This document discusses the ARM processor and operating systems. It begins with an introduction and brief history of ARM. ARM is a 32-bit RISC processor that is small in size, has high performance, and low power consumption. The document then discusses ARM architecture, memory management units, synchronization, swapping, context switching, and input/output functions. It also covers the ARM partnership model and powered products. Operating systems help run programs concurrently without data loss through functions like memory management, privileged mode operation, and resource allocation.

1.  SANJAY . D . DHANDARE Prof.
saniya ansari mam
14,oct,2014
DYPSOE PUNE

3.  INTRODUCTION.
 Brief history.
 Why it is called arm?
 What is operating system?
 Problem in operating system.
 Arm architecture.
 Mmu registers.
 Mmu registers structure.
 Synchronization.

4.  Swapping.
 Context switching.
 Input output function.
 Dma and fast interrupt.
 Arm partnership model.
 Arm powered products.
 Conclusion.
 References.

5.  WHAT IS ARM PROCESSOR?
 32 bits processor.
 ARM is a RISC processor.
 It is small size .
 High performance applications.
 Simple architecture.
 low power consumption.

6.  1985: Acorn Computer Group manufactures
the first commercial RISC microprocessor.
 1990: Acorn and Apple participation leads to
the foundation.
 1991: ARM6, First embeddable RISC
microprocessor.
 1992 – 1994: Various companies use ARM
(Sharp, Samsung), while in 1993 ARM7, the
first multimedia microprocessor is
introduced.

7.  1995: Introduction of Thumb and ARM8.
 1996 – 2000: Alcatel, Hyundai, Philips, Sony,
use ΑRM, while in 1999 η ARM cooperates with
Erickson for the development of Bluetooth.
 2000 – 2002: ARM’s share of the 32 – bit
embedded RISC microprocessor market is 80%.
ARM Developer Suite is introduced.

8.  Arm launched the latest processor named as
CORTEX M7 and planned to launch 64 bits
arm processor for smart phones.
 Holding the top position in designing of
processors for smart phones over the world.
 Arm launched latest operating system called
MBED for 2g 3g and 4g internet operation.

9.  A.R.M. ?
 Advanced RISC Machines.
 R.i.s.c ?
 Reduced instruction set computer.

10. Simple architecture
+ Small size
Simple instruction set Low power
+
Code density

11. It can be defined as –
the system which takes
the input (loading of program) and gives the
output as per program .
 The operating system is said to be efficient if
it able to run program concurrently without
any loss of data.

12.  Speed and memory required.
 Program loading (sharing of time).
 Program execution (priority).
 Access to I/O devices (clean interface).
 Controlled access to files (scheduling).
 Error detection and response (interference).
 Problem solving capability (memory management).

13. Major problem for any operating system are-
 Data interference.
 Memory access.
 Malicious attacks.
 Solution :
Memory management .
 Privileged mode operation.
 Resource allocation.

14. address register
multiply
data out register
instruction
decode
&
control
incrementer
register
bank
barrel
shif ter
A[31:0]
data in register
ALU
control
P
C
PC
A
L
U
b
u
s
A
b
u
s
B
b
u
s
register

18.  Swapping is nothing but the long queue of
stored processes.
 To keep program temporarily out of memory
and brought back into memory for execution.
 Need ?
 Limited memory available .
 Avoid program data interference .
 Increases efficiency.

20. When the process switched takes place then
the content of old process must be saved before
starting the new process .
It helps in resuming the process rather than
starting from first time .(save the time)
 When to switch ?
 For high priority processes.
 For high priority interrupts.
Hence increases the performance*

21.  These functions are carried out by using
Memory mapped addressable peripherals
registers .
 Interrupts input.
 Working .
 If any peripherals is get connect then
automatically the address of memory mapped
register will assign to that peripherals and
hence different function is carried out.

22.  Dma : DIRECT MEMORY ACCESS
 Used when there is need to transmit the
block of data at high speed .
 Fast interrupt :
 If any arm system not provide DMA
technique then by using FIR the data can
be transfer by fast interrupt request.

25.  From above discussion we conclude that the
arm processor found an important role in every
digital instruments which require high speed
and high performance with low power
consumption.

26.  Arm system on chip architecture by steve
furber.
 E-journals and papers.