README: Rework it according to the totally-recent build changes

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>

README.md

@@ -1,25 +1,61 @@
 # uniLoader
-A simple secondary bootloader that is capable of loading Linux for Android and iOS based devices.
+A secondary bootloader that is capable of loading the upstream Linux kernel for Android and iOS-based devices.</br></br>
+The purpose behind it is to provide a small shim for avoiding vendor bootloader quirks.</br>
+> (ex.: some newer Exynos phones leave decon framebuffer refreshing disabled right before jumping to kernel, which makes initial debugging efforts when bringing up the platform to upstream linux hard)</br>
+The currently supported architectures are ARMV7 and AARCH64.</br>
+
+## Preparation
+1. Install a toolchain that matches your target architecture (ex. AArch64 cross-toolchain):
+    ```sh
+    sudo apt install aarch64-linux-gnu
+    ```
+2. Clone the repository:
+    ```sh
+    git clone https://github.com/ivoszbg/uniLoader
+    ```
+3. Navigate to the project directory:
+    ```sh
+    cd uniLoader
+    ```
+4. Place your kernel and device tree blobs under the `blob/` directory.
+
+### Make Syntax
+```sh
+make ARCH=<arch> CROSS_COMPILE=<toolchain>
+```
+
+### Building Example
+```sh
+sudo apt install aarch64-linux-gnu
+git clone https://github.com/ivoszbg/uniLoader
+cd uniLoader
+cp /home/user/linux/arch/arm64/boot/Image blob/Image
+cp /home/user/linux/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dtb blob/dtb
+make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j4 dreamlte_defconfig
+make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j4
+```
+
+### Usage
+
+```sh
+For Apple devices: Load the generated uniLoader binary via PongoOS.
+For Android devices: Replace the Linux kernel in your boot.img with the uniLoader binary.
+```
+
+### TODO LIST
+1. [C] Allow loading instead of PongoOS for Apple devices;
+2. [C] Fix/replace the libc implementation;
+3. [M] Implement a serial library and make the debug lib less hacky;
+4. [M] Implement more features:
+   > New devices</br>
+   > Boot menu with countdown timer and selectable items via GPIO volume keys</br>
+   > Threaded execution
+
+<h6>
+  [C] = Critical for overall ease of use and functionality</br>
+  [M] = Nice to have :)
+</h6>
+
+### License
 
-# Building
-1. Install aarch64-linux-gnu
-2. ```git clone https://github.com/ivoszbg/uniLoader```
-3. ```cd uniLoader```
-4. Place your kernel and device tree blobs under blob/
-5. ```make BOARD=(oem)-(board-codename) SOC=(device-soc)```<br />
-# Building example
-```sudo apt install aarch64-linux-gnu```<br />
-```git clone https://github.com/ivoszbg/uniLoader```<br />
-```cd uniLoader```<br />
-```cp /home/user/linux/arch/arm64/boot/Image blob/Image```<br />
-```cp /home/user/linux/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dtb blob/dtb```<br />
-```make BOARD=samsung-dreamlte SOC=exynos8895```
-# Usage
-For Apple devices: Load the generated **uniLoader** binary via PongoOs (TODO: allow loading **instead** of PongoOs)<br /><br />
-For Android devices: Replace the linux kernel in your *boot.img* with the **uniLoader** binary
-# Credits
-VDavid003 - for his sboot wrapper<br />
-Quack723 - Contributor<br />
-Ivoszbg - Making this huge mess of a bootloader
-# License
 This project is licensed under GPL2.