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Author: theEmbeddedGeorge

Operating_System/Process/IPC.md

@@ -1,6 +1,6 @@
 ## Interprocess Communications
 
-#### Methods in Interprocess Communication
+#### **Methods in Interprocess Communication**
 Inter-process communication (IPC) is set of interfaces, which is usually programmed in order for the programs to communicate between series of processes. This allows running programs concurrently in an Operating System. These are the methods in IPC:
 
 - Pipes (Same Process)
@@ -35,4 +35,10 @@ Inter-process communication (IPC) is set of interfaces, which is usually program
 #### Detailed Explanations
 - [Shared Address Space](https://courses.engr.illinois.edu/cs241/sp2012/lectures/29-IPC.pdf) (Shared Memory, Memory Mapped Files)
 - [Message transported by OS from one address space to another](https://courses.engr.illinois.edu/cs241/sp2012/lectures/30-IPC.pdf)(Files, Pipes and FIFOs)
-- [Some POSIX Examples](https://courses.engr.illinois.edu/cs241/fa2010/ppt/31-IPC.pdf)
+- [Some POSIX Examples](https://courses.engr.illinois.edu/cs241/fa2010/ppt/31-IPC.pdf)
+
+
+#### Implementation
+[Brendan's Multi-tasking Tutorial](https://wiki.osdev.org/Brendan%27s_Multi-tasking_Tutorial)
+
+This tutorial will describe a way to implement multi-tasking and task switching for a kernel that uses "kernel stack per task". It has been designed to allow the reader to implement a full featured scheduler (while avoiding common pitfalls) in steps that can be tested before moving on to the next step.

Operating_System/virtual_memory.md

@@ -1,5 +1,16 @@
 ![cache misses](https://i.stack.imgur.com/ILhkK.jpg)
 
+### Virtual Addressing
+
+### MMU
+
+### Paging 
+
+### TLB 
+
+### Page Table
+
+
 
 ### Reference
 

README.md

@@ -15,6 +15,8 @@
 9. [C Storage Class, Scope and Memory allocation](https://www.tenouk.com/ModuleZ.html)
 10. [C/C++ Storage Classes: const, volatile, local and global](https://www.tenouk.com/Module20.html)
 11. Inline functions
+    1.  [Inline Assembly](https://wiki.osdev.org/Inline_Assembly)
+    2.  [Inline Assembly examples](https://wiki.osdev.org/Inline_Assembly/Examples)
 12. Declarations in C
 13. Runtime data strtuctures 
 14. [Buffer Overflow](https://www.tenouk.com/Bufferoverflowc/Bufferoverflow1.html)
@@ -138,7 +140,7 @@
     2.  Sychronization Facilities
 4.  Memory Management
     1.  Memory Hardware
-    2.  [Virtual Memory](Operating_System/virtual_memory.md)
+    2.  [Virtual Addressing/Memory](Operating_System/virtual_memory.md)
 5.  File System Management
 6.  Device I/O Management
 7.  RTOS
@@ -151,29 +153,35 @@
         6.  [API Reference](https://www.freertos.org/a00106.html)
     2.  [QNX](http://www.qnx.com/developers/docs/qnxcar2/index.jsp?topic=%2Fcom.qnx.doc.neutrino.getting_started%2Ftopic%2Fs3_qnx2nto_Device_driver_model.html)
 8.  [Linux](https://0xax.gitbooks.io/linux-insides/content/)
-    - [Great linux overview](http://www.wowotech.net/sort/linux_kenrel)
-    1.  [Kernel Source Code All Versions](https://elixir.bootlin.com/linux/v4.9.242/source)
-    2.  [Linux Device Model](./Operating_System/Linux/Linux_device_model.md)
-    3.  Synchronization primitives
-    4.  Booting
-    5.  [Linux Booting Process](Operating_System/Linux/booting.md)
-    6.  Intialization
-    7.  Interrupt
-    8.  [System Call](Operating_System/Linux/syscall.md)
-    9.  [Boot Loader](Operating_System/Linux/boot_loader.md)
-    10. Timers and time management
-    11. Memory Managment
-    12. [Process Management](https://tldp.org/LDP/intro-linux/html/chap_04.html)
-    13. [Linux Data Structures](https://tldp.org/LDP/tlk/ds/ds.html)
-    14. [Linux Socket Programming](https://www.tenouk.com/cnlinuxsockettutorials.html)
+    1.  [Linux Kernel Overview Blogs](http://www.wowotech.net/sort/linux_kenrel)
+    2.  [Kernel Source Code All Versions](https://elixir.bootlin.com/linux/v4.9.242/source)
+    3.  [Linux Device Model](./Operating_System/Linux/Linux_device_model.md)
+    4.  Synchronization primitives
+    5.  Booting
+    6.  [Linux Booting Process](Operating_System/Linux/booting.md)
+    7.  Intialization
+    8.  Interrupt
+    9.  [System Call](Operating_System/Linux/syscall.md)
+    10. [Boot Loader](Operating_System/Linux/boot_loader.md)
+    11. Timers and time management
+    12. Memory Managment
+    13. [Process Management](https://tldp.org/LDP/intro-linux/html/chap_04.html)
+    14. [Linux Data Structures](https://tldp.org/LDP/tlk/ds/ds.html)
+    15. [Linux Socket Programming](https://www.tenouk.com/cnlinuxsockettutorials.html)
 
