Retrieved "ARM TrustZone and ARM Hypervisor Open Source Software".
From the BCM2835 ARM peripherals datasheet we can see section 7 describe the interrupt controller present.
"An Introduction to the ARM Cortex-M3 Processor" (PDF).Retrieved "Unaligned data access".Inspired by papers from the Berkeley risc project, Acorn considered designing its own processor.The SWI instruction was renamed to SVC, though the instruction binary coding is the same.20 In 1992, Acorn once more won the Queen's Award for Technology for the ARM.Memory translation from 48-bit virtual addresses based on the existing Large Physical whirlpool service manual 4505 Address Extension (lpae which was designed to be easily extended to 64-bit.Definitive Guide to the ARM Cortex-M3 and Cortex-M4 Processors ; 3rd Ed; Joseph Yiu; 600 pages; 2013; isbn."ARM's Reach: 50 Billion Chip Milestone".(available only with SAU option) (available in M23/M33/M35P) Silicon options: Optional Floating-Point Unit (FPU single-precision only ieee-754 compliant.Its generally entirely non-portable and youll have to read the manual for your toolchain in order to understand how to write them.After the successful BBC Micro computer, Acorn Computers considered how to move on from the relatively simple MOS Technology 6502 processor to address business markets like the one that was soon dominated by the IBM PC, launched in 1981.C: @brief The BCM2835 Interupt controller peripheral at it's base address static rpi_irq_controller_t* rpiirqcontroller @brief Return the IRQ Controller register set rpi_irq_controller_t* RPI_GetIrqController( void ) return rpiirqcontroller; The ARM Timer Peripheral The ARM timer is in the Basic interrupt set.The documentation here is a bit lacking but see the section that says ARM peripherals interrupts table.Wake-up interrupt controller: Optional.In 2011, the 32-bit ARM architecture was the most widely used architecture in mobile devices and the most popular 32-bit one in embedded systems.The Cortex-M3 / M4 / M7 / M33 / M35P have all base Thumb-1 and Thumb-2 instructions.void interrupt_vector(void) static int lit 0; Clear the ARM Timer interrupt - it's the only interrupt we have enabled, so we want don't have to work out which interrupt source caused us to interrupt RPI_GetArmTimer - irqclear mac os x 10.5 iso direct 1; Flip the LED if( lit ) LED_OFF.Software packages and cross-compiler tools use the armhf.The timer decrements the Value register at a frequency dervied from the system clock.Undefined mode: A privileged mode that is entered whenever an undefined instruction exception occurs.ARM Holdings provides to all licensees an integratable hardware description of the ARM core as well as complete software development toolset ( compiler, debugger, software development kit ) and the right to sell manufactured silicon containing the ARM CPU.
The Code, the code for the tutorial is hosted.
Later, the Thumb instruction set added 16-bit instructions and increased code density.

It is simply a logical AND of the interrupt pending bit and the interrupt enable bit.
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Arm/armel suffixes to differentiate.