RealCPU Project

Make a MIPS CPU and write an operating system.

CPU Features

1. Nearly complete MIPS32 Release 6 ISA support, without floating points and privileged instructions
2. five stages pipeline with 40M clock
3. Dedicated L1 32K Instrcution & 32K Data Cache
4. 512K Main Memory
5. GCC cross-compile support

IO Devices Support

1. UART: 4K TX/RX FIFO, support send / receive in c code
2. 24 switches & 24 leds
3. 5 buttons and the keypad
4. Seven-segment display

TODOs

• SRAM support
• TF Card support
• [ ]

Goals

• Single Cycle
• Pipeline
• Byte & half-word Memory Access support
• L1 Data/Instruction Cache & Unified Main Memory
• Bootloader, UART loader
• C/C++ cross compile support (limited)
• Interrupt & Syscalls support
• Initialize $sp and $gp, support $gp addressing
• DDR3 Support
• SD Card Support

Developing Guide

Vivado

1. Create a new project
2. Import verilog source files
3. Import ipcores folder
4. Regenerate ip cores
5. Import simulation files

Assembly

1. Learn Makefile
2. use make $(targets) to generate ROM and other files
3. Reconfigure coe files generate ROM/RAM ipcores