RTEMS Documentation Project
RTEMS CPU Architecture Supplement
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1. Preface
2. Port Specific Information
2.1. CPU Model Dependent Features
2.1.1. CPU Model Name
2.1.2. Floating Point Unit
2.2. Multilibs
2.3. Calling Conventions
2.3.1. Calling Mechanism
2.3.2. Register Usage
2.3.3. Parameter Passing
2.3.4. User-Provided Routines
2.4. Memory Model
2.4.1. Flat Memory Model
2.5. Interrupt Processing
2.5.1. Vectoring of an Interrupt Handler
2.5.2. Interrupt Levels
2.5.3. Disabling of Interrupts by RTEMS
2.6. Symmetric Multiprocessing
2.7. Thread-Local Storage
2.8. CPU counter
2.9. Interrupt Profiling
2.10. Board Support Packages
2.10.1. System Reset
3. AArch64 Specific Information
3.1. CPU Model Dependent Features
3.1.1. CPU Model Name
3.1.2. Floating Point Unit and SIMD
3.2. Multilibs
3.3. Calling Conventions
3.4. Memory Model
3.5. Interrupt Processing
3.5.1. Interrupt Levels
3.5.2. Interrupt Stack
3.6. Symmetric Multiprocessing
3.7. Thread-Local Storage
4. ARM Specific Information
4.1. CPU Model Dependent Features
4.1.1. CPU Model Name
4.1.2. Count Leading Zeroes Instruction
4.1.3. Floating Point Unit
4.2. Multilibs
4.3. Calling Conventions
4.4. Memory Model
4.5. Interrupt Processing
4.5.1. Interrupt Levels
4.5.2. Interrupt Stack
4.6. Symmetric Multiprocessing
4.7. Thread-Local Storage
5. Atmel AVR Specific Information
5.1. CPU Model Dependent Features
5.1.1. Count Leading Zeroes Instruction
5.2. Calling Conventions
5.2.1. Processor Background
5.2.2. Register Usage
5.2.3. Parameter Passing
5.3. Memory Model
5.4. Interrupt Processing
5.4.1. Vectoring of an Interrupt Handler
5.4.2. Disabling of Interrupts by RTEMS
5.4.3. Interrupt Stack
5.5. Symmetric Multiprocessing
5.6. Thread-Local Storage
5.7. Board Support Packages
5.7.1. System Reset
6. Blackfin Specific Information
6.1. CPU Model Dependent Features
6.1.1. Count Leading Zeroes Instruction
6.2. Calling Conventions
6.2.1. Processor Background
6.2.2. Register Usage
6.2.3. Parameter Passing
6.3. Memory Model
6.4. Interrupt Processing
6.4.1. Vectoring of an Interrupt Handler
6.4.2. Disabling of Interrupts by RTEMS
6.4.3. Interrupt Stack
6.5. Symmetric Multiprocessing
6.6. Thread-Local Storage
6.7. Board Support Packages
6.7.1. System Reset
7. Epiphany Specific Information
8. Intel/AMD x86 Specific Information
8.1. CPU Model Dependent Features
8.1.1. bswap Instruction
8.2. Calling Conventions
8.2.1. Processor Background
8.2.2. Calling Mechanism
8.2.3. Register Usage
8.2.4. Parameter Passing
8.3. Memory Model
8.3.1. Flat Memory Model
8.4. Interrupt Processing
8.4.1. Vectoring of Interrupt Handler
8.4.2. Interrupt Stack Frame
8.4.3. Interrupt Levels
8.4.4. Interrupt Stack
8.5. Symmetric Multiprocessing
8.6. Thread-Local Storage
8.7. Board Support Packages
8.7.1. System Reset
8.7.2. Processor Initialization
9. Lattice Mico32 Specific Information
9.1. CPU Model Dependent Features
9.2. Register Architecture
9.3. Calling Conventions
9.3.1. Calling Mechanism
9.3.2. Register Usage
9.3.3. Parameter Passing
9.4. Memory Model
9.5. Interrupt Processing
9.6. Symmetric Multiprocessing
9.7. Thread-Local Storage
9.8. Board Support Packages
9.8.1. System Reset
10. Renesas M32C Specific Information
11. M68xxx and Coldfire Specific Information
11.1. CPU Model Dependent Features
11.1.1. BFFFO Instruction
11.1.2. Vector Base Register
11.1.3. Separate Stacks
11.1.4. Pre-Indexing Address Mode
11.1.5. Extend Byte to Long Instruction
11.2. Calling Conventions
11.2.1. Calling Mechanism
11.2.2. Register Usage
11.2.3. Parameter Passing
11.3. Memory Model
11.4. Interrupt Processing
11.4.1. Vectoring of an Interrupt Handler
11.4.1.1. Models Without Separate Interrupt Stacks
11.4.1.2. Models With Separate Interrupt Stacks
11.4.2. CPU Models Without VBR and RAM at 0
11.4.3. Interrupt Levels
11.5. Symmetric Multiprocessing
11.6. Thread-Local Storage
11.7. Board Support Packages
11.7.1. System Reset
11.7.2. Processor Initialization
12. Xilinx MicroBlaze Specific Information
12.1. CPU Model Dependent Features
12.2. Calling Conventions
12.3. Interrupt Processing
12.3.1. Interrupt Levels
12.3.2. Interrupt Stack
12.4. Symmetric Multiprocessing
12.5. Thread-Local Storage
