crosscompiler:hardware
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| crosscompiler:hardware [2018/11/06 11:15] – ursgraf | crosscompiler:hardware [2020/12/10 15:29] (current) – ursgraf | ||
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| ====== Accessing the Hardware ====== | ====== Accessing the Hardware ====== | ||
| - | Java was developed as a save language. It does not allow direct access and manipulation of absolute memory locations. Nevertheless this is essential for embedded programming. We therefore include this possibility by the use a special | + | Java was developed as a safe language. It does not allow direct access and manipulation of absolute memory locations. Nevertheless this is essential for embedded programming. We therefore include this possibility by the use a special |
| By using '' | By using '' | ||
| * read from absolute memory locations (1, 2, 4, 8 bytes) | * read from absolute memory locations (1, 2, 4, 8 bytes) | ||
| Line 10: | Line 10: | ||
| * get the address of a object | * get the address of a object | ||
| - | * read and write directly to machine registers (GPRs, FPRs, SPRs) | + | Depending on the processor architecture there are some more unsafe capabilities. |
| + | ==== On the PowerPC platform ==== | ||
| + | '' | ||
| + | | ||
| + | * enable the use of floats for exception routines | ||
| + | ==== On the ARM platform ==== | ||
| + | '' | ||
| + | * read and write directly to machine registers (GPRs, EXTRs, CPRs) | ||
| * enable the use of floats for exception routines | * enable the use of floats for exception routines | ||
| - | The API of US.java can be found under: | + | The API of US can be found under: |
crosscompiler/hardware.1541499336.txt.gz · Last modified: 2018/11/06 11:15 by ursgraf
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