 ### I. Computer Architecture
 1.  ARM programmer's model
 2.  Pipeline
 3.  CPU Architecture
     1.  ARM
-        1.  [ARM Assembly](https://azeria-labs.com/writing-arm-assembly-part-1/)
+        1.  [ARM overview](https://wiki.osdev.org/ARM_Overview)
+        2.  [ARM Assembly](https://azeria-labs.com/writing-arm-assembly-part-1/)
+        3.  [ARM Paging](https://wiki.osdev.org/ARM_Paging)
     2.  Intel
+        1.  [GDT Tutorial](https://wiki.osdev.org/GDT_Tutorial)
+        2.  [Interrupt Descriptor Table](https://wiki.osdev.org/Interrupt_Descriptor_Table)
+        3.  [IDT problems](https://wiki.osdev.org/IDT_problems#Problems_with_IDTs)
+        4.  [Advanced Programmable Interrupt Controller (APIC)](https://wiki.osdev.org/APIC)
 4.  Memory Hierachy
 5.  [Cache coherence](https://www.geeksforgeeks.org/cache-coherence/)
 6.  [DMA](./Computer_architecture/dma.md)
@@ -187,10 +195,15 @@
 2.  [Flash Storage](./HW_Module/Flash_Storage.md)
 3.  LED/LCD
 4.  Timer
+    1.  [HPET](https://wiki.osdev.org/HPET)
+    2.  [HPET Spec](https://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/software-developers-hpet-spec-1-0a.pdf)
+    3.  [APIC Timer](https://wiki.osdev.org/APIC_timer)
+    4.  [Programmable Interval Timer (PIT)](https://wiki.osdev.org/Programmable_Interval_Timer)
+    5.  [RTC](https://wiki.osdev.org/RTC)
 5.  Sensors
 6.  Bluetooth/BLE
 7.  Wifi
-8.  LTE
+8.  LTE Modem
 9.  USB devices
 10. Memory Protection Unit (MPU)
 11. Memory Management Unit (MMU)
@@ -202,8 +215,10 @@
 1.  [JTAG](https://www.xjtag.com/about-jtag/jtag-a-technical-overview/)
 2.  Trace
 3.  [GDB](http://beej.us/guide/bggdb/)
+    1.  [Remote GDB](https://sourceware.org/gdb/current/onlinedocs/gdb/Remote-Debugging.html#Remote-Debugging)
 4.  Sysfs
 5.  Printk
+6.  [Kernel Debugging](https://wiki.osdev.org/How_Do_I_Use_A_Debugger_With_My_OS)
 
 ### L. Version Control
 1.  GIT
@@ -345,7 +360,11 @@
 2.  [C++ Mock tests](https://www.geeksforgeeks.org/quiz-corner-gq/#C++%20Programming%20Mock%20Tests)
 3.  [Operating system mock tests](https://www.geeksforgeeks.org/quiz-corner-gq/#Operating%20Systems%20Mock%20Tests)
 
-### H. [Interview Preparation](Interview/Preparation/prepare.md)
+### I. [Interview Preparation](Interview/Preparation/prepare.md)
+
+### J. Take-Home challenges
+1. [Fan Controll System](Interview\Company\intuitive\README.md)
+2. [Dynamic Memory Profiling]()
 
 ## Hands-On Projects
 ### A. Raspberry Pi
@@ -393,4 +412,8 @@
 
 [bogotobogo](https://www.bogotobogo.com/cplusplus/multithreading_pthread.php)
 
-[bogotobogo Linux](https://www.bogotobogo.com/Linux/)
+[bogotobogo Linux](https://www.bogotobogo.com/Linux/)
+
+[OSDev.org](https://wiki.osdev.org/Main_Page)
+
+[OS projects](https://wiki.osdev.org/Projects)