6,264
edits
Changes
Jump to navigation
Jump to search
Line 185:
Line 185: − +
→ARM11 User-land memory regions
The virtual memory located below 0x20000000 is process-unique, processes can't directly access memory for other processes. The virtual memory starting at 0x20000000 is only accessible in privileged-mode. When service [[Services API|commands]] are used, the kernel maps memory in the destination process for input/output buffers, where the addresses in the command received by the process is replaced by this mapped memory. When this is an input buffer, the buffer data is copied to the mapped memory. When this is an output buffer, the data stored in the mapped memory is copied to the destination buffer specified in the command.
The virtual memory located below 0x20000000 is process-unique, processes can't directly access memory for other processes. The virtual memory starting at 0x20000000 is only accessible in privileged-mode. When service [[Services API|commands]] are used, the kernel maps memory in the destination process for input/output buffers, where the addresses in the command received by the process is replaced by this mapped memory. When this is an input buffer, the buffer data is copied to the mapped memory. When this is an output buffer, the data stored in the mapped memory is copied to the destination buffer specified in the command.
The physical address which memory for the application memory-type is mapped to begins at FCRAM+0, the total memory allocated for this memory-type is stored in [[Configuration_Memory]]. Applications' exefs:/.code under the application memory-type is mapped at FCRAM + APPMEMALLOC - exefs:/.code size aligned to the page size. The application .bss is mapped immediately after this, at FCRAM+APPMEMALLOC.
The physical address which memory for the application memory-type is mapped to begins at FCRAM+0, the total memory allocated for this memory-type is stored in [[Configuration_Memory]]. Applications' exefs:/.code under the application memory-type is mapped at FCRAM + APPMEMALLOC - exefs:/.code size aligned to the page size. The application .bss is mapped at CODEADDR - .bss size aligned down to the page size.
== System memory details ==
== System memory details ==