云源软件和FPGA硬件平台
* 这本新书，《从CPU到SoC的设计与实现基于高云云源软件和FPGA硬件平台》，出版社是电子工业出版社，也是讲MIPS的，想买未入手。有提供随书代码，工具链是mips-mti-elf-gcc，安装是Windows版的Codescape mipssdk v2.0.0k（这个安装文件少见，收藏），可以同时装bare和linux两种工具链，2017.10-05
* https://github.com/alexlimofficial/gcc-mips-compiler
* https://zhuanlan.zhihu.com/p/671895745
* https://www.hxedu.com.cn/hxedu/hg/book/bookInfo.html?code=TN462950
* mipssdk.v2.0.0k.windows.x64.offline.exe
* cpusoc_design_example.zip
* http://codescape.mips.com/sdk/v2.0.0k/docs/
* 我买的另一本《从CPU到SoC的设计与实现》也到手的，我认为MIPS内容值得入手，主要讲单周期MIPS和流水线MIPS（带AHB-Lite总线接口）结合高云开发工具和ModelSim波形仿真。用到的FPGA是高云GW2A-LV55PG484C8，但高云的GW2A系列虽然有sipeed的荔枝糖系列（如20K和25K）但这个可能是55K，应该是很难得到硬件的，但荔枝糖也属于GW2A系列（高云主推的第一个系列）

## buildroot
* https://buildroot.org
* buildroot-2024.02.1.tar.gz\buildroot-2024.02.1\configs\qemu_mips32r2el_malta_defconfig
* buildroot-2024.02.1.tar.gz\buildroot-2024.02.1\board\qemu\mips32r2el-malta
* readme.txt
* qemu-system-mipsel -M malta -kernel output/images/vmlinux -serial stdio -drive file=output/images/rootfs.ext2,format=raw -append "rootwait root=/dev/sda" -net nic,model=pcnet -net user
* for qemu_mips32r2el_malta_defconfig

## delay slot
* 延时槽

## mips linux
```
x86 vm
https://qiita.com/okuoku/items/e3e7e73d9d5e4ff92112
https://github.com/jart/blink

mips sandbox
https://github.com/nikhilh-20/ELFEN

mips linux
https://github.com/mellow-hype/malta-kernel-images/tree/main

mips qemu
https://qemu-project.gitlab.io/qemu/system/target-mips.html
mips emulator, wowmips
https://www.x86matthew.com/view_post?id=mips_1
https://hackaday.com/2024/02/17/wowmips-a-mips-emulator-for-windows-applications/
https://github.com/x86matthew/WoWMIPS/tree/main
https://github.com/hugsy/cemu
https://github.com/cvut/QtMips
https://github.com/alexfru/EmuMipsElf/tree/master
https://github.com/alexfru/SmallerC
riscv64 linux
https://github.com/cyyself/cemu/blob/master/docs/riscv64-linux.md

???
https://github.com/nju-mips/nemu-mips32/tree/master

my study
* barebone_v1_success_mipssim_ubuntu140432_sde.tar.gz
* qemu_gdb_mips_hello-master_v1_ubuntu140432_sde.tar.gz
buildroot malta qemu
https://github.com/buildroot/buildroot/blob/master/board/qemu/mips32r2el-malta/readme.txt
* skyeye-testsuite-1.3.4_rc1\skyeye-testsuite\dyncom\hello-mips
https://github.com/alexyz/sysmips
sysmips, 4kc, ??? how to buld kernel, ??? where kernel files
linux source build not tested, only rom file
目前看来比较容易运行起来的mips linux (特别是malta目标机）古旧版本内核是3.2或者2.6之间。
有这些线索和头绪：
（1）从baremetal开始改，baremetal mips跑qemu输出日志还是比较容易做到
（2）通过buildroot，你别说buildroot甚至带了mips malta地目标配置，
说不定真可以qemu（甚至有qemu参数说明）
（3）通过skyeye，待考
（4）通过sysmips，可以模拟linux 3内核，但编译方法不明，待考
（5）通过qemu，只测试了linux-3.5
（6）通过ls1b修改版qemu，似乎对应linux-2.6.3, 4.19, 5.3

这本新书，《从CPU到SoC的设计与实现基于高云云源软件和FPGA硬件平台》，
出版社是电子工业出版社，也是讲MIPS的，想买未入手。
有提供随书代码，工具链是mips-mti-elf-gcc，
安装是Windows版的Codescape mipssdk v2.0.0k（这个安装文件少见，收藏），
可以同时装bare和linux两种工具链，2017.10-05
==
https://github.com/alexlimofficial/gcc-mips-compiler
https://zhuanlan.zhihu.com/p/671895745
https://www.hxedu.com.cn/hxedu/hg/book/bookInfo.html?code=TN462950
mipssdk.v2.0.0k.windows.x64.offline.exe
cpusoc_design_example.zip
http://codescape.mips.com/sdk/v2.0.0k/docs/

```

## 二进制安全基础_mips_随书代码
* 二进制安全基础

## armips
* https://github.com/Kingcom/armips
* https://github.com/hrydgard/ppsspp/tree/master/ext

ecosyste.ms

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