EwokOS

Misa.Z misa.zhu@gmail.com

A microkernel OS for learning operating system. versatilepb / raspi1,2,3 ported well, raspi4 todo....
-mmu
-smp multi-core
-copy on write
-multi processes
-multi thread
-ipc
-virtual fs service(everythig is a file)
-very simple ramdisk for initrd
-framebuffer device service for graphics
-uart device service
-SD card

QEMU: 
	install the last version of qemu

Mac OSX(with brew installed):	
	brew tap PX4/homebrew-px4
	brew install gcc-arm-none-eabi-49
	(set the right PATH environment after installed)
	download usb to ttl driver https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
	
How to create/mount ext2 image in macosx
	===============prepair================
	install macFUSE from official website(https://osxfuse.github.io/)
	brew install e2fsprogs
	brew install libtool 
	brew install autoconf
	brew install automake

	(download https://github.com/alperakcan/fuse-ext2)
	./autogen.sh
	CFLAGS="-idirafter/opt/gnu/include -idirafter/usr/local/include/osxfuse/ -idirafter/$(brew --prefix e2fsprogs)/include" LDFLAGS="-L/usr/local/opt/glib -L/usr/local/lib -L$(brew --prefix e2fsprogs)/lib" ./configure
	sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
	make
	sudo make install
	=================example==============
	dd if=/dev/zero of=root.ext2 bs=1024 count=16384
	mke2fs -b 1024 -I 128 root.ext2 (make ext2 fs with: block_size=1024 inode_size=128)
	mkdir -p tmp
	fuse-ext2 -o force,rw+ img tmp
	(copy files)
	umount ./tmp
	rm -r tmp

install minicom(linux/mac)

"cd kernel/build/{arch}; make":
  build EwokOS kernel image.

"cd system; make/make full(with xgui)/make extra(with xgui and extra apps"; make sd:
  build EwokOS rootfs apps and sd file system.

"cd kernel/build/raspi2"
"make run":
  run EwokOS(username: root, password: (none));
"make debug":
  run EwokOS at debug server-mode.
"make gdb":
  debug EwokOS (debug client-mode).

Most of commands are in 'rootfs/sbin' directory, like:
ls, ps, pwd, test ......

PhyMem        VMem         Desc
----------------------------------------------------
0x00000000    0xFFFF0000   interrupt table
0x00008000    0x80008000   Kernel start (load to)
***           ***          (_init_stack, _irq_stack, _startup_page_dir)
***           ***          Kernel end, Kernel PageDir Table start
+16KB         +16KB        Kernel PageDir Table end.
+128KB        +128KB        kernel malloc base
+32M           +32M          kernel malloc end (size=2M).
......
physical ram top           Share memory start base               
......
MMIO_BASE_PHY MMIO_BASE    MMIO base (arch)
......