13. MIPS Specific Information
13.1. CPU Model Dependent Features
13.1.1. Another Optional Feature
13.2. Calling Conventions
13.2.1. Processor Background
13.2.2. Calling Mechanism
13.2.3. Register Usage
13.2.4. Parameter Passing
13.3. Memory Model
13.3.1. Flat Memory Model
13.4. Interrupt Processing
13.4.1. Vectoring of an Interrupt Handler
13.4.2. Interrupt Levels
13.5. Symmetric Multiprocessing
13.6. Thread-Local Storage
13.7. Board Support Packages
13.7.1. System Reset
13.7.2. Processor Initialization
14. Altera Nios II Specific Information
14.1. Symmetric Multiprocessing
14.2. Thread-Local Storage
15. OpenRISC 1000 Specific Information
15.1. Calling Conventions
15.1.1. Floating Point Unit
15.2. Memory Model
15.3. Interrupt Processing
15.3.1. Interrupt Levels
15.3.2. Interrupt Stack
15.4. Symmetric Multiprocessing
16. PowerPC Specific Information
16.1. Multilibs
16.2. Application Binary Interface
16.3. Special Registers
16.4. Memory Model
16.5. Interrupt Processing
16.5.1. Interrupt Levels
16.5.2. Interrupt Stack
16.6. Symmetric Multiprocessing
16.7. Thread-Local Storage
16.8. 64-bit Caveats
17. RISC-V Specific Information
17.1. Calling Conventions
17.2. Multilibs
17.3. Interrupt Processing
17.3.1. Interrupt Levels
17.3.2. Interrupt Stack
17.4. Symmetric Multiprocessing
17.5. Thread-Local Storage
18. SuperH Specific Information
18.1. CPU Model Dependent Features
18.1.1. Another Optional Feature
18.2. Calling Conventions
18.2.1. Calling Mechanism
18.2.2. Register Usage
18.2.3. Parameter Passing
18.3. Memory Model
18.3.1. Flat Memory Model
18.4. Interrupt Processing
18.4.1. Vectoring of an Interrupt Handler
18.4.2. Interrupt Levels
18.5. Symmetric Multiprocessing
18.6. Thread-Local Storage
18.7. Board Support Packages
18.7.1. System Reset
18.7.2. Processor Initialization
19. SPARC Specific Information
19.1. CPU Model Dependent Features
19.1.1. CPU Model Feature Flags
19.1.1.1. CPU Model Name
19.1.1.2. Floating Point Unit
19.1.1.3. Bitscan Instruction
19.1.1.4. Number of Register Windows
19.1.1.5. Low Power Mode
19.1.2. CPU Model Implementation Notes
19.2. Calling Conventions
19.2.1. Programming Model
19.2.1.1. Non-Floating Point Registers
19.2.1.2. Floating Point Registers
19.2.1.3. Special Registers
19.2.2. Register Windows
19.2.3. Call and Return Mechanism
19.2.4. Calling Mechanism
19.2.5. Register Usage
19.2.6. Parameter Passing
19.2.7. User-Provided Routines
19.3. Memory Model
19.3.1. Flat Memory Model
19.4. Interrupt Processing
19.4.1. Synchronous Versus Asynchronous Traps
19.4.2. Trap Table
19.4.3. Vectoring of Interrupt Handler
19.4.4. Traps and Register Windows
19.4.5. Interrupt Levels
19.4.6. Disabling of Interrupts by RTEMS
19.4.7. Interrupt Stack
19.5. Symmetric Multiprocessing
19.6. Thread-Local Storage
19.7. Board Support Packages
19.7.1. System Reset
19.7.2. Processor Initialization
19.8. Stacks and Register Windows
19.8.1. General Structure
19.8.2. Register Semantics
19.8.3. Register Windows and the Stack
19.8.4. Procedure epilogue and prologue
19.8.5. Procedures, stacks, and debuggers
19.8.6. The window overflow and underflow traps
20. SPARC-64 Specific Information
20.1. CPU Model Dependent Features
20.1.1. CPU Model Feature Flags
20.1.1.1. CPU Model Name
20.1.1.2. Floating Point Unit
20.1.1.3. Number of Register Windows
20.1.2. CPU Model Implementation Notes
20.1.2.1. sun4u Notes
20.1.3. sun4v Notes
20.2. Calling Conventions
20.2.1. Programming Model
20.2.1.1. Non-Floating Point Registers
20.2.1.2. Floating Point Registers
20.2.1.3. Special Registers
20.2.2. Register Windows
20.2.3. Call and Return Mechanism
20.2.4. Calling Mechanism
20.2.5. Register Usage
20.2.6. Parameter Passing
20.2.7. User-Provided Routines
20.3. Memory Model
20.3.1. Flat Memory Model
20.4. Interrupt Processing
20.4.1. Synchronous Versus Asynchronous Traps
20.4.2. Vectoring of Interrupt Handler
20.4.3. Traps and Register Windows
20.4.4. Interrupt Levels
20.4.5. Disabling of Interrupts by RTEMS
20.4.6. Interrupt Stack
20.5. Symmetric Multiprocessing
20.6. Thread-Local Storage
20.7. Board Support Packages
20.7.1. HelenOS and Open Firmware
21. References
Index
RTEMS CPU Architecture Supplement